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

Based on AreaSearch's analysis, Castle Cove - Northbridge's population is around 13,568 as of November 2025. This reflects an increase of 128 people since the 2021 Census, which reported a population of 13,440 people. The change is inferred from the estimated resident population of 13,563 from the ABS as of June 2024 and an additional 17 validated new addresses since the Census date. This level of population equates to a density ratio of 1,766 persons per square kilometer, which is above the average seen across national locations assessed by AreaSearch. Population growth for the area was primarily driven by overseas migration during recent periods.

AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, as released in 2024 with a base year of 2022. For any SA2 areas not covered by this data, AreaSearch is utilising the NSW State Government's SA2 level projections, as released in 2022 with a base year of 2021. Growth rates by age group from these aggregations are applied to all areas for years 2032 to 2041. Over this period, projections indicate a decline in overall population, with the area's population expected to shrink by 48 persons by 2041 according to this methodology. However, growth across specific age cohorts is anticipated, led by the 85 and over age group, which is projected to expand 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 FY21 to FY25, around 171 homes were approved, with a further 60 approved so far in FY26. Despite population decline during this period, new supply appears to have kept pace with demand, offering good choice for buyers.

The average expected construction cost of new dwellings is $1,242,000, indicating developers focus on the premium market with high-end developments. In FY26, commercial approvals registered totalled $653,000, suggesting minimal commercial development activity in the area. Compared to Greater Sydney, Castle Cove - Northbridge records significantly lower building activity, 60.0% below the regional average per person. This scarcity typically strengthens demand and prices for existing properties. Nationally, this activity is also below average, reflecting the area's maturity and possible planning constraints. New building activity comprises 55.0% detached houses and 45.0% medium to high-density housing, featuring an increasing blend of attached housing types offering choices across price ranges.

This represents a notable shift from the area's existing housing composition, currently at 84.0% houses. Around 363 people per dwelling approval indicates a developed market in Castle Cove - Northbridge. With population projections showing stability or decline, reduced housing demand pressures are expected, 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 identified 39 projects likely impacting the area. Notable projects include Northbridge Public School Upgrade, Flo Northbridge by WINIM, Aurora Willoughby, and Cammeray Golf Club Redevelopment. The following list details those 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. Its unemployment rate is 3.0%. Employment stability has been relatively consistent over the past year.

As of September 2025, 6,856 residents are employed, with an unemployment rate of 1.2% lower than Greater Sydney's rate of 4.2%. Workforce participation in Castle Cove - Northbridge is 63.1%, compared to Greater Sydney's 70.0%. According to Census responses, 64.8% of residents work from home, with Covid-19 lockdown impacts considered. Leading employment industries include professional & technical, finance & insurance, and health care & social assistance.

The area has a strong specialization in professional & technical services, with an employment share 1.9 times the regional level. Conversely, construction shows lower representation at 4.9% compared to the regional average of 8.6%. Limited local employment opportunities are suggested by the count of Census working population versus resident population. Between September 2024 and September 2025, the labour force increased by 0.4%, while employment decreased by 0.1%, resulting in a rise in unemployment of 0.5 percentage points. In contrast, Greater Sydney experienced employment growth of 2.1% and labour force growth of 2.4%. National employment forecasts from Jobs and Skills Australia, published in May-25, project national employment growth of 6.6% over five years and 13.7% over ten years. Applying these projections to Castle Cove - Northbridge's employment mix suggests local employment should increase by 7.7% over five years and 15.2% over ten years, based on a simple weighting extrapolation for illustrative purposes.

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

AreaSearch's aggregation of latest postcode level ATO data for financial year 2023 shows Castle Cove - Northbridge SA2 had a median taxpayer income of $77,695 and an average income of $173,909. Nationally, these figures are exceptionally high compared to Greater Sydney's median of $60,817 and average of $83,003. Based on Wage Price Index growth of 8.86% since financial year 2023, current estimates for September 2025 would be approximately $84,579 (median) and $189,317 (average). According to 2021 Census figures, incomes in Castle Cove - Northbridge rank highly nationally, between the 96th and 99th percentiles for household, family, and personal incomes. Income analysis reveals that 49.9% of residents (6,770 people) fall into the $4000+ bracket, differing from regional patterns where the $1,500 - 2,999 bracket dominates with 30.9%. Economic strength is evident through 59.8% of households earning high weekly incomes exceeding $3,000, supporting elevated consumer spending. After housing costs, residents retain 88.0% of income, reflecting 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

