Castle Cove

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

As of Feb 2026, Castle Cove's population is estimated at around 2,682. This reflects an increase of 39 people since the 2021 Census, which reported a population of 2,643. The change was inferred from AreaSearch's estimate of 2,676 residents following examination of ABS' latest ERP data release (June 2024) and validation of 14 new addresses since the Census date. This level of population equates to a density ratio of 1,146 persons per square kilometer. Population growth was primarily driven by overseas migration.

AreaSearch adopts ABS/Geoscience Australia projections for each SA2 area, released in 2024 with 2022 as the base year. For areas not covered, NSW State Government's SA2 level projections are used, released in 2022 with 2021 as the base year. Growth rates by age group from these aggregations are applied to all areas for years 2032 to 2041. Future population trends indicate lower quartile growth, with Castle Cove expected to increase by 7 persons to 2041 based on aggregated SA2-level projections, reflecting an increase of 0.0% in total over the 17 years.

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

AreaSearch analysis of ABS building approval numbers for Castle Cove shows an average of around 14 new dwelling approvals per year over the past five financial years, totalling approximately 72 homes. As of FY-26, 18 approvals have been recorded. Despite a falling population during this period, development activity has been adequate relative to population changes, which could be positive for buyers. The average expected construction cost value for new properties is $1,352,000, indicating developers focus on the premium market with high-end developments.

This financial year has seen $508,000 in commercial approvals, reflecting the area's residential nature. Compared to Greater Sydney, Castle Cove shows 15.0% lower construction activity per person, and it ranks among the 43rd percentile of areas assessed nationally, suggesting limited buyer options while strengthening demand for established properties. Recent construction comprises 50.0% detached dwellings and 50.0% attached dwellings, offering affordable entry pathways and attracting downsizers, investors, and first-time purchasers. This marks a significant shift from existing housing patterns (currently 91.0% houses), potentially due to diminishing developable land availability and evolving lifestyle preferences. The location has approximately 382 people per dwelling approval, reflecting an established area.

Population forecasts indicate Castle Cove will gain 1 resident by 2041, based on the latest AreaSearch quarterly estimate. Given current development patterns, new housing supply should meet demand, offering good conditions for buyers and potentially facilitating population growth beyond current projections.

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

No changes can significantly affect a region's performance like alterations to local infrastructure, major projects, and planning initiatives. A total of zero projects have been identified by AreaSearch that could potentially impact the area. Notable projects include Heart Of Willoughby, Sydney Metro City & Southwest, Beaches Link Tunnel, and Northern Beaches Housing Reforms Implementation, with the following list detailing those most likely to be relevant.

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The employment environment in Castle Cove shows above-average strength when compared nationally

Castle Cove has a highly educated workforce. The technology sector is particularly well-represented. The unemployment rate is 3.1%.

Employment growth over the past year is estimated at 0.9%, based on AreaSearch's aggregation of statistical area data. As of December 2025, 1,296 residents are employed while the unemployment rate is 1.0% lower than Greater Sydney's rate of 4.2%. Workforce participation in Castle Cove lags behind Greater Sydney at 60.3%, compared to 70.2%. According to Census responses, 61.0% of residents work from home, though Covid-19 lockdown impacts should be considered.

Leading employment industries among residents include professional & technical services, finance & insurance, and health care & social assistance. The area has a notable concentration in professional & technical services, with employment levels at 1.9 times the regional average. However, public administration & safety is under-represented, with only 2.4% of Castle Cove's workforce compared to Greater Sydney's 5.7%. The predominantly residential area appears to offer limited local employment opportunities, as indicated by the count of Census working population versus resident population. Over a 12-month period ending in May-25, employment increased by 0.9% alongside labour force growth of 1.3%, causing the unemployment rate to rise by 0.4 percentage points. In contrast, Greater Sydney experienced employment growth of 2.2% and labour force growth of 2.3%. National employment forecasts from Jobs and Skills Australia suggest that over five years, national employment is forecast to expand by 6.6% and by 13.7% over ten years. Applying these projections to Castle Cove's employment mix suggests local employment should increase by 7.5% over five years and 14.8% over ten years, though these are simple extrapolations for illustrative purposes and do not account for 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 ATO data released for financial year ended June 2023, Castle Cove had a median taxpayer income of $68,783 and an average income of $162,075. Nationally, the median was $60,817 and the average was $83,003. By September 2025, estimated incomes would be approximately $74,877 (median) and $176,435 (average), based on an 8.86% Wage Price Index growth since June 2023. Census 2021 data ranks Castle Cove's household, family, and personal incomes between the 92nd and 99th percentiles nationally. Income distribution shows 42.3% of residents earning over $4,000 annually, contrasting with the broader area where the $1,500 - $2,999 bracket leads at 30.9%. Economic strength is evident with 54.6% of households earning over $3,000 weekly. After housing costs, residents retain 86.9% of income, indicating strong purchasing power. The area's SEIFA income ranking places it in the 10th decile.

