Castle Hill - South
Statistical Area - sa2

Population growth drivers in Castle Hill - South are strong compared to national averages based on AreaSearch's ranking of recent, and medium to long-term trends

Castle Hill - South's population is approximately 10,818 as of November 2025. This figure indicates a rise of 399 individuals, representing a 3.8% increase from the 2021 Census total of 10,419 people. The change is estimated based on an ABS population of 10,787 in June 2024 and the addition of 25 new addresses since the Census date. This results in a density ratio of 2,619 persons per square kilometer, placing Castle Hill - South in the upper quartile nationally according to AreaSearch assessments. Over the past decade, Castle Hill - South has exhibited steady growth with a compound annual growth rate of 1.1%, outperforming its SA3 region. Overseas migration contributed approximately 79.9% of overall population gains during recent periods.

AreaSearch uses ABS/Geoscience Australia projections for each SA2 area released in 2024, with a base year of 2022. For areas not covered by this data, NSW State Government's SA2 level projections from 2022 with a base year of 2021 are applied. Growth rates by age group from these aggregations are used for all areas from 2032 to 2041. Future population projections indicate above median growth for Australian statistical areas, with Castle Hill - South expected to grow by 1,595 persons to 2041, representing a total gain of 14.5% over the 17-year period.

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

Between financial years 2021 (FY-21) and 2025 (FY-25), Castle Hill - South approved approximately 99 dwellings for development. In the current financial year, FY-26, around 5 dwellings have been approved so far. On average, each dwelling constructed in this period attracts about 4.1 new residents annually.

This supply is significantly lagging behind demand, indicating heightened buyer competition and pricing pressures. The average construction value of new dwellings is approximately $508,000, suggesting developers are targeting the premium market segment with higher-end properties. In FY-26, around $7.4 million in commercial approvals have been granted, reflecting the area's primarily residential nature. Compared to Greater Sydney, Castle Hill - South has significantly reduced construction activity, with 80% below the regional average per person. This scarcity of new homes typically strengthens demand and prices for existing properties.

Additionally, this activity is also below national averages, indicating a mature area possibly constrained by planning regulations. The development approvals consist of approximately 71% standalone homes and 29% attached dwellings, preserving the suburban nature with an emphasis on detached housing attracting space-seeking buyers. Castle Hill - South has around 948 people per approval, demonstrating its established character. Population forecasts suggest Castle Hill - South will gain about 1,564 residents by 2041. If current development rates persist, housing supply may not keep pace with population growth, potentially increasing buyer competition and supporting stronger price growth.

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

Local infrastructure changes significantly impact area performance. AreaSearch identified 19 projects likely affecting the region. Notable initiatives include Hills Shire Council's Delivery Program and Operational Plan 2024-2025 Infrastructure Works, Chapman Gardens by CG Group, Castle Hill Panorama, and Hills Showground Village by Deicorp. 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.

Employment performance in Castle Hill - South has been broadly consistent with national averages

Castle Hill - South has a highly educated workforce with strong representation in professional services. Its unemployment rate is 3.6%, lower than the national average.

Over the past year, there was an estimated employment growth of 2.1%. As of June 2025, 5,925 residents are employed, with an unemployment rate of 0.6% below Greater Sydney's rate of 4.2%. Workforce participation is at 63.8%, slightly higher than Greater Sydney's 60.0%.

The leading employment industries among residents include professional & technical services, health care & social assistance, and retail trade. However, transport, postal & warehousing employs only 2.7% of local workers, lower than Greater Sydney's 5.3%. Employment opportunities locally may be limited as indicated by the difference between Census working population and resident population. Between June 2024 and June 2025, employment levels increased by 2.1%, while labour force grew by 3.1%, leading to a rise in unemployment rate of 0.9 percentage points. In comparison, Greater Sydney recorded employment growth of 2.6% with an unemployment increase of 0.3 percentage points. Jobs and Skills Australia's national employment forecasts from May 2025 suggest that over five years, national employment is expected to expand by 6.6%, and by 13.7% over ten years. Applying these projections to Castle Hill - South's employment mix indicates a potential local growth of approximately 7.0%% over five years and 14.1% over ten years.

Income metrics indicate excellent economic conditions, with the area achieving higher performance than 75% of national locations assessed by AreaSearch

Castle Hill - South has a very high national income level according to AreaSearch's aggregation of latest ATO data for financial year 2022. The median income among taxpayers in Castle Hill - South is $58,774 and the average income stands at $86,729. These figures compare with Greater Sydney's median income of $56,994 and average income of $80,856. Based on a 12.61% growth in Wage Price Index since financial year 2022, current estimates for Castle Hill - South would be approximately $66,185 (median) and $97,666 (average) as of September 2025. According to Census 2021 income data, household, family, and personal incomes in Castle Hill - South all rank highly nationally, between the 77th and 90th percentiles. Income distribution shows that the largest segment comprises 30.2% earning $1,500-$2,999 weekly (3,267 residents), similar to the broader area where 30.9% fall into this bracket. Notably, 41.3% earn above $3,000 weekly, indicating prosperity that fuels local economic activity. High housing costs consume 16.7% of income, but strong earnings place disposable income at the 89th percentile nationally. The area's SEIFA income ranking places it in the 9th decile.

