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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.
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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
Seaford Heights lies within the top 10% of areas nationally in terms of population growth performance according to AreaSearch analysis of short and medium-term trends
The population of Seaford Heights is estimated at around 2,438 as of May 2026. This reflects an increase of 1,359 people since the 2021 Census, which reported a population of 1,079 people. The change is inferred from the resident population of 2,403 estimated by AreaSearch following examination of the latest ERP data release by the ABS in June 2025 and an additional 393 validated new addresses since the Census date. This level of population equates to a density ratio of 1,409 persons per square kilometer, which is above the average seen across national locations assessed by AreaSearch. Seaford Heights's growth of 125.9% since the 2021 census exceeded the SA3 area (5.8%) and the SA4 region, marking it as a growth leader in the region. Population growth for the suburb was primarily driven by interstate migration that contributed approximately 81.0% of overall population gains during recent periods.
AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, released in 2024 with 2022 as the base year. For areas not covered by this data and years post-2032, the SA State Government's Regional/LGA projections are adopted with adjustments made employing a method of weighted aggregation of population growth from LGA to SA2 levels. Anticipating future population dynamics, an above median population growth is projected for the suburb, with an expected increase of 620 persons to 2041 based on aggregated SA2-level projections, reflecting an increase of 24.0% in total over the 16 years.
Frequently Asked Questions - Population
Development
The level of residential development activity in Seaford Heights was found to be higher than 90% of real estate markets across the country
Based on AreaSearch analysis of ABS building approval numbers allocated from statistical area data, Seaford Heights has experienced around 79 dwellings receiving development approval each year. Approximately 399 homes were approved over the past five financial years, from FY-21 to FY-25, with an additional 34 approved so far in FY-26. On average, about 2.3 people have moved to the area per new home constructed during these years, reflecting robust demand that supports property values.
New homes are being built at an average expected construction cost value of $302,000. This year, $2.7 million in commercial approvals have been registered, indicating the area's predominantly residential character. Compared to Greater Adelaide, Seaford Heights shows 1337.0% higher new home approvals per person, offering greater choice for buyers despite a recent slowdown in building activity. This high level suggests strong developer confidence in the location. Recent construction comprises 92.0% detached houses and 8.0% medium to high-density housing, maintaining the area's traditional suburban character focused on family homes.
The location has approximately 27 people per dwelling approval, indicating an expanding market. Future projections show Seaford Heights adding 585 residents by 2041, based on the latest AreaSearch quarterly estimate. At current development rates, new housing supply should comfortably meet demand, providing good conditions for buyers and potentially supporting growth beyond current population projections.
Frequently Asked Questions - Development
Development applications around Seaford Heights
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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
Seaford Heights has emerging levels of nearby infrastructure activity, ranking in the 20thth percentile nationally
No factors influence a region's performance more than changes to local infrastructure, major projects, and planning initiatives. AreaSearch has identified zero projects that may impact this area. Notable projects include Main South Road Duplication Stage 1 - Aldinga Project, Victor Harbor Road Duplication, Sunset Residential Development, Majors Road Interchange. The following list details those most relevant.
Professional plan users can use the search below to filter and access additional projects.
INFRASTRUCTURE SEARCH
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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.
Fleurieu Connections - Main South Road Duplication
Duplication of Main South Road between Sellicks Beach and Victor Harbor, improving safety and reducing travel times to the Fleurieu Peninsula. The project includes new overtaking lanes, intersection upgrades and safety improvements.
Majors Road Interchange
$120 million jointly funded project by Australian and South Australian governments creating new grade-separated interchange providing access to Southern Expressway from Majors Road. Features new on/off ramps, widening of Majors Road bridge from two lanes to six lanes with dedicated right turn lanes, signalised intersection improvements, new bike lanes and shared user paths, new underpasses for Patrick Jonker Veloway, upgraded traffic signals, widening of Majors Road from Southern Expressway to Lonsdale Highway/Ocean Boulevard to provide two through lanes in both directions, underground power lines, tree planting for 50% shade coverage, and realignment of the Patrick Jonker Veloway. Expected to support 245 full-time jobs during construction and provide improved access to Glenthorne National Park, Sam Willoughby International BMX Facility and Southern Soccer Facility. Construction by Acciona Construction Australia, completion expected end of 2025.
