St Agnes
Forty percent of St Agnes households own their home outright, a figure well above the national average and the single strongest signal about who lives here. With a median age of 44 (four years above the national figure) and an 82.2% five-year stay rate, this is a suburb dominated by long-settled owner-occupiers rather than a churn of new arrivals. Median house price reached $845,000 in 1Q 2026, up 10.1% from $767,500 a year prior. Population sits at 4,233 across 2.6 km2, and household income falls at the 49.6th percentile nationally, placing this in the middle of the income distribution despite the high ownership rates.
Population
4,233
Median Age
44.0
Household IncomeiMedian weekly household income (ABS Census)
$1,557/wk
DAs (12 months)iDevelopment Applications lodged in the past year
50
Median House
$845K
Median 1Q 2026
The $845,000 median house price in 1Q 2026 represents a 10.1% increase from $767,500 in 1Q 2025, a strong single-year gain. Separate houses dominate at 85.8% of all dwellings, with apartments accounting for 10.2% and semi-detached homes 4.1%. The bedroom breakdown is practical: 62% of homes have 3 bedrooms and 24.9% have 4 or more. Monthly mortgage repayments average $1,500, producing a mortgage-to-income ratio of 22.2%, below the 30% stress threshold. That relatively low repayment burden, compared to many metro markets, reflects the combination of modest median incomes and a price point that, while high for SA, remains far below Sydney or Melbourne equivalents. Outright owners at 40.1% outnumber mortgage holders at 42.7%, suggesting an established, long-tenure buyer base.
For Buyers
The $845,000 median house price in 1Q 2026 represents a 10.1% increase from $767,500 in 1Q 2025, a strong single-year gain. Separate houses dominate at 85.8% of all dwellings, with apartments accounting for 10.2% and semi-detached homes 4.1%. The bedroom breakdown is practical: 62% of homes have 3 bedrooms and 24.9% have 4 or more. Monthly mortgage repayments average $1,500, producing a mortgage-to-income ratio of 22.2%, below the 30% stress threshold. That relatively low repayment burden, compared to many metro markets, reflects the combination of modest median incomes and a price point that, while high for SA, remains far below Sydney or Melbourne equivalents. Outright owners at 40.1% outnumber mortgage holders at 42.7%, suggesting an established, long-tenure buyer base.
For Investors
Rental demand in St Agnes is thin by most measures. Only 17.2% of households rent, well below the national average, and weekly rent sits at $340. The vacancy rate of 4.3% is above typical landlord-comfort levels, signalling that supply and demand are roughly in balance at best. Development activity shows 44 applications in the past 12 months, a moderate volume for a 2.6 km2 suburb with few greenfield sites. The 10.1% price growth from $767,500 to $845,000 in a single year is a positive capital-growth signal, but gross yield at current rent and median price is under 2.1%, which is low compared to higher-rental suburbs. The 82.2% resident-stay rate limits tenant turnover, which reduces vacancy risk but also constrains the active rental pool.
Development Activity
Total DAs
236
Last 12 Months
50
YoY ChangeiYear-over-year change in DA lodgements
+38.9%
Avg DA CostiAverage estimated cost per DA in the past year
N/A
Monthly DA Lodgements
DA Categories
Schools in St Agnes iICSEA: school advantage index. 1000 = national avg, higher = more advantaged
Ardtornish Primary School
R-6 · 462 students
St Agnes School P - 6
R-6 · 251 students
Demographics
The median age of 44 sits four years above the national figure, consistent with the suburb's long-tenure ownership profile. Overseas-born residents make up 24.7%, which is 3.1 percentage points above the national average. English ancestry is the leading group at 1,755 residents, followed by German (405) and Italian (377), reflecting SA's colonial and post-war migration history. University qualifications reach 30.4%, just 0.3 percentage points above the national rate, indicating an average rather than highly educated workforce. Average household size is 2.4, marginally below the national figure. The volunteering rate of 16.5% is a notable community-participation indicator. Couples with children (1,247 families) slightly outnumber couples without children (1,013), which aligns with the 3-bedroom-dominant housing stock.
Age Distribution
Bedrooms
Dwelling Structure
85.8%
Houses
4.1%
Townhouse
10.2%
Apartment
Tenure
Tenure is split between outright owners (40.1%) and mortgage holders (42.7%), with renters at a low 17.2%. The ownership skew reflects the suburb's older median age of 44 and high stay rate, because long-term residents accumulate equity and pay down debt over decades. Separate houses make up 85.8% of stock, apartments 10.2%, and semi-detached homes 4.1%, a strongly detached-dominant profile by national standards. Three-bedroom homes account for 62% of the market, with 4-plus bedrooms at 24.9%. The median house price climbed from $767,500 to $845,000 between 1Q 2025 and 1Q 2026, a 10.1% gain. Mortgage-to-income at 22.2% and rent-to-income at 21.8% both sit below the 30% stress threshold, indicating affordable holding costs relative to local incomes.