Castle Hill - South is characterized by a predominantly suburban housing profile, with a higher proportion of rental properties than the broader region

In Castle Hill - South, as per the latest Census evaluation, 70.9% of dwellings were houses while 29.0% consisted of semi-detached homes, apartments and other types, compared to Sydney metro's 78.2% houses and 21.8% other dwellings. Home ownership in Castle Hill - South stood at 33.9%, with mortgaged dwellings at 36.0% and rented ones at 30.2%. The median monthly mortgage repayment was $3,000, aligning with Sydney metro's average, while the median weekly rent was $550 compared to Sydney metro's $3,000 and $580 respectively. Nationally, Castle Hill - South's median monthly mortgage repayments were significantly higher than Australia's average of $1,863, and rents were substantially above the national figure of $375.

Castle Hill - South features high concentrations of family households, with a lower-than-average median household size

Family households account for 83.9% of all households, including 46.1% couples with children, 26.5% couples without children, and 10.1% single parent families. Non-family households constitute the remaining 16.1%, with lone person households at 14.0% and group households comprising 2.1% of the total. The median household size is 2.9 people, which is smaller than the Greater Sydney average of 3.0.

Castle Hill - South 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 Hill - South exceeds national and state averages. 47.8% of residents aged 15 and above hold university qualifications, compared to 30.4% nationally and 32.2% in NSW. Bachelor degrees are the most common at 29.6%, followed by postgraduate qualifications (15.0%) and graduate diplomas (3.2%). Vocational pathways account for 24.2%.

Educational participation is high, with 31.5% of residents currently enrolled in formal education. This includes 10.6% in primary, 8.8% in secondary, and 6.4% in tertiary education. Castle Hill - South's three schools have a combined enrollment of 466 students. The area has significant socio-educational advantages with an ICSEA score of 1135. Education provision is balanced with two primary and one secondary school serving distinct age groups. School capacity is limited, with 4.3 places per 100 residents compared to the regional average of 17.4, leading many families to travel for schooling. Note: if school enrollments are not available, please refer to the parent campus.

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

The analysis of public transport in Castle Hill - South reveals that there are 43 active transport stops operating within the area. These stops serve a mix of buses, with a total of 79 individual routes providing service. Collectively, these routes facilitate 4,254 weekly passenger trips.

The accessibility to transport is rated as excellent, with residents typically located 163 meters from their nearest transport stop. On average, there are 607 trips per day across all routes, which equates to approximately 98 weekly trips per individual stop.

Castle Hill - South'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 in Castle Hill - South, with very low prevalence of common health conditions across all age groups. The rate of private health cover is exceptionally high at approximately 64% of the total population (6,901 people), compared to the national average of 55.3%.

The most common medical conditions are arthritis and asthma, affecting 5.7 and 5.7% of residents respectively. 76.8% of residents report being completely clear of medical ailments, compared to 75.9% across Greater Sydney. As of the latest data (2021), 18.7% of residents are aged 65 and over (2,020 people). Health outcomes among seniors in Castle Hill - South are particularly strong, broadly aligning with the general population's health profile.

Castle Hill - South is among the most culturally diverse areas in the country based on AreaSearch assessment of a range of language and cultural background related metrics

Castle Hill-South has high cultural diversity, with 45.4% speaking a language other than English at home and 46.7% born overseas. Christianity is the main religion, comprising 50.4%. Hinduism is overrepresented at 6.6%, compared to Greater Sydney's 8.6%.

The top three ancestry groups are English (16.5%), Chinese (16.3%), and Australian (15.7%). Korean (3.2%) and Indian (5.7%) groups are notably overrepresented, while Sri Lankan is slightly underrepresented at 0.7% compared to the regional average of 1.0%.

Castle Hill - South's population is slightly older than the national pattern

Castle Hill - South has a median age of 40, which is slightly higher than Greater Sydney's figure of 37 years and Australia's median age of 38 years. The 45-54 age cohort is notably over-represented in Castle Hill - South at 14.2%, compared to the Greater Sydney average. Conversely, the 25-34 age group is under-represented at 9.0%. Between 2021 and the present, the population of 15 to 24-year-olds has grown from 11.9% to 13.8%, while the 75 to 84 cohort increased from 5.5% to 6.6%. During this period, the 25 to 34 age group declined from 10.2% to 9.0%, and the 5 to 14 group dropped from 14.8% to 13.7%. By 2041, demographic modeling projects significant changes in Castle Hill - South's age profile. The 85+ age cohort is expected to surge dramatically, increasing by 395 people (154%) from 256 to 652. Notably, the combined 65+ age groups are projected to account for 59% of total population growth, reflecting the area's aging demographic trend. Meanwhile, the 0 to 4 and 35 to 44 cohorts are expected to experience population declines.