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 13,594 as of Feb 2026. This reflects an increase of 154 people (1.1%) 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 28 validated new addresses since the Census date. This population level equates to a density ratio of 1,770 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, which was essentially the sole driver of population gains during recent periods.

AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, as released in 2024 with 2022 as the base year. 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 2021 as the base year. Growth rates by age group from these aggregations are also applied to all areas for years 2032 to 2041. Projections indicate a decline in overall population over this period, 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. See the age section for more details.

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 around 34 new homes approved each year, with 171 homes approved over the past 5 financial years (between FY-21 and FY-25) and 62 so far in FY-26. Given population has fallen over the past period, new supply has likely been keeping up with demand, offering good choice to buyers, while new dwellings are developed at an average value of $1,242,000, showing that developers are focusing on the premium market with high-end developments. Additionally, $653,000 in commercial approvals have been registered this financial year, indicating minimal commercial development activity.

Relative to Greater Sydney, Castle Cove - Northbridge records markedly lower building activity (60.0% below regional average per person). This scarcity of new homes typically strengthens demand and prices for existing properties. This activity is also below average nationally, reflecting the area's maturity and pointing to possible planning constraints. New building activity shows 55.0% detached houses and 45.0% medium and high-density housing, featuring an increasing blend of attached housing types offering choices across price ranges, from spacious family homes to more accessible compact options. This represents a notable shift from the area's existing housing (currently 84.0% houses), indicating decreasing availability of developable sites and reflecting changing lifestyles and the need for more diverse, affordable housing options. With around 363 people per dwelling approval, Castle Cove - Northbridge shows a developed market.

With population projections showing stability or decline, Castle Cove - Northbridge should see reduced housing demand pressures, benefiting potential buyers.

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

Nothing can influence an area's performance as much as changes to local infrastructure, major projects, and planning initiatives. In total 39 projects have been identified by AreaSearch that are likely to have an impact on the area. Key projects include Northbridge Public School Upgrade, Flo Northbridge by WINIM, Aurora Willoughby, and Cammeray Golf Club Redevelopment, with the list below detailing those likely to be of most relevance.

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 possesses a highly educated workforce, with the technology sector a particular standout in terms of representation, an unemployment rate of just 2.8%, and 0.7% in estimated employment growth over the past year. As of December 2025, 6,850 residents are in work while the unemployment rate is 1.4% below Greater Sydney's rate of 4.2%, and workforce participation lags significantly (62.6% compared to Greater Sydney's 70.2%). Based on Census responses, a high 64.8% of residents were found to work from home, though Covid-19 lockdown impacts should be considered.

Leading employment industries among residents comprise professional & technical, finance & insurance, and health care & social assistance. The area shows particularly strong specialization in professional & technical, with an employment share of 1.9 times the regional level. Conversely, construction shows lower representation at 4.9% versus the regional average of 8.6%. The predominantly residential area appears to offer limited employment opportunities locally, as indicated by the count of Census working population vs resident population.

Based on AreaSearch analysis of SALM and ABS data, during the year to December 2025, employment levels increased by 0.7% and labour force increased by 1.0%, causing the unemployment rate to rise by 0.3 percentage points. In contrast, Greater Sydney experienced employment growth of 2.2% and labour force growth of 2.3%, with a marginal rise. Jobs and Skills Australia's national employment forecasts from May-25 can offer further insight into potential future demand within Castle Cove - Northbridge. These projections, covering five and ten-year periods, have been mapped against the local employment profile to estimate growth patterns. While national employment is forecast to expand by 6.6% over five years and 13.7% over ten years, growth rates differ significantly between industry sectors. Applying these industry-specific 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 (please note this is a simple weighting extrapolation for illustrative purposes and does not take into account localised population projections).

