Castle Cove - Northbridge

SA2

Greater Sydney / Chatswood - Lane Cove

 
 
 
 
 
 
 
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Statistical Area (SA2) Boundary Analysis

This analysis uses ABS Statistical Areas Level 2 (SA2) boundaries, which can materially differ from Suburbs and Localities (SAL) even when sharing similar names.

SA2 boundaries are defined by the Australian Bureau of Statistics and are designed to represent communities for statistical reporting (e.g., census and ERP).

Suburbs and Localities (SAL) represent commonly-used suburb/locality names (postal-style areas) and may use different geographic boundaries. For comprehensive analysis, consider reviewing both boundary types if available.

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Sales ActivityProperty Sales Trends in Castle Cove - Northbridge

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The median house price in Castle Cove - Northbridge is $4.52m, with units at $1.22m. House values have moved 2.0% a year compounded over five years.

Curious about local property values? Filter the chart to assess the volume and appreciation (including resales) trends and regional comparisons, or scroll to the map below view this information at an individual property level.

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DemographicsPopulation Growth in Castle Cove - Northbridge

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Castle Cove - Northbridge has an estimated 13,629 residents, up from 13,440 at the 2021 Census — a change of 189 people, or 1.4%. That puts 1,775 residents on each square kilometre. Population is estimated from ABS Estimated Resident Population releases and GNAF address data, re-based from the 2021 Census and updated annually.

Detail

AreaSearch indicates that the population of Castle Cove - Northbridge is approximately 13,629 as of May 2026. This represents a growth of 189 residents (1.4%) relative to the 2021 Census, which recorded 13,440 inhabitants. This shift is calculated using the ABS estimated resident population of 13,592 from June 2025 alongside 28 validated new addresses recorded since the Census. The resulting population density is 1,774 persons per square kilometer, exceeding the typical figure for national locations analyzed by AreaSearch. Overseas migration served as the primary source of population gains, acting as the main driver of growth in recent times.

AreaSearch incorporates ABS and Geoscience Australia projections for each SA2 region, published in 2024 with a 2022 baseline. For SA2 regions lacking this coverage, NSW State Government projections from 2022 with a 2021 baseline are applied. Age bracket growth rates from these datasets are projected forward for the years 2032 to 2041. Future demographic trends indicate a general contraction, with the local population projected to decrease by 63 persons by 2041 under this framework. Conversely, expansion is projected in certain age cohorts, particularly the 85 and over group, which is estimated to increase by 518 people.

Frequently Asked Questions - Population

What is the latest population estimate for the Castle Cove - Northbridge SA2?
Total population for the Castle Cove - Northbridge SA2 was estimated to be approximately 13,629 as at May 26. This is based upon an estimated resident population of 13,592 from the ABS up to June 2025.
How has the population in the Castle Cove - Northbridge SA2 changed since 2021?
The castle cove - northbridge sa2 has added approximately 189 people and shown a 1.41% increase from the 13,440 people recorded at the 2021 Census period.
What is the population density in the Castle Cove - Northbridge SA2?
The population density in the Castle Cove - Northbridge SA2 is estimated at 1,774 persons per square kilometer based on the latest population estimate.
How much has the population grown over the past 10 years in the Castle Cove - Northbridge SA2?
Over the past 10 years, the population in the Castle Cove - Northbridge SA2 has shown a compound annual growth rate of -0.1% per annum.
What are the main drivers of population growth in the Castle Cove - Northbridge SA2?
Population growth in the Castle Cove - Northbridge SA2 is driven by: Overseas migration (100.0%), Natural increase (0.0%), Interstate migration (0.0%). The primary driver is Overseas migration, contributing 100.0% of overall population gains.

Residential SupplyHousing Development & Building Approvals in Castle Cove - Northbridge

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171 new dwellings have been approved in Castle Cove - Northbridge over the past five years, an average of 34 a year. That is 2.5 approvals per 1,000 residents. Of the 33 dwellings approved in the latest reporting year, 55% were detached houses and the rest townhouses or apartments. Approvals are currently running at an annualised 87, running ahead of that longer-run average. Figures come from ABS building approvals aggregated to this SA2 boundary and are updated monthly as the ABS releases them.

Detail

Annual residential approvals in Castle Cove - Northbridge average approximately 34 dwellings, with 171 homes approved during the past 5 financial years (from FY-21 to FY-25) and 80 approved during FY-26 to date. With the population decreasing recently, this new supply has likely met local demand, offering options for purchasers, while newly approved dwellings average $1,242,000 in value, pointing to a developer focus on high-end, premium projects. Additionally, commercial approvals total $653,000 for the current financial year, representing low levels of commercial development. Building activity in Castle Cove - Northbridge is substantially lower than the Greater Sydney average, sitting 60.0% below the regional per capita figure.

This limited supply of new dwellings generally supports demand and valuations for established homes. Construction volumes are also below the national average, pointing to the mature state of the area and potential planning limitations. Recent residential approvals consist of 55.0% separate houses and 45.0% medium to high-density options, representing an evolving mix of attached dwellings that provides choices across different price points, from large family residences to compact options. This marks a shift from the current housing stock (where houses comprise 84.0%), showing a reduction in vacant land and reflecting modern lifestyles alongside the requirement for diverse, accessible housing. The ratio of 364 people per dwelling approval indicates a mature market. Given that demographic forecasts indicate either stable or declining resident numbers, Castle Cove - Northbridge is likely to experience less pressure on housing demand, which should benefit buyers.

Frequently Asked Questions - Development

How many dwelling approvals have occurred in the Castle Cove - Northbridge SA2 recently?
Dwelling approval activity in the the Castle Cove - Northbridge SA2 area has seen 75 residential approvals over the past two financial years, based on AreaSearch's SA2 aggregation method. The Castle Cove - Northbridge SA2's current population of 13,629 has been supported by 34 approvals on average over recent years.
How does the Castle Cove - Northbridge SA2's development activity compare to the broader region?
The Castle Cove - Northbridge SA2 has seen 0.25 approvals per 100 people in recent years, compared to 0.65 approvals in the broader region. This means that one dwelling has been approved for every 364 people in the Castle Cove - Northbridge SA2, compared to one for every 190 in the broader region.
Is the Castle Cove - Northbridge SA2 keeping up with housing demand?
Population forecasts suggest stable or declining population, reducing pressure on housing supply in the the Castle Cove - Northbridge SA2 area.
What has been the trend in development approvals over the past five years in the Castle Cove - Northbridge SA2?
Looking at development activity over the past five years, the Castle Cove - Northbridge SA2's approval levels have been significantly above the yearly average of 34, indicating strong recent growth in development activity.
How does recent development compare to population growth in the Castle Cove - Northbridge SA2?
Over the past five years, the population in the Castle Cove - Northbridge SA2 has grown by approximately 977 people, while 171 residential approvals were recorded. This equates to a ratio of 5.7 people added for each new dwelling approval. This high ratio suggests strong population growth relative to housing supply, potentially indicating unmet housing demand.
Are there opportunities for residential developers in the Castle Cove - Northbridge SA2?
With dwelling approval activity running at an average of 34 approvals per year and a population of 13,629, stable population forecasts suggest a mature market with selective development opportunities.
Approvals Pipeline Development applications near Castle Cove - Northbridge

