North St Marys
A 55.4% renter share sits alongside 96.3% separate houses in North St Marys, giving it a more rental-heavy profile than many detached-house suburbs. Its 4,123 residents have a median age of 35, five years below national, while household income ranks at the 27.9th percentile. Overseas-born residents account for 24.8%, 3.2 points above national, while English ancestry is recorded for 1,175 people. Compared with nearby St Marys and Werrington, the suburb is defined more by low-rise housing, car-based commuting and practical family demand than high-income repositioning. It suits buyers and renters seeking detached homes, but mortgage pressure matters because repayments reach $1,800 monthly and 33.1% of income.
Population
4,123
Median Age
35.0
Household IncomeiMedian weekly household income (ABS Census)
$1,255/wk
DAs (12 months)iDevelopment Applications lodged in the past year
60
Homebuyers face a low-rise, family-oriented market: 96.3% of dwellings are separate houses, 56.9% have 3 bedrooms and 23.8% have 4 or more. That layout suits households needing space, especially as couples with children make up 38.0% of families. The financial trade-off is material: household income ranks at the 27.9th percentile, mortgage repayments average $1,800 monthly and mortgage stress reaches 33.1% of income. Weekly rent of $340 lets buyers test streets and commuting before committing. Compared with nearby St Marys, North St Marys has a more consistent detached-house form, but 55.4% renting means competition for suitable homes can remain strong. Only 21.6% own outright, so inspect land size, upkeep and future borrowing capacity.
For Buyers
Homebuyers face a low-rise, family-oriented market: 96.3% of dwellings are separate houses, 56.9% have 3 bedrooms and 23.8% have 4 or more. That layout suits households needing space, especially as couples with children make up 38.0% of families. The financial trade-off is material: household income ranks at the 27.9th percentile, mortgage repayments average $1,800 monthly and mortgage stress reaches 33.1% of income. Weekly rent of $340 lets buyers test streets and commuting before committing. Compared with nearby St Marys, North St Marys has a more consistent detached-house form, but 55.4% renting means competition for suitable homes can remain strong. Only 21.6% own outright, so inspect land size, upkeep and future borrowing capacity.
For Investors
Investors are targeting a renter-majority market, with 55.4% renting and weekly rent at $340. A 5.4% vacancy rate gives tenants some choice, so yield assumptions should allow for leasing time and property condition rather than relying on automatic rent growth. The 96.3% separate-house share can support demand from families, while 56.9% of homes have 3 bedrooms and 38.0% of families include children. Development activity is notable at 55 applications in 12 months, including a secondary dwelling and general industry, which may add supply or change local amenity. Compared with a tighter-vacancy market, this is a more management-sensitive proposition. Overseas migration is the primary forecast driver and annual growth is 1.3%, but gentrification is classified as Not gentrifying with a score of 18, favouring durable tenant demand over speculative uplift.
Development Activity
Total DAs
191
Last 12 Months
60
YoY ChangeiYear-over-year change in DA lodgements
+93.5%
Avg DA CostiAverage estimated cost per DA in the past year
N/A
Monthly DA Lodgements
DA Categories
Schools in North St Marys
Open-register school locations for education access. This is not a school-quality ranking.
Demographics
North St Marys is younger than the national profile, with a median age of 35, or 5 years below national. Average household size is 2.7, 0.2 above national, consistent with a family presence: couples with children account for 38.0% of families, while one-parent families account for 34.6%. English ancestry is the largest named ancestry at 1,175 people, followed by Scottish at 235 and Irish at 220. Overseas-born residents make up 24.8%, 3.2 points above national, with Arabic, Samoan and Mandarin among the most recorded languages. University attainment is 15.5%, 14.6 percentage points below national, helping explain the concentration in machinery, driving, labouring and trade occupations. Compared with nearby St Marys, the suburb is more detached-house and lower-income oriented, supporting demand for practical family rentals.
