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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
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Seacliff Park has an estimated 2,709 residents, up from 2,644 at the 2021 Census — a change of 65 people, or 2.5%. That puts 1,183 residents on each square kilometre. Population is estimated from ABS Estimated Resident Population releases and GNAF address data, re-based from the 2021 Census and updated annually.
Detail
As of Aug 2026, the population of the suburb of Seacliff Park is estimated at approximately 2,709, according to AreaSearch evaluations of ABS broader regional updates alongside validated new address additions since the Census. Compared to the 2021 Census count of 2,644 people, this indicates an expansion of 65 people (2.5%). This adjustment builds upon an estimated resident population of 2,699 established by AreaSearch using the latest ABS ERP release (June 2025), coupled with 31 validated new addresses recorded post-Census. Consequently, the suburb of Seacliff Park records a population density of 1,183 persons per square kilometer, aligning closely with typical benchmarks across AreaSearch assessed territories.
Recent population expansion has been predominantly underpinned by overseas migration, accounting for roughly 65.0% of total local population additions. Projections generated for each SA2 by ABS/Geoscience Australia (issued in 2024 utilizing 2022 as baseline data) are implemented by AreaSearch. For non-covered SA2s and intervals following post-2032, population models incorporate the SA State Government's 2023 Regional/LGA age-bracket projections based on 2021 numbers, adjusted via a weighted aggregation framework transitioning LGA trends to SA2 scales. Demographic projections indicate that the suburb of Seacliff Park will experience future expansion trailing slightly beneath the national statistical area median, gaining 203 persons to 2041 under aggregated SA2 models, which represents an overall growth of 7.1% across the 16 years.
Frequently Asked Questions - Population
102 new dwellings have been approved in Seacliff Park over the past five years, an average of 20 a year. That is 8.3 approvals per 1,000 residents. Of the 21 dwellings approved in the latest reporting year, 81% were detached houses and the rest townhouses or apartments. Approvals are currently running at an annualised 9, well below that longer-run average. Figures come from ABS building approvals aggregated to this Suburb (SAL) boundary and are updated monthly as the ABS releases them.
Detail
Residential building approval records analyzed by AreaSearch from ABS statistical metrics indicate that Seacliff Park generates approximately 20 new residential approvals annually, tallying an estimated 102 dwellings approved during the last 5 financial years (between FY-21 and FY-25), with 9 approved during FY-25 to date. An average construction cost of $558,000 per dwelling highlights developer concentration on higher-tier, premium residential projects. Because development has added an average of merely 0.5 new residents per year per dwelling constructed over the past 5 financial years (between FY-21 and FY-25), residential building activity is keeping pace with or exceeding local requirement levels, providing prospective buyers with broader selection and enabling population growth to potentially outpace standard forecasts.
Furthermore, commercial building approvals have reached $14.6 million during this financial year, pointing to a well-balanced commercial pipeline. Dwelling construction per capita in Seacliff Park runs 16.0% above regional average per person over the 5 year period relative to Greater Adelaide, sustaining healthy options for purchasers while reinforcing surrounding property values, even as building volumes have tempered recently. The current development pipeline consists of 81.0% detached houses and 19.0% attached dwellings, preserving the traditional low-density suburban environment and prioritizing spacious family residences. A metric of approximately 316 people per dwelling approval reflects the low-density urban planning framework of the area. Based on the most recent quarterly estimate from AreaSearch, Seacliff Park is forecast to add 193 residents through to 2041. Ongoing residential construction volumes appear well positioned to absorb projected demand, supporting favorable market conditions for purchasers and creating capacity for demographic growth beyond established baseline projections.
Frequently Asked Questions - Development
Development applications around Seacliff Park
Loading development applications…
| 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.
AreaSearch tracks 9 current infrastructure and development projects close to Seacliff Park, worth an estimated $518 million. 4 are already under construction and 2 are due for completion within three years. The pipeline spans residential development, education & training and retail. Records are compiled from Infrastructure Australia, state agencies, council planning portals and public announcements, reviewed and updated daily, then ranked by proximity, construction stage, completion horizon and project scale.