Development applications around Castle Cove - Northbridge

Development approvals is a new addition to AreaSearch. We’re actively expanding council coverage and refining the dataset — details and statuses for some councils may be partial. Check back regularly for the latest pipeline.
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SOURCE: Planning portals and council registers, compiled by AreaSearch. Distance & bearing measured from the suburb midpoint.

Project PipelineInfrastructure & Major Projects in Castle Cove - Northbridge

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AreaSearch tracks 2 current infrastructure and development projects inside Castle Cove - Northbridge, worth an estimated $52 million. A further 157 sit in the immediately surrounding suburbs, taking the tracked pipeline within reach of the area to $42.3 billion. 33 are already under construction and 71 are due for completion within three years. The pipeline spans residential development, communities, precincts & urban renewal and communities. Records are compiled from Infrastructure Australia, state agencies, council planning portals and public announcements, reviewed and updated daily, then ranked by proximity, construction stage, completion horizon and project scale.

Detail

Local infrastructure projects, developments, and planning schemes are key drivers of regional outcomes. AreaSearch has tracked 35 projects expected to influence the local area. Significant projects include the Northbridge Public School Upgrade, Flo Northbridge by WINIM, Aurora Willoughby, and The Quarry Naremburn, with details on the most relevant works listed below.

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Frequently Asked Questions - Infrastructure

What are some of the major infrastructure and planning changes likely to influence the Castle Cove - Northbridge SA2?
Key infrastructure and planning changes likely to influence the Castle Cove - Northbridge SA2 include: Northbridge Public School Upgrade (Planning); Flo Northbridge by WINIM (Approved); Aurora Willoughby (Planning); The Quarry Naremburn (Construction); and St Leonards Telstra Exchange Mixed-Use Tower (Approved). These projects represent significant developments that will shape the area's future infrastructure landscape.
What types of infrastructure projects are impacting the Castle Cove - Northbridge SA2?
Infrastructure development impacting the Castle Cove - Northbridge SA2 spans multiple sectors including Residential Development, Communities, Precincts & Urban Renewal, and Education & Training.
What is the scale of infrastructure investment impacting the Castle Cove - Northbridge SA2?
Infrastructure investment analysis indicates substantial capital deployment exceeding $3.1 billion in projects that will impact the extended area, with a notable concentration of investment within the immediate the Castle Cove - Northbridge SA2 vicinity.
How does the Castle Cove - Northbridge SA2's infrastructure development compare to other areas?
The Castle Cove - Northbridge SA2 ranks in the top 10% nationally for infrastructure development, reflecting exceptional investment activity compared to similar areas across the country.
Northbridge Public School Upgrade
Category: Education & Training
Stage: Completed | Est. Comp: 2026
Source / Links: Link 1   

Completed NSW Government upgrade to Northbridge Public School, delivered by School Infrastructure NSW under the Rebuilding Public Education program. The $2.4 million project replaced ageing demountable amenities with a new permanent amenities building adjacent to the play area, including accessible toilets, plus refurbishment of the sick bay and associated amenities in the Administration building and renovation of staff amenities. New landscaping was delivered around the works, featuring tiered decking, climbing boards, a natural play area and shade sails.Construction commenced in October 2025 and was completed in July 2026, with all areas now open for student and staff use. Builder was Unique Building Partners. The school is located in the Willoughby electorate.

Education & Training

Flo Northbridge by WINIM
Category: Residential Development
Stage: Approved | Est. Comp: 2025
Source / Links: Link 1   Link 2  

Luxury boutique development by WINIM comprising 7 oversized townhomes and 5 spacious apartments designed by Rothelowman. Features private gardens, internal lifts, and premium finishes opposite Northbridge Shore Playing Fields. The project includes a four-storey six-apartment building and three-storey seven-townhome building on an L-shaped 2052sq m site, featuring a mix of two and three-bedroom apartments, three and four-bedroom townhouses, and a four-bedroom penthouse.

Residential Development

Aurora Willoughby
Category: Residential Development
Stage: Planning | Est. Comp: 2026
Source / Links: Link 1   

Boutique collection of 12 luxury 1, 2 and 3-bedroom apartments setting a new benchmark in high-end living. Inspired by nature and defined by architectural elegance, featuring contemporary design with premium finishes and landscaped spaces integrated with natural surroundings. Developed by Sun Property Group with Datlas as builder, featuring sophisticated light-filled interiors, open-plan entertaining spaces, generous terraces, and hanging gardens. Located at the gateway to Willoughby village with proximity to transport connectivity.

Residential Development

The Quarry Naremburn
Category: Residential Development
Stage: Construction | Est. Comp: 2026
Source / Links: Link 1   Link 2  

Boutique collection of 28 luxury apartments and townhouses set within a landscaped former quarry site in Naremburn. The project is currently under construction.

Residential Development

Areas 18-20 St Leonards South
Category: Residential Development
Stage: Approved | Est. Comp: 2027
Source / Links: Link 1   Link 2  

Residential development within the St Leonards South precinct, involving demolition of existing structures and construction of five residential flat buildings with 207 apartments, basement parking, and communal open space, contributing to urban renewal and increased housing density.

Residential Development

270 Willoughby Road Mixed Use Development
Category: Communities, Precincts & Urban Renewal
Stage: Approved | Est. Comp: 2026

Approved mixed-use development featuring 235sqm of prime retail on ground level with 8 residential apartments above. B1 Neighbourhood Centre zoning with 1.5:1 FSR and 11m height limit. Designed by Architecture Urbaneia.

Communities, Precincts & Urban Renewal

Coronation Archer Street Chatswood
Category: Communities
Stage: Construction | Est. Comp: 2027
Source / Links: Link 1   Link 2  

A $250 million, 32-storey State Significant Development delivering over 150 one, two, three and four-bedroom apartments and penthouses, including 41 affordable units. Ground-level podium provides approximately 2,500sqm of retail and commercial space. A heritage-listed building on site is sensitively restored for fine dining and wellness uses, complemented by communal landscaped open space. Designed by Woods Bagot. Groundbreaking occurred April 2025 with completion targeted Q1 2027.

