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This analysis uses ABS Statistical Areas Level 2 (SA2) boundaries, which can materially differ from Suburbs and Localities (SAL) even when sharing similar names.
SA2 boundaries are defined by the Australian Bureau of Statistics and are designed to represent communities for statistical reporting (e.g., census and ERP).
Suburbs and Localities (SAL) represent commonly-used suburb/locality names (postal-style areas) and may use different geographic boundaries. For comprehensive analysis, consider reviewing both boundary types if available.
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Sales Activity
Curious about local property values? Filter the chart to assess the volume and appreciation (including resales) trends and regional comparisons, or scroll to the map below view this information at an individual property level.
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Sales Detail
Population
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 23,579 as of May 2026. This figure represents a growth of 1,522 people since the 2021 Census, which recorded a population of 22,057. The increase was inferred from ABS estimates in June 2025 and validated new addresses since the Census date. The population density is around 679 persons per square kilometer. Asquith - Mount Colah's growth rate of 6.9% since the 2021 census surpassed both its SA3 area (4.5%) and SA4 region, making it a growth leader in the region. Overseas migration contributed approximately 60.0% to recent population gains.
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 utilized, released in 2022 with a base year of 2021. Growth rates by age group are applied to all areas for the years 2032 to 2041. By 2041, Asquith - Mount Colah's population is projected to increase by approximately 2,885 persons, reflecting a total gain of around 12.0% over the 16-year period.
Frequently Asked Questions - Population
Development
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 FY25, around 448 homes were approved, with an additional 22 approved in FY26 so far. Each dwelling built attracted an average of 4.9 people per year over these five years, indicating high demand outpacing supply, which typically influences property prices and buyer competition.
New properties are constructed at an average expected cost of $285,000, below regional levels, suggesting more affordable housing options for buyers. This financial year has seen $36.3 million in commercial approvals, reflecting robust local business investment. Comparatively, Asquith-Mount Colah has slightly higher development activity than Greater Sydney, with 46.0% above the regional average per person over the past five years. This balance supports buyer choice while maintaining current property values, despite a recent slowdown in building activity. New building activity comprises 47.0% detached houses and 53.0% medium to high-density housing, shifting away from the area's existing housing composition of 74.0% houses.
This change reflects decreasing developable sites and evolving lifestyles seeking more diverse, affordable housing options. The area has a quiet development environment with an estimated 386 people per dwelling approval. Population forecasts indicate Asquith-Mount Colah will gain approximately 2,833 residents by 2041, according to the latest AreaSearch quarterly estimate. Building activity is keeping pace with growth projections, though heightened competition among buyers can be expected as the population increases.
Frequently Asked Questions - Development
Development applications around Asquith - Mount Colah
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| Lodged | Address | Description | Type | Distance | Status |
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SOURCE: Planning portals and council registers, compiled by AreaSearch. Distance & bearing measured from the suburb midpoint.
Infrastructure
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 to impact the region. Notable initiatives include transforming Hornsby Park from a quarry into parklands, upgrading Mount Colah Station, developing Arlington Heights Estate, and enhancing Hornsby Park itself. The following list details those most relevant:.
Professional plan users can use the search below to filter and access additional projects.
INFRASTRUCTURE SEARCH
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Frequently Asked Questions - Infrastructure
Sydney Metro Northwest
Sydney Metro Northwest is Australia's first fully automated metro rail system. Spanning 36 km from Tallawong to Chatswood, the line features 13 stations, including 8 new stations and 5 converted from the Epping to Chatswood rail link. It features driverless trains, platform screen doors, and turn-up-and-go services every 4 minutes during peak periods. As of 2026, it forms the northern section of the M1 North West & Bankstown Line, which has successfully completed end-to-end testing from Tallawong to Bankstown.
Low and Mid-Rise Housing Policy
Comprehensive NSW state planning reforms designed to increase housing density in well-located areas. The policy mandates mid-rise apartment buildings (3-6 storeys) and low-rise multi-dwelling housing (terraces, townhouses, and dual occupancies) within 800m of 171 high-frequency transport hubs and town centres. As of May 2026, the policy is fully operational following the phased rollout of dual occupancy provisions in July 2024 and mid-rise apartment provisions in early 2025. Recent updates include refined floor space ratios (FSR) and non-refusal standards to streamline local council assessments.
