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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
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Population
Population growth drivers in St Marys - North St Marys are strong compared to national averages based on AreaSearch's ranking of recent, and medium to long-term trends
St Marys - North St Marys' population is approximately 18,867 as of May 2026. This figure represents an increase of 1,542 people, or 8.9%, since the 2021 Census, which reported a population of 17,325. The change is inferred from the estimated resident population of 18,757 in June 2025 and an additional 419 validated new addresses since the Census date. This results in a population density ratio of 1,467 persons per square kilometer, higher than the average across national locations assessed by AreaSearch. St Marys - North St Marys' growth rate exceeded that of its SA3 area (5.4%) and SA4 region, making it a growth leader in the region. Overseas migration contributed approximately 64.5% of overall population gains during recent periods.
AreaSearch uses ABS/Geoscience Australia projections for each SA2 area, released in 2024 with 2022 as the base year. For areas not covered by this data, NSW State Government's SA2 level projections are used, released in 2022 with 2021 as the base year. Growth rates by age group from these aggregations are applied to all areas for years 2032 to 2041. By 2041, a significant population increase is forecasted, with the area expected to grow by 4,189 persons, reflecting an overall increase of 21.6% over the 16-year period based on the latest annual ERP population numbers.
Frequently Asked Questions - Population
Development
AreaSearch assessment of residential development activity positions St Marys - North St Marys among the top 25% of areas assessed nationwide
North St Marys has averaged approximately 160 new dwelling approvals per year. Over the past five financial years, from FY21 to FY25, around 800 homes were approved, with an additional 86 approved so far in FY26. On average, about 1.6 new residents arrived per new home over these five years, suggesting a balanced supply and demand creating stable market conditions. However, recent data shows this ratio has intensified to 5.3 people per dwelling over the past two financial years, indicating growing popularity and potential undersupply.
New homes are being built at an average expected construction cost of $212,000, which is under regional levels, providing more accessible housing choices for buyers. This year alone, $92.5 million in commercial approvals have been registered, suggesting robust local business investment. Compared to Greater Sydney, North St Marys has 93.0% more construction activity per person, offering ample choice for buyers despite recent moderation in development activity. Recent construction comprises 26.0% detached dwellings and 74.0% townhouses or apartments, marking a significant shift from the existing housing pattern of 61.0% houses. This trend suggests diminishing developable land availability and responds to evolving lifestyle preferences and housing affordability needs. With around 208 people per dwelling approval, North St Marys shows characteristics of a growth area.
Population forecasts indicate it will gain approximately 4,079 residents by 2041, with present construction rates appearing balanced with future demand, fostering steady market conditions without excessive price pressure.
Frequently Asked Questions - Development
Development applications around St Marys - North St Marys
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SOURCE: Planning portals and council registers, compiled by AreaSearch. Distance & bearing measured from the suburb midpoint.
Infrastructure
St Marys - North St Marys has very high levels of nearby infrastructure activity, ranking in the top 20% nationally
The performance of a region is significantly influenced by changes in local infrastructure, major projects, and planning initiatives. AreaSearch has identified 37 such projects that are expected to impact the area. Notable projects include Western Sydney Aerotropolis Infrastructure and Development, St Marys Station Upgrade and Metro Integration, Luddenham Metro Station and Sydney Science Park, and St Marys Central Park. The following list details those projects likely to be most relevant.
