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This analysis uses Suburbs and Localities (SAL) boundaries, which can materially differ from Statistical Areas (SA2) even when sharing the same name.
SAL boundaries are defined by Australia Post and the Australian Bureau of Statistics to represent commonly-known suburb names used in postal addresses.
Statistical Areas (SA2) are designed for census data collection and may combine multiple suburbs or use different geographic boundaries. For comprehensive analysis, consider reviewing both boundary types if available.
est. as @ -- *
2021 Census | -- people
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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Population
An assessment of population growth drivers in St Agnes reveals an overall ranking slightly below national averages considering recent, and medium term trends
Based on ABS population updates and AreaSearch validation, the estimated population for the suburb of St Agnes (SA) is around 4,189 as of May 2026. This reflects a decrease from the 2021 Census figure of 4,233 people, a change inferred from the resident population estimate of 4,169 by AreaSearch following examination of ABS's ERP data release in June 2025 and validation of 13 new addresses since the Census date. This results in a density ratio of 1,611 persons per square kilometer, higher than the average across national locations assessed by AreaSearch. Overseas migration contributed approximately 86.0% of overall population gains during recent periods. AreaSearch employs ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022.
For areas not covered and years post-2032, the SA State Government's Regional/LGA projections by age category are adopted, released in 2023 based on 2021 data with adjustments made using weighted aggregation methods from LGA to SA2 levels. Future population dynamics anticipate a growth of 446 persons to 2041, reflecting an increase of 10.2% over the 16-year period, based on aggregated SA2-level projections.
Frequently Asked Questions - Population
Development
Residential development activity is lower than average in St Agnes according to AreaSearch's national comparison of local real estate markets
Based on AreaSearch analysis of ABS building approval numbers, St Agnes has averaged approximately 22 new dwelling approvals each year. Between FY-21 and FY-25, an estimated 114 homes were approved, with a further 20 approved in FY-26 to date. Over the past five financial years, on average, only 0.6 people have moved to the area for each dwelling built.
This indicates that new construction is matching or outpacing demand, providing more options for buyers and potentially facilitating population growth beyond current expectations. The average expected construction cost value of new dwellings in St Agnes is $320,000. In FY-26, $675,000 worth of commercial approvals have been registered, suggesting a predominantly residential focus.
Compared to Greater Adelaide, St Agnes records elevated construction activity, with 14.0% more dwelling approvals per person over the past five years. This maintains good buyer choice while supporting existing property values. New development in St Agnes consists of 87.0% detached houses and 13.0% townhouses or apartments, preserving the area's suburban nature and attracting space-seeking buyers. The location has approximately 168 people per dwelling approval, indicating a low density market. According to AreaSearch's latest quarterly estimate, St Agnes is projected to gain 426 residents by 2041. Given current development patterns, new housing supply should readily meet demand, offering good conditions for buyers and potentially facilitating population growth beyond current projections.
Frequently Asked Questions - Development
Development applications around St Agnes (SA)
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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
St Agnes has emerging levels of nearby infrastructure activity, ranking in the 32ndth percentile nationally
Three projects identified by AreaSearch are expected to impact the area: Grove Way and Golden Way Intersection Upgrade, Luminaire Estate - Residential Development, Tea Tree Gully Sustainable Sewers Program, and Golden Grove Neighbourhood Code Amendment.
Professional plan users can use the search below to filter and access additional projects.
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Frequently Asked Questions - Infrastructure
SA Water Capital Work Delivery Contracts 2024-28
SA Water's record $3.3 billion capital delivery program for the 2024-28 regulatory period, covering water and wastewater infrastructure across South Australia. The program targets water main replacements, sewerage network upgrades, dam upgrades, water tank refurbishments, and treatment process upgrades across metropolitan and regional areas. A central $1.5 billion component supports the South Australian Premier's Housing Roadmap, expanding network capacity to unlock up to 40,000 new allotments, with major focus on Adelaide's northern growth corridors including Angle Vale, Riverlea, and Roseworthy. Six major framework partners (Fulton Hogan Utilities, John Holland and Guidera O'Connor JV, McConnell Dowell and Diona JV, BMD, Diona, and Leed Engineering and Construction) are delivering works across approximately 120 projects. In Year 1 (to June 2025), $681.6 million in capital was invested. The program runs to June 2028.
Northern Adelaide Irrigation Scheme
The Northern Adelaide Irrigation Scheme (NAIS) is a recycled water scheme delivering high-quality treated water from the Bolivar Wastewater Treatment Plant to agribusinesses across the Northern Adelaide Plains. Stage 1 infrastructure was built to provide up to 12 gigalitres per year of climate-independent recycled water for horticulture, floriculture, fruit and nut orchards, table and wine grapes, and high-value broad-acre crops, with the network designed to enable future expansion to 20 gigalitres. Key infrastructure includes an advanced water recycling plant at Bolivar, a transfer pipeline, pump stations, an above-ground earth-banked storage at Korunye, managed aquifer recharge, and a distribution network with farm-gate connection points. Construction began in 2018 and the scheme is operational. As of 2025 around 35 per cent of the contracted volume has been sold, and SA Water has been undertaking a review to assess current and forecast demand and identify potential opportunities for the scheme.