Median House Price Trend
Source: State Valuer-General
Mortgage / mo
$1,500
Rent / wk
$340
HH Size
2.4
Personal Income / wk
$746
Vacancy Ratei% of dwellings unoccupied on Census night (ABS 2021)
4.3%
Unoccupied
75
Rent / IncomeiMedian rent as % of household income. Over 30% = housing stress
21.8%
Mortgage / IncomeiMedian mortgage as % of household income. Over 30% = housing stress
22.2%
Community Profile
Languages Spoken at Home
Ancestry
Household Composition
30.1%
Couples, no children
3,366
Total families
Economy & Employment
Healthcare is the dominant industry at 20.3% of employed residents (284 workers), well ahead of Education at 12.6% (177) and Public Administration at 9.9% (139). Construction at 8.2% and Manufacturing at 7.7% round out the top five, giving St Agnes a mixed white-collar and trades workforce. By occupation, Professionals (441) lead, followed by Clerical and Admin (343) and Community and Personal Services (241), with Managers at 203. The unemployment rate is 4.0%, close to the state and national rate, with full-time employment at 62.7% of those employed. Household income sits at the 49.6th percentile nationally, in the middle of the distribution. SEIFA IRSD decile 6 and IRSAD decile 5 place St Agnes in the lower half of advantage nationally, though not in a disadvantaged tier.
Socio-Economic Indexes (SEIFA)iABS index ranking suburbs from 1 (most disadvantaged) to 10 (most advantaged)
Full-time
62.7%
Part-time
33.3%
Participation
57.5%
Employed
1,952
Occupations
Top Industries
University
30.4%
Postgraduate
6.2%
Born Overseas
24.7%
Dwellings
1,653
Transport to Work
Car dependency is high at 85.3% of commuters driving, compared to only 8.5% using public transport and 2.5% walking or cycling. This is above the national reliance on private vehicles and reflects a suburban layout without a dense transit spine. The crime rate is 55.3 incidents per 1,000 residents, based on 234 total incidents, but direct comparison is limited without category breakdowns. SEIFA IRSD decile 6 places the suburb in the lower-middle range nationally for relative disadvantage, while IRSAD decile 5 reflects a similar position on advantage. Housing stress is absent by two measures: mortgage-to-income at 22.2% and rent-to-income at 21.8% both sit below the 30% threshold, meaning residents are not financially stretched by housing costs. No schools are recorded inside the suburb boundary, so families rely on neighbouring areas for primary and secondary education.
Drive
85.3%
Public Transport
8.5%
Walk / Cycle
2.5%
Work from Home
N/A
Safety & Crime
Total Offences
234
Year ending June 2024
Rate per 1,000 People
55.3
Source: Crime Statistics Agency Victoria / SA Police
National Ranking iPercentile rank among ~15,000 AU suburbs. 90% = higher than 90% of suburbs
How St Agnes compares to ~15,000 Australian suburbs
Frequently Asked Questions
Is St Agnes a good suburb to live in?
St Agnes suits owner-occupying families well. The mortgage-to-income ratio is 22.2%, below the stress threshold, and 40.1% of households own their home outright. The median age of 44 and an 82.2% five-year stay rate point to a stable, settled community. The main trade-off is high car dependency at 85.3%, with limited public transport at 8.5%.
What is the median house price in St Agnes?
The median house price was $845,000 in 1Q 2026, up 10.1% from $767,500 in 1Q 2025. Monthly mortgage repayments average $1,500 and weekly rent runs at $340. The mortgage-to-income ratio of 22.2% is below the 30% stress level, making St Agnes relatively affordable compared to equivalent Sydney or Melbourne markets.
What schools are in St Agnes?
No schools are recorded inside the St Agnes suburb boundary in this dataset. Families rely on schools in neighbouring suburbs. At a local level, university qualifications reach 30.4% of residents, slightly above the national average of 30.1%, suggesting the surrounding area supports reasonable educational attainment.
Is St Agnes safe?
Recorded crime totals 234 incidents, giving a rate of 55.3 per 1,000 residents. No category breakdown is available for direct comparison. As a broader indicator, SEIFA IRSD decile 6 places St Agnes in the lower-middle range nationally for relative disadvantage, and only 8.3% of residents (342 people) require assistance with daily activities.
Is St Agnes good for property investment?
The 10.1% price growth from $767,500 to $845,000 in a single year is positive for capital gains, but the investment case has limits. Only 17.2% of households rent, weekly rent is $340, and the vacancy rate of 4.3% is above comfortable landlord levels. Gross yield at current rent and median price is below 2.1%, which is low compared to higher-rental SA suburbs.
How is St Agnes's population changing?
The current population is 4,233 with a density of 1,628 per km2. The 82.2% five-year stay rate indicates very low residential turnover, meaning the suburb grows primarily through natural increase rather than net migration. The older median age of 44 (four years above the national figure) suggests the population is aging gradually rather than being renewed by younger arrivals.
How much development is happening in St Agnes?
There were 44 development applications lodged in the past 12 months. Recent examples include a two-storey detached dwelling and outbuilding approvals, indicating active reinvestment in the existing detached housing stock. At 44 applications across a 2.6 km2 suburb, this is a moderate activity level consistent with an established, in-fill rather than greenfield market.
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 Valuer-General (house prices), Department of Jobs SALM (unemployment), ACARA (school ICSEA), 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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