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

Based on AreaSearch's analysis, Asquith - Mount Colah's population is around 24,464 as of Feb 2026. This reflects an increase of 2,407 people (10.9%) since the 2021 Census, which reported a population of 22,057 people. The change is inferred from the estimated resident population of 23,268 from the ABS as of June 2024 and an additional 265 validated new addresses since the Census date. This population level equates to a density ratio of 705 persons per square kilometer, which is relatively in line with averages seen across locations assessed by AreaSearch. Asquith - Mount Colah's 10.9% growth since the 2021 census exceeded the SA4 region (5.8%) and the SA3 area, marking it as a growth leader in the region. Population growth for the area was primarily driven by overseas migration, which contributed approximately 55.7% of overall population gains during recent periods.

AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, as released in 2024 with 2022 as the base year. For any SA2 areas not covered by this data, AreaSearch is utilising the NSW State Government's SA2 level projections, as released in 2022 with 2021 as the base year. Growth rates by age group from these aggregations are also applied to all areas for years 2032 to 2041. Moving forward with demographic trends, a population increase just below the median of statistical areas across the nation is expected, with the area expected to grow by 3,124 persons to 2041 based on the latest annual ERP population numbers, reflecting a gain of 7.9% in total over the 17 years.

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

Asquith - Mount Colah has seen around 89 new homes approved each year, with 448 homes approved over the past 5 financial years (between FY-21 and FY-25) and 14 so far in FY-26. With an average of 4.9 people per year moving to the area for each dwelling built over the past 5 financial years (between FY-21 and FY-25), demand is significantly outpacing supply, which typically puts upward pressure on prices and increases competition among buyers, while new properties are constructed at an average value of $285,000—under regional levels—indicating more accessible housing choices for buyers. Additionally, $36.3 million in commercial approvals have been registered this financial year, suggesting robust local business investment.

When measured against Greater Sydney, Asquith - Mount Colah has slightly more development (48.0% above regional average per person over the 5 year period), balancing buyer choice with support for current property values, though building activity has slowed in recent years. New building activity shows 47.0% detached houses and 53.0% medium and high-density housing. This skew toward compact living offers affordable entry pathways and attracts downsizers, investors, and first-time purchasers. This represents a notable shift from the area's existing housing (currently 74.0% houses), indicating decreasing availability of developable sites and reflecting changing lifestyles and the need for more diverse, affordable housing options. The estimated count of 386 people in the area per dwelling approval reflects its quiet, low activity development environment.

Population forecasts indicate Asquith - Mount Colah will gain 1,928 residents through to 2041 (from the latest AreaSearch quarterly estimate). Based on current development patterns, new housing supply should readily meet demand, offering good conditions for buyers and potentially facilitating population growth beyond current projections.

Asquith - Mount Colah has very high levels of nearby infrastructure activity, ranking in the top 10% nationally

Nothing can influence an area's performance as much as changes to local infrastructure, major projects, and planning initiatives. In total 9 projects have been identified by AreaSearch that are likely to have an impact on the area. Key projects include Hornsby Park - from quarry to parklands, Mount Colah Station Upgrade, Arlington Heights Estate, and Berowra Valley National Park Northern Extension, with the list below detailing those likely to be of most relevance.

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 analysis reveals Asquith - Mount Colah recording weaker employment conditions than most comparable areas nationwide

Asquith - Mount Colah features a highly educated workforce, with the technology sector a particular standout in terms of representation, and an unemployment rate of 7.0%. As of December 2025, 12,483 residents are in work while the unemployment rate is 2.8% above Greater Sydney's rate of 4.2%, and workforce participation is broadly similar to Greater Sydney's 70.2%. Based on Census responses, a high 48.9% of residents were found to work from home, though Covid-19 lockdown impacts should be considered.

Employment among residents is concentrated in health care & social assistance, professional & technical, and education & training. The area has a particular employment specialization in education & training, with an employment share 1.3 times the regional level. Conversely, transport, postal & warehousing shows lower representation at 3.4% versus the regional average of 5.3%. The area appears to offer limited employment opportunities locally, as indicated by the count of the Census working population versus the resident population.

Based on AreaSearch analysis of SALM and ABS data, over the 12 months to December 2025, labour force levels increased by 1.1% alongside a 0.5% employment decline, causing the unemployment rate to rise by 1.6 percentage points. In contrast, Greater Sydney experienced employment growth of 2.2% and labour force growth of 2.3%, with a marginal rise. Jobs and Skills Australia's national employment forecasts from May-25 can offer further insight into potential future demand within Asquith - Mount Colah. These projections, covering five and ten-year periods, have been mapped against the local employment profile to estimate growth patterns. While national employment is forecast to expand by 6.6% over five years and 13.7% over ten years, growth rates differ significantly between industry sectors. Applying these industry-specific projections to Asquith - Mount Colah's employment mix suggests local employment should increase by 7.2% over five years and 14.7% over ten years (please note this is a simple weighting extrapolation for illustrative purposes and does not take into account localised population projections).

