Asquith - Mount Colah

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 is approximately 23,474 as of November 2025. This figure represents an increase of 1,417 people since the 2021 Census, which recorded a population of 22,057. The growth is inferred from ABS' estimated resident population of 23,315 in June 2024 and the addition of 264 validated new addresses since the Census date. This results in a density ratio of 676 persons per square kilometer. Asquith-Mount Colah's growth rate of 6.4% since the 2021 census exceeds both 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 from 2022 with a base year of 2021 are utilized. Growth rates by age group are applied to all areas for years 2032 to 2041. According to population projections, the area is expected to expand by 3,124 persons to 2041, reflecting an 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 granted around 89 residential property approvals annually. Over the past five financial years, from FY21 to FY25448 homes have been approved, with a further 12 approved in FY26 so far. On average, 4.9 people per year moved into the area for each dwelling built during this period.

This high demand outpaces supply, putting upward pressure on prices and increasing buyer competition. The average construction cost of new homes is $285,000, below the regional average, offering more affordable housing options. This financial year, Asquith - Mount Colah has recorded $36.3 million in commercial development approvals, 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 past five years. This balances buyer choice while supporting current property values.

New building activity shows a shift towards compact living, with 53.0% medium and high-density housing compared to the existing 74.0% houses. This offers affordable entry pathways for downsizers, investors, and first-time purchasers, reflecting decreasing developable sites and changing lifestyles. The area has an estimated 386 people per dwelling approval, indicating a quiet development environment. Population forecasts suggest Asquith - Mount Colah will gain 2,918 residents by 2041. Building activity is keeping pace with growth projections, but buyers may experience heightened competition as the population grows.

Asquith - Mount Colah has very high levels of nearby infrastructure activity, ranking in the top 20% nationally

Changes to local infrastructure significantly influence an area's performance. AreaSearch has identified nine projects likely impacting the area. Notable projects include Hornsby Park's transformation from quarry to parklands, Mount Colah Station Upgrade, Arlington Heights Estate development, and Berowra Valley National Park Northern Extension. 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 an educated workforce with a notable presence in the technology sector. Its unemployment rate was 7.6% as of September 2025.

In this month, 12,431 residents were employed, which is 3.4% higher than Greater Sydney's rate of 4.2%. Workforce participation in Asquith - Mount Colah was 68.7%, exceeding Greater Sydney's 60.0%. Employment is concentrated in health care & social assistance, professional & technical services, and education & training. The area specializes in education & training with an employment share 1.3 times the regional level.

Conversely, transport, postal & warehousing has lower representation at 3.4% compared to the regional average of 5.3%. Local employment opportunities appear limited based on Census data comparisons. Over the year to September 2025, labour force levels increased by 0.7%, while employment declined by 2.4%, leading to a 2.9 percentage point rise in unemployment rate. In contrast, Greater Sydney saw employment growth of 2.1% and labour force growth of 2.4%. State-level data from NSW to 25-Nov shows employment contracted by 0.03%, with an unemployment rate of 3.9%, compared to the national rate of 4.3%. National employment forecasts project a 6.6% increase over five years and 13.7% over ten years. Applying these projections to Asquith - Mount Colah's employment mix suggests local employment could grow by 7.2% in five years and 14.7% in ten years, based on simple weighted extrapolation for illustrative purposes.

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 SA2 had a median taxpayer income of $59,048 and an average of $75,353. Nationally, these figures are high compared to Greater Sydney's median of $56,994 and average of $80,856. Based on Wage Price Index growth of 12.61% since financial year 2022, estimated incomes for September 2025 would be approximately $66,494 (median) and $84,855 (average). Census 2021 income data ranks household, family, and personal incomes in Asquith - Mount Colah between the 79th and 89th percentiles nationally. Income analysis reveals that 31.9% of residents earn between $1,500 and $2,999 weekly (7,488 residents), similar to the metropolitan region where 30.9% fall into this bracket. Notably, 40.1% 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 88th percentile. 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, was 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 was 31.7%, with mortgaged dwellings at 47.4% and rented ones at 20.9%. The median monthly mortgage repayment was $2,550, higher than Sydney metro's average of $2,500. Weekly rent in the area was $500, compared to Sydney metro's $480. Nationally, Asquith - Mount Colah's mortgage repayments were significantly higher at $2,550 versus Australia's average of $1,863, and 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 account for 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 constitute the remaining 17.6%, with lone person households at 15.9% and group households comprising 1.7%. The median household size is 2.9 people, which is 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%. Bachelor degrees are most common at 27.7%, followed by postgraduate qualifications (11.9%) and graduate diplomas (3.5%). Vocational credentials are prevalent, with 29.5% of residents aged 15+ holding them, including advanced diplomas (12.2%) and certificates (17.3%). Educational participation is high, with 31.5% of residents currently enrolled in formal education.

This includes 10.5% in primary education, 8.6% in secondary education, and 5.8% pursuing tertiary education.

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

Transport analysis shows 189 active public transport stops in Asquith - Mount Colah. These include both train and bus services. There are 34 individual routes operating, collectively providing 2,475 weekly passenger trips.

Transport accessibility is rated excellent, with residents typically located 146 meters from the nearest stop. Service frequency averages 353 trips per day across all routes, equating to approximately 13 weekly trips per 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 shows excellent health outcomes, with very low prevalence of common health conditions across all age groups. The rate of private health cover is high at approximately 57% (~13,403 people), compared to Greater Sydney's 60.8%.

Asthma and mental health issues are the most common medical conditions, affecting 7.4% and 7.0% respectively. 73.5% of residents report being completely clear of medical ailments, similar to Greater Sydney's 74.0%. As of 2016 data, 15.6% (3,664 people) are aged 65 and over, lower than Greater Sydney's 17.1%. Despite this, health outcomes among seniors in the area are strong and largely align with the general population's profile.

Asquith - Mount Colah 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

Asquith-Mount Colah has high cultural diversity, with 30.1% speaking a language other than English at home and 37.1% born overseas by 2016 Census data. Christianity is the dominant religion, at 46.4%. Judaism's representation is notable at 0.4%, compared to Greater Sydney's 0.4%.

Top ancestry groups are English (23.5%), Australian (21.6%), and Other (12.8%). Korean is overrepresented at 1.3% vs region's 2.0%, Russian remains similar at 0.6%, while Chinese is underrepresented at 7.4% compared to the regional 11.6%.

Asquith - Mount Colah's population aligns closely with national norms in age terms

The median age in Asquith - Mount Colah is 39 years, which is higher than Greater Sydney's average of 37 years and close to the national average of 38 years. The 45-54 age cohort is notably over-represented at 15.9% locally compared to Greater Sydney's average, while the 25-34 age group is under-represented at 9.1%. According to post-2021 Census data, the 15-24 age group has increased from 12.0% to 13.3%, and the 45-54 cohort has risen 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 2,650. Residents aged 65 and older will represent 58% of the anticipated growth. Meanwhile, the 5-14 and 0-4 age cohorts are projected to experience population declines.