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

Based on analysis of ABS population updates for the broader area, the estimated population of Seaford Heights is around 1,715 as of Feb 2026. This reflects an increase of 636 people since the 2021 Census, which reported a population of 1,079 people. The change is inferred from the resident population of 1,591 estimated by AreaSearch following examination of the latest ERP data release by the ABS in June 2024 and an additional 360 validated new addresses since the Census date. This level of population equates to a density ratio of 991 persons per square kilometer, which is relatively in line with averages seen across locations assessed by AreaSearch. The suburb's 58.9% growth since the 2021 census exceeded the SA3 area (6.4%), along with the SA4 region, marking it as a growth leader in the region. Population growth for the area was primarily driven by interstate migration that contributed approximately 81.0% of overall population gains during recent periods, although all drivers including overseas migration and natural growth were positive factors.

AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, as released in 2024 with 2022 as the base year. For any SA2 areas not covered by this data, and for years post-2032, the SA State Government's Regional/LGA projections by age category, released in 2023 and based on 2021 data, are adopted 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 of national statistical areas is projected, with the suburb expected to expand by 288 persons to 2041 based on aggregated SA2-level projections, reflecting a reduction of 9.1% in total over the 17 years.

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

AreaSearch analysis of ABS building approval numbers for Seaford Heights shows an average of 79 new dwelling approvals per year over the past five financial years, totalling approximately 399 homes. As of FY26, 25 approvals have been recorded. Between FY21 and FY25, there was an average of 0.8 people moving to the area for each dwelling built. This suggests that new supply is keeping pace with or exceeding demand, providing ample buyer choice and creating capacity for population growth beyond current forecasts.

The average construction cost value of new homes is $302,000. Additionally, $2.7 million in commercial development approvals have been recorded this financial year, indicating the area's residential character. Relative to Greater Adelaide, Seaford Heights shows 1452.0% higher development activity per person, offering buyers greater choice. However, building activity has slowed in recent years. This level is significantly above the national average, suggesting robust developer interest in the area.

New building activity comprises approximately 92.0% standalone homes and 8.0% medium and high-density housing, preserving the area's suburban nature with an emphasis on detached housing attracting space-seeking buyers. With around 22 people per dwelling approval, Seaford Heights shows characteristics of a growth area. Given stable or declining population forecasts, Seaford Heights may experience less housing pressure in the future, creating favourable conditions for buyers.

Seaford Heights has limited levels of nearby infrastructure activity, ranking in the 16thth percentile nationally

No factors affect a region's performance more than changes in local infrastructure, major projects, and planning initiatives. AreaSearch has identified zero projects that could potentially 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 outlines those most relevant.

Professional plan users can use the search below to filter and access additional projects.

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Employment conditions in Seaford Heights rank among the top 10% of areas assessed nationally

Seaford Heights has a skilled workforce with prominent representation in essential services sectors. The unemployment rate is 0.4% as of September 2025. Employment growth over the past year was estimated at 4.6%.

Residents' unemployment rate is 3.6%, lower than Greater Adelaide's 3.9%. Workforce participation stands at 69.8%, compared to Greater Adelaide's 66.4%. Home-based work accounts for 9.4% of residents, considering Covid-19 lockdown impacts. Healthcare & social assistance, retail trade, and construction are the primary employment sectors.

Retail trade is particularly strong with an employment share of 1.4 times the regional level. Professional & technical services employ just 3.8%, below Greater Adelaide's 7.3%. Limited local employment opportunities are indicated by the resident population outnumbering the working population. Over a 12-month period, employment increased by 4.6% alongside labour force growth of 4.6%, keeping unemployment relatively stable at 0.4%. In contrast, Greater Adelaide saw employment grow by 3.0% and labour force expand by 2.9%, with unemployment falling to 3.8%. National employment forecasts from Jobs and Skills Australia, published in May-25, project a 6.6% increase over five years and 13.7% over ten years. Applying these projections to Seaford Heights' employment mix suggests local employment should grow by 6.5% over five years and 13.5% over ten years.