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

As per AreaSearch's latest postcode level ATO data released for FY-23, the Asquith - Mount Colah SA2's median income among taxpayers is $63,051, with an average of $78,362. This is very high nationally, and compares to Greater Sydney's median of $60,817 and average of $83,003. Based on Wage Price Index growth of 8.86% since FY-23, current estimates would be approximately $68,637 (median) and $85,305 (average) as of September 2025. Census 2021 income data shows household, family and personal incomes all rank highly in Asquith - Mount Colah, between the 79th and 89th percentiles nationally. Income analysis reveals the largest segment comprises 31.9% earning $1,500 - 2,999 weekly (7,804 residents), mirroring the metropolitan region where 30.9% occupy this bracket. The substantial proportion of high earners (40.1% above $3,000/week) indicates strong economic capacity throughout this suburb. High housing costs consume 15.7% of income, though strong earnings still place disposable income at the 88th percentile and 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

Dwelling structure within Asquith - Mount Colah, as evaluated at the latest Census, comprised 74.4% houses and 25.6% other dwellings (semi-detached, apartments, 'other' dwellings), in comparison to Sydney metro's 55.9% houses and 44.1% other dwellings. Meanwhile, the level of home ownership within Asquith - Mount Colah was well beyond that of Sydney metro, at 31.7%, with the remainder of dwellings either mortgaged (47.4%) or rented (20.9%). The median monthly mortgage repayment in the area was above the Sydney metro average at $2,550, while the median weekly rent figure was recorded at $500, compared to Sydney metro's $2,427 and $470. Nationally, Asquith - Mount Colah's mortgage repayments are significantly higher than the Australian average of $1,863, while rents are 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 dominate at 82.4% of all households, comprising 46.7% couples with children, 25.0% couples without children, and 9.8% single parent families. Non-family households make up the remaining 17.6%, with lone person households at 15.9% and group households comprising 1.7% of the total. The median household size of 2.9 people 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 faces educational challenges, with university qualification rates (43.1%) substantially below the SA4 region average of 57.1%. This represents both a challenge and an opportunity for targeted educational initiatives. Bachelor degrees lead at 27.7%, followed by postgraduate qualifications (11.9%) and graduate diplomas (3.5%). Trade and technical skills feature prominently, with 29.5% of residents aged 15+ holding vocational credentials, including advanced diplomas (12.2%) and certificates (17.3%).

Educational participation is notably 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

Public transport analysis reveals 195 active transport stops operating within Asquith - Mount Colah comprising a mix of train and buses. These stops are serviced by 34 individual routes, collectively providing 2,632 weekly passenger trips. Transport accessibility is rated as excellent, with residents typically located 145 meters from the nearest transport stop. As a primarily residential area, most residents commute outward - the car remains the dominant mode at 80%, with 13% by train. Vehicle ownership averages 1.4 per dwelling, above the regional average. A high 48.9% of residents work from home (2021 Census; may reflect COVID-19 conditions).

Service frequency averages 376 trips per day across all routes, equating to approximately 13 weekly trips per individual stop. The accompanying map shows the 100 nearest stops to the location centrepoint.

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

Health outcomes data demonstrates outstanding results across Asquith - Mount Colah, based on AreaSearch's assessment of mortality rates and chronic condition prevalence. There is a very low prevalence of common health conditions across all age groups, and the rate of private health cover is very high at approximately 58% of the total population (~14,189 people).

The most common medical conditions in the area are asthma and mental health issues, impacting 7.4 and 7.0% of residents, respectively, while 73.5% declared themselves as completely clear of medical ailments compared to 74.6% across Greater Sydney. Working-age residents are notably healthy with low chronic condition prevalence. The area has 16.2% of residents aged 65 and over (3,958 people). Health outcomes among seniors are particularly strong, though they rank lower nationally than the broader population.

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 scores highly on cultural diversity, with 30.1% of its population speaking a language other than English at home and 37.1% born overseas. The main religion in Asquith - Mount Colah is Christianity, which makes up 46.4% of the population. However, the most apparent overrepresentation was in Judaism, which comprises 0.4% of the population, compared to 0.8% across Greater Sydney.

In terms of ancestry (country of birth of parents), the top three represented groups in Asquith - Mount Colah are English, comprising 23.5% of the population, Australian, comprising 21.6% of the population, and Other, comprising 12.8% of the population. Additionally, there are notable divergences in the representation of certain other ethnic groups: Korean is notably overrepresented at 1.3% of Asquith - Mount Colah (vs 1.1% regionally), Russian at 0.6% (vs 0.4%) and Chinese at 7.4% (vs 8.4%).

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

With a median age of 40, Asquith - Mount Colah is somewhat higher than the Greater Sydney figure of 37 and similarly marginally higher than Australia's 38 years. Compared to the Greater Sydney average, the 45 - 54 cohort is notably over-represented (16.0% locally), while 25 - 34 year-olds are under-represented (8.7%). In the period since 2021, the 15 to 24 age group has grown from 12.0% to 13.4% of the population, while the 75 to 84 cohort increased from 4.2% to 5.5%. Conversely, the 25 to 34 cohort has declined from 10.9% to 8.7%. Demographic modeling suggests Asquith - Mount Colah's age profile will evolve significantly by 2041. The 55 to 64 age cohort is projected to see notable expansion, expanding by 625 people (22%) from 2,791 to 3,417. Notably, the combined 65+ age groups will account for 64% of total population growth, reflecting the area's aging demographic profile. Meanwhile, the 15 to 24 and 0 to 4 cohorts are expected to experience population declines.