Seacliff

Seacliff has seen population growth performance typically on par with national averages when looking at short and medium term trends

Based on AreaSearch's analysis of ABS population updates and address validation, as of November 2025, Seacliff's estimated population is around 2,305. This reflects an increase of 188 people since the 2021 Census, which reported a population of 2,117. The change is inferred from AreaSearch's estimate of the resident population at 2,209 following examination of ABS's latest ERP data release in June 2024 and address validation since the Census date. This level of population equates to a density ratio of 3,157 persons per square kilometer, placing Seacliff in the upper quartile relative to national locations assessed by AreaSearch. Seacliff's growth rate of 8.9% since the 2021 census exceeded the SA4 region (7.3%) and the SA3 area, marking it as a growth leader in the region. Overseas migration was the primary driver of population growth during recent periods.

AreaSearch adopts 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. Looking ahead, population projections indicate an increase just below the median for statistical areas analysed by AreaSearch, with Seacliff expected to increase by 166 persons to 2041 based on aggregated SA2-level projections, reflecting an overall increase of 2.3% over the 17 years.

AreaSearch analysis of residential development drivers sees Seacliff recording a relatively average level of approval activity when compared to local markets analysed countrywide

AreaSearch analysis of ABS building approval numbers allocated from statistical area data shows Seacliff had around 14 new homes approved annually over the past five financial years, totalling approximately 72 homes. As of FY-26, seven approvals have been recorded. This results in an average of 1.7 new residents per year per dwelling constructed between FY-21 and FY-25, indicating a balanced supply and demand creating stable market conditions. The average value of new homes being built is $713,000, suggesting a focus on the premium segment with upmarket properties.

This financial year has seen $4.5 million in commercial development approvals, reflecting the area's residential character. Compared to Greater Adelaide, Seacliff has similar development levels per person, supporting market stability aligned with regional patterns. New building activity consists of 73.0% detached dwellings and 27.0% townhouses or apartments, maintaining the area's suburban identity with a concentration of family homes suited for buyers seeking space.

With around 136 people per dwelling approval, Seacliff exhibits characteristics of a growth area. The latest AreaSearch quarterly estimate projects Seacliff to add 52 residents by 2041. Given current construction levels, housing supply should adequately meet demand, creating favourable conditions for buyers while potentially enabling growth that exceeds current forecasts.

Seacliff has limited levels of nearby infrastructure activity, ranking in the 17thth percentile nationally

No changes can significantly affect a region's performance like modifications to local infrastructure, substantial projects, and planning initiatives. AreaSearch has identified zero projects that are expected to impact this area. Notable projects include Adelaide Public Transport Capacity and Access, Adelaide's Inner And Outer Ring Route Capacity Improvements, North South Corridor, and SA Water Capital Work Delivery Contracts. The following list outlines those most likely to be relevant:.

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

Denotes AI-based impression for illustrative purposes only, not to be taken as definitive under any circumstances. Please follow links and conduct other investigations from the project's source for actual imagery. Developers and project owners wishing us to use original imagery please Contact Us and we will do so.

Employment conditions in Seacliff demonstrate strong performance, ranking among the top 35% of areas assessed nationally

Seacliff has a highly educated workforce with strong representation in essential services sectors. Its unemployment rate is 2.6%, lower than Greater Adelaide's 3.9%.

Employment growth over the past year was estimated at 2.6%. As of September 2025, 1,213 residents are employed, with an unemployment rate of 1.3% below Greater Adelaide's and workforce participation similar to Greater Adelaide's 61.7%. Key employment sectors among residents include health care & social assistance, education & training, and professional & technical services. Seacliff specializes in education & training, with an employment share 1.4 times the regional level, while manufacturing employs only 5.5% of local workers compared to Greater Adelaide's 7.0%.

In the past year, ending September 2025, employment increased by 2.6%, labour force by 3.0%, raising unemployment rate by 0.3 percentage points. By comparison, Greater Adelaide saw employment growth of 3.0% and a decrease in unemployment rate by 0.1 percentage points. State-level data to 25-Nov shows SA employment grew by 1.19% year-on-year, with an unemployment rate of 4.0%, outperforming the national average of 0.14%. Jobs and Skills Australia's national employment forecasts from May-25 project a 6.6% increase over five years and 13.7% over ten years. Applying these projections to Seacliff's employment mix suggests local employment should grow by 6.9% in five years and 14.2% in ten years, though these are simple extrapolations for illustrative purposes only.

The area exhibits notably strong income performance, ranking higher than 70% of areas assessed nationally through AreaSearch analysis

The suburb of Seacliff has one of the highest income levels in Australia, according to the latest data from the Australian Taxation Office (ATO), aggregated by AreaSearch for the financial year 2023. The median income among taxpayers in Seacliff is $62,396, with an average income of $82,993. In comparison, Greater Adelaide's figures are $54,808 (median) and $66,852 (average). Based on a Wage Price Index growth rate of 8.8% since financial year 2023, the estimated current incomes for Seacliff would be approximately $67,887 (median) and $90,296 (average), as of September 2025. According to the 2021 Census, household, family, and personal incomes in Seacliff are around the 67th percentile nationally. Income brackets show that 29.7% of locals (684 people) fall into the $1,500 - $2,999 weekly category, similar to the broader regional trend of 31.8%. Notably, 30.2% of residents earn more than $3,000 weekly, indicating strong purchasing power within the community. After accounting for housing costs, Seacliff residents retain 87.7% of their income, reflecting robust purchasing power. The area's Socio-Economic Indexes for Areas (SEIFA) income ranking places it in the 8th decile.