Noarlunga Master Planning Housing Project
A 22-hectare master-planned residential development delivering 626 new homes with a diverse mix of dwelling types including detached homes, townhouses and apartments. The project features a minimum of 28% affordable and social housing (including 80 social housing dwellings), and 12.5% new public open space. Designed by Holmes Dyer, the development targets a 5-Star Green Star Communities rating and emphasizes sustainability, extensive tree canopy coverage, and enhanced connectivity to nearby amenities including Colonnades Shopping Centre, Noarlunga TAFE, Noarlunga Hospital and Noarlunga Railway Station. Civil works by Winslow Constructors are underway with the first sales releases now on market. The community will become home to approximately 1,200 residents over a 7-10 year delivery period.
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.
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.
Bulk Water Supply Security
Nationwide program led by the National Water Grid Authority to improve bulk water security and reliability for non-potable and productive uses. Activities include strategic planning, science and business cases, and funding of state and territory projects such as storages, pipelines, dam upgrades, recycled water and efficiency upgrades to build drought resilience and support regional communities, industry and the environment.
Main South Road Duplication Stage 1 - Aldinga Project
Part of Fleurieu Connections providing safer, faster journeys from Seaford to Aldinga. Supporting local tourism and communities. Aldinga Interchange construction underway with piling works, 12 x 40-tonne girders supporting bridge deck 26m long x 27m wide. 62 architectural panels and 86m anti-throw screens.
Employment
AreaSearch analysis of employment trends sees Seaford Heights performing better than 90% of local markets assessed across Australia
Seaford Heights has a skilled workforce with essential services sectors well represented. The unemployment rate is 0.5% and there was an estimated 17.1% employment growth in the past year based on AreaSearch data aggregation. As of December 2025, 1,553 residents are employed while the unemployment rate is 3.3% lower than Greater Adelaide's rate of 3.8%.
Workforce participation is high at 83.6%, compared to Greater Adelaide's 66.0%. According to Census responses, only 9.4% of residents work from home, though Covid-19 lockdown impacts should be considered. Dominant employment sectors include health care & social assistance, retail trade, and construction. Retail trade has a strong presence with an employment share 1.4 times the regional level.
Professional & technical services have limited presence at 3.8%, compared to the regional average of 7.3%. Employment opportunities locally may be limited as indicated by the count of Census working population vs resident population. Between December 2024 and December 2025, employment levels increased by 17.1% and labour force grew by 16.9%, reducing the unemployment rate by 0.2 percentage points. In comparison, Greater Adelaide recorded employment growth of 4.2%, labour force growth of 3.9%, with a decrease in unemployment of 0.3 percentage points. National employment forecasts from Jobs and Skills Australia for May-25 suggest that national employment will expand by 6.6% over five years and 13.7% over ten years. Applying these projections to Seaford Heights' employment mix, local employment is estimated to increase by 6.5% over five years and 13.5% over ten years, assuming constant population projections for illustrative purposes.
Frequently Asked Questions - Employment
Income
Income metrics indicate excellent economic conditions, with the area achieving higher performance than 75% of national locations assessed by AreaSearch
The suburb of Seaford Heights has an extremely high national income level according to latest ATO data aggregated by AreaSearch for financial year 2023. The median income among taxpayers in Seaford Heights is $68,945 and the average income stands at $85,216. For Greater Adelaide, these figures are $54,808 and $66,852 respectively. Based on Wage Price Index growth of 10.17% since financial year 2023, current estimates for Seaford Heights would be approximately $75,957 (median) and $93,882 (average) as of March 2026. Census data shows household, family and personal incomes in Seaford Heights rank highly nationally, between the 76th and 85th percentiles. Income brackets indicate that 51.7% of individuals earn between $1,500 and $2,999 annually. This is consistent with broader metropolitan trends showing 31.8% in the same category. High housing costs consume 16.3% of income. Despite this, disposable income ranks at the 75th percentile nationally. The area's SEIFA income ranking places it in the 6th decile.
Frequently Asked Questions - Income
Housing
Seaford Heights is characterized by a predominantly suburban housing profile, with ownership patterns similar to the broader region
Seaford Heights' dwelling structure, as per the latest Census, consisted of 94.9% houses and 5.1% other dwellings (semi-detached, apartments, 'other' dwellings), contrasting with Adelaide metro's 75.2% houses and 24.9% other dwellings. Home ownership in Seaford Heights stood at 10.2%, with mortgaged dwellings at 67.0% and rented ones at 22.8%. The median monthly mortgage repayment was $1,733, above Adelaide metro's average of $1,562. Median weekly rent in Seaford Heights was $380, higher than Adelaide metro's $320. Nationally, Seaford Heights' mortgage repayments were lower than the Australian average of $1,863, while rents exceeded the national figure of $375.