Communities

Park Residences Cremorne
Category: Residential Development
Stage: Construction | Est. Comp: 2026
Source / Links: Link 1   Link 2  

Boutique luxury residential development comprising 11 oversized two and three bedroom apartments and a full-floor penthouse overlooking Middle Harbour. Developed by Abadeen with architecture by MHNDU, the project is now in its final construction stage and is actively marketing completed-quality residences.

Residential Development

Jobs & IndustryEmployment Trends in Castle Cove - Northbridge

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6,900 residents of Castle Cove - Northbridge are employed, from a labour force of 7,066. Unemployment sits at 2.3%, with participation at 62.3%. Weighted for its industry mix, the area's sectors are forecast to grow about 7.7% nationally over five years. That reflects industry composition only and makes no allowance for local population growth. The working-day population is estimated at 11,687, about 86% of the resident population, so more people leave the area for work than travel in. Unemployment and labour force come from ABS Small Area Labour Markets, updated quarterly; the industry and occupation profile is from the 2021 Census.

Detail

The workforce of Castle Cove - Northbridge is characterized by high levels of education, with strong representation in the technology industry, a low unemployment rate of 2.3%, and job growth estimated at 1.8% over the past year. Employed residents numbered 6,900 as of March 2026, with the unemployment rate tracking 1.8% below the Greater Sydney average of 4.1%, while workforce participation is notably lower at 62.3% compared to the metropolitan rate of 69.1%. Census data indicates that 64.8% of employed residents worked from home, though this figure was influenced by pandemic-related lockdowns.

The primary employment sectors for residents are professional & technical services, financial & insurance services, and healthcare & social assistance. Professional & technical services show a strong local concentration, with an employment share 1.9 times the metropolitan average. In contrast, the construction sector is underrepresented at 4.9% compared to the regional benchmark of 8.6%. The count of local workers versus resident workers suggests this residential suburb offers few employment opportunities within its own boundaries. AreaSearch analysis of SALM and ABS statistics shows that in the year ending March 2026, employment grew by 1.8% and the labor force expanded by 1.4%, leading to a 0.4 percentage point reduction in the unemployment rate. Over the same timeframe, Greater Sydney recorded job growth of 1.9% and labor force growth of 1.9%, accompanied by a minor decrease in unemployment. Jobs and Skills Australia forecasts from May-25 offer additional context regarding long-term employment trends. These five and ten-year projections have been applied to the local workforce structure to model future growth. Although national employment is projected to rise by 6.6% over five years and 13.7% over ten years, growth rates vary by industry. Weighting these projections to the local employment mix suggests Castle Cove - Northbridge employment could grow by 7.7% over five years and 15.2% over ten years, representing a simple mathematical scaling that excludes localized population projections.

Frequently Asked Questions - Employment

What is the employment situation in the Castle Cove - Northbridge SA2?
As of March 2026, the Castle Cove - Northbridge SA2 has approximately 6,900 employed residents with an unemployment rate of 2.3%. This very low unemployment rate indicates a tight labour market with strong demand for workers. The area ranks in the top 25% nationally for employment performance, indicating a robust job market.
How does the Castle Cove - Northbridge SA2's unemployment rate compare to the broader region?
As of March 2026, the unemployment rate in the Castle Cove - Northbridge SA2 stands at 2.3%, which is 1.8 percentage points below Greater Sydney's rate of 4.1%. This lower unemployment rate suggests stronger local employment conditions. For comparison, the national unemployment rate is 4.2%.
What are the major employment sectors in the Castle Cove - Northbridge SA2?
The employment landscape in the Castle Cove - Northbridge SA2 is dominated by several key sectors. The largest employers are professional & technical (21.5% of employment), finance & insurance (14.9%), and health care & social assistance (12.2%). Other significant employers include education & training and retail trade.
How has employment changed recently in the Castle Cove - Northbridge SA2?
Over the past year to March 2026, the Castle Cove - Northbridge SA2 has experienced employment growth, with total employment increasing while the labour force increased. As a result, the unemployment rate has fall. By comparison, Greater Sydney saw employment increased and its unemployment rate dropped.
What is the workforce participation rate in the Castle Cove - Northbridge SA2?
The workforce participation rate in the Castle Cove - Northbridge SA2 is 62.3%, which represents the proportion of working-age residents who are either employed or actively seeking work. This healthy participation rate reflects good employment opportunities and workforce engagement. The local rate trailing the Greater Sydney average of 69.1%, suggesting potential for increased workforce participation.
Which industries are over-represented in the Castle Cove - Northbridge SA2's employment market?
The castle cove - northbridge sa2 shows notable specialization in professional & technical, which employs 21.5% of the local workforce compared to 11.5% regionally. This concentration suggests the area has developed competitive advantages in this sector. The area also shows above-average employment in 2 other sectors, contributing to a distinctive economic profile.
What are the employment growth prospects for the Castle Cove - Northbridge SA2?
Based on Jobs and Skills Australia projections applied to the Castle Cove - Northbridge SA2's industry mix, employment is expected to grow by 7.7% over the next five years and 15.2% over ten years. This exceeds the national forecast of 6.6% over five years, suggesting the area's industry composition is well-positioned for future growth. Steady growth is anticipated across multiple sectors, providing diverse employment opportunities.
How does the job market in the Castle Cove - Northbridge SA2 compare nationally?
The castle cove - northbridge sa2's employment market shows strong performance nationally, ranking in the top 25% of areas assessed by AreaSearch. This indicates robust employment conditions and economic vitality compared to other regions. Recent job advertisement trends show the broader employment region saw a 5.9% decline, ranking 29.0th out of 37 regions nationally.
What employment opportunities exist for skilled workers in the Castle Cove - Northbridge SA2?
Skilled workers will find excellent opportunities in the Castle Cove - Northbridge SA2, with knowledge-intensive sectors comprising 60.0% of local employment. Key sectors for skilled workers include professional & technical (21.5%), finance & insurance (14.9%), and health care & social assistance (12.2%). With projected employment growth of 7.7% over five years, demand for skilled workers is expected to remain strong.

EarningsHousehold Income in Castle Cove - Northbridge

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Median household income in Castle Cove - Northbridge is $3,987 a week (about $207,000 a year), with median personal income at $1,355 a week. ATO records put median taxable income at $77,695 a year against an average of $173,909. The average runs 124% above the median, a wider spread than most areas and a sign of a concentrated group of high earners. Household income is from the 2021 Census; taxable income is from ATO Taxation Statistics for the latest financial year available, indexed forward using the ABS Wage Price Index.

