Seaford Heights

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

As of November 2025, the estimated population of Seaford Heights is around 1,715. This figure reflects a significant increase from the 2021 Census, which reported a population of 1,079 people. The growth of 636 people (58.9%) since the census is inferred from AreaSearch's estimation of the resident population at 1,652 following examination of the latest ERP data release by the ABS in June 2024, along with an additional 336 validated new addresses since the Census date. This results in a population density ratio of 991 persons per square kilometer, which is relatively in line with averages seen across other locations assessed by AreaSearch. The suburb's growth since the 2021 census exceeded that of both its SA3 area (4.9%) and SA4 region, marking it as a significant growth leader. This population growth was primarily driven by interstate migration contributing approximately 81.0% of overall population gains during recent periods, although all drivers including overseas migration and natural growth were positive factors.

AreaSearch adopts ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered by this data and years post-2032, the SA State Government's Regional/LGA projections by age category are adopted, based on 2021 data and released in 2023, with adjustments made employing a method of weighted aggregation of population growth from LGA to SA2 levels. Moving forward with demographic trends, an above median population growth is projected for the suburb, with an expected expansion of 276 persons by 2041 based on aggregated SA2-level projections, reflecting a reduction of 9.4% in total over the 17-year period.

AreaSearch assessment of residential development activity positions Seaford Heights among the top 25% of areas assessed nationwide

AreaSearch analysis of ABS building approval numbers allocated from statistical area data shows Seaford Heights averaged around 80 new dwelling approvals each year over the past five financial years, totalling an estimated 404 homes. As of FY-26 so far, 18 approvals have been recorded. The average number of people moving to the area per year for each dwelling built over these five years is 0.8. New supply has kept pace with or exceeded demand, offering ample buyer choice and creating capacity for population growth beyond current forecasts.

Average construction cost value of new homes is $302,000, under regional levels, indicating more accessible housing choices for buyers. This financial year has seen $10.5 million in commercial approvals, indicating steady commercial investment activity. Compared to Greater Adelaide, Seaford Heights records 1469.0% more building activity per person, creating greater choice for buyers though construction activity has eased recently. This level is significantly above the national average, indicating robust developer interest in the area. New building activity shows 91.0% standalone homes and 9.0% townhouses or apartments, preserving the area's suburban nature with an emphasis on detached housing attracting space-seeking buyers.

The location has approximately 21 people per dwelling approval, indicating an expanding market. With population projections showing stability or decline, Seaford Heights should see reduced housing demand pressures, benefiting potential buyers.

Seaford Heights has emerging levels of nearby infrastructure activity, ranking in the 38thth percentile nationally

Changes to local infrastructure significantly influence an area's performance. AreaSearch has identified a total of 0 projects that may impact this area. Notable projects include Main South Road Duplication Stage 1 - Aldinga Project, Victor Harbor Road Duplication, Sunset Residential Development, and Majors Road Interchange. The following list details those most relevant.

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The exceptional employment performance in Seaford Heights places it among Australia's strongest labour markets

Seaford Heights has a skilled workforce with prominent representation in essential services sectors. Its unemployment rate was 0.6% as of June 2025.

Over the past year, there was an estimated employment growth of 2.9%. In Seaford Heights, 786 residents were employed while the unemployment rate was 3.4%, lower than Greater Adelaide's rate of 4.0%. Workforce participation in Seaford Heights was 83.3%, higher than Greater Adelaide's 61.7%. Dominant employment sectors include health care & social assistance, retail trade, and construction.

Retail trade is particularly strong with an employment share of 1.4 times the regional level. However, professional & technical services are under-represented at 3.8% compared to 7.3% in Greater Adelaide. The area offers limited local employment opportunities as indicated by Census data on working population vs resident population. Between June 2024 and June 2025, employment levels increased by 2.9%, labour force grew by 3.0%, and unemployment rose by 0.1 percentage points. In contrast, Greater Adelaide saw employment rise by 2.1% with a marginal increase in unemployment. Jobs and Skills Australia's national employment forecasts from Sep-22 project national employment growth of 6.6% over five years and 13.7% over ten years. Applying these projections to Seaford Heights' employment mix suggests local employment should increase by 6.5% over five years and 13.5% over ten years, though this is a simple extrapolation for illustrative purposes only.

Income metrics indicate excellent economic conditions, with the area achieving higher performance than 75% of national locations assessed by AreaSearch

Seaford Heights' median taxpayer income was $68,945 with an average of $85,216 based on latest postcode level ATO data aggregated by AreaSearch for financial year 2022. This is significantly higher than Greater Adelaide's median income of $52,592 and average income of $64,886. Using a Wage Price Index growth rate of 12.83% from financial year 2022 to September 2025, estimated incomes would be approximately $77,791 (median) and $96,149 (average). According to the 2021 Census, incomes in Seaford Heights rank highly nationally, between the 76th and 85th percentiles for households, families, and individuals. The income band of $1,500 - 2,999 captures 51.7% of residents (886 individuals), similar to regional patterns where 31.8% fall within this range. Housing costs consume 16.3% of income in Seaford Heights, but strong earnings place disposable income at the 75th percentile nationally. The area's SEIFA income ranking places it in the 6th decile.

