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

As of Feb 2026, Asquith - Mount Colah's population is around 24,464. This figure reflects an increase of 2,407 people since the 2021 Census, which recorded a population of 22,057. The change is inferred from the estimated resident population of 23,268 in June 2024 and an additional 265 validated new addresses since the Census date. This results in a population density ratio of 705 persons per square kilometer. Asquith - Mount Colah's growth rate of 10.9% since the 2021 census exceeded both the SA4 region (5.8%) and the SA3 area, indicating it as a growth leader in the region. Overseas migration contributed approximately 55.7% 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, AreaSearch utilises NSW State Government's SA2 level projections 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. Based on demographic trends and the latest annual ERP population numbers, Asquith - Mount Colah is expected to grow by 3,124 persons to 2041, 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 approximately 89 new homes approved annually. Over the past five financial years, from FY21 to FY25448 homes were approved, with an additional 13 approved in FY26 as of now. On average, about 4.9 people moved to the area each year for every dwelling built during these five years.

This high demand relative to supply can put upward pressure on property prices and increase competition among buyers. The average construction cost value of new properties is $285,000, which is below regional levels, suggesting more affordable housing options for buyers. In FY26, commercial approvals totaling $36.3 million have been registered, indicating robust local business investment. Comparatively, Asquith-Mount Colah has seen slightly more development than the Greater Sydney average over the past five years, with a 48% increase per person. This balance between buyer choice and property value support is maintained despite a recent slowdown in building activity.

The new housing construction comprises 47% detached houses and 53% medium to high-density housing, representing a shift from the area's current housing composition of 74% houses. This change reflects decreasing developable sites and evolving lifestyles that require more diverse and affordable housing options. The area has had an estimated 386 people per dwelling approval, indicating a quiet development environment. Future population growth is projected to add 1,928 residents by 2041, based on the latest AreaSearch quarterly estimate. If current development patterns continue, new housing supply should meet demand adequately, providing favorable conditions for buyers and potentially facilitating further population growth beyond current projections.

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 identified nine projects likely impacting the region. Key initiatives 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 an educated workforce with a notable presence in the technology sector. The unemployment rate is 7.6%. As of September 2025, there are 12,431 employed residents, with an unemployment rate of 3.4% higher than Greater Sydney's rate of 4.2%.

Workforce participation is similar to Greater Sydney's at 70.0%. According to Census responses, 48.9% of residents work from home. Employment is concentrated in health care & social assistance, professional & technical services, and education & training. The area has a high specialization in education & training, with an employment share 1.3 times the regional level.

Conversely, transport, postal & warehousing shows lower representation at 3.4% compared to the regional average of 5.3%. Over the year ending September 2025, labour force levels increased by 0.7%, while employment declined by 2.4%, leading to a rise in unemployment rate by 2.9 percentage points. In contrast, Greater Sydney experienced employment growth of 2.1% and labour force growth of 2.4%. National employment forecasts from May-25 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 employment should increase by 7.2% over five years and 14.7% over ten years.

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 2023 shows Asquith - Mount Colah SA2 had a median income among taxpayers of $63,051 and an average of $78,362. Nationally, these figures are high, with Greater Sydney's median being $60,817 and average at $83,003. By September 2025, estimated incomes would be approximately $68,637 (median) and $85,305 (average), based on Wage Price Index growth of 8.86% since financial year 2023. Census 2021 income data ranks Asquith - Mount Colah's household, family, and personal incomes highly, between the 79th and 89th percentiles nationally. Income analysis reveals that 31.9% of residents earn $1,500 - 2,999 weekly (7,804 individuals), mirroring the metropolitan region's 30.9%. Notably, 40.1% earn above $3,000/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, consisted of 74.4% houses and 25.6% other dwellings (semi-detached, apartments, 'other' dwellings), compared to Sydney metro's 55.9% houses and 44.1% other dwellings. Home ownership in Asquith - Mount Colah stood at 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 $2,427. Median weekly rent in the area was $500, compared to Sydney metro's $470. Nationally, Asquith - Mount Colah's mortgage repayments were significantly higher at $1,863 and rents 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 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, 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 presents both a challenge and an opportunity for targeted educational initiatives. Bachelor degrees are most common at 27.7%, followed by postgraduate qualifications (11.9%) and graduate diplomas (3.5%). Trade and technical skills are prominent, with 29.5% of residents aged 15+ holding vocational credentials – 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

As of the 2021 Census, Asquith - Mount Colah has 195 active public transport stops offering a mix of train and bus services. These stops are served by 34 routes, collectively facilitating 2,632 weekly passenger trips. Residents enjoy excellent transport accessibility, with an average distance of 145 meters to the nearest stop. Predominantly residential, most commuters travel outward, primarily by car (80%), followed by train at 13%. Vehicle ownership stands at 1.4 per dwelling, above the regional average. Notably, 48.9% of residents work from home, which may be influenced by COVID-19 conditions.

Service frequency averages 376 trips daily across all routes, translating to roughly 13 weekly trips per individual stop. The accompanying map displays the 100 nearest stops to the location's centerpoint.

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

AreaSearch's assessment shows exceptional health outcomes in Asquith - Mount Colah.

Mortality rates and chronic condition prevalence are very low across all age groups. Private health cover is high at approximately 58% of the total population (~14,189 people). The most prevalent medical conditions are asthma (7.4%) and mental health issues (7.0%). A majority, 73.5%, report no medical ailments, slightly lower than Greater Sydney's 74.6%. Working-age residents have low chronic condition prevalence. The area has a senior population of 16.2% (~3,958 people), with strong health outcomes despite ranking lower nationally compared to 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 has a high level of cultural diversity, with 30.1% of its population speaking a language other than English at home and 37.1% born overseas. Christianity is the predominant religion in Asquith-Mount Colah, comprising 46.4% of the population. Notably, Judaism is overrepresented, making up 0.4% compared to 0.8% across Greater Sydney.

The top three ancestral groups are English (23.5%), Australian (21.6%), and Other (12.8%). There are also notable differences in the representation of certain ethnic groups: Korean is overrepresented at 1.3% compared to 1.1% regionally, Russian at 0.6% compared to 0.4%, and Chinese at 7.4% compared to 8.4%.

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

Asquith - Mount Colah has a median age of 40, which is slightly higher than Greater Sydney's figure of 37 and Australia's national average of 38 years. The area has a notably higher proportion of the 45-54 age cohort at 16.0%, compared to Greater Sydney's average, while the 25-34 year-olds are under-represented at 8.7%. Between 2021 and present, the 15 to 24 age group has increased from 12.0% to 13.4% of the population, while the 75 to 84 cohort has risen from 4.2% to 5.5%. Conversely, the 25 to 34 age group has decreased from 10.9% to 8.7%. By 2041, demographic modeling suggests significant changes in Asquith - Mount Colah's age profile. The 55 to 64 age cohort is projected to expand by 625 people (22%), growing from 2,791 to 3,417. Notably, the combined 65+ age groups are expected to account for 64% of total population growth, reflecting the area's aging demographic trend. Meanwhile, the 15 to 24 and 0 to 4 age cohorts are anticipated to experience population declines.