Detail
Local infrastructure programs, major planning initiatives, and strategic regional projects play a critical role in shaping local area performance. AreaSearch has identified a single major project directly influencing the locality, alongside notable surrounding works including the Southern Suburbs Residential Policy Code Amendment, Adelaide Public Transport Capacity and Access, Adelaide's Inner And Outer Ring Route Capacity Improvements, and the North South Corridor.
Professional plan users can use the search below to filter and access additional projects.
INFRASTRUCTURE SEARCH
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Frequently Asked Questions - Infrastructure
Flagstaff Road Upgrade
Upgrade of approximately 3.3 km of Flagstaff Road including duplication of the remaining three-lane section to a permanent four-lane divided carriageway, intersection improvements, upgraded drainage, shared walking and cycling paths, lighting and road safety improvements. Construction has been underway with staged traffic management and community updates.
Westfield Marion Expansion
Major $259 million expansion and renovation of Westfield Marion shopping centre by Scentre Group. Adding 52 specialty shops and 20 eateries, new ground floor mall, four-level carpark facing Diagonal Road. Expanding from 135,300sqm to 152,200sqm. Part of $500 million South Australian development pipeline including new retail spaces, fresh food precinct, dining options, and entertainment facilities. Enhanced parking and contemporary design updates. Creates up to 2,600 construction and retail jobs, strengthening position as premier southern suburbs retail destination.Introduction of paid parking for stays over 3 hours with ticketless system using numberplate recognition.
Residential Development at 1 Greenfield Road
Approved development opportunity for 3 stunning two-storey townhouses with water views on a re-zoned and prepared vacant land parcel. This site was previously subject to a larger mixed-use development application.
Oaklands Green
South Australia's largest social and affordable housing renewal project, transforming 16.5 hectares into a masterplanned community. The development delivers 680 new dwellings, comprising 235 social housing homes managed by Junction and 445 private/affordable homes. The project features 3.4 hectares of open space, including the expansion of Rajah Reserve and sustainable Green Star rated designs. Construction is staged over eight years with the first residents moved in during 2023.
Seaview Downs Primary School Redevelopment
Major upgrade project to deliver contemporary learning areas, new administration building, and demolition of ageing infrastructure, based on contemporary educational philosophies. The project received additional funding totaling $19.3 million.
Southern Suburbs Residential Policy Code Amendment
A proposed planning amendment affecting residential zones in Southern Suburbs, including Seaview Downs, to transition areas to Hills Neighbourhood Zone and facilitate low-density infill development.
OTR Seacombe Road Redevelopment
Upgrade of the existing OTR fuel and convenience site delivering a reconfigured car park, a convenience drive-through, 2.4m acoustic fencing, and new on-site amenities including dog wash and vacuum facilities. The store page indicates drive-through and dog wash services operating, consistent with works being completed.
Seaview High School Upgrade
Facility upgrade delivering a new 2 storey multi purpose Creative Design building, a new single storey Performing Arts facility with associated performance spaces, and refurbishment of an existing building to provide contemporary STEM learning areas. Project value reported at $17.65 million. Architect: Flightpath Architects. Builder: Badge Constructions. Construction completed, with completion reported by industry sources at end of 2022.
1,569 residents of Seacliff Park are employed, from a labour force of 1,609. Unemployment sits at 2.5%, with participation at 71.0%. Weighted for its industry mix, the area's sectors are forecast to grow about 7.0% nationally over five years. That reflects industry composition only and makes no allowance for local population growth. The working-day population is estimated at 2,051, about 76% of the resident population, so more people leave the area for work than travel in. Unemployment and labour force come from ABS Small Area Labour Markets, updated quarterly; the industry and occupation profile is from the 2021 Census.