Sydney Metro Program
Australia's largest public transport program, comprising multiple metro lines across Greater Sydney. The M1 City and Southwest line is operating to Sydenham, while the Sydenham to Bankstown conversion is in final testing with weekend closures scheduled from May to July 2026 as the project moves toward trial running and a second-half 2026 opening. Sydney Metro West is a 24 kilometre underground line between Westmead and Hunter Street targeting a 2032 opening, with confirmed stations at Westmead, Parramatta, Sydney Olympic Park, North Strathfield, Burwood North, Five Dock, The Bays, Pyrmont and Hunter Street. Sydney Metro Western Sydney Airport is under construction between St Marys, the new Western Sydney International Airport and Bradfield, with the objective of opening when the airport starts passenger services.
Hornsby Park
Transformation of the 60-hectare former Hornsby Quarry site into a major regional bush parkland in Sydney's upper north shore. The first stage opened to the public in late March 2026, comprising the Crusher Plant Precinct (lawns, picnic shelters, electric BBQs, accessible toilets, free parking), the Southern Lookout providing fully accessible sweeping views into the volcanic quarry void, and the upgraded Heritage Steps linking the Hornsby Aquatic and Leisure Centre down into the precinct. Construction continues in stages, with future works including the Quarry Loop walking and cycling track, additional scenic lookouts, a bike jump and pump track, and the Old Mans Valley field of play. Longer term masterplan elements feature a freshwater quarry lake, wetlands cascade, lakeside amenities and an accessible lift to the quarry base. The masterplan was designed by Clouston Associates with Hornsby Shire Council. Stage 1 has been supported by the NSW Government through the Stronger Communities Fund.
Hornsby Ku-ring-gai Hospital Redevelopment - Stage 2 & 2A
NSW Government $300 million investment in new clinical services building, expanded Emergency Department, renal dialysis unit, chemotherapy unit, robotic pharmacy, and rooftop helipad. First public hospital in NSW with robotic pharmacy. Completed in 2022, Stage 2 includes new multi-storey clinical services building, expanded emergency department, new operating theatres, enhanced maternity services, and outpatient ambulatory care services.
Westfield Hornsby Transport Oriented Development
A major mixed-use redevelopment of Westfield Hornsby within the NSW Government's Transport Oriented Development (TOD) Accelerated Precinct. The project involves rezoning to allow for approximately 6,000 new dwellings across multiple high-rise residential towers (reaching up to 53 storeys), alongside expanded retail, commercial spaces, and 2,900 new jobs. Key infrastructure includes a new public library, a Town Square, a new pedestrian overpass at Hornsby Station, and upgraded open spaces like Burdett Street Park.
Hills Shire Council Infrastructure Delivery Program 2025-2026
The Hills Shire Council's multi-year infrastructure delivery program, with the 2024-25 plan centred on a $162.8 million capital works spend covering roads, parks, paths and community facilities across the rapidly growing Hills Shire. Major works include the $24.4 million four-laning of Annangrove Road between Withers and Windsor Roads, the $20.2 million Withers Road upgrade, and the $28.5 million Boundary Road transformation including a new bridge over Killarney Chain of Ponds Creek. Additional works include the Livvi's Place expansion at Bernie Mullane Sports Complex, a cycleway along Cattai Creek, and shared pathways along Norwest Boulevard. The 2025-26 Delivery Program 2025-2029 has since been adopted, and a draft 2026-27 Hills Shire Plan proposing a $268 million investment has been released for community feedback. Council continues to advocate for $207 million in NSW Government funding to address a critical infrastructure deficit in the Box Hill growth area.
Hornsby Park - from quarry to parklands
Redevelopment of the former Hornsby Quarry and adjoining Old Mans Valley into Hornsby Park, a 60 hectare regional parkland with a quarry lake, lookouts, walking and cycling paths, picnic areas, a field of play and other community recreation facilities delivered in stages.
Employment
AreaSearch analysis reveals Asquith - Mount Colah recording weaker employment conditions than most comparable areas nationwide
Asquith - Mount Colah has a highly educated workforce with significant representation in the technology sector. The unemployment rate here was 7.0% as of December 2025. In that month, 12,483 residents were employed, which is 2.8% higher than Greater Sydney's unemployment rate of 4.2%.
Workforce participation in Asquith - Mount Colah is similar to Greater Sydney's at 68.8%. According to Census responses, 48.9% of residents 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 sectors. 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% compared to the regional average of 5.3%. Over the 12 months to December 2025, labour force levels increased by 1.1%, while employment declined by 0.5%, 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%. Jobs and Skills Australia's 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, based on a simple weighting extrapolation for illustrative purposes.