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INFRASTRUCTURE SEARCH
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Frequently Asked Questions - Infrastructure
Western Sydney Aerotropolis Infrastructure and Development
An 11,200-hectare economic and urban transformation precinct on the doorstep of the new Western Sydney International (Nancy-Bird Walton) Airport. The Aerotropolis is being delivered through a coordinated $28 billion-plus government investment by the NSW and Australian Governments in enabling infrastructure, alongside private sector proposals which had grown to around $33 billion by December 2025 and continue to climb. Anchor projects include Bradfield City Centre (114 hectares with 10,000 future homes and 20,000 jobs), the Advanced Manufacturing Readiness Facility (AMRF), the toll-free M12 Motorway which opened on 14 March 2026, the Sydney Metro Western Sydney Airport line (now expected to open mid-to-late 2027 with a free interim bus service from 5 July 2026), and major upgrades to Mamre Road, Elizabeth Drive and Fifteenth Avenue. Sydney Water is delivering the Upper South Creek Advanced Water Recycling Centre and progressing the Aerotropolis Integrated Stormwater Schemes for the Wianamatta Badgerys, Cosgroves and Duncans Mulgoa catchments, with finalisation in early 2026 and Development Servicing Plan exhibition in Q2 2026. Bradfield Central Park construction is due to begin in the second half of 2026, with FDC Construction & Fitout appointed as head contractor in early 2026. The precinct is targeting more than 100,000 long-term jobs across advanced manufacturing, freight and logistics, aerospace and defence, agribusiness, healthcare, education and research.
The Quarter - Penrith Health and Education Precinct
The Quarter is a 400-hectare specialized health and education precinct in Western Sydney, integrating Nepean Public and Private Hospitals, Western Sydney University, and TAFE NSW. The centerpiece is the $1 billion Nepean Hospital Redevelopment. Stage 2 is currently in the final year of construction, involving a seven-story clinical building featuring an expanded ICU, medical imaging, nuclear medicine, and a neonatal intensive care unit. As of March 2026, the main entry and facade are complete, with internal fit-out and road upgrades on Barber Avenue progressing toward an expected late 2026 completion.
Luddenham Metro Station and Sydney Science Park
Luddenham Metro Station is a key elevated station on the 23-kilometre Sydney Metro Western Sydney Airport line. As of May 2026, construction is in an advanced stage with fa‡ade works, station precinct landscaping, and installation of lighting and mechanical systems underway. The station serves as the primary transport link for the adjacent Sydney Science Park, a 280-hectare $2 billion mixed-use innovation hub by Celestino. The Science Park is designed as a premier destination for research and development in food, energy, and health, integrating thousands of future homes with commercial and educational facilities.
St Marys Town Centre Master Plan
A 20-year strategic framework for the renewal of St Marys Town Centre, formally endorsed by Penrith City Council on 3 March 2025. New planning controls came into effect on 6 February 2026 via the State Environmental Planning Policy Amendment (St Marys Town Centre) 2026 and amendments to the Penrith Local Environmental Plan 2010, followed by amendments to Chapter E15 of the Penrith Development Control Plan 2014 on 11 February 2026. The Master Plan facilitates around 9,307 new dwellings and 8,360 new jobs by 2041, with the population projected to grow from 3,500 to 25,500. It leverages the new Sydney Metro - Western Sydney Airport station and includes the multi-million-dollar St Marys Central Park (amalgamating Coachmans and Kokoda Parks), a new civic precinct with library and community hub, upgraded active transport links, public domain improvements, stormwater works and a 24-hour commercial core. A Section 7.12 Development Contributions Plan with a 4 percent levy will fund over 235 million dollars of supporting local infrastructure.
St Marys Station Upgrade and Metro Integration
A major transport interchange project integrating the existing T1 Western Line with the new Sydney Metro Western Sydney Airport line. Key features include a new underground metro station, a 55-metre-long pedestrian concourse and footbridge, a northern pedestrian plaza, and a multi-storey commuter car park with over 250 additional spaces. The project serves as a vital gateway for the Western Parkland City, providing seamless transfers between suburban rail, metro, and bus services.
Werrington Mixed-Use Precinct (Stockland & WSU)
A proposed 99-hectare mixed-use precinct on Western Sydney University's Penrith campus land, being developed by Stockland under a Project Delivery Agreement with WSU as part of the university's Western Growth strategy. The masterplan includes new housing, over 18 hectares of open space, a cultural arts and heritage quarter, retail and commercial space, and a living laboratory for education, research and innovation. The project was listed as a 2025 State Significant Rezoning site by the NSW Department of Planning, Housing and Infrastructure, with state-led assessment underway to accelerate the rezoning process.