Detail
As of March 2026, working residents in Seacliff Park number 1,569, within a community characterized by strong educational attainment and solid representation in key essential service industries. Local employment grew by an estimated 4.9% over the past year based on statistical area aggregations from AreaSearch. The local unemployment rate stands at 2.5%, which is 1.3% below Greater Adelaide's 3.8%. Meanwhile, labor force participation is 71.0%, comparing favorably to 66.4% across Greater Adelaide. Working from home accounted for 11.4% of working residents at the Census, although historical Covid-19 lockdown restrictions should be considered.
Health care & social assistance, construction, and education & training represent the primary employment sectors among local workers. Construction shows strong local concentration, with resident workforce participation reaching 1.4 times the regional level. Conversely, manufacturing engages only 4.9% of local employees, below the 7.0% recorded across Greater Adelaide. Comparing Census working population counts with resident workforce totals reveals that the area functions predominantly as a residential suburb with limited internal job opportunities. According to AreaSearch analysis of ABS and SALM statistical aggregations, the recent 12-month period recorded a 4.9% increase in local employment alongside a 4.3% expansion in the total labor force, reducing the local unemployment rate by 0.6 percentage points. Across Greater Adelaide, employment increased by 4.2%, the labor force expanded by 4.0%, and unemployment declined by 0.2 percentage points. Future workplace demand can be evaluated using national industry projections from Jobs and Skills Australia as of Mar-26, which project national job growth of 6.6% over five years and 13.7% over ten years. When weighted against Seacliff Park's specific industry distribution, local employment is projected to expand by 7.0% over five years and 14.4% over ten years (calculated as an illustrative weighted extrapolation that excludes localized demographic projections).
Frequently Asked Questions - Employment
Median household income in Seacliff Park is $1,693 a week (about $88,000 a year), with median personal income at $856 a week. ATO records put median taxable income at $54,832 a year against an average of $70,289. Household income is from the 2021 Census; taxable income is from ATO Taxation Statistics for the latest financial year available, indexed forward using the ABS Wage Price Index.
Detail
Aggregated postcode data from the ATO for financial year 2023 indicates that the suburb of Seacliff Park recorded a median taxpayer income of $54,832 and an average of $70,289, exceeding Greater Adelaide's median of $54,808 and average of $66,852 as well as broader national benchmarks. Accounting for a 10.17% rise in the Wage Price Index since financial year 2023, estimated incomes stand at approximately $60,408 (median) and $77,437 (average) as of March 2026. The 2021 Census placed local personal, family, and household earnings near the 53rd percentile across Australia. The primary earnings cohort includes 32.2% of locals (872 people) within the $1,500 - 2,999 range, tracking closely with the 31.8% metropolitan proportion.
Households retain 85.2% of income after servicing housing obligations, placing the area in the 7th decile of the SEIFA income index.
Frequently Asked Questions - Income
Seacliff Park had 1,041 occupied dwellings at the 2021 Census, 84% detached houses and 3% apartments. 42% are owned with a mortgage, 21% rented and 37% owned outright. At that Census the median rent was $370 a week and the median mortgage repayment $1,800 a month. Rent absorbs 21.9% of household income here and mortgage repayments 24.5%. Dwelling stock, tenure and housing costs are 2021 Census measures — the only source that counts dwellings at this boundary size.
Detail
Residential housing stock in Seacliff Park at the most recent Census was composed of 83.9% houses alongside 16.1% other dwellings (apartments, semi-detached, and 'other' dwellings), contrasting with Adelaide metro proportions of 75.2% houses and 24.9% other dwellings. Outright home ownership reached 37.3%, significantly higher than the Adelaide metro level, while properties with a mortgage accounted for 41.7% and rented properties made up 20.9%. The median monthly mortgage payment of $1,800 was higher than the Adelaide metro figure of $1,562 but remained lower than the national benchmark of $1,863. Median weekly rent sat at $370, above Adelaide metro's $320 yet slightly under the Australian figure of $375.
Frequently Asked Questions - Housing
Seacliff Park counted 1,041 households at the 2021 Census, averaging 2.4 people each. 30% are couples with children, against 28% couples without children. 26% of households are people living alone, and families average 1.5 children. Household and family composition is measured only by the Census, so these are 2021 figures.