Detail

Taxpayer statistics released by the ATO for the 2023 financial year show that the Castle Cove - Northbridge SA2 recorded a median taxpayer income of $77,695 and an average income of $173,909. These figures are high on a national scale and compare to Greater Sydney benchmarks of $60,817 for median income and $83,003 for average income. Adjusting for a Wage Price Index increase of 10.32% since the 2023 financial year yields estimated figures of $85,713 for median income and $191,856 for average income as of March 2026. The 2021 Census shows that household, family, and individual incomes in the area rank in the 96th to 99th percentiles nationally.

Income distribution is dominated by the $4000+ weekly bracket, which accounts for 49.9% of residents (6,800 people), contrasting with regional trends where the $1,500 - 2,999 bracket is largest at 30.9%. High weekly earnings exceeding $3,000 are recorded by 59.8% of households, indicating high disposable income. Residents retain 88.0% of their income after meeting housing costs, and the area is positioned in the 10th decile of the SEIFA index for income.

Frequently Asked Questions - Income

What is the median taxable income in the Castle Cove - Northbridge SA2?
Based on Wage Price Index adjustments to March 2026, the estimated median taxable income in the Castle Cove - Northbridge SA2 is approximately $85,713. The official ATO data from FY-23 recorded a median of $77,695.
What is the average taxable income in the Castle Cove - Northbridge SA2?
Based on Wage Price Index adjustments to March 2026, the estimated average taxable income in the Castle Cove - Northbridge SA2 is approximately $191,856. The official ATO data from FY-23 recorded an average of $173,909.
How does the median taxable income in the Castle Cove - Northbridge SA2 compare to the region?
Based on Wage Price Index adjustments to March 2026, the estimated median taxable income in the Castle Cove - Northbridge SA2 is approximately $85,713 compared to $67,093 in Greater Sydney. The official ATO data from FY-23 shows $77,695 and $60,817 respectively.
How does the average taxable income in the Castle Cove - Northbridge SA2 compare to the region?
Based on Wage Price Index adjustments to March 2026, the estimated average taxable income in the Castle Cove - Northbridge SA2 is approximately $191,856 compared to $91,569 in Greater Sydney. The official ATO data from FY-23 shows $173,909 and $83,003 respectively.
What are the main income cohorts in the Castle Cove - Northbridge SA2 according to the 2021 Census?
As per the 2021 Census, the income bracket containing the largest proportion (~49.9% / 6,800 persons) of the Castle Cove - Northbridge SA2's population is the $4000+ cohort.
How do the main income cohorts in the Castle Cove - Northbridge SA2 compare to the region?
The largest income cohort in the Castle Cove - Northbridge SA2 is the $4000+ group, representing about 49.9% of the population. In comparison, Greater Sydney's largest income cohort is the $1,500 - 2,999 group, representing 30.9% of its population, according to the 2021 Census.
What is the median household income in the Castle Cove - Northbridge SA2 according to the 2021 Census?
The 2021 Census data indicates that the median household income in the Castle Cove - Northbridge SA2 is $3,987/wk.
What is the median family income in the Castle Cove - Northbridge SA2 according to the 2021 Census?
According to the 2021 Census, the median family income in the Castle Cove - Northbridge SA2 is $4,641/wk.
What is the median personal income in the Castle Cove - Northbridge SA2 according to the 2021 Census?
The 2021 Census shows that the median personal income in the Castle Cove - Northbridge SA2 is $1,355/wk.
How does the Castle Cove - Northbridge SA2's income rank nationally?
The Castle Cove - Northbridge SA2's income level is among the top percentile nationally according to the latest ATO data aggregated by AreaSearch for FY-23. The Castle Cove - Northbridge SA2's median income among taxpayers is $77,695 and the average income stands at $173,909, which compares to figures for Greater Sydney's of $60,817 and $83,003 respectively. Based on Wage Price Index growth of 10.32% since FY-23, current estimates would be approximately $85,713 (median) and $191,856 (average) as of March 2026.
What is the disposable income in the Castle Cove - Northbridge SA2?
The estimated disposable income in the Castle Cove - Northbridge SA2 is $15,202 per year according to AreaSearch analysis.
How does the Castle Cove - Northbridge SA2's disposable income compare to the region?
The castle cove - northbridge sa2's disposable income is $15,202 compared to $7,412 for Greater Sydney, based on AreaSearch analysis.

Housing StockHousing & Dwellings in Castle Cove - Northbridge

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Castle Cove - Northbridge had 4,410 occupied dwellings at the 2021 Census, 85% detached houses and 10% apartments. 35% are owned with a mortgage, 15% rented and 50% owned outright. At that Census the median rent was $850 a week and the median mortgage repayment $4,333 a month, a total housing cost higher than 97% of areas nationally. Rent absorbs 21.3% of household income here and mortgage repayments 25.1%. Dwelling stock, tenure and housing costs are 2021 Census measures — the only source that counts dwellings at this boundary size.

Detail

The local housing stock at the time of the latest Census consisted of 84.5% separate houses and 15.5% semi-detached, apartment, or other dwelling types, compared to the Sydney metropolitan breakdown of 55.9% houses and 44.1% other dwellings. Home ownership in Castle Cove - Northbridge was high at 49.8%, with 34.8% of properties mortgaged and 15.4% rented. The median monthly mortgage payment of $4,333 was higher than the metropolitan average of $2,427, and the median weekly rent was $850 compared to the metropolitan median of $470. Locally, mortgage payments are higher than the Australian average of $1,863, and weekly rents are above the national average of $375.

