Asquith - Mount Colah
Statistical Area - sa2

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

Asquith-Mount Colah's population stands at approximately 23,474 as of November 2025. This figure reflects a growth of 1,417 people since the 2021 Census, which recorded a population of 22,057. The increase is inferred from the estimated resident population of 23,315 in June 2024 and an additional 264 validated new addresses since the Census date. This results in a population density ratio of 676 persons per square kilometer. Asquith-Mount Colah's growth rate of 6.4% since the 2021 census exceeds that of its SA3 area (4.3%) and SA4 region, indicating it as a growth leader. Overseas migration contributed approximately 55.7% of overall population gains in 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 are used, 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. Population projections indicate an above median growth, with the area expected to expand by 3,124 persons to 2041, marking a total increase of 12.4% over the 17-year period.

AreaSearch assessment of residential development activity positions Asquith - Mount Colah among the top 25% of areas assessed nationwide

Asquith - Mount Colah has recorded approximately 89 residential properties granted approval annually. Over the past five financial years, from FY-21 to FY-25, around 448 homes have been approved, with another 10 approved so far in FY-26. On average, about 4.9 people per year have moved to the area for each dwelling built during this period.

This demand significantly outpaces supply, which typically puts upward pressure on prices and increases competition among buyers. The average expected construction cost value of new homes being built is around $285,000, below the regional average, suggesting more affordable housing options for buyers. In FY-26, $36.3 million in commercial development approvals have been recorded, indicating strong commercial development momentum. Compared to Greater Sydney, Asquith - Mount Colah has slightly more development activity, with 48.0% above the regional average per person over the five-year period from FY-21 to FY-25. This balance supports buyer choice while maintaining current property values, although building activity has slowed in recent years.

New building activity shows that 47.0% of dwellings are detached houses, with 53.0% being medium and high-density housing. This shift towards compact living offers affordable entry pathways and attracts downsizers, investors, and first-time purchasers. This represents a notable change from the area's existing housing composition, which is currently 74.0% houses. The estimated count of 386 people in the area per dwelling approval reflects its quiet, low activity development environment. Population forecasts indicate that Asquith - Mount Colah will gain approximately 2,918 residents by 2041. Building activity is keeping pace with growth projections, though buyers may experience heightened competition as the population grows.

Asquith - Mount Colah 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 has identified nine projects likely impacting the area. Key projects include transforming Hornsby Park from a quarry into parklands, upgrading Mount Colah Station, developing Arlington Heights Estate, and extending Berowra Valley National Park northwards. 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 indicates Asquith - Mount Colah faces employment challenges relative to the majority of Australian markets

Asquith - Mount Colah has a highly educated workforce with notable representation in the technology sector. As of June 2025, its unemployment rate was 7.5%.

The area had 12,479 residents employed, with an unemployment rate of 3.3% above Greater Sydney's rate of 4.2%. Workforce participation was high at 68.7%, compared to Greater Sydney's 60.0%. Employment was concentrated in health care & social assistance, professional & technical services, and education & training. The area had a particular specialization in education & training, with an employment share 1.3 times the regional level.

Conversely, transport, postal & warehousing showed lower representation at 3.4% versus the regional average of 5.3%. Over the year to June 2025, labour force levels decreased by 0.3%, and employment declined by 3.4%, leading to a rise in unemployment rate by 3.0 percentage points. In contrast, Greater Sydney experienced employment growth of 2.6% and labour force growth of 2.9%. National employment forecasts from Jobs and Skills Australia (May 2025) project national employment growth of 6.6% over five years and 13.7% over ten years. Applying these projections to Asquith - Mount Colah's employment mix suggests local growth of approximately 7.2% over five years and 14.7% over ten years, though these are simple extrapolations for illustrative purposes only.

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

AreaSearch's latest postcode level ATO data for financial year 2022 shows Asquith - Mount Colah had a median income of $59,048 and an average income of $75,353 among taxpayers. Nationally, these figures are high, with Greater Sydney having a median income of $56,994 and an average income of $80,856. Based on Wage Price Index growth of 12.61% since financial year 2022, current estimates for Asquith - Mount Colah are approximately $66,494 (median) and $84,855 (average) as of September 2025. Census 2021 income data indicates that household, family, and personal incomes in Asquith - Mount Colah rank highly nationally, between the 80th and 90th percentiles. Income analysis reveals that the largest segment comprises 31.9% of residents earning $1,500 to $2,999 weekly, which is similar to the metropolitan region where 30.9% fall into this bracket. Notably, 40.1% of residents earn above $3,000 per week, indicating strong economic capacity in the suburb. High housing costs consume 15.7% 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.