Frequently Asked Questions - Housing
Household Composition
Seaford Heights features high concentrations of family households, with a higher-than-average median household size
Family households account for 81.4% of all households, including 37.2% couples with children, 33.6% couples without children, and 9.2% single parent families. Non-family households constitute the remaining 18.6%, with lone person households at 16.8% and group households comprising 1.7%. The median household size is 2.6 people, larger than the Greater Adelaide average of 2.5.
Frequently Asked Questions - Households
Local Schools & Education
Educational achievement in Seaford Heights places it within the top 10% nationally, reflecting strong academic performance and high qualification levels across the community
The area's university qualification rate is 25.0%, higher than the SA3 average of 18.9%. Bachelor degrees are most common at 17.5%, followed by postgraduate qualifications (4.7%) and graduate diplomas (2.8%). Vocational credentials are held by 41.8% of residents aged 15+, with advanced diplomas at 9.2% and certificates at 32.6%.
Educational participation is high, with 26.7% currently enrolled in formal education. This includes 10.4% in primary, 5.1% in tertiary, and 4.8% in secondary education.
Frequently Asked Questions - Education
Schools Detail
Nearby Services & Amenities
Transport
Transport servicing is low compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility
Public transport analysis indicates two active transport stops operating within Seaford Heights. These stops serve a mix of bus routes, with four individual routes providing 145 weekly passenger trips in total. Transport accessibility is rated good, with residents typically located 395 meters from the nearest stop. As a primarily residential area, most residents commute outward using their cars as the dominant mode at 91%, while 7% use trains for their commutes. Vehicle ownership averages 1.6 per dwelling, which is higher than the regional average. According to the 2021 Census, a relatively low 9.4% of residents work from home, which may reflect COVID-19 conditions.
Service frequency across all routes averages 20 trips per day, equating to approximately 72 weekly trips per individual stop.
Frequently Asked Questions - Transport
Transport Stops Detail
Health
Seaford Heights's residents are healthier than average in comparison to broader Australia with a fairly standard level of common health conditions seen across both young and old age cohorts
Health data for Seaford Heights indicates positive outcomes, with mortality rates and health conditions largely matching national benchmarks. Both younger and older residents experience common health issues at standard levels.
Private health cover is exceptionally high, with 61% of the total population (1,477 people) having it, compared to 52.7% in Greater Adelaide. The most prevalent medical conditions are asthma and mental health issues, affecting 7.8 and 7.5% of residents respectively. Notably, 79.0% of residents report no medical ailments, higher than the 67.9% across Greater Adelaide. Working-age residents show low chronic condition prevalence. The area has 9.8% of residents aged 65 and over (238 people), lower than Greater Adelaide's 19.2%. Overall health rankings align with national standards for the general population.
Frequently Asked Questions - Health
Cultural Diversity
The level of cultural diversity witnessed in Seaford Heights was found to be slightly above average when compared nationally for a number of language and cultural background related metrics
Seaford Heights had a cultural diversity level above average, with 12.3% of its population speaking a language other than English at home and 26.6% born overseas. Christianity was the predominant religion in Seaford Heights, comprising 31.4% of people. Notably, the category 'Other' comprised 1.9%, slightly higher than Greater Adelaide's 1.8%.
In terms of ancestry, English was the largest group at 36.7%, substantially higher than Greater Adelaide's average of 27.8%. Australian ancestry made up 25.6% and Other accounted for 6.5%. Some ethnic groups showed notable differences: Croatian was overrepresented at 1.0%, Sri Lankan at 0.5%, and Dutch at 1.6%.
Frequently Asked Questions - Diversity
Age
Seaford Heights hosts a very young demographic, ranking in the bottom 10% of areas nationwide
Seaford Heights has a median age of 31, which is lower than the Greater Adelaide figure of 39 and Australia's national average of 38 years. Compared to Greater Adelaide, Seaford Heights has a higher percentage of residents aged 25-34 (24.1%) but fewer residents aged 65-74 (5.0%). This concentration of 25-34 year-olds is significantly higher than the national average of 14.6%. Between the 2021 Census and now, residents have aged on average by 2 years, with the median age rising from 29 to 31. Specifically, the percentage of residents aged 55-64 has increased from 5.2% to 8.0%, while those aged 75-84 have risen from 1.1% to 3.0%. Conversely, the percentage of residents aged 25-34 has decreased from 31.2% to 24.1%, and those aged 45-54 have dropped from 10.5% to 9.0%. By 2041, demographic modeling suggests that Seaford Heights' age profile will change significantly. The number of residents aged 25-34 is projected to increase by 141 people (24%), rising from 587 to 729.