Age Distribution
Bedrooms
Dwelling Structure
96.3%
Houses
1.7%
Townhouse
0.9%
Apartment
Tenure
Housing in North St Marys is low-rise but tenure is renter-heavy. Separate houses represent 96.3% of dwellings, versus 0.9% apartments and 1.7% semi-detached homes. Yet only 21.6% of residents own outright and 22.2% have a mortgage, while 55.4% rent. The bedroom mix is concentrated in 3-bedroom homes at 56.9%, with 23.8% having 4 or more, so stock is better aligned with families than singles seeking compact apartments. Weekly rent is $340 and rent absorbs 27.1% of household income, below the 33.1% mortgage burden recorded for owners under stress. Compared with nearby St Marys, North St Marys has a more detached physical form, but its renter share is the stronger market signal. Affordability moved from 56.2 in 2011 to 50.3 in 2021, with the trend classified as Improving.
Mortgage / mo
$1,800
Rent / wkiMedian weekly rent for new bonds (April to June 2026), NSW Rental Bond Board (DCJ). Census 2021 median: $340.
$590
Bond data Jun 2026 · houses $600 · units $500
HH Size
2.7
Personal Income / wk
$597
Vacancy Ratei% of dwellings unoccupied on Census night (ABS 2021)
5.4%
Unoccupied
76
Rent / IncomeiMedian rent as % of household income. Over 30% = housing stress
27.1%
Mortgage / IncomeiMedian mortgage as % of household income. Over 30% = housing stress
33.1% stressed
Community Profile
Languages Spoken at Home
Ancestry
Household Composition
38.0%
Couples with children
25.4%
Couples, no children
34.6%
Single parent
952
Total families
Economy & Employment
North St Marys has a practical employment base shaped by healthcare, construction, public administration, transport and education, which account for 18.9%, 10.4%, 8.9%, 8.5% and 8.2% of listed industry employment respectively. The occupational mix reinforces that pattern: machinery and drivers number 248, labourers 189, clerical and administrative workers 178, community and personal service workers 155, and trades workers 154. Labour-force participation is 44.3%, full-time employment is 56.4%, and unemployment is 8.9%. Household income ranks at the 27.9th percentile, while all four published SEIFA deciles are 1: IEO, IER, IRSD and IRSAD. These measures point to constrained household budgets, although healthcare and public services can provide steadier demand than more cyclical sectors. Compared with higher-decile western Sydney suburbs, purchasing power and socioeconomic resilience are lower.
Unemployment
8.9%
Labour Force
1,440
Unemployed
128
Source: ABS Census 2021
Socio-Economic Indexes (SEIFA)iABS index ranking suburbs from 1 (most disadvantaged) to 10 (most advantaged)
Full-time
56.4%
Part-time
28.8%
Participation
44.3%
Employed
1,312
Full-time and part-time are shares of the employed. Source: ABS Census 2021
Occupations
Top Industries
University
15.5%
Postgraduate
3.6%
Born Overseas
24.8%
Dwellings
1,338
Transport to Work
Livability is practical and car-oriented. Car driving accounts for 67.1% of commuting, compared with 3.2% using public transport and 2.6% walking or cycling, while 20.7% work from home. That pattern matters because daily errands and wider employment access are likely to depend more on road connections than local rail or active travel. Two local government schools provide primary and secondary options, including St Marys North Public School and Chifley College Dunheved Campus. Check enrolment zones against the exact address, since they can differ from suburb boundaries. Review recent incidents, lighting, traffic and activity around the home before choosing a property. SEIFA IRSAD and IRSD are both in decile 1, below higher-decile suburbs, indicating substantial socioeconomic disadvantage that can affect services and household resilience. Compared with more transit-oriented parts of western Sydney, North St Marys suits residents comfortable with driving.