Detail
Family dwellings comprise 70.4% of all local households, divided between couples with children at 30.4%, couples without children at 28.0%, and single parent families at 11.2%. Non-family living arrangements account for the remaining 29.6%, including lone person households at 26.1% and group households at 3.7%. The typical household size is 2.4 people, slightly below the Greater Adelaide benchmark of 2.5.
Frequently Asked Questions - Households
31.4% of adults in Seacliff Park hold a university qualification, including 20.9% with a bachelor degree and 7.4% with postgraduate qualifications, higher than 98% of areas nationally. A further 24.5% hold a vocational qualification. Qualifications come from the 2021 Census.
Detail
Educational attainment in the area is prominent, with 31.4% of residents aged 15+ holding a tertiary qualification, exceeding both the SA benchmark of 25.7% and the SA4 region level of 28.1%. Bachelor degrees form the largest segment at 20.9%, followed by postgraduate degrees at 7.4% and graduate diplomas at 3.1%. Technical and vocational credentials are held by 36.7% of residents aged 15+, comprising certificates (24.5%) and advanced diplomas (12.2%). Current student enrollment stands at 26.9% of the local population. Within this student cohort, 8.9% attend primary education, 6.9% are enrolled in secondary education, and 5.4% are undertaking tertiary studies.
Frequently Asked Questions - Education
Schools Detail
Public transport in Seacliff Park reaches 17 stops on 13 routes, timetabled for about 1,200 services a week. The typical home sits about 180 m from its nearest stop. Buses carry the largest share of public transport commuters. Households keep an average of 1.5 vehicles. Stop and service counts are built from operators' published GTFS timetables and refresh with each timetable release; vehicle ownership is from the 2021 Census.
Detail
Public transport connectivity within Seacliff Park comprises 17 active bus stops operated across 13 distinct routes, providing a combined total of 1,194 weekly passenger trips. Commuter accessibility is high, with residents located an average distance of 179 meters from their nearest transit stop. Given the area's established residential profile, the vast majority of workers travel outbound, with private vehicles accounting for 87% of commutes and train travel representing 8%. Average vehicle ownership is 1.5 per dwelling. In addition, 11.4% of working residents worked from home at the 2021 Census, subject to potential COVID-19 influences.
Transit service schedules across all local routes deliver an average of 170 trips per day, which equates to roughly 70 weekly trips per individual transit stop.
Frequently Asked Questions - Transport
Transport Stops Detail
70.8% of residents in Seacliff Park report no long-term health condition. 5.0% need daily assistance with core activities, and 54.8% hold private health cover. The standardised death rate runs at 4.9 per 1,000 residents. Health conditions, assistance needs and insurance are 2021 Census measures; the death rate comes from current ABS releases.
Detail
Health indicators compiled by AreaSearch show strong outcomes across Seacliff Park, with low incidence of common chronic ailments across both younger and older cohorts and low mortality rates. Private health insurance coverage is solid, held by approximately 55% of the total population (~1,483 people), compared to 52.7% throughout Greater Adelaide. Arthritis and asthma are the most prevalent health conditions recorded locally, diagnosed in 7.6 and 7.3% of residents, respectively, while 70.8% of the community reported having no long-term medical conditions, surpassing the 67.9% average for Greater Adelaide. The working-age demographic demonstrates particularly low disease incidence.
Residents aged 65 and over represent 20.9% of the population (566 people), above the 19.1% share in Greater Adelaide, with local senior health rankings aligning well with broader nationwide averages.
Frequently Asked Questions - Health
26.5% of Seacliff Park residents were born overseas and 11.9% speak a language other than English at home. The largest reported ancestries are English (31.2%) and Australian (26.3%). Ancestry, language and country of birth are counted only by the Census, so these are 2021 figures.