Frequently Asked Questions - Housing

What percentage of homes are owned vs rented in the Castle Cove - Northbridge SA2?
In the Castle Cove - Northbridge SA2, 49.8% of homes are owned outright, 34.8% are owned with a mortgage, and 15.4% are rented.
What percentage of dwellings in the Castle Cove - Northbridge SA2 are houses?
According to the latest data, 84.5% of dwellings in the Castle Cove - Northbridge SA2 are houses.
What percentage of dwellings in the Castle Cove - Northbridge SA2 are apartments or units?
In the Castle Cove - Northbridge SA2, 10.3% of dwellings are apartments or units, with an additional 4.9% being semi-detached dwellings.
What is the level of outright home ownership in the Castle Cove - Northbridge SA2?
Outright home ownership in the Castle Cove - Northbridge SA2 stands at 49.8%, compared to 28.7% in Greater Sydney.
What is the median monthly mortgage repayment in the Castle Cove - Northbridge SA2?
The median monthly mortgage repayment in the Castle Cove - Northbridge SA2 is $4,333, compared to $2,427 in Greater Sydney.
What is the median weekly rent in the Castle Cove - Northbridge SA2?
The median weekly rent in the Castle Cove - Northbridge SA2 is $850, compared to $470 in Greater Sydney.
What is the distribution of rental prices in the Castle Cove - Northbridge SA2?
In the Castle Cove - Northbridge SA2, 2.2% of rentals are $0-149/week, 4.4% are $150-349/week, 25.7% are $350-649/week, 27.2% are $650-949/week, and 40.5% are $950+/week.
What is the average monthly housing cost in the Castle Cove - Northbridge SA2?
The aggregate monthly housing cost in the Castle Cove - Northbridge SA2 is $2,075, which represents the average monthly cost across all housing types.
What percentage of income do residents spend on housing in the Castle Cove - Northbridge SA2?
In the Castle Cove - Northbridge SA2, households with mortgages typically spend 25.1% of their income on mortgage repayments, while renters spend 21.3% of their income on rent.
How crowded are homes in the Castle Cove - Northbridge SA2?
The average persons per bedroom ratio in the Castle Cove - Northbridge SA2 is 0.8, indicating the level of household density.
How does housing affordability in the Castle Cove - Northbridge SA2 compare to the region?
Housing affordability in the Castle Cove - Northbridge SA2 shows mortgage holders spending 25.1% of income on repayments (vs 27.0% regionally), while renters spend 21.3% of income on rent (vs 22.6% regionally).
What types of dwellings are most common in the Castle Cove - Northbridge SA2?
The dwelling mix in the Castle Cove - Northbridge SA2 consists of 84.5% detached houses, 4.9% semi-detached dwellings, 10.3% apartments, and 0.3% other dwelling types.
What is the weighted average housing cost based on tenure mix in the Castle Cove - Northbridge SA2?
Given the tenure profile of the area, the weighted average monthly housing cost is approximately $2,075. This accounts for outright owners paying no housing costs, mortgage holders paying $4,333/month, and renters paying $3,680/month.
How affordable is housing in the Castle Cove - Northbridge SA2 relative to local incomes?
Housing in Castle Cove - Northbridge consumes approximately 12.0% of median household income ($17,264 monthly), indicating costs are highly affordable. The generally accepted benchmark is that housing should not exceed 30% of household income.
How do proposed developments compare to existing housing types in the Castle Cove - Northbridge SA2?
Recent development applications in Castle Cove - Northbridge show attached dwellings contributing 37% of approvals compared to 16% of existing stock, while detached houses represent 63% of applications versus 84% of current dwellings. This suggests increasing densification. Housing density growth is around the national average.

HouseholdsHousehold Composition in Castle Cove - Northbridge

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Castle Cove - Northbridge counted 4,410 households at the 2021 Census, averaging 2.9 people each. 48% are couples with children, more than in 93% of areas nationally, against 26% couples without children. 16% of households are people living alone, and families average 1.6 children. Household and family composition is measured only by the Census, so these are 2021 figures.

Detail

Families comprise 83.1% of local households, consisting of couples with children at 48.3%, couples without children at 26.3%, and single-parent households at 7.9%. Non-family living arrangements account for the remaining 16.9%, consisting of single-person households at 15.8% and group households at 1.1%. The median household size is 2.9 persons, which is larger than the Greater Sydney average of 2.7.

Frequently Asked Questions - Households

How many households are in the Castle Cove - Northbridge SA2?
As of the 2021 Census, the Castle Cove - Northbridge SA2 had 4,410 households. Based on population growth patterns, this has grown by approximately 1.4% to an estimated 4,472 households today.
What is the typical household size?
The median household size in the Castle Cove - Northbridge SA2 is 2.9 people. This compares to 2.7 in Greater Sydney and reflects the area's household composition mix.
What types of households are most common?
Family households dominate at 83.1% of all households. The remaining households consist of lone person households (15.8%), group households (1.1%), and other household types (0.0%).
How are families structured in the area?
Among the 3,664 family households, 48.3% are couples with children, 26.3% are couples without children at home, and 7.9% are single parent families. This mix shapes local demand for schools, family services, and housing types.
How does the Castle Cove - Northbridge SA2 compare to regional household patterns?
Compared to Greater Sydney, the Castle Cove - Northbridge SA2 shows distinct household patterns. Family households are notably over-represented at 83.1% (versus 72.6% regionally). Conversely, lone person households are under-represented at 15.8% compared to the regional 23.2%. This family-oriented profile influences local demand for family homes, schools, and children's services.
What is the average family size?
Families in the Castle Cove - Northbridge SA2 have an average of 1.6 children, slightly above the Greater Sydney average of 1.5. This influences local demand for child-related services and larger family homes.
What are the marriage patterns in the Castle Cove - Northbridge SA2?
Marriage patterns reveal 60.7% of the adult population are currently married, while 27.2% have never married. This compares to 48.3% married and 36.4% never married across Greater Sydney.
How significant are single-person households?
Single-person households represent 15.8% of all households in the Castle Cove - Northbridge SA2, notably lower than the regional average of 23.2%. This affects demand for smaller dwellings and single-person accommodation.
Are shared living arrangements common?
Group households (unrelated people sharing) account for 1.1% of households, well below the Greater Sydney average of 4.2%. This low rate suggests limited student or young professional shared accommodation.
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EducationSchools & Education in Castle Cove - Northbridge

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57.1% of adults in Castle Cove - Northbridge hold a university qualification, including 36.1% with a bachelor degree and 17.1% with postgraduate qualifications, higher than 95% of areas nationally. A further 7.1% hold a vocational qualification. 7 schools serve the area, with 1,252 enrolment places and an average ICSEA of 1,163 against a national benchmark of 1,000. Qualifications come from the 2021 Census; school enrolments, ICSEA and results come from ACARA's current release.

Detail

Educational qualifications in Castle Cove - Northbridge are high, with 57.1% of residents aged 15 and over holding a university degree, compared to 30.4% nationally and 32.2% across NSW. This high level of tertiary education suggests strong positioning for knowledge-sector roles. Bachelor degrees are the most common qualification at 36.1%, followed by postgraduate degrees at 17.1% and graduate diplomas at 3.9%. Vocational qualifications are held by 16.7% of the population aged 15 and over, comprising advanced diplomas at 9.6% and certificates at 7.1%. Enrollment in education is high, with 33.6% of residents currently studying.

This group is composed of 11.7% in secondary school, 11.0% in primary school, and 6.8% in higher education.

