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, the population of Castle Cove is estimated at around 2,682, reflecting a 1.5% increase from the 2021 Census figure of 2,643 people. This growth was inferred from AreaSearch's resident population estimate of 2,676 based on the latest ERP data release by the ABS in June 2024 and an additional 14 validated new addresses since the Census date. The population density ratio is 1,146 persons per square kilometer, aligning with averages seen across locations assessed by AreaSearch. Overseas migration was the primary driver of population growth during recent periods. AreaSearch adopts 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 are applied to all areas for years 2032 to 2041. Future population trends suggest lower quartile growth, with the suburb expected to increase by 29 persons to 2041, reflecting a total increase of 1.1% over the 17-year period.

Residential development activity is lower than average in Castle Cove according to AreaSearch's national comparison of local real estate markets

AreaSearch analysis of ABS building approval numbers shows Castle Cove averaged around 17 new dwelling approvals each year over the past 5 financial years ending FY26. This totals an estimated 88 homes. So far in FY26, 18 approvals have been recorded. Despite population decline during this period, development activity has been adequate relative to population changes, which is positive for buyers.

New properties are constructed at an average expected cost of $1,352,000, indicating a focus on the premium market with high-end developments. There have also been $508,000 in commercial approvals this financial year, reflecting the area's residential nature. Compared to Greater Sydney, Castle Cove shows comparable development activity per person, supporting market stability aligned with regional patterns. Recent construction comprises 52.0% detached dwellings and 48.0% attached dwellings, offering a mix of medium-density options across price brackets.

This marks a shift from existing housing patterns, which are currently 91.0% houses, suggesting diminishing developable land availability and responding to evolving lifestyle preferences and housing affordability needs. Castle Cove has approximately 178 people per dwelling approval, indicating a low density market. Population forecasts suggest Castle Cove will gain 29 residents 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. AreaSearch has identified zero projects that are expected to impact this 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 labour market in Castle Cove demonstrates typical performance when compared to similar areas across Australia

Castle Cove has a highly educated workforce. The technology sector is particularly well-represented. As of September 2025, the unemployment rate was 3.4%, with relative employment stability over the past year.

This is based on AreaSearch aggregation of statistical area data. In Castle Cove, 1,297 residents were in work while the unemployment rate was 0.8% below Greater Sydney's rate of 4.2%. Workforce participation lagged significantly at 60.6%, compared to Greater Sydney's 70.0%. According to Census responses, a high 61.0% of residents worked from home, though Covid-19 lockdown impacts should be considered.

Leading employment industries among Castle Cove residents comprise professional & technical services, finance & insurance, and health care & social assistance. The area demonstrates particularly notable concentration in professional & technical services, with employment levels at 1.9 times the regional average. Conversely, public administration & safety is under-represented, with only 2.4% of Castle Cove's workforce compared to 5.7% in Greater Sydney. The predominantly residential area appears to offer limited employment opportunities locally, as indicated by the count of Census working population versus resident population. Based on AreaSearch analysis of SALM and ABS data aggregated from broader statistical areas over a 12-month period, employment increased by 0.1% alongside labour force increasing by 0.7%, causing the unemployment rate to rise by 0.6 percentage points. In contrast, Greater Sydney experienced employment growth of 2.1% and labour force growth of 2.4%, with a 0.2 percentage point rise. Jobs and Skills Australia's national employment forecasts from May-25 offer further insight into potential future demand within Castle Cove. These projections, covering five and ten-year periods, have been mapped against the local employment profile to estimate growth patterns. National employment is forecast to expand by 6.6% over five years and 13.7% over ten years. Applying these industry-specific 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 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