Tea Tree Gully Sustainable Sewers Program
SA Water program to transfer about 4,700 properties in the City of Tea Tree Gully from a council run Community Wastewater Management System with on site septic tanks to a modern sewer network. The project includes staged construction of new wastewater mains, gravity and low pressure sewer connections, new pump stations and on property works, followed by decommissioning and backfilling of septic tanks. Delivery is being rolled out in zones between 2022 and 2028, improving service reliability, reducing overflows and supporting long term water and public health outcomes for the north eastern suburbs of Adelaide.
Gawler Line Electrification & Level Crossing Removals
State and federal government project to electrify the 42km Gawler rail line from Adelaide CBD to Gawler, with 25kV AC overhead wiring, new signalling systems, upgrade of 14 stations, and activation of 13 pedestrian crossings. Electrified passenger services commenced June 2022. The complementary Ovingham Level Crossing Removal ($231M) replaced the high-risk Torrens Road crossing with a new overpass, public plaza and upgraded Ovingham Railway Station, completing in late 2023.
O-Bahn City Access Project
Completed SA Government public transport project extending the O-Bahn from Gilberton into Adelaide city via centrally aligned priority bus lanes on Hackney Road and a dedicated 670 m bus-only tunnel to Grenfell Street. The works improved bus travel time reliability, reduced Inner Ring Route congestion, reconfigured Rundle Road and East Terrace, and added pedestrian and cycling improvements including a shared path and bridge over the River Torrens.
SA Housing Trust Maintenance Contracts Review and Service Program
Statewide maintenance and service contracts for SA Housing Trust public housing properties, covering reactive maintenance, vacancy restoration and minor works across metropolitan and regional South Australia. The program is delivered by Spotless Facility Services, RTC Facilities Maintenance and Torrens Facility Management. A 2024 SA Government review examined payment, timeliness, dispute resolution and contract performance issues, and the government provided additional funding to accelerate maintenance and upgrades on vacant public housing homes.
Adelaide Public Transport Capacity and Access
State-led program work to increase public transport capacity and access to, through and within central Adelaide. Current work is focused on the City Access Strategy (20-year movement plan for the CBD and North Adelaide) and the State Transport Strategy program, which together will shape options such as bus priority, interchange upgrades, tram and rail enhancements, and better first/last mile access.
Adelaide Level Crossing Removal Planning Program
A joint Australian and South Australian Government program to conduct planning studies at priority at-grade level crossing locations across metropolitan Adelaide, and establish a ten-year Level Crossing Removal Program. Adelaide has 126 at-grade level crossings where boom gates can be closed for up to 25% of peak traffic periods. Priority sites under active planning include Cormack Road (Wingfield), Kings Road (Parafield), and Park Terrace (Salisbury). The program commenced in early 2022 and is expected to be completed by late 2026, with the first major removal project - Curtis Road, Munno Para - announced in May 2025 with a $250 million joint funding commitment and construction starting by 2027.
Employment
The labour market strength in St Agnes positions it well ahead of most Australian regions
St Agnes has a skilled workforce with significant representation in essential services sectors. Its unemployment rate was 1.7% as of December 2025, lower than Greater Adelaide's rate of 3.8%. Workforce participation was somewhat below the regional average at 62.3%.
According to Census responses, 11.2% of residents worked from home in 2025. Key industries of employment among residents were health care & social assistance, retail trade, and education & training, while accommodation & food services had limited presence with 4.9% employment compared to the regional average of 6.8%. Employment opportunities within St Agnes appear limited locally based on Census data comparing working population to resident population.
Between December 2024 and December 2025, employment levels increased by 0.1%, labour force increased by 0.0%, with unemployment remaining essentially unchanged. In contrast, Greater Adelaide experienced employment growth of 4.2% and labour force growth of 3.9%. Jobs and Skills Australia's national employment forecasts from May-25 suggest that national employment is projected to expand by 6.6% over five years and 13.7% over ten years. Applying these projections to St Agnes' employment mix suggests local employment should increase by 6.4% over five years and 13.4% over ten years, though this extrapolation does not account for localized population projections.
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 30, 2023 indicates that income in St Agnes is below the national average. The median income was $52,742 while the average income stood at $59,222. In comparison, Greater Adelaide had a median income of $54,808 and an average income of $66,852 during the same period. Based on Wage Price Index growth of 10.17% since June 30, 2023, current estimates suggest approximately $58,106 for median income and $65,245 for average income as of March 2026. Census data shows household, family, and personal incomes in St Agnes rank modestly, between the 38th and 38th percentiles. Income analysis reveals that the largest segment comprises 35.6% earning $1,500 - $2,999 weekly (1,491 residents), which is similar to regional levels where 31.8% fall within this range. Housing costs are manageable with 86.7% retained, but disposable income sits below average at the 42nd percentile. The area's SEIFA income ranking places it in the 5th decile.
