Castle Cove - Northbridge

Castle Cove - Northbridge is positioned among the lower quartile of areas assessed nationally for population growth based on AreaSearch's assessment of recent, and medium term trends

Castle Cove - Northbridge's population, as of February 2026, is approximately 13,594, reflecting a growth of 154 people since the 2021 Census which reported 13,440 inhabitants. This increase was inferred from ABS' estimated resident population of 13,563 in June 2024 and an additional 28 validated new addresses post-Census. The population density is around 1,770 persons per square kilometer, exceeding the average across national locations assessed by AreaSearch. Overseas migration primarily drove this growth. AreaSearch uses ABS/Geoscience Australia projections for each SA2 area released in 2024 with a base year of 2022.

For areas not covered, NSW State Government's SA2 level projections from 2022 with a base year of 2021 are used. Growth rates by age group from these aggregations are applied to all areas for years 2032 to 2041. By 2041, the population is projected to decrease by 48 persons overall, but specific age cohorts like the 85 and over group are expected to grow by 575 people.

AreaSearch assessment of residential development drivers sees a low level of activity in Castle Cove - Northbridge, placing the area among the bottom 25% of areas assessed nationally

Castle Cove - Northbridge has seen approximately 34 new homes approved annually. Over the past five financial years, from FY-21 to FY-25, around 171 homes were approved, with a further 60 approved in FY-26 so far. Despite population decline during this period, new supply has likely kept pace with demand, providing good options for buyers.

The average expected construction cost value of new dwellings is $1,242,000, indicating focus on the premium market and high-end developments. This financial year has seen $653,000 in commercial approvals, suggesting minimal commercial development activity. Compared to Greater Sydney, Castle Cove - Northbridge records significantly lower building activity, 60.0% below the regional average per person, which typically strengthens demand and prices for existing properties. This activity is also below national averages, reflecting the area's maturity and possible planning constraints. New building approvals consist of 55.0% detached houses and 45.0% medium and high-density housing, marking a notable shift from the area's existing housing composition (currently 84.0% houses). This change likely reflects decreasing availability of developable sites and evolving lifestyles seeking diverse, affordable housing options.

With around 363 people per dwelling approval, Castle Cove - Northbridge shows a developed market with stable or declining population projections, suggesting reduced future housing demand pressures, benefiting potential buyers.

Castle Cove - Northbridge has very high levels of nearby infrastructure activity, ranking in the top 10% nationally

Changes to local infrastructure significantly influence an area's performance. AreaSearch has identified 39 potential impact projects in total. Notable ones include Northbridge Public School Upgrade, Flo Northbridge by WINIM, Aurora Willoughby, and Cammeray Golf Club Redevelopment. The following list details those likely most relevant.

Professional plan users can use the search below to filter and access additional projects.

Denotes AI-based impression for illustrative purposes only, not to be taken as definitive under any circumstances. Please follow links and conduct other investigations from the project's source for actual imagery. Developers and project owners wishing us to use original imagery please Contact Us and we will do so.

AreaSearch assessment positions Castle Cove - Northbridge ahead of most Australian regions for employment performance

Castle Cove - Northbridge has a highly educated workforce with notable representation in the technology sector. As of September 2025, its unemployment rate is 3.0%, lower than Greater Sydney's rate of 4.2%. Over the past year, employment stability has been relatively consistent.

6,856 residents are currently employed, while workforce participation stands at 62.8%, compared to Greater Sydney's 70.0%. A significant proportion, 64.8% of residents, work from home, though Covid-19 lockdown impacts should be considered. The leading employment industries among residents include professional & technical services, finance & insurance, and health care & social assistance. Notably, the area shows strong specialization in professional & technical services with an employment share 1.9 times the regional level.

Conversely, construction has lower representation at 4.9% compared to the regional average of 8.6%. The predominantly residential area appears to offer limited local employment opportunities. Between September 2024 and September 2025, the labour force increased by 0.4%, while employment decreased by 0.1%, leading to a rise in unemployment by 0.5 percentage points. In contrast, Greater Sydney experienced employment growth of 2.1% and labour force growth of 2.4%. Jobs and Skills Australia's national employment forecasts from May-25 suggest potential future demand within Castle Cove - Northbridge. National employment is forecast to expand by 6.6% over five years and 13.7% over ten years, with industry-specific projections indicating local employment should increase by 7.7% over five years and 15.2% over ten years.

The economic profile demonstrates exceptional strength, placing the area among the top 10% nationally based on comprehensive AreaSearch income analysis

AreaSearch reports median taxpayer income in Castle Cove - Northbridge SA2 was $77,695 in financial year 2023. Average income stood at $173,909. Nationally, these figures are exceptionally high, compared to Greater Sydney's $60,817 and $83,003 respectively. With an 8.86% increase since FY2023 based on Wage Price Index growth, estimated median income by September 2025 is approximately $84,579, while average income is projected at $189,317. According to the 2021 Census, incomes in Castle Cove - Northbridge rank highly nationally, between the 96th and 99th percentiles for household, family, and personal incomes. Income analysis shows that 49.9% of residents (6,783 people) fall into the $4,000+ bracket, unlike regional levels where the $1,500 - $2,999 bracket dominates at 30.9%. Economic strength is evident with 59.8% of households earning high weekly incomes exceeding $3,000, supporting elevated consumer spending. After housing costs, residents retain 88.0% of income, indicating strong purchasing power. The area's SEIFA income ranking places it in the 10th decile.