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

According to AreaSearch's aggregation of the latest postcode level ATO data released for FY-23, the Castle Cove - Northbridge SA2 had a median income among taxpayers of $77,695 with the average level standing at $173,909. This is exceptionally high nationally and compares to levels of $60,817 and $83,003 across Greater Sydney respectively. Based on Wage Price Index growth of 8.86% since FY-23, current estimates would be approximately $84,579 (median) and $189,317 (average) as of September 2025. According to 2021 Census figures, household, family and personal incomes all rank highly in Castle Cove - Northbridge, between the 96th and 99th percentiles nationally. Income analysis reveals the $4000+ bracket dominates with 49.9% of residents (6,783 people), differing from patterns across regional levels where $1,500 - 2,999 dominates with 30.9%. Economic strength emerges through 59.8% of households achieving high weekly earnings exceeding $3,000, supporting elevated consumer spending. After housing costs, residents retain 88.0% of income, reflecting strong purchasing power and 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 within Castle Cove - Northbridge, as evaluated at the latest Census, comprised 84.5% houses and 15.5% other dwellings (semi-detached, apartments, 'other' dwellings), in comparison to Sydney metro's 55.9% houses and 44.1% other dwellings. Meanwhile, the level of home ownership within Castle Cove - Northbridge was well beyond that of Sydney metro, at 49.8%, with the remainder of dwellings either mortgaged (34.8%) or rented (15.4%). The median monthly mortgage repayment in the area was well above the Sydney metro average at $4,333, while the median weekly rent figure was recorded at $850, compared to Sydney metro's $2,427 and $470. Nationally, Castle Cove - Northbridge's mortgage repayments are significantly higher than the Australian average of $1,863, while rents are 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 dominate at 83.1% of all households, comprising 48.3% couples with children, 26.3% couples without children, and 7.9% single parent families. Non-family households make up the remaining 16.9%, with lone person households at 15.8% and group households comprising 1.1% of the total. The median household size of 2.9 people is 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 significantly surpasses broader benchmarks, with 57.1% of residents aged 15+ holding university qualifications compared to 30.4% in Australia and 32.2% in NSW. This substantial educational advantage positions the area strongly for knowledge-based opportunities. Bachelor degrees lead at 36.1%, followed by postgraduate qualifications (17.1%) and graduate diplomas (3.9%). Vocational pathways account for 16.7% of qualifications among those aged 15+ - advanced diplomas (9.6%) and certificates (7.1%).

Educational participation is notably 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

Public transport analysis reveals 115 active transport stops operating within Castle Cove - Northbridge, comprising a mix of buses. These stops are serviced by 58 individual routes, collectively providing 3,601 weekly passenger trips. Transport accessibility is rated as excellent, with residents typically located 151 meters from the nearest transport stop. As a primarily residential area, most residents commute outward; the car remains the dominant mode at 80%, with 7% by bus and 5% walking. Vehicle ownership averages 1.6 per dwelling, which is above the regional average. A high 64.8% of residents work from home (2021 Census; may reflect COVID-19 conditions).

Service frequency averages 514 trips per day across all routes, equating to approximately 31 weekly trips per individual stop. The accompanying map shows the 100 nearest stops to the location 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 demonstrates outstanding results across Castle Cove - Northbridge, based on AreaSearch's assessment of mortality rates and chronic condition prevalence. There is a very low prevalence of common health conditions across all age groups, and the rate of private health cover is exceptionally high at approximately 91% of the total population (12,329 people). This compares to 59.9% across Greater Sydney and a national average of 55.7%.

The most common medical conditions in the area are arthritis and asthma, impacting 6.4% and 6.2% of residents, respectively, while 76.0% declared themselves as 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), which is 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 is 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. The main religion in Castle Cove - Northbridge is Christianity, which makes up 52.4% of the population. However, the most apparent overrepresentation is in Judaism, which comprises 2.0% of the population, compared to 0.8% across Greater Sydney.

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%).

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

The 45-year median age in Castle Cove - Northbridge is significantly above Greater Sydney's average of 37 and similarly considerably older than Australia's 38 years. Relative to Greater Sydney, Castle Cove - Northbridge has a higher concentration of 55 - 64 residents (14.2%) but fewer 25 - 34 year-olds (4.5%). Following the 2021 Census, the 15 to 24 age group has grown from 13.2% to 16.4% of the population, while the 75 to 84 cohort increased from 6.4% to 8.2%. Conversely, the 5 to 14 cohort has declined from 16.0% to 13.9% and the 35 to 44 group dropped from 10.9% to 9.5%. Looking ahead to 2041, demographic projections reveal significant shifts in Castle Cove - Northbridge's age structure. Leading the demographic shift, the 85+ group will grow by 100% (517 people), reaching 1,033 from 515. Notably, the combined 65+ age groups will account for 72% of total population growth, reflecting the area's aging demographic profile. In contrast, both 35 to 44 and 0 to 4 age groups will see reduced numbers.