Seaford Heights is characterized by a predominantly suburban housing profile, with ownership patterns similar to the broader region

Seaford Heights' dwellings, as per the latest Census, consisted of 94.9% houses and 5.1% other dwellings (semi-detached, apartments, 'other' dwellings). This compares to Adelaide metro's 89.2% houses and 10.7% other dwellings. Home ownership in Seaford Heights was at 10.2%, with the rest being mortgaged (67.0%) or rented (22.8%). The median monthly mortgage repayment in the area was $1,733, higher than Adelaide metro's average of $1,452. The median weekly rent figure was recorded at $380, compared to Adelaide metro's $314. Nationally, Seaford Heights' mortgage repayments were lower than the Australian average of $1,863, while rents exceeded the national figure of $375.

Seaford Heights features high concentrations of family households, with a higher-than-average median household size

Family households constitute 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 account for the remaining 18.6%, with lone person households at 16.8% and group households comprising 1.7% of the total. The median household size is 2.6 people, larger than the Greater Adelaide average of 2.5.

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 educational profile is notable regionally with university qualification rates at 25.0% among residents aged 15+, surpassing the SA3 area average of 18.9%. Bachelor degrees are most prevalent at 17.5%, followed by postgraduate qualifications (4.7%) and graduate diplomas (2.8%). Vocational credentials are prominent, with 41.8% of residents aged 15+ holding such qualifications – advanced diplomas account for 9.2% while certificates make up 32.6%.

Educational participation is high at 26.7%, including 10.4% in primary education, 5.1% in tertiary education, and 4.8% pursuing secondary education. Educational facilities appear to be located outside the immediate catchment boundaries, necessitating families to access schools in neighboring areas.

Transport servicing is low compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility

Transport analysis indicates two operational public transport stops within Seaford Heights. These stops offer a mix of bus services, with four distinct routes providing 145 weekly passenger trips in total. The accessibility of these transport services is rated as good, with residents typically situated 395 meters from the nearest stop.

Across all routes, service frequency averages 20 trips per day, resulting in approximately 72 weekly trips per individual stop.

Seaford Heights's residents boast exceedingly positive health performance metrics with a fairly standard level of common health conditions seen across both young and old age cohorts

Health outcomes data shows excellent results at Seaford Heights, with typical health conditions seen across both young and elderly populations. Approximately 61% of residents have private health cover, compared to 48.6% in Greater Adelaide and a national average of 55.3%. The most prevalent medical conditions are asthma (7.8%) and mental health issues (7.5%).

Around 79.0% of residents report no medical ailments, higher than the 62.9% in Greater Adelaide. Only 4.0% of residents are aged 65 or over (68 people), lower than the 21.0% in Greater Adelaide.

The level of cultural diversity witnessed in Seaford Heights was found to be above average when compared nationally for a number of language and cultural background related metrics

Seaford Heights' population, as per a study, showed cultural diversity with 12.3% speaking languages other than English at home and 26.6% born overseas. Christianity was the predominant religion, accounting for 31.4%. The 'Other' religion category was overrepresented in Seaford Heights at 1.9%, compared to Greater Adelaide's 0.7%.

In terms of ancestry, the top groups were English (36.7%), Australian (25.6%), and Other (6.5%). Notably, Croatian (1.0% vs regional 0.3%), Sri Lankan (0.5% vs 0.1%), and Dutch (1.6% vs 1.7%) groups showed significant divergences in representation.

Seaford Heights hosts a very young demographic, ranking in the bottom 10% of areas nationwide

Seaford Heights has a median age of 29 years, which is lower than the Greater Adelaide average of 39 years and the Australian median of 38 years. Compared to Greater Adelaide, Seaford Heights has a higher percentage of residents aged 25-34 (31.6%) but fewer residents aged 65-74 (2.4%). This concentration of 25-34 year-olds is higher than the national average of 14.5%. Between 2021 and present, the percentage of residents aged 45 to 54 has decreased from 10.5% to 8.1%. By 2041, demographic modeling suggests Seaford Heights' age profile will change significantly. The number of residents aged 85 and above is projected to increase by 9 people (68%), from 13 to 23. Notably, all population growth in the area will come from the combined 65+ age groups, reflecting its aging demographic trend. Conversely, population declines are projected for the 65-74 and 45-54 age cohorts.