Frequently Asked Questions - Education

What percentage of people in the Castle Cove - Northbridge SA2 have university qualifications?
57.1% of people aged 15 and over in the Castle Cove - Northbridge SA2 have university qualifications, compared to 38.0% in the broader region.
What percentage of people in the Castle Cove - Northbridge SA2 have no formal qualifications?
26.2% of people aged 15 and over in the Castle Cove - Northbridge SA2 have no formal qualifications, compared to 34.2% regionally.
How does the Castle Cove - Northbridge SA2's education level compare to national averages?
The castle cove - northbridge sa2 ranks in the 95th percentile nationally for education based on AreaSearch's analysis of qualification and performance metrics.
What types of qualifications are most common in the Castle Cove - Northbridge SA2?
The most common qualifications in the Castle Cove - Northbridge SA2 are: Bachelor Degree (36.1%), Postgraduate (17.1%), Advanced Diploma (9.6%).
What proportion of the Castle Cove - Northbridge SA2's population is currently attending educational institutions?
33.6% of the population in the Castle Cove - Northbridge SA2 is currently engaged in formal education, with 11.0% in primary school, 11.7% in secondary school, 6.8% at university.
What is the ICSEA score for schools in the Castle Cove - Northbridge SA2?
The average ICSEA (Index of Community Socio-Educational Advantage) score for schools in the Castle Cove - Northbridge SA2 is 1163, indicating above-average socio-educational advantage compared to the national average of 1000.
How many schools are located within the Castle Cove - Northbridge SA2?
There are 7 schools within the Castle Cove - Northbridge SA2, with a combined enrollment of approximately 1,252 students.
What types of schools are available in the Castle Cove - Northbridge SA2?
The castle cove - northbridge sa2 includes 5 primary schools, 2 combined schools.

Schools Detail

AmenitiesServices & Amenities in Castle Cove - Northbridge

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Explore the surrounds Search this catchment for any place type — schools, cafés, supermarkets, transport — and drop your own custom points on the map.
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Getting AroundTransport & Commuting in Castle Cove - Northbridge

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Public transport in Castle Cove - Northbridge reaches 115 stops on 58 routes, timetabled for about 3,600 services a week. The typical home sits about 150 m from its nearest stop. Buses carry the largest share of public transport commuters. Households keep an average of 1.6 vehicles. Stop and service counts are built from operators' published GTFS timetables and refresh with each timetable release; vehicle ownership is from the 2021 Census.

Detail

Public transport options include 115 active bus stops in Castle Cove - Northbridge, serviced by 58 separate routes that combine to run 3,601 weekly passenger services. Accessibility is high, with the average distance to the nearest stop being 151 meters. Due to the residential nature of the suburb, most workers commute out of the area, with private vehicles remaining the primary mode of travel at 80%, followed by bus transit at 7% and walking at 5%. Average vehicle ownership is 1.6 per household, which is higher than the regional average.

Census data from 2021 showed that 64.8% of residents worked from home, which may reflect pandemic-era conditions. Bus services average 514 trips per day across all routes, representing approximately 31 weekly trips for each stop. The accompanying map displays the 100 closest stops relative to the center of the suburb.

Frequently Asked Questions - Transport

How many public transport stops are in Castle Cove - Northbridge?
There are 115 public transport stops within the Castle Cove - Northbridge SA2.
How frequent are the transport services in Castle Cove - Northbridge?
the Castle Cove - Northbridge SA2 has 3,601 weekly trips across 58 routes, averaging 514 trips per day.
How far are residents from public transport in Castle Cove - Northbridge?
On average, residential properties are 151 meters from the nearest transport stop.

Transport Stops Detail

HealthcareHealth Services in Castle Cove - Northbridge

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76.0% of residents in Castle Cove - Northbridge report no long-term health condition, a healthier profile than 97% of areas nationally. 3.9% need daily assistance with core activities, and 90.7% hold private health cover. The standardised death rate runs at 3.8 per 1,000 residents. Health conditions, assistance needs and insurance are 2021 Census measures; the death rate comes from current ABS releases.

Detail

Health data shows positive results for Castle Cove - Northbridge, with low rates of chronic illness across all age groups and private health insurance coverage held by approximately 91% of the population (12,361 people). This compares to coverage rates of 59.9% in Greater Sydney and a national average of 55.7%. Arthritis and asthma are the most common medical conditions, affecting 6.4% and 6.2% of residents respectively, while 76.0% of the population reported having no chronic health issues, compared to 74.6% in Greater Sydney. Residents aged 65 and over make up 22.5% of the population (3,065 people), which is higher than the Greater Sydney average of 15.5%.

Senior health metrics are positive, matching trends seen in the wider population.

Frequently Asked Questions - Health

How many people in the Castle Cove - Northbridge SA2 have private health insurance?
Around 90.7% of people in the Castle Cove - Northbridge SA2 are covered by private health insurance, which compares to 59.9% in the broader region of Greater Sydney.
What percentage of the population requires ongoing medical assistance in the Castle Cove - Northbridge SA2?
In the Castle Cove - Northbridge SA2, 3.9% of the population is identified as requiring ongoing medical assistance. This figure is slightly different from the regional average, where 5.2% of people in Greater Sydney require similar assistance.
How prevalent is asthma in the Castle Cove - Northbridge SA2?
6.2% of people in the Castle Cove - Northbridge SA2 are diagnosed with asthma. In comparison, 6.4% of the population across Greater Sydney is affected by asthma.
What percentage of people have diabetes in the Castle Cove - Northbridge SA2?
Diabetes affects 2.5% of the the Castle Cove - Northbridge SA2 population, while in the surrounding region, 4.3% of people are diagnosed with diabetes.
What is the percentage of people with heart disease in the Castle Cove - Northbridge SA2?
3.3% of people in the Castle Cove - Northbridge SA2 have heart disease. Across the region of Greater Sydney, 3.2% of the population is affected by heart disease.
How does the Castle Cove - Northbridge SA2 compare to the region in terms of overall private health coverage?
In the Castle Cove - Northbridge SA2, 90.7% of the population are estimated to have private health insurance. Comparatively, Greater Sydney sees an estimated private health coverage rate of 59.9%.

Ancestry & LanguageCultural Diversity in Castle Cove - Northbridge

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33.2% of Castle Cove - Northbridge residents were born overseas and 22.6% speak a language other than English at home. The largest reported ancestries are English (24.4%) and Australian (20.1%). Ancestry, language and country of birth are counted only by the Census, so these are 2021 figures.

