Seacombe Heights
The suburb sits in the 71.8th income percentile nationally, and 97.7% of its 1,549 residents live in separate houses, a detached-house share well above the national average. University qualifications reach 41%, which is 10.9 percentage points above the national figure, and the overseas-born share of 28.8% sits 7.2 points higher than the national rate. With 84.3% of residents staying put between census years, stability rather than churn defines the street-level character.
Local council: Marion
Population
1,549
Median Age
40.0
Household IncomeiMedian weekly household income (ABS Census)
$1,917/wk
DAs (12 months)iDevelopment Applications lodged in the past year
8
Median House
$1.2M
First quarter 2026
That growth rate is well above typical SA suburban averages and warrants close attention from buyers timing their entry. Stock is overwhelmingly detached, with 97.7% separate houses and only 2.3% semi-detached, meaning supply is low and competition for listings stays tight. Bedroom distribution leans toward family sizes: 55.7% of dwellings have three bedrooms and 38.7% have four or more. Monthly mortgage repayments average $1,850, producing a mortgage-to-income ratio of 22.3%, which is below the 30% stress threshold even at the current price level, because household income sits in the 71.8th percentile nationally.
For Buyers
That growth rate is well above typical SA suburban averages and warrants close attention from buyers timing their entry. Stock is overwhelmingly detached, with 97.7% separate houses and only 2.3% semi-detached, meaning supply is low and competition for listings stays tight. Bedroom distribution leans toward family sizes: 55.7% of dwellings have three bedrooms and 38.7% have four or more. Monthly mortgage repayments average $1,850, producing a mortgage-to-income ratio of 22.3%, which is below the 30% stress threshold even at the current price level, because household income sits in the 71.8th percentile nationally.
For Investors
The investment profile is mixed. The 13.4% renter share is well below the national average, limiting the tenant pool. Vacancy sits at 5.4%, elevated enough to indicate supply-demand looseness in the rental segment. Development activity is quiet, with only 9 applications in the past 12 months, most being additions and improvements rather than new dwellings, so new supply is not the issue.
Development Activity
Total DAs
50
Last 12 Months
8
YoY ChangeiYear-over-year change in DA lodgements
+33.3%
Avg DA CostiAverage estimated cost per DA in the past year
N/A
Monthly DA Lodgements
DA Categories
Schools in Seacombe Heights
Open-register school locations for education access. This is not a school-quality ranking.
Seaview High School
Demographics
The median age of 40 matches the national figure, so Seacombe Heights sits at the national midpoint on age rather than skewing older or younger. Overseas-born residents make up 28.8% of the population, which is 7.2 percentage points above the national rate. Ancestry is predominantly Anglo-Celtic, led by English (643), Scottish (161) and Irish (158), followed by German (116). University qualifications at 41% run 10.9 points above the national average, reflecting a professional and educated resident base. Average household size of 2.6 is slightly above the national figure. Couples with children (549 families) outnumber couples without children (388), pointing to a family-formation cohort rather than an empty-nester-dominated area.
Age Distribution
Bedrooms
Dwelling Structure
97.7%
Houses
2.3%
Townhouse
0.0%
Apartment
Tenure
Tenure skews toward ownership, with 37.4% owning outright and 49.2% on a mortgage, compared to just 13.4% renting. That renter share is lower than the national average, reinforcing the suburb's owner-occupier character. The stock is almost entirely detached houses at 97.7%, with three-bedroom homes making up 55.7% and four-plus bedrooms 38.7%, a bedroom profile that sits above what many comparable SA suburbs offer. Despite the high price, mortgage-to-income at 22.3% and rent-to-income at 19.8% both remain below stress thresholds, because incomes in this postcode rank in the 71.8th percentile nationally.
Mortgage / mo
$1,850
Rent / wkiABS Census 2021 median across all dwelling types. Current market rents are typically higher.