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

In Castle Cove, as per the latest Census evaluation, 90.6% of dwellings were houses with the remaining 9.4% comprising semi-detached homes, apartments, and other types. This contrasts with Sydney metropolitan areas where 55.9% of dwellings are houses and 44.1% are other types. Home ownership in Castle Cove stood at 52.1%, with mortgaged properties at 35.9% and rented dwellings at 12%. The median monthly mortgage repayment in the area was $4,000, higher than Sydney's average of $2,427. Weekly rent median was recorded at $1,000 compared to Sydney's $470. Nationally, Castle Cove's mortgage repayments were significantly higher than the Australian average of $1,863, and rents were substantially above the national figure of $375.

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

Family households comprise 83.5% of all households, including 48.7% couples with children, 26.0% couples without children, and 7.9% single parent families. Non-family households account for 16.5%, with lone person households at 15.6% and group households making up 1.4%. The median household size is 2.9 people, larger than the Greater Sydney average of 2.7.

Castle Cove 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's educational attainment notably exceeds broader benchmarks. Among residents aged 15+, 53.8% hold university qualifications, compared to Australia's 30.4% and NSW's 32.2%. Bachelor degrees are most prevalent at 34.0%, followed by postgraduate qualifications (15.9%) and graduate diplomas (3.9%). Vocational pathways account for 20.3%, with advanced diplomas at 11.3% and certificates at 9.0%.

Educational participation is high, with 33.5% currently enrolled in formal education: primary (11.5%), secondary (11.0%), and tertiary (6.5%).

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

Castle Cove has 31 active public transport stops, all of which are bus stops. These stops are served by 27 different routes that together facilitate 2,580 weekly passenger trips. The area's transport accessibility is rated as excellent, with residents typically located just 171 meters from the nearest stop. As a predominantly residential area, most Castle Cove residents commute outside of it. Cars remain the primary mode of transportation, used by 86% of residents, while only 4% walk to their destinations. On average, there are 1.7 vehicles per dwelling in Castle Cove, which is higher than the regional average.

According to the 2021 Census, a significant 61.0% of residents work from home, potentially due to COVID-19 conditions. Across all routes, service frequency averages 368 trips per day, equating to approximately 83 weekly trips per individual stop.

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

Castle Cove's health outcomes show excellent results based on AreaSearch's assessment. 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 (2,430 people), compared to Greater Sydney's 59.9% and the national average of 55.7%.

The most common medical conditions are arthritis (7.0%) and asthma (6.3%). 75.1% of residents declare themselves completely clear of medical ailments, compared to Greater Sydney's 74.6%. Castle Cove has 25.5% of residents aged 65 and over (683 people), higher than Greater Sydney's 15.4%. Health outcomes among seniors are strong and rank broadly in line with the general population nationally.

Castle Cove was found to be more culturally diverse than the vast majority of local markets in Australia, upon assessment of a range of language and cultural background related metrics

Castle Cove's population shows high cultural diversity, with 30.5% speaking a language other than English at home and 38.7% born overseas. Christianity is the predominant religion, accounting for 52.1%. Judaism is overrepresented compared to Greater Sydney, comprising 2.3% versus 0.8%.

The top three ancestry groups are English (21.7%), Australian (18.6%), and Chinese (17.4%), which exceeds the regional average of 8.4%. Notably, Hungarian (1.0%) is overrepresented compared to the region's 0.3%, as are Russian (0.6% vs 0.4%) and French (0.8% vs 0.5%).

Castle Cove hosts an older demographic, ranking in the top quartile nationwide

The median age in Castle Cove is 46 years, which is notably higher than Greater Sydney's average age of 37 and also exceeds the Australian median age of 38. Compared to Greater Sydney, the cohort aged 75-84 is significantly over-represented in Castle Cove at 10.3%, while those aged 25-34 are under-represented at 4.4%. Between the 2021 Census and present day, the percentage of the population aged 75 to 84 has grown from 8.1% to 10.3%, while the 15 to 24 age group increased from 12.4% to 14.1%. Conversely, the 5 to 14 age cohort declined from 16.4% to 14.2%, and the 35 to 44 age group decreased from 11.1% to 9.8%. Population forecasts for Castle Cove indicate substantial demographic changes by 2041. The number of people aged 85 and above is projected to grow significantly, increasing by 115 individuals (98%) from 118 to 234. This aging population trend is evident, with those aged 65 and above comprising 86% of the projected growth. Conversely, the 35 to 44 age group and the 0 to 4 age cohort are expected to experience population declines.