Seacliff displays a diverse mix of dwelling types, with above-average rates of outright home ownership

The dwelling structure in Seacliff, as evaluated at the latest Census, consisted of 66.3% houses and 33.8% other dwellings (semi-detached, apartments, 'other' dwellings), compared to Adelaide metro's 52.9% houses and 47.2% other dwellings. The level of home ownership in Seacliff was 41.8%, with the remaining dwellings either mortgaged at 33.5% or rented at 24.6%. The median monthly mortgage repayment in the area was $1,950, aligning with Adelaide metro's average, while the median weekly rent figure was recorded at $350, compared to Adelaide metro's $340. Nationally, Seacliff's mortgage repayments were higher than the Australian average of $1,863, and rents were lower than the national figure of $375.

Seacliff has a typical household mix, with a higher-than-average median household size

Family households comprise 72.9% of all households, including 28.7% couples with children, 34.1% couples without children, and 10.1% single parent families. Non-family households account for the remaining 27.1%, with lone person households at 24.2% and group households comprising 2.4%. The median household size is 2.4 people, larger than the Greater Adelaide average of 2.2.

Seacliff shows strong educational performance, ranking in the upper quartile nationally when assessed across multiple qualification and achievement indicators

Educational attainment in Seacliff is notably high, with 43.5% of residents aged 15 and above holding university qualifications as of the latest available data. This figure exceeds both state (25.7%) and SA4 region (28.1%) averages. The area's educational advantage is evident in its Bachelor degree holders (27.7%), postgraduate qualifications (11.4%), and graduate diplomas (4.4%). Vocational credentials are also prevalent, with 30.1% of residents aged 15 and above holding such qualifications, including advanced diplomas (12.3%) and certificates (17.8%).

Educational participation is high, with 26.1% of residents currently enrolled in formal education, comprising 8.2% in primary, 6.9% in secondary, and 6.2% in tertiary education levels.

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

Public transport analysis shows 13 active transport stops operating in Seacliff. These include a mix of train and bus services. The stops are served by 12 individual routes, providing a total of 1,127 weekly passenger trips.

Transport accessibility is rated excellent, with residents typically located 169 meters from the nearest stop. Service frequency averages 161 trips per day across all routes, equating to approximately 86 weekly trips per stop.

Seacliff's residents are relatively healthy in comparison to broader Australia with a fairly standard level of common health conditions seen across both young and old age cohorts

Seacliff's health metrics closely align with national benchmarks, showing a typical range of common health conditions across both younger and older age groups.

Approximately 60% (1,377 people) of Seacliff's total population have private health cover, which is exceptionally high compared to other areas. The most prevalent medical conditions in Seacliff are arthritis and mental health issues, affecting 9.5% and 7.5% of residents respectively. Conversely, 67.7% of residents report having no medical ailments, slightly higher than the Greater Adelaide average of 65.9%. In terms of demographics, 23.1% (532 people) of Seacliff's population is aged 65 and over, lower than the 28.3% recorded in Greater Adelaide. Despite this, health outcomes among seniors in Seacliff are notably strong, even outperforming those of the general population based on available health metrics.

In terms of cultural diversity, Seacliff records figures broadly comparable to the national average, as found in AreaSearch's assessment of a number of language and cultural background related metrics

Seacliff's cultural diversity aligns with the broader area, with 76.2% born in Australia, 89.7% being citizens, and 91.9% speaking English only at home. Christianity is the predominant religion, at 41.4%. Islam's representation is slightly higher than the regional average, 0.7% vs 0.8%.

In terms of ancestry, the top groups are English (33.7%), Australian (22.5%), and Irish (8.8%). Notably, Polish (1.3%) and Welsh (0.8%) are overrepresented compared to the regional averages of 0.9% and 0.7%, respectively. German ancestry is also slightly higher at 5.9%.

Seacliff hosts an older demographic, ranking in the top quartile nationwide

Seacliff's median age is 46 years, significantly higher than Greater Adelaide's average of 39 years and Australia's national average of 38 years. The age profile shows that residents aged 65-74 are particularly prominent, making up 14.7% of the population, compared to the national average of 9.4%. This is significantly higher than Greater Adelaide's average for this age group. Meanwhile, the 25-34 age group makes up only 10.1% of Seacliff's population, which is smaller than the Greater Adelaide average. Between 2021 and present, the 75 to 84 age group has grown from 5.4% to 7.2%, while the 15 to 24 cohort has increased from 9.7% to 11.4%. Conversely, the 55 to 64 age group has declined from 16.2% to 14.3%. Population forecasts for 2041 indicate substantial demographic changes in Seacliff. The 75 to 84 age cohort is projected to grow by 20%, adding 33 residents and reaching a total of 199. Senior residents aged 65 and above will drive 60% of population growth, underscoring the trend of demographic aging in Seacliff. However, population declines are projected for the 55 to 64 age group and the 0 to 4 age cohort.