St Agnes SA

Postcode 5097 · Tea Tree Gully LGA

St Agnes is a smaller suburb in South Australia within the Tea Tree Gully local government area (postcode 5097). With a population of 4,233, the suburb has an established demographic with a median age of 44. Households earn a median income of $81K per year, with an average household size of 2.4 people. The most common occupations are professionals, clerical & administrative, technicians & trades. The top ancestries reported are English, Australian, German.

The median house price in St Agnes is $892,000, having grown strongly 8% over the past year. Units have a median price of $485,000 (+15.5% YoY). The current median weekly rent is $580. This gives a gross rental yield of approximately 3.4%. The median monthly mortgage repayment is $1,500.

St Agnes is served by 2 schools, including 2 primary. The average ICSEA score is 1042, which is around the national average of 1,000. Public transport access includes 28 bus stops. The crime rate in the Tea Tree Gully LGA is moderate at 5,528 incidents per 100,000 population.

From an investment perspective, St Agnes offers a gross rental yield of 3.4%, rated as moderate yield. Property prices are near the state median ($892K/$950K). The price-to-income ratio of 11.0x is considered stretched. House prices have moved +8.0% year-on-year.

INVESTMENT SIGNALS
Rental Yield3.4% Moderate Yield
Price vs State$892K/$950K Near Median
Affordability11.0x Stretched
Price Momentum+8.0% Rising
INCOME (ATO 2022-23)
Median Income$57,585
Mean Income$63,629
Earners8,448
YoY Change+4.3%
SEIFA INDEX (ABS)
Advantage6/10
Education5/10
Economic4/10
Disadvantage5/10
MEDIAN HOUSE
$892K
8% YoY
MEDIAN UNIT
$485K
15.5% YoY
MEDIAN RENT /WK
$340
POPULATION
4,233
DEMOGRAPHICS
Median Age44
Household Size2.4
HH Income /wk$1,557
Personal Income /wk$746
Mortgage /mth$1,500
CRIME (Tea Tree Gully LGA)
Crime Rate (per 100k)5,528
Total Incidents234
TRANSPORT
Bus Stops28
SCHOOLS (2)
Avg ICSEA1042
Total Students713
Government2
Ardtornish Primary SchoolPrimary · Government · ICSEA 1044
St Agnes School P - 6Primary · Government · ICSEA 1039
Data: 2025-Q4