Frequently Asked Questions - Employment
Income
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 having a median of $60,817 and an average of $83,003. Based on Wage Price Index growth of 10.32% since financial year 2023, estimated incomes as of March 2026 would be approximately $69,558 (median) and $86,449 (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 (7,521 residents), similar to the metropolitan region where 30.9% fall into this bracket. A substantial proportion, 40.1%, earn above $3,000 weekly, 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 nationally. The area's SEIFA income ranking places it in the 9th decile.
Frequently Asked Questions - Income
Housing
Asquith - Mount Colah is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership
Asquith - Mount Colah's dwelling structures, 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. The median weekly rent figure was $500, compared to Sydney metro's $470. 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.
Frequently Asked Questions - Housing
Household Composition
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 comprise the remaining 17.6%, with lone person households at 15.9% and group households at 1.7%. The median household size is 2.9 people, larger than the Greater Sydney average of 2.7.
Frequently Asked Questions - Households
Local Schools & Education
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 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% currently enrolled in formal education.
This includes 10.5% in primary, 8.6% in secondary, and 5.8% in tertiary education.
Frequently Asked Questions - Education
Schools Detail
Nearby Services & Amenities
Transport
Transport servicing is good compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility
The analysis of public transportation in Asquith - Mount Colah indicates that there are 195 active transport stops operating within the area. These stops offer a mix of train and bus services, with 34 individual routes collectively providing 2,632 weekly passenger trips. The accessibility of these transport services is rated as excellent, with residents typically located 145 meters from the nearest stop. As a primarily residential area, most commuters travel outward, with the car remaining the dominant mode of transportation at 80%, while 13% use the train. Vehicle ownership averages 1.4 per dwelling, which is above the regional average. According to the 2021 Census, a high percentage of residents, specifically 48.9%, work from home, which may be partly due to COVID-19 conditions.
The service frequency across all routes averages 376 trips per day, equating to approximately 13 weekly trips per individual stop. A map accompanies the analysis, showing the 100 nearest stops to the location's centrepoint.
Frequently Asked Questions - Transport
Transport Stops Detail
Health
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 shows excellent results across Asquith - Mount Colah, based on AreaSearch's assessment.
Mortality rates and chronic condition prevalence are very low across all age groups. Private health cover is very high, with approximately 58% of the total population (~13,675 people). The most common medical conditions are asthma and mental health issues, affecting 7.4 and 7.0% of residents respectively. 73.5% of residents declare themselves completely clear of medical ailments, compared to 74.6% across Greater Sydney. Working-age residents have low chronic condition prevalence. The area has 16.0% of residents aged 65 and over (3,782 people). Health outcomes among seniors are strong but rank lower nationally than the broader population.
Frequently Asked Questions - Health
Cultural Diversity
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 ranks high in cultural diversity, with 30.1% of its residents speaking a language other than English at home and 37.1% born overseas. Christianity is the predominant religion, accounting for 46.4%. Notably, Judaism, at 0.4%, is overrepresented compared to Greater Sydney's 0.8%.
In terms of ancestry, the top three groups are English (23.5%), Australian (21.6%), and Other (12.8%). Some ethnic groups show significant variations: Korean is overrepresented at 1.3% (regional average 1.1%), Russian at 0.6% (0.4%), and Chinese at 7.4% (8.4%).
Frequently Asked Questions - Diversity
Age
Asquith - Mount Colah's population aligns closely with national norms in age terms
Asquith - Mount Colah has a median age of 40, which is higher than Greater Sydney's figure of 37 and Australia's figure of 38. The 45-54 age cohort is notably over-represented in Asquith-Mount Colah at 16.1%, compared to the Greater Sydney average, while the 25-34 age cohort is under-represented at 9.0%. Between 2021 and present, the 15-24 age group has grown from 12.0% to 13.7%, and the 45-54 cohort has increased from 14.8% to 16.1%. Conversely, the 25-34 cohort has declined from 10.9% to 9.0%, and the 0-4 age group has dropped from 6.1% to 5.0%. By 2041, demographic modeling suggests Asquith-Mount Colah's age profile will evolve significantly. The 55-64 age cohort is projected to expand by 726 people (27%), from 2,702 to 3,429. Notably, the combined 65+ age groups are expected to account for 58% of total population growth, reflecting the area's aging demographic profile. Meanwhile, the 5-14 and 0-4 age cohorts are expected to experience population declines.