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

AreaSearch's latest postcode level ATO data for financial year 2023 shows that Seaford Heights has one of the highest incomes in Australia. The median income is $68,945 and the average is $85,216. This contrasts with Greater Adelaide's median income of $54,808 and average income of $66,852. Based on Wage Price Index growth of 8.8% since financial year 2023, current estimates for Seaford Heights are approximately $75,012 (median) and $92,715 (average) as of September 2025. Census 2021 income data shows that incomes in Seaford Heights rank highly nationally, between the 76th and 85th percentiles for household, family, and personal incomes. The largest segment comprises 51.7% earning $1,500 - 2,999 weekly (886 residents), similar to the surrounding region where 31.8% fall into this bracket. High housing costs consume 16.3% of income, 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

The dwelling structure in Seaford Heights, as per the latest Census, was 94.9% houses and 5.1% other dwellings (semi-detached, apartments, 'other' dwellings). In comparison, Adelaide metro had 75.2% houses and 24.9% other dwellings. Home ownership in Seaford Heights stood at 10.2%, with the rest either mortgaged (67.0%) or rented (22.8%). The median monthly mortgage repayment was $1,733, higher than Adelaide metro's average of $1,562. The median weekly rent in Seaford Heights was $380, compared to 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.

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

Family households account for 81.4 percent of all households, including 37.2 percent couples with children, 33.6 percent couples without children, and 9.2 percent single parent families. Non-family households constitute the remaining 18.6 percent, with lone person households at 16.8 percent and group households comprising 1.7 percent 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% of 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 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% of residents currently enrolled in formal education. This includes 10.4% in primary education, 5.1% in tertiary education, and 4.8% pursuing secondary education.

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

Seaford Heights has two operational public transport stops, both offering bus services. These stops are served by four distinct routes, together facilitating 145 weekly passenger trips. Transport access is deemed good, with residents on average situated 395 meters from the nearest stop. Primarily residential, most residents commute outward, predominantly by car (91%), with train usage at 7%. Vehicle ownership stands at 1.6 per dwelling, exceeding regional averages. According to the 2021 Census, only 9.4% of residents work from home, possibly due to COVID-19 conditions.

Service frequency across all routes averages 20 trips daily, totalling approximately 72 weekly trips per individual stop.

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 shows Seaford Heights residents have relatively positive health outcomes. AreaSearch's analysis found mortality rates and health conditions were largely consistent with national benchmarks.

Common health conditions were seen across both young and old age groups, with asthma and mental health issues being most common at 7.8% and 7.5% respectively. Around 61% of residents had private health cover, compared to 52.7% in Greater Adelaide. About 79% reported no medical ailments, higher than the 67.9% across Greater Adelaide. Working-age residents were notably healthy with low chronic condition prevalence. Only 4.5% of residents were aged 65 and over (77 people), lower than Greater Adelaide's 19.3%. National rankings were broadly in line with the general population.

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, surveyed in June 2021, had above-average cultural diversity with 12.3% of its population speaking a language other than English at home and 26.6% born overseas. Christianity was the predominant religion, accounting for 31.4%. The 'Other' religious category comprised 1.9%, slightly higher than Greater Adelaide's 1.8%.

Ancestry-wise, Seaford Heights had notably high percentages of English (36.7%), Australian (25.6%), and Other (6.5%) ancestry. Specific ethnic groups with notable divergences were Croatian (1.0% vs regional 0.5%), Sri Lankan (0.5% vs 0.2%), and Dutch (1.6% vs 1.2%).

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

At 28 years, Seaford Heights' median age is significantly younger than Greater Adelaide's average of 39 years and is substantially lower than the Australian median of 38 years. Compared to Greater Adelaide, Seaford Heights has a higher proportion of residents aged 25-34 (31.7%) but fewer residents aged 65-74 (2.6%). This concentration of 25-34 year-olds is notably higher than the national average of 14.4%. According to post-2021 Census data, the 85+ age group has increased from 0.3% to 1.1% of the population, while the 45-54 age cohort has decreased from 10.5% to 7.7%. Demographic projections suggest that Seaford Heights' age profile will change significantly by 2041. The 85+ age group is projected to grow steadily, with an increase of 7 people (38%) from 18 to 26 individuals. Notably, the combined 65+ age groups are expected to account for 100% of total population growth, reflecting the area's aging demographic trend. In contrast, both the 65-74 and 45-54 age groups are projected to decrease in numbers.