Detail

Castle Cove - Northbridge displays higher levels of cultural diversity than most locations, with 22.6% of the population speaking a non-English language at home and 33.2% born outside of Australia. Christianity is the most common religious affiliation, representing 52.4% of the population. Judaism is also represented, accounting for 2.0% of residents compared to the Greater Sydney average of 0.8%. The three most common ancestral backgrounds are English at 24.4% of the population (compared to the regional average of 19.0%), Australian at 20.1%, and Chinese at 10.8%. Other ancestral groups show higher representation than the regional average, including Hungarian at 0.7% (compared to 0.3% regionally), French at 0.9% (compared to 0.5% regionally), and Russian at 0.6% (compared to 0.4% regionally).

Frequently Asked Questions - Diversity

What is the level of cultural diversity in the Castle Cove - Northbridge SA2?
Castle Cove - Northbridge was found to be more culturally diverse than the vast majority of local markets, with 22.6% of its population speaking a language other than English at home and 33.2% born overseas.
What is the most common religion in the Castle Cove - Northbridge SA2?
The main religion in Castle Cove - Northbridge was found to be Christianity, which makes up 52.4% of people in Castle Cove - Northbridge. However, the most apparent overrepresentation was in Judaism, which comprises 2.0% of the population, compared to 0.8% across Greater Sydney.
What are the top countries of origin in the Castle Cove - Northbridge SA2?
In terms of ancestry (country of birth of parents), the top three represented groups in Castle Cove - Northbridge are English, comprising 24.4% of the population, which is substantially higher than the regional average of 19.0%, Australian, comprising 20.1% of the population, and Chinese, comprising 10.8% of the population. Additionally, there are notable divergences in the representation of certain other ethnic groups: Hungarian is notably overrepresented at 0.7% of Castle Cove - Northbridge (vs 0.3% regionally), French at 0.9% (vs 0.5%) and Russian at 0.6% (vs 0.4%).
How does the percentage of people born overseas compare to the regional average?
33.2% of the the Castle Cove - Northbridge SA2 population was born overseas, compared to 40.5% regionally.
What percentage of the the Castle Cove - Northbridge SA2 population speaks a language other than English at home?
22.6% of the population in the Castle Cove - Northbridge SA2 speaks a language other than English at home, compared to 39.5% in the wider region.
How many people in the Castle Cove - Northbridge SA2 identify as Australian Aboriginal?
0.2% of the the Castle Cove - Northbridge SA2 population identifies as Australian Aboriginal, compared to 1.3% in the region.
What is the citizenship status of the population in the Castle Cove - Northbridge SA2?
89.7% of the the Castle Cove - Northbridge SA2 population holds citizenship, compared to 80.8% in the wider region.

Age StructureAge Profile of Castle Cove - Northbridge

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The median resident of Castle Cove - Northbridge is 45, older than 78% of areas nationally. 21.8% of residents are aged 15 to 34. Age cohorts are not raw Census counts: the Census split is re-based to the latest ABS population estimates and state projections.

Detail

The median age of 45 in Castle Cove - Northbridge is older than the Greater Sydney average of 37 and the national average of 38. The area has a high concentration of residents aged 55 - 64 at 14.1%, but a lower share of people aged 25 - 34 at 5.5%. Since the 2021 Census, the 15 to 24 age bracket has risen from 13.2% to 16.2% of the population, and the 75 to 84 cohort has increased from 6.4% to 8.1%. Conversely, the 5 to 14 cohort declined from 16.0% to 13.6% and the 35 to 44 age bracket fell from 10.9% to 9.5%.

Projections to 2041 point to shifts in the local age structure, with the 85+ cohort expected to grow by 101% (484 people) to reach 966, up from 481. The 65 and over cohorts are projected to account for 71% of overall population growth. In contrast, the 35 to 44 and 0 to 4 brackets are expected to contract.

Frequently Asked Questions - Age

What is the median age in the Castle Cove - Northbridge SA2?
According to the latest data, the median age in the Castle Cove - Northbridge SA2 is 45 years.
How does the Castle Cove - Northbridge SA2's median age compare to broader areas?
At 45 years, Castle Cove - Northbridge is 8 years older than the Greater Sydney average (37 years) and 7 years older than the national average (38 years).
What age groups are over-represented in the Castle Cove - Northbridge SA2?
The most over-represented age group in the Castle Cove - Northbridge SA2 compared to the Greater Sydney region is the 55 - 64 group, making up 14.1% of the population.
What age groups are under-represented in the Castle Cove - Northbridge SA2?
The most under-represented age group in the Castle Cove - Northbridge SA2 compared to the Greater Sydney region is the 25 - 34 group, making up 5.5% of the population.
Are there age groups with notable population variances?
Yes, certain age groups in the Castle Cove - Northbridge SA2 show significant variance compared to the Greater Sydney region. The most over-represented age groups are 85+ year-olds (3.5% vs 2.1%) and 75-84 year-olds (8.1% vs 5.3%). The most under-represented age groups are 25-34 year-olds (5.5% vs 16.1%) and 0-4 year-olds (2.9% vs 5.6%).
What is the percentage of children (0-14 years) in the Castle Cove - Northbridge SA2?
The percentage of children aged 0-14 years in the Castle Cove - Northbridge SA2 is 16.5%.
What is the percentage of older people (65+ years) in the Castle Cove - Northbridge SA2?
The percentage of people aged 65 and over in the Castle Cove - Northbridge SA2 is 22.5%.

Data & MethodBoundaries, Sources & Method for Castle Cove - Northbridge

Data currency Refreshed

9 of 14 data sections on this page were updated within the last 12 months — the newest current to Aug 2026.

Everything is aggregated to the SA2 boundary shown above, on a 2021 Census baseline. Only 3 sections — housing, households and cultural diversity — still wait on the 2026 Census.