Frequently Asked Questions - Income
Housing
St Agnes is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership
St Agnes' dwelling structure, as per the latest Census, comprised 85.8% houses and 14.3% other dwellings. In contrast, Adelaide metro had 75.2% houses and 24.9% other dwellings. Home ownership in St Agnes was 39.9%, with mortgaged dwellings at 43.1% and rented ones at 17.0%. The median monthly mortgage repayment was $1,500, lower than Adelaide metro's average of $1,562. Median weekly rent in St Agnes was $340, compared to Adelaide metro's $320. Nationally, St Agnes' mortgage repayments were significantly lower than the Australian average of $1,863, and rents were less than the national figure of $375.
Frequently Asked Questions - Housing
Household Composition
St Agnes has a typical household mix, with a lower-than-average median household size
Family households constitute 71.8% of all households, including 29.1% couples with children, 29.9% couples without children, and 11.8% single parent families. Non-family households comprise the remaining 28.2%, with lone person households at 26.6% and group households making up 2.1% of the total. The median household size is 2.4 people, which is smaller than the Greater Adelaide average of 2.5.
Frequently Asked Questions - Households
Local Schools & Education
Educational attainment in St Agnes aligns closely with national averages, showing typical qualification patterns and performance metrics
St Agnes has a lower proportion of residents aged 15 and above with university degrees compared to Australia, with 22.2% versus 30.4%. The most common qualification is the bachelor degree at 15.7%, followed by postgraduate qualifications (4.0%) and graduate diplomas (2.5%). Vocational credentials are also prevalent, with 37.0% of residents holding such qualifications, including advanced diplomas (11.4%) and certificates (25.6%). A significant portion of the population is actively engaged in education, with 24.3% pursuing formal learning.
This includes 9.8% in primary education, 5.8% in secondary education, and 4.0% studying at the tertiary level.
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
Public transport analysis indicates 28 active transport stops operating within St Agnes, consisting of a mix of bus services. These stops are served by 14 individual routes, collectively facilitating 1,143 weekly passenger trips. Transport accessibility is rated as good, with residents typically residing 223 meters from the nearest transport stop. As a predominantly residential area, most residents commute outward. The car remains the dominant mode of transportation at 86%, while 10% use public buses for their journeys. On average, there are 1.4 vehicles per dwelling in St Agnes.
According to the 2021 Census, a relatively low 11.2% of residents work from home, which may reflect COVID-19 conditions. Service frequency averages 163 trips per day across all routes, equating to approximately 40 weekly trips per individual stop.
Frequently Asked Questions - Transport
Transport Stops Detail
Health
Health performance in St Agnes is well below average with considerably higher than average prevalence of common health conditions and to an even higher degree among older age cohorts
St Agnes faces significant health challenges based on AreaSearch's assessment. Mortality rates and chronic condition prevalence are substantially higher than average, with older age cohorts experiencing an even greater degree of these issues. Private health cover is relatively low at approximately 50% of the total population (~2,112 people), compared to Greater Adelaide's 52.7% and the national average of 55.7%.
The most common medical conditions are mental health issues (10.0%) and arthritis (9.9%), while 61.3% of residents report being completely clear of medical ailments, compared to 67.9% across Greater Adelaide. Working-age residents show an above-average prevalence of chronic health conditions. The area has 22.9% of residents aged 65 and over (959 people), higher than Greater Adelaide's 19.2%. Health outcomes among seniors present some challenges, ranking lower nationally than the broader population.
Frequently Asked Questions - Health
Cultural Diversity
The level of cultural diversity witnessed in St Agnes was found to be slightly above average when compared nationally for a number of language and cultural background related metrics
St Agnes has a higher than average cultural diversity, with 24.7% of its population born overseas and 16.5% speaking a language other than English at home. Christianity is the predominant religion in St Agnes, accounting for 45.1% of its population. Notably, the 'Other' religious category comprises 1.9% of St Agnes's population, slightly higher than the 1.8% regional average.
In terms of ancestry, the top three groups are English (30.4%), Australian (24.6%), and Other (7.2%). Some ethnic groups show significant differences: German is overrepresented at 7.0%, compared to 5.1% regionally; Polish at 1.1%, versus 1.0%; and Welsh at 0.8%, compared to 0.6%.
Frequently Asked Questions - Diversity
Age
St Agnes hosts a notably older demographic compared to the national average
The median age in St Agnes is 44 years, which is notably higher than Greater Adelaide's average of 39 years and also exceeds the Australian median of 38 years. Compared to the Greater Adelaide average, the 55-64 age cohort is significantly over-represented in St Agnes at 13.6%, while the 25-34 age group is under-represented at 11.6%. Between the 2021 Census and the present day, the population of the 35 to 44 age group has grown from 12.4% to 13.7%. Conversely, the 45 to 54 age cohort has declined from 13.0% to 11.6%, and the 65 to 74 age group has dropped from 11.9% to 10.6%. By 2041, population forecasts indicate substantial demographic changes for St Agnes. The 85+ age cohort is projected to grow significantly, increasing by 145 people (an 85% rise) from 171 to 317. This aging population trend is evident, with those aged 65 and above comprising 53% of the projected growth. In contrast, the 55-64 age cohort shows minimal growth of just 1%, an increase of only 3 people.