Dwelling structure in Castle Cove - Northbridge, as evaluated at the latest Census held on 28 August 2016, comprised 84.5% houses and 15.5% other dwellings such as semi-detached homes, apartments, and 'other' dwellings. This compares to Sydney metropolitan area's 55.9% houses and 44.1% other dwellings. Home ownership in Castle Cove - Northbridge stood at 49.8%, with the remaining dwellings either mortgaged (34.8%) or rented (15.4%). The median monthly mortgage repayment in the area was $4,333 as of 2016, exceeding Sydney metro's average of $2,427. Median weekly rent figure for Castle Cove - Northbridge was recorded at $850, compared to Sydney metro's $470. Nationally, mortgage repayments in Castle Cove - Northbridge were significantly higher than the Australian average of $1,863, while rents were 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 account for 83.1% of all households, including 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%. 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

Educational attainment in Castle Cove - Northbridge is significantly higher than broader benchmarks. Among residents aged 15 and above, 57.1% hold university qualifications, compared to 30.4% nationally and 32.2% in NSW. Bachelor degrees are the most common at 36.1%, followed by postgraduate qualifications (17.1%) and graduate diplomas (3.9%). Vocational pathways account for 16.7% of qualifications, with advanced diplomas at 9.6% and certificates at 7.1%.

Educational participation is high, 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 serving a mix of bus routes. These stops are covered by 58 individual routes, facilitating 3,601 weekly passenger trips in total. The area's transport accessibility is rated as excellent, with residents located an average of 151 meters from the nearest stop. As a predominantly residential zone, most commuters travel outward. Car remains the primary mode of transport at 80%, followed by bus at 7% and walking at 5%. On average, there are 1.6 vehicles per dwelling, exceeding the regional norm.

According to the 2021 Census, 64.8% of residents work from home, potentially due to COVID-19 conditions. Service frequency averages 514 trips per day across all routes, translating to approximately 31 weekly trips per individual stop. The accompanying map displays 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

AreaSearch's assessment shows excellent health outcomes in Castle Cove - Northbridge. Mortality rates and chronic condition prevalence are very low across all age groups. Private health cover is exceptionally high at approximately 91% of the total population (12,306 people), compared to 59.9% in Greater Sydney and a national average of 55.7%.

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 report no medical ailments, compared to 74.6% across Greater Sydney. The area has a higher proportion of seniors aged 65 and over at 22.1% (3,001 people), compared to 15.3% in Greater Sydney. Health outcomes among seniors are strong and largely in line with the general population nationally.

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 was found to have a higher cultural diversity than most local areas, with 22.6% of its population speaking languages other than English at home and 33.2% born overseas. Christianity is the predominant religion in Castle Cove-Northbridge, making up 52.4% of its population. Notably, Judaism is overrepresented, comprising 2.0% compared to the Greater Sydney average of 0.8%.

The top three ancestry groups are English (24.4%), Australian (20.1%), and Chinese (10.8%). Some other ethnic groups also show notable differences: Hungarian at 0.7% versus 0.3% regionally, French at 0.9% versus 0.5%, and Russian at 0.6% versus 0.4%.

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

The median age in Castle Cove - Northbridge is 45 years, 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 percentage of residents aged 55-64 (14.2%) but fewer residents aged 25-34 (4.6%). According to the 2021 Census, the 15-24 age group increased from 13.2% to 16.0%, while the 75-84 age group rose from 6.4% to 7.9%. Conversely, the 5-14 age group decreased from 16.0% to 14.2% and the 35-44 age group fell from 10.9% to 9.9%. By 2041, demographic projections show significant shifts in Castle Cove - Northbridge's age structure. The 85+ age group is projected to grow by 114%, reaching 1,033 people from 481. Notably, the combined 65+ age groups will account for 76% of total population growth, reflecting the area's aging demographic profile. In contrast, both the 0-4 and 35-44 age groups are projected to decrease in numbers.