Castle Cove - Northbridge is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership

The dwelling structure in Castle Cove - Northbridge, as per the latest Census, consisted of 84.5% houses and 15.5% other dwellings (semi-detached, apartments, 'other' dwellings), compared to Sydney metro's 55.9% houses and 44.1% other dwellings. Home ownership in Castle Cove - Northbridge stood at 49.8%, with mortgaged dwellings at 34.8% and rented ones at 15.4%. The median monthly mortgage repayment was $4,333, higher than Sydney metro's average of $2,427. The median weekly rent in the area was $850, compared to Sydney metro's $470. Nationally, Castle Cove - Northbridge's mortgage repayments were significantly higher at $1,863 and rents substantially above the national figure of $375.

Castle Cove - Northbridge features high concentrations of family households, with a higher-than-average median household size

Family households constitute 83.1% of all households, consisting of 48.3% couples with children, 26.3% couples without children, and 7.9% single parent families. Non-family households comprise the remaining 16.9%, with lone person households at 15.8% and group households making up 1.1% of the total. The median household size is 2.9 people, larger than the Greater Sydney average of 2.7.

Castle Cove - Northbridge demonstrates exceptional educational outcomes, ranking among the top 5% of areas nationally based on AreaSearch's comprehensive analysis of qualification and performance metrics

Castle Cove - Northbridge has a notably high level of educational attainment among its residents aged 15 and above, with 57.1% holding university qualifications. This figure significantly exceeds the national average of 30.4% and the state average of 32.2% in New South Wales (NSW). The area's strong educational advantage is reflected in various qualification types: Bachelor degrees are most prevalent at 36.1%, followed by postgraduate qualifications at 17.1%, and graduate diplomas at 3.9%. Vocational pathways account for 16.7% of qualifications, with advanced diplomas making up 9.6% and certificates 7.1%.

Educational participation is particularly high in the area, with 33.6% of residents currently enrolled in formal education. This includes 11.7% in secondary education, 11.0% in primary education, and 6.8% pursuing tertiary education.

Transport servicing is good compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility

Castle Cove - Northbridge has 115 active public transport stops, all of which are bus stops. These stops are served by 58 different routes that together facilitate 3,601 weekly passenger trips. The area's transport accessibility is rated as excellent, with residents typically located 151 meters from the nearest stop. As a predominantly residential area, most residents commute outward using cars, which remain the dominant mode of transportation at 80%. Seven percent use buses and five percent walk. On average, there are 1.6 vehicles per dwelling, exceeding the regional average.

According to the 2021 Census, 64.8% of residents work from home, a figure that may be influenced by COVID-19 conditions. The service frequency averages 514 trips per day across all routes, equating to approximately 31 weekly trips per individual stop. A map accompanies this data, showing the 100 nearest stops to the location's centrepoint.

Castle Cove - Northbridge's residents boast exceedingly positive health performance metrics with very low prevalence of common health conditions across all age groups

Health outcomes data shows excellent results across Castle Cove - Northbridge, based on AreaSearch's assessment of mortality rates and chronic condition prevalence. The area has a very low prevalence of common health conditions across all age groups. The rate of private health cover is exceptionally high at approximately 91% of the total population (12,329 people), compared to 59.9% across Greater Sydney and 55.7% nationally.

The most common medical conditions are arthritis and asthma, affecting 6.4 and 6.2% of residents respectively. A total of 76.0% of residents declare themselves completely clear of medical ailments, compared to 74.6% across Greater Sydney. The area has 22.9% of residents aged 65 and over (3,114 people), higher than the 15.4% in Greater Sydney. Health outcomes among seniors are particularly strong, with national rankings broadly in line with the general population.

The level of cultural diversity witnessed in Castle Cove - Northbridge was found to be above average when compared nationally for a number of language and cultural background related metrics

Castle Cove-Northbridge, compared to most local areas, has high cultural diversity: 22.6% speak a language other than English at home and 33.2% were born overseas. Christianity is the predominant religion here, with 52.4%. Judaism's representation is notably higher at 2.0%, compared to Greater Sydney's 0.8%.

The top three ancestry groups are English (24.4%), Australian (20.1%), and Chinese (10.8%). Some ethnicities have notable differences: Hungarian (0.7% vs regional 0.3%), French (0.9% vs 0.5%), and Russian (0.6% vs 0.4%) are overrepresented in Castle Cove-Northbridge.

Castle Cove - Northbridge hosts a notably older demographic compared to the national average

The median age in Castle Cove - Northbridge is 45 years, which is significantly higher than Greater Sydney's average of 37 years and Australia's national average of 38 years. Compared to Greater Sydney, Castle Cove - Northbridge has a higher proportion of residents aged 55-64 (14.2%) but fewer residents aged 25-34 (4.5%). According to the 2021 Census, the population aged 15-24 increased from 13.2% to 16.4%, while those aged 75-84 grew from 6.4% to 8.2%. Conversely, the age group of 5-14 decreased from 16.0% to 13.9%, and those aged 35-44 dropped from 10.9% to 9.5%. By 2041, demographic projections indicate significant shifts in Castle Cove - Northbridge's age structure. Notably, the number of residents aged 85 and above is projected to double (from 517 to 1,033), leading the demographic shift. The combined age groups of 65 and above will account for 72% of total population growth, reflecting the area's aging demographic profile. In contrast, both the age groups of 35-44 and 0-4 are projected to decrease in numbers.