Detail
Cultural diversity metrics show that 26.5% of Seacliff Park residents were born overseas and 11.9% speak a non-English language at home. Christianity is the primary religion, observed by 40.6% of the population. The most prominent positive variation occurs within Other religious affiliations, which encompass 2.2% of local residents compared to 1.8% across Greater Adelaide. Parental country of birth statistics identify the three largest ancestry groups in Seacliff Park as English (31.2%), Australian (26.3%), and Other (8.3%). In addition, specific cultural groups show notable local presence above regional averages: German ancestry accounts for 5.9% (vs 5.1% regionally), Polish represents 1.2% (vs 1.0%), and Russian comprises 0.4% (vs 0.3%).
Frequently Asked Questions - Diversity
The median resident of Seacliff Park is 41. 24.6% of residents are aged 15 to 34. Age cohorts are not raw Census counts: the Census split is re-based to the latest ABS population estimates and state projections.
Detail
The demographic profile of Seacliff Park closely mirrors Greater Adelaide across each major life stage, with the maximum divergence between the four primary cohorts reaching 2.8 percentage points. The median age is estimated at 41, matching the figure from the 2021 Census and remaining 2 years older than the Greater Adelaide median of 39 recorded at that time. Since the Census, the proportion of children and young adults (0 - 24) has shifted from 28.1% to an estimated 29.2%. Between now and 2041, the largest numerical expansion is forecast within the retiree and elderly cohorts (65+), increasing by 94 residents (17%) to reach 660.
Frequently Asked Questions - Age
Data & MethodBoundaries, Sources & Method for Seacliff Park
9 of 14 data sections on this page were updated within the last 12 months — the newest current to Sep 2026.
Everything is aggregated to the Suburb (SAL) boundary shown above, on a 2021 Census baseline. Only 3 sections — housing, households and cultural diversity — still wait on the 2026 Census.
The ledger — source, cycle and currency by section
| Section | Source & update cycle | Currency |
|---|---|---|
| Updated within the last 12 months 9 sections | ||
| Population | ABS, GNAF, Geoscience Australia Annual (ABS ERP) | Aug 2026 2 months ago headline measures · 2021 Census baseline |
| Re-based to the ABS Estimated Resident Population (June 2025 release) and updated with new dwellings from GNAF address data. Current to Aug 2026, with the 2021 Census supplying the small-area baseline. | ||
| Age profile | ABS, Geoscience Australia, State governments Annual | Aug 2026 2 months ago headline measures · 2021 Census baseline |
| Age cohorts are re-based to the latest ABS population estimates and state projections, current to Aug 2026. Each cohort is held as a Census baseline and a current estimate. | ||
| Development & approvals | ABS, GNAF Monthly (ABS approvals) | Aug 2026 2 months ago headline measures · Jul 2026 baseline |
| Property sales & rents | Valuer General, Rental Board, ABS Weekly sales, quarterly rents | Sep 2026 last month all 21 measures |
| Sales from the state Valuer General register, refreshed weekly, and rents from quarterly rental bond lodgements. Both are read live each time this page loads, current to Sep 2026. | ||
| Infrastructure projects | Infrastructure Australia, Local governments Daily | May 2026 5 months ago all 2 projects tracked here |
| Project pipeline maintained continuously from Infrastructure Australia, state agencies, local government and public announcements. Records are added and revised daily; this area was last updated May 2026. | ||
| Employment | ABS, DEWR, JSA Quarterly (ABS SALM) | Mar 2026 7 months ago headline measures · 2021 Census baseline |
| Unemployment and labour force from ABS Small Area Labour Markets, current to Mar 2026. The growth outlook applies Department of Employment (now Jobs and Skills Australia) forecasts for all 19 industry divisions to the local industry mix, so it measures sector composition rather than local expansion and makes no allowance for population growth. Job demand comes from the same agency via its Internet Vacancy Index; industry and occupation structure from the 2021 Census. | ||
| Education | ABS, ACARA Annual (ACARA) | Sep 2026 last month headline measures · 2021 Census baseline |
| Transport | ABS, State Transport Departments Each timetable release | Jul 2026 3 months ago headline measures · 2021 Census baseline |
| Services & amenities | Provider directories, ACECQA Continuous | Sep 2026 last month all 14 measures |
| Annual and financial-year sources 2 sections | ||
| Income | ABS, ATO Annual (ATO) | FY 2023 3 years ago headline measures · 2021 Census baseline |
| ATO taxable income statistics for FY 2023, indexed forward using the Wage Price Index. Census household income provides the distribution detail. | ||
| Health | ABS, ATO Annual | 2024 2 years ago headline measures · 2021 Census baseline |
| Census-measured — next update: 2026 Census 3 sections No more current small-area source exists for these, so they are labelled as Census-measured rather than implied to be current. | ||
| Housing | ABS 5-yearly (Census) | 2021 Census next update 2026 all 30 measures |
| Households | ABS 5-yearly (Census) | 2021 Census next update 2026 all 18 measures |
| Cultural diversity | ABS, Geoscience Australia 5-yearly (Census) | 2021 Census next update 2026 all 44 measures |
"Currency" is the most recent release feeding that section. Where the Census supplies the structural baseline underneath a current headline figure, the row says so.