M12 Motorway
16-kilometre east-west motorway connecting the M7 Motorway at Cecil Hills to The Northern Road at Luddenham, providing direct access to Western Sydney International Airport. Features a four-lane divided motorway with provision for up to six lanes, multiple bridges, interchanges, and a shared user path.
Glenmore Village
Glenmore Village is a completed mixed-use development providing a convenient shopping and service destination in Western Sydney. It features over 8300sqm of retail space including a supermarket, medical precinct, childcare centre, gym, specialty retail, and casual dining, accompanied by 145 luxury apartments. The development includes ground floor and secure basement parking, offering a high street style retail environment.
Employment
Employment conditions in St Marys - North St Marys face significant challenges, ranking among the bottom 10% of areas assessed nationally
St Marys - North St Marys has a skilled workforce with manufacturing and industrial sectors well-represented. As of December 2025, the unemployment rate is 9.0%. In this month, 8,226 residents are employed while the unemployment rate is 4.9% higher than Greater Sydney's rate of 4.2%, indicating room for improvement.
Workforce participation in St Marys - North St Marys lags behind Greater Sydney at 60.5% compared to 68.8%. According to Census responses, 23.1% of residents work from home. Leading employment industries among residents are health care & social assistance, retail trade, and construction. The area has a notable concentration in transport, postal & warehousing with employment levels at 2.1 times the regional average.
However, professional & technical services have limited presence with only 3.9% employment compared to the regional average of 11.5%. Many residents commute elsewhere for work based on Census data comparing working population to local population. Over the year ending December 2025, labour force levels decreased by 4.5%, and employment declined by 3.3%, causing a fall in unemployment rate by 1.1 percentage points. In contrast, Greater Sydney saw employment growth of 2.2% and labour force expansion of 2.3%. Jobs and Skills Australia's national employment forecasts from May-25 project national employment growth at 6.6% over five years and 13.7% over ten years. Applying these projections to St Marys - North St Marys' employment mix suggests local employment should increase by 6.2% over five years and 13.0% over ten years, based on a simple weighting extrapolation for illustrative purposes.
Frequently Asked Questions - Employment
Income
Income levels sit below national averages according to AreaSearch assessment
AreaSearch's latest postcode level ATO data for financial year ending June 2023 shows that median income in St Marys - North St Marys SA2 is $56,004. Average income stands at $60,381. This contrasts with Greater Sydney's median income of $60,817 and average income of $83,003. Based on Wage Price Index growth of 10.32% from July 2023 to March 2026, estimated incomes would be approximately $61,784 (median) and $66,612 (average). According to the 2021 Census, household, family, and personal incomes in St Marys - North St Marys rank modestly, between the 28th and 31st percentiles. The earnings profile shows that 34.1% of residents earn $1,500-$2,999 weekly. Housing affordability pressures are severe, with only 78.0% of income remaining after housing costs, ranking at the 20th percentile.
Frequently Asked Questions - Income
Housing
St Marys - North St Marys displays a diverse mix of dwelling types, with a higher proportion of rental properties than the broader region
St Marys - North St Marys dwelling structures, as per the latest Census, consisted of 61.2% houses and 38.8% other dwellings (including semi-detached, apartments, 'other' dwellings). This compares to Sydney metro's figures of 55.9% houses and 44.1% other dwellings. Home ownership in St Marys - North St Marys stood at 19.3%, with mortgaged dwellings at 26.2% and rented ones at 54.5%. The median monthly mortgage repayment was $1,842, below Sydney metro's average of $2,427. Median weekly rent in the area was $360, compared to Sydney metro's $470. Nationally, St Marys - North St Marys had lower mortgage repayments ($1,842 vs Australia's $1,863) and rents ($360 vs national average of $375).
Frequently Asked Questions - Housing
Household Composition
St Marys - North St Marys features high concentrations of group households and lone person households, with a lower-than-average median household size
Family households constitute 65.6% of all households, including 27.4% couples with children, 17.5% couples without children, and 18.7% single parent families. Non-family households comprise the remaining 34.4%, with lone person households at 30.2% and group households making up 4.2%. The median household size is 2.5 people, which is smaller than the Greater Sydney average of 2.7.