Asquith - Mount Colah is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership

Asquith-Mount Colah's dwelling structure, as per the latest Census, consisted of 74.4% houses and 25.6% other dwellings (semi-detached, apartments, 'other' dwellings), compared to Sydney metro's 61.4% houses and 38.6% other dwellings. Home ownership in Asquith-Mount Colah stood at 31.7%, similar to Sydney metro, with mortgaged dwellings at 47.4% and rented ones at 20.9%. The median monthly mortgage repayment in the area was $2,550, above Sydney metro's average of $2,500. The median weekly rent figure was $500, compared to Sydney metro's $480. Nationally, Asquith-Mount Colah's mortgage repayments were significantly higher than the Australian average of $1,863, while rents were substantially above the national figure of $375.

Asquith - Mount Colah features high concentrations of family households, with a higher-than-average median household size

Family households comprise 82.4% of all households, including 46.7% couples with children, 25.0% couples without children, and 9.8% single parent families. Non-family households account for 17.6%, with lone person households at 15.9% and group households making up 1.7%. The median household size is 2.9 people, larger than the Greater Sydney average of 2.7.

Educational achievement in Asquith - Mount Colah places it within the top 10% nationally, reflecting strong academic performance and high qualification levels across the community

The area's university qualification rate is 43.1%, significantly lower than the SA4 region average of 57.1%. This indicates a need for targeted educational initiatives. Bachelor degrees are most prevalent at 27.7%, followed by postgraduate qualifications (11.9%) and graduate diplomas (3.5%). Vocational credentials are held by 29.5% of residents aged 15+, with advanced diplomas at 12.2% and certificates at 17.3%.

Educational participation is high, with 31.5% of residents currently enrolled in formal education. This includes 10.5% in primary, 8.6% in secondary, and 5.8% in tertiary education. There are 8 schools operating within Asquith - Mount Colah, educating approximately 2,870 students. The area has above-average socio-educational conditions (ICSEA: 1090). The educational mix includes 5 primary, 2 secondary, and 1 K-12 school. School places per 100 residents are 12.2, below the regional average of 16.1, suggesting some students may attend schools in adjacent areas.

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

Public transport analysis shows 189 active transport stops operating within Asquith - Mount Colah. These include a mix of train and bus services. There are 34 individual routes servicing these stops, collectively providing 2,475 weekly passenger trips.

Transport accessibility is rated as excellent, with residents typically located 146 meters from the nearest transport stop. Service frequency averages 353 trips per day across all routes, equating to approximately 13 weekly trips per individual stop.

Asquith - Mount Colah's residents boast exceedingly positive health performance metrics with very low prevalence of common health conditions across all age groups

Asquith-Mount Colah has excellent health outcomes, with a low prevalence of common health conditions across all ages. Private health cover is high at approximately 57% (~13,403 people), compared to Greater Sydney's 60.8%.

The most prevalent medical conditions are asthma (7.4%) and mental health issues (7.0%). A total of 73.5% of residents report no medical ailments, similar to Greater Sydney's 74.0%. As of 2019, 15.6% (~3,664 people) are aged 65 and over, lower than Greater Sydney's 17.1%. Seniors' health outcomes align with the general population's profile.

Asquith - Mount Colah is among the most culturally diverse areas in the country based on AreaSearch assessment of a range of language and cultural background related metrics

Asquith-Mount Colah has notable cultural diversity, with 30.1% of its population speaking a language other than English at home and 37.1% born overseas as of the latest data. Christianity is the predominant religion in Asquith-Mount Colah, comprising 46.4% of people, while Judaism is slightly overrepresented at 0.4%, compared to Greater Sydney's 0.4%. The top three ancestry groups are English (23.5%), Australian (21.6%), and Other (12.8%).

Notable variations exist in the representation of Korean (1.3% vs regional 2.0%), Russian (0.6% vs regional 0.6%), and Chinese (7.4% vs regional 11.6%) ethnic groups.

Asquith - Mount Colah's population is slightly older than the national pattern

The median age in Asquith - Mount Colah is 39 years, which is higher than Greater Sydney's average of 37 years and close to Australia's national average of 38 years. Comparing the two regions, the 45-54 age group is notably over-represented in Asquith - Mount Colah at 15.9%, while the 25-34 age group is under-represented at 9.1%. According to post-2021 Census data, the population of the 15-24 age group has grown from 12.0% to 13.3%, and the 45-54 age group has increased from 14.8% to 15.9%. Conversely, the 25-34 age group has declined from 10.9% to 9.1%. Population forecasts for 2041 indicate significant demographic changes in Asquith - Mount Colah. The 55-64 age group is expected to grow by 29%, reaching 3,417 people from the current 2,650. Residents aged 65 and older will represent 58% of this growth. Meanwhile, the 5-14 and 0-4 age groups are projected to experience population declines.