How the numbers are built
Population
The Census provides the small-area baseline, aggregated from mesh blocks to this boundary. It is then re-based to the ABS Estimated Resident Population (June 2025 release), and new dwellings built since Census night are counted from address data — 31 validated new addresses here. The headline figure is therefore a current estimate for Aug 2026, not a 2021 count (2,644 at the 2021 Census → 2,709 now). Annual growth rates are compound (CAGR), not simple averages.
Age profile
Cohort shares are not raw Census counts. Every cohort is held as a pair — the Census baseline and a current estimate — and the split is re-based using ERP and state population projections, current to Aug 2026. Median age is the Census median plus modelled change since. Charts that show both are labelled "2021 Census vs Current Estimate".
Property sales
Sourced from the state valuation authority's sales register — current, not Census, and refreshed weekly. Medians are calculated from settled transactions in the period shown; periods with very low transaction counts are flagged or suppressed, because a handful of sales can move a median substantially.
Rents
Derived from state rental bond lodgement data, by dwelling type and bedroom count. Bonds are lodged at the start of a new tenancy, so this reflects new lettings, not the whole rented stock.
Development & infrastructure
Building approvals come from current ABS releases; development applications are collected from council and state planning portals; the infrastructure pipeline is compiled from Infrastructure Australia and local government sources. Applications are matched to this boundary by address or coordinates, so very recent lodgements may not yet appear.
Employment & income
Industry and occupation structure comes from the Census, but the headline labour-market indicators do not. Unemployment and labour force are derived from ABS Small Area Labour Markets (quarterly). The employment outlook applies Department of Employment forecasts for all 19 industry divisions to this area's own industry mix (the agency is now Jobs and Skills Australia), as does the Internet Vacancy Index used for job demand. Because it is weighted on industry composition alone, that outlook carries no allowance for local population growth — in fast-growing areas the real rise in local jobs will typically be higher. Income combines Census household income with ATO taxable-income statistics for FY 2023, indexed forward using the Wage Price Index.
Education, transport & amenities
School enrolments, ICSEA and performance come from ACARA's current release, not the Census. Public transport stops and service frequency are derived from GTFS timetable feeds published by state transport departments. Services and amenities are proximity and count scores built from provider directories, refreshed on their own cycle. The Census contributes only the travel-to-work and qualification measures.
Rankings and benchmarks. Where we rank this area, the comparison set is every area of the same boundary type — suburbs against suburbs, SA2s against SA2s. Benchmarks compare this area against its greater capital city region and the national figure for the same measure and period.
Limits worth knowing. Small areas carry larger error margins, and the ABS introduces small random adjustments to Census counts to protect confidentiality — so totals may not sum exactly. Estimates re-based from regional data describe the area's expected trajectory, not a direct count of it. Figures are indicative for research and are not financial, planning or valuation advice.
Cross-check us. The Census baseline for this boundary is at ABS 2021 Census QuickStats (SAL41312). QuickStats reports 2021 only — the figures on this page are more current wherever the ledger shows a later date.