The ledger — source, cycle and currency by section

Section Source & update cycle Currency
Updated within the last 12 months 9 sections
Population ABS, GNAF, Geoscience Australia Annual (ABS ERP) May 2026 3 months ago headline measures · 2021 Census baseline
Re-based to the ABS Estimated Resident Population (June 2025 release) and updated with new dwellings from GNAF address data. Current to May 2026, with the 2021 Census supplying the small-area baseline.
Age profile ABS, Geoscience Australia, State governments Annual May 2026 3 months ago headline measures · 2021 Census baseline
Age cohorts are re-based to the latest ABS population estimates and state projections, current to May 2026. Each cohort is held as a Census baseline and a current estimate.
Development & approvals ABS, GNAF Monthly (ABS approvals) Jun 2026 2 months ago headline measures · May 2026 baseline
Property sales & rents Valuer General, Rental Board, ABS Weekly sales, quarterly rents Aug 2026 this month all 21 measures
Sales from the state Valuer General register, refreshed weekly, and rents from quarterly rental bond lodgements. Both are read live each time this page loads, current to Aug 2026.
Infrastructure projects Infrastructure Australia, State agencies, Local governments Daily Jul 2026 last month all 2 projects tracked here
Project pipeline maintained continuously from Infrastructure Australia, state agencies, local government and public announcements. Records are added and revised daily; this area was last updated Jul 2026.
Employment ABS, DEWR, JSA Quarterly (ABS SALM) Mar 2026 5 months ago headline measures · 2021 Census baseline
Unemployment and labour force from ABS Small Area Labour Markets, current to Mar 2026. The growth outlook applies Department of Employment (now Jobs and Skills Australia) forecasts for all 19 industry divisions to the local industry mix, so it measures sector composition rather than local expansion and makes no allowance for population growth. Job demand comes from the same agency via its Internet Vacancy Index; industry and occupation structure from the 2021 Census.
Education ABS, ACARA Annual (ACARA) Aug 2026 this month headline measures · 2021 Census baseline
Transport ABS, State Transport Departments Each timetable release Jul 2026 last month headline measures · 2021 Census baseline
Services & amenities Provider directories, ACECQA Continuous Jul 2026 last month all 14 measures
Annual and financial-year sources 2 sections
Income ABS, ATO Annual (ATO) FY 2023 3 years ago headline measures · 2021 Census baseline
ATO taxable income statistics for FY 2023, indexed forward using the Wage Price Index. Census household income provides the distribution detail.
Health ABS, ATO Annual 2024 2 years ago headline measures · 2021 Census baseline
Census-measured — next update: 2026 Census 3 sections No more current small-area source exists for these, so they are labelled as Census-measured rather than implied to be current.
Housing ABS 5-yearly (Census) 2021 Census next update 2026 all 30 measures
Households ABS 5-yearly (Census) 2021 Census next update 2026 all 18 measures
Cultural diversity ABS, Geoscience Australia 5-yearly (Census) 2021 Census next update 2026 all 44 measures

"Currency" is the most recent release feeding that section. Where the Census supplies the structural baseline underneath a current headline figure, the row says so.

How the numbers are built

Population

The Census provides the small-area baseline, aggregated from mesh blocks to this boundary. It is then re-based to the ABS Estimated Resident Population (June 2025 release), and new dwellings built since Census night are counted from address data — 28 validated new addresses here. The headline figure is therefore a current estimate for May 2026, not a 2021 count (13,440 at the 2021 Census → 13,629 now). Annual growth rates are compound (CAGR), not simple averages.

Age profile

Cohort shares are not raw Census counts. Every cohort is held as a pair — the Census baseline and a current estimate — and the split is re-based using ERP and state population projections, current to May 2026. Median age is the Census median plus modelled change since. Charts that show both are labelled "2021 Census vs Current Estimate".

Property sales

Sourced from the state valuation authority's sales register — current, not Census, and refreshed weekly. Medians are calculated from settled transactions in the period shown; periods with very low transaction counts are flagged or suppressed, because a handful of sales can move a median substantially.

Rents

Derived from state rental bond lodgement data, by dwelling type and bedroom count. Bonds are lodged at the start of a new tenancy, so this reflects new lettings, not the whole rented stock.

Development & infrastructure

Building approvals come from current ABS releases; development applications are collected from council and state planning portals; the infrastructure pipeline is compiled from Infrastructure Australia and local government sources. Applications are matched to this boundary by address or coordinates, so very recent lodgements may not yet appear.

Employment & income

Industry and occupation structure comes from the Census, but the headline labour-market indicators do not. Unemployment and labour force are derived from ABS Small Area Labour Markets (quarterly). The employment outlook applies Department of Employment forecasts for all 19 industry divisions to this area's own industry mix (the agency is now Jobs and Skills Australia), as does the Internet Vacancy Index used for job demand. Because it is weighted on industry composition alone, that outlook carries no allowance for local population growth — in fast-growing areas the real rise in local jobs will typically be higher. Income combines Census household income with ATO taxable-income statistics for FY 2023, indexed forward using the Wage Price Index.

Education, transport & amenities

School enrolments, ICSEA and performance come from ACARA's current release, not the Census. Public transport stops and service frequency are derived from GTFS timetable feeds published by state transport departments. Services and amenities are proximity and count scores built from provider directories, refreshed on their own cycle. The Census contributes only the travel-to-work and qualification measures.

Rankings and benchmarks. Where we rank this area, the comparison set is every area of the same boundary type — suburbs against suburbs, SA2s against SA2s. Benchmarks compare this area against its greater capital city region and the national figure for the same measure and period.

Limits worth knowing. Small areas carry larger error margins, and the ABS introduces small random adjustments to Census counts to protect confidentiality — so totals may not sum exactly. Estimates re-based from regional data describe the area's expected trajectory, not a direct count of it. Figures are indicative for research and are not financial, planning or valuation advice.

Cross-check us. The Census baseline for this boundary is at ABS 2021 Census QuickStats (121011683). QuickStats reports 2021 only — the figures on this page are more current wherever the ledger shows a later date.

Common questions about this page

Why can the Castle Cove - Northbridge SA2 boundary differ from the suburb boundary?
This page uses ABS Statistical Area Level 2 (SA2) boundaries for statistical reporting (e.g., census and ERP). SA2 areas can differ materially from Suburbs and Localities (SAL) boundaries, even when they share similar names, because they are defined for different purposes and often use different geographic boundaries.
Where does the data on this Castle Cove - Northbridge page come from?
AreaSearch compiles this page from official and industry sources — including ABS, Geoscience Australia, Valuer General, Provider directories, DEWR, JSA, State Transport Departments and ACARA — then aggregates them to the boundary shown and calculates the rankings, growth rates and benchmarks itself. Property sales come from the state valuation authority, rents from state rental bond lodgements, development applications from council and state planning portals, school data from ACARA, and public transport from state transport departments.
Is the Castle Cove - Northbridge data on this page just from the 2021 Census?
No. Most of this page is maintained well beyond the Census. Sourced entirely from current releases: development & approvals (Jun 2026), property sales & rents (Aug 2026), infrastructure projects (Jul 2026) and services & amenities (Jul 2026). Built on a Census baseline but carrying newer measures on top: population (to May 2026), age profile (to May 2026), employment (to Mar 2026), income (to FY 2023), education (to Aug 2026), transport (to Jul 2026) and health (to 2024). Population and age cohorts in particular are re-based to the latest ABS Estimated Resident Population rather than left at 2021 counts. Only housing, households and cultural diversity remain wholly Census-based, because no more current small-area dataset exists for those measures.

Nearby Areas