AreaSearch reports that Castle Cove had a median taxpayer income of $68,783 and an average income of $162,075 in the financial year 2023. Nationally, these figures are exceptionally high, with Greater Sydney's median and average incomes being $60,817 and $83,003 respectively. By September 2025, estimated incomes would be approximately $74,877 (median) and $176,435 (average), based on an 8.86% growth in the Wage Price Index since financial year 2023. Census 2021 data shows Castle Cove's household, family, and personal incomes rank between the 92nd and 99th percentiles nationally. Income distribution indicates that 42.3% of residents (1,134 individuals) earn $4000+ annually, contrasting with the broader area where the $1,500 - $2,999 bracket is most prevalent at 30.9%. Economic strength is evident through 54.6% of households earning weekly incomes exceeding $3,000. After housing costs, residents retain 86.9% of their income, reflecting 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% being semi-detached, apartments, or other types. This contrasts with Sydney metro's figures of 55.9% houses and 44.1% other dwellings. Home ownership in Castle Cove stood at 52.1%, with mortgaged properties making up 35.9% and rented dwellings comprising 12.0%. The median monthly mortgage repayment in the area was $4,000, surpassing Sydney metro's average of $2,427. Meanwhile, the median weekly rent in Castle Cove was $1,000, higher than Sydney metro's figure of $470. Nationally, Castle Cove's mortgage repayments were significantly higher than the Australian average of $1,863, while 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 account for 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 constitute the remaining 16.5%, comprising 15.6% lone person households and 1.4% group households. The median household size is 2.9 people, which is 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 exceeds national averages: 53.8% of residents aged 15+ have university qualifications, compared to Australia's 30.4% and NSW's 32.2%. Bachelor degrees are the most common (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: 11.5% in primary, 11.0% in secondary, and 6.5% in tertiary education.

Educational participation is notably high, with 33.5% of residents currently enrolled in formal education. This includes 11.5% in primary education, 11.0% in secondary education, and 6.5% pursuing tertiary education.

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 collectively facilitate 2,580 weekly passenger trips. The area's transport accessibility is rated as excellent, with residents on average being located just 171 meters from the nearest transport stop. As a predominantly residential area, most residents commute outward. Cars remain the primary mode of transportation, used by 86% of residents, while walking accounts for 4%. 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. The service frequency across all routes 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

Health outcomes data shows excellent results across Castle Cove, 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. Private health cover is exceptionally high at approximately 91% of the total population (2,430 people), compared to 59.9% in Greater Sydney and the national average of 55.7%.

The most prevalent medical conditions are arthritis and asthma, affecting 7.0 and 6.3% of residents respectively. A total of 75.1% of residents declare themselves completely clear of medical ailments, compared to 74.6% in Greater Sydney. Castle Cove has 25.1% of residents aged 65 and over (673 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.

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 has a high level of cultural diversity, with 30.5% of its population speaking a language other than English at home and 38.7% born overseas. The dominant religion is Christianity, comprising 52.1% of Castle Cove's population. Notably, Judaism is overrepresented in Castle Cove, making up 2.3%, compared to the regional average of 0.8%.

Regarding ancestry, the top three groups are English (21.7%), Australian (18.6%), and Chinese (17.4%), which exceeds Greater Sydney's average of 8.4%. Some ethnic groups show significant differences: Hungarian is overrepresented at 1.0% in Castle Cove versus 0.3% regionally, Russian at 0.6% compared to 0.4%, and French at 0.8% versus 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 of 37 years and also exceeds the Australian median of 38 years. The 75-84 age cohort is significantly over-represented in Castle Cove at 10.1%, compared to the Greater Sydney average. Conversely, the 25-34 age group is under-represented at 4.4%. Between the 2021 Census and the present, the 15-24 age group has grown from 12.4% to 14.9%, while the 75-84 cohort increased from 8.1% to 10.1%. Meanwhile, the 5-14 age group has declined from 16.4% to 14.0%, and the 35-44 age group has decreased from 11.1% to 9.6%. Population forecasts for Castle Cove indicate substantial demographic changes by 2041. The 85+ age cohort is projected to increase dramatically, with an expansion of 115 people (100%) from 115 to 231. The aging population trend is evident, with those aged 65 and above comprising 76% of the projected growth. Conversely, the 35-44 and 0-4 age cohorts are expected to experience population declines.