Drive
67.1%
Public Transport
3.2%
Walk / Cycle
2.6%
Work from Home
20.7%
Population Forecast
+1.3%/yr
(+243 people/yr)
EstablishedGrowth across North St Marys is forecast at 1.3% annually, with overseas migration named as the primary driver. The trajectory is Stable, while population change across the wider area is 18.3% over 10 years. Current gentrification is classified as Not gentrifying, with a score of 18, although the shift signal is scored at 41 and labelled Early signs. That combination suggests incremental change rather than a clear reinvention, because established housing and lower household incomes still shape demand. Affordability is classified as Improving, real income growth is 21.3% and rent growth is 33.3%, creating some support for household turnover. Compared with a rapid expansion corridor, North St Marys is more likely to experience steady infill and gradual tenure change. The 55 development applications recorded over 12 months add a local supply and amenity watchpoint.
Historical + Forecast
Hamilton-Perry + Holt smoothing on ERP 2001-2025
Age Cohort Forecast
Primary Driver
Overseas Migration
Net Overseas / yr
+206
Net Internal / yr
-8
Gentrification Signal
Not gentrifying
Population +24% since 2011, Strong overseas inflow +206/yr
National Ranking iPercentile rank among ~15,000 AU suburbs. 90% = higher than 90% of suburbs
How North St Marys compares to ~15,000 Australian suburbs
Frequently Asked Questions
Is North St Marys a good suburb to live in?
It can suit households seeking detached housing and practical rents, with 96.3% separate houses, $340 weekly rent and 67.1% car commuting. The trade-offs are 55.4% renting, 8.9% unemployment and IRSAD decile 1, so inspect the exact street and commute before deciding.
What is the median house price in North St Marys?
For a current price guide, compare recent settled sales rather than relying on one listing. North St Marys has 96.3% separate houses, 55.4% renters and $340 weekly rent, giving useful context when judging affordability against nearby St Marys and Werrington.
What schools are in North St Marys?
The local mix includes St Marys North Public School for primary students and Chifley College Dunheved Campus for secondary students, both government schools. Confirm the catchment for the exact address, enrolment availability and transport options, especially for families represented by 38.0% of households.
Is North St Marys safe?
Safety should be checked at street level by reviewing recent incidents, lighting, traffic and activity around the home, then comparing nearby streets before signing. North St Marys has 4,123 residents and a 19.9% turnover rate, so local conditions and neighbourhood activity can vary.
Is North St Marys good for property investment?
It can suit investors targeting family-oriented rental demand: 55.4% rent, $340 weekly rent, 96.3% separate houses and 5.4% vacancy. However, 55 development applications in 12 months may alter supply, and gentrification is classified as Not gentrifying with a score of 18. Assess yield, maintenance and tenant depth rather than assuming rapid price growth.
How is North St Marys's population changing?
North St Marys has 4,123 residents today. The wider-area forecast records 18.3% population change over 10 years and an annual growth trend of 1.3%, with overseas migration the primary driver. The trajectory is Stable, so change is more likely to be gradual than a sudden expansion.
What development is occurring in North St Marys?
Development activity is notable, with 55 applications in 12 months, including a secondary dwelling, demolition and general industry. This may improve housing choice or alter traffic and amenity, so buyers should check the immediate street for construction, access and future overlooking before purchasing.
How to read these comparisons
Phrases like "above the national average" reference the unweighted median across Australian suburbs with more than 1,000 residents, not population-weighted national figures. Suburb-level medians are more useful for ranking suburbs against each other; ABS census headlines are population-weighted (so dominated by Sydney and Melbourne) and can read very differently.
Current baseline (refreshed 2026-05-10): median age 40, university-educated 30.1%, born overseas 21.6%, average household size 2.5 people.
Data sources: ABS 2021 Census (demographics, income, tenure), state education open registers (school locations), state Crime Statistics agencies (offences), council DA portals (development applications). Population forecasts use a Hamilton-Perry cohort model calibrated to ABS ERP.
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