Frequently Asked Questions - Households
Local Schools & Education
St Marys - North St Marys faces educational challenges, with performance metrics placing it in the bottom quartile of areas assessed nationally
The area's university qualification rate is 18.8%, significantly lower than Greater Sydney's average of 38.0%. This discrepancy presents both a challenge and an opportunity for targeted educational initiatives. Bachelor degrees are the most common at 13.0%, followed by postgraduate qualifications (4.7%) and graduate diplomas (1.1%). Vocational credentials are prominent, with 35.7% of residents aged 15+ holding them, including advanced diplomas (9.8%) and certificates (25.9%).
Educational participation is high, with 33.5% of residents currently enrolled in formal education. This includes 12.6% in primary education, 8.3% in secondary education, and 4.4% pursuing tertiary education.
Frequently Asked Questions - Education
Schools Detail
Nearby Services & Amenities
Transport
Transport servicing is high compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility
St Marys - North St Marys has 160 active public transport stops offering a mix of train and bus services. These stops are served by 49 individual routes, collectively facilitating 8,248 weekly passenger trips. Transport accessibility is rated excellent with residents typically located 157 meters from the nearest stop. The area, predominantly residential, sees most residents commuting outward. Cars remain the dominant mode of transport at 82%, while train usage stands at 10%. Vehicle ownership averages 1.0 per dwelling, below the regional average.
According to the 2021 Census, 23.1% of residents work from home, a figure potentially influenced by COVID-19 conditions. Service frequency averages 1,178 trips per day across all routes, translating to approximately 51 weekly trips per individual stop. An accompanying map displays the 100 nearest stops to the location's centrepoint.
Frequently Asked Questions - Transport
Transport Stops Detail
Health
Health performance in St Marys - North St Marys is a key challenge with a range of health conditions having marked impacts on both younger and older age cohorts
St Marys - North St Marys faces significant health challenges, as assessed by AreaSearch through mortality rates and chronic condition prevalence. Multiple health conditions affect both younger and older age groups. Private health cover is relatively low at approximately 49% of the total population (around 9,282 people), compared to 59.9% in Greater Sydney and a national average of 55.7%.
The most prevalent medical conditions are asthma and mental health issues, affecting 8.7% and 8.4% of residents respectively. Conversely, 67.6% of residents report having no medical ailments, compared to 74.6% in Greater Sydney. Working-age residents face notable health challenges due to higher chronic condition rates. The area has 13.6% of residents aged 65 and over (2,562 people), lower than the 15.5% in Greater Sydney. Health outcomes among seniors present some challenges, generally aligning with national rankings for the overall population.
Frequently Asked Questions - Health
Cultural Diversity
St Marys - North St Marys 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
St Marys-North St Marys has a high level of cultural diversity, with 34.2% of its population born overseas and 31.1% speaking a language other than English at home. Christianity is the predominant religion in St Marys-North St Marys, comprising 57.7% of the population. Hinduism is overrepresented compared to Greater Sydney, making up 4.8% versus 2.0%.
The top three ancestry groups are Australian (20.8%), English (19.8%), and Other (17.5%). Notably, Samoan (2.7%) and Filipino (4.7%) populations are overrepresented compared to regional averages of 0.5% and 2.0%, respectively. Maori population is also higher at 1.5%.
Frequently Asked Questions - Diversity
Age
St Marys - North St Marys's population is younger than the national pattern
St Marys - North St Marys has a median age of 35 years, which is slightly younger than Greater Sydney's 37 and the national average of 38 years. The 0-4 age group comprises 7.3%, compared to Greater Sydney, while the 75-84 cohort is less prevalent at 4.3%. Between 2021 and present, the 15-24 age group has increased from 12.3% to 13.6% of the population. Conversely, the 45-54 cohort has decreased from 12.0% to 11.4%. By 2041, population forecasts indicate significant demographic changes for St Marys - North St Marys. The 75-84 age cohort is projected to rise substantially by 598 people (74%), from 811 to 1,410. Meanwhile, the 0-4 cohort grows by a modest 7% (99 people).