$380
Census 2021
HH Size
2.6
Personal Income / wk
$815
Vacancy Ratei% of dwellings unoccupied on Census night (ABS 2021)
5.4%
Unoccupied
33
Rent / IncomeiMedian rent as % of household income. Over 30% = housing stress
19.8%
Mortgage / IncomeiMedian mortgage as % of household income. Over 30% = housing stress
22.3%
Community Profile
Languages Spoken at Home
Ancestry
Household Composition
46.0%
Couples with children
41.4%
Couples, no children
10.0%
Single parent
461
Total families
Economy & Employment
Healthcare dominates the local employment base at 24.2% of employed residents (135 workers), nearly double the share of the next sectors, Construction at 13.8% (77 workers) and Education at 13.3% (74 workers). Manufacturing and Public Administration each contribute 7.0%. By occupation, Professionals are the largest group at 201 workers, followed by Clerical/Admin (112), Community/Personal Services (99) and Managers (94). The unemployment rate of 4.7% sits close to the national rate, and the full-time employment rate of 59.6% is moderate. The participation rate of 62.5% implies a meaningful share of residents not actively employed, partly because household income in the 71.8th percentile nationally gives some households financial flexibility to stay out of the labour force.
Unemployment
4.5%
Labour Force
821
Unemployed
37
Source: ABS Census 2021
Socio-Economic Indexes (SEIFA)iABS index ranking suburbs from 1 (most disadvantaged) to 10 (most advantaged)
Full-time
56.9%
Part-time
38.5%
Participation
65.4%
Employed
784
Full-time and part-time are shares of the employed. Source: ABS Census 2021
Occupations
Top Industries
University
41.0%
Postgraduate
10.1%
Born Overseas
28.8%
Dwellings
573
Transport to Work
Car dependency is high, with 89.8% of residents driving to work, well above the national average, and just 4.7% using public transport. Walking and cycling is minimal at 0.7%. Crime sits at 20.7 incidents per 1,000 residents (32 total), a rate that is low given the suburb's urban position and consistent with the low-crime-rate identity signal for this area. Only 3.9% of residents (58 people) need daily assistance, which is low and reflects a relatively healthy, working-age population. No schools are recorded inside the suburb boundary, so families use institutions in neighbouring postcodes. The compact 0.84 km2 footprint and high owner-occupier rate of 86.6% (combined outright and mortgage) create a stable residential environment where housing stress is limited by the mortgage-to-income ratio staying at 22.3%.
Drive
78.1%
Public Transport
4.7%
Walk / Cycle
0.6%
Work from Home
12.4%
Growth Outlook
Population-level forecasts are not available in this dataset, but residential turnover is low: only 15.7% of households moved in the census year, meaning 84.3% stayed, well above national mobility norms. This stability dampens supply by reducing the number of listings relative to demand. Development applications in the past 12 months number just 9, focused on extensions and improvements rather than new dwellings, so supply growth is incremental. The suburb's income position in the 71.8th percentile nationally and its detached-house scarcity on a 0.84 km2 footprint both underpin continued price support.
Population trend: Marion council area
Seacombe Heights sits in the Marion council area. These are the council area's residents, not Seacombe Heights's.
Residents 2025
101,229
Growth, 5 yr average
+1.2%/yr
2020 to 2025
Growth, last year
+1.2%
2024 to 2025
ABS Estimated Resident Population by LGA, 30 June each year; council area, not this suburb
Safety & Crime
Total Offences
32
Year ending June 2024
Rate per 1,000 People
20.7
Source: Crime Statistics Agency Victoria / SA Police
National Ranking iPercentile rank among ~15,000 AU suburbs. 90% = higher than 90% of suburbs
How Seacombe Heights compares to ~15,000 Australian suburbs
Frequently Asked Questions
Is Seacombe Heights a good suburb to live in?
Seacombe Heights has a stable, educated population with 41% holding university qualifications, 10.9 points above the national average. Household incomes rank in the 71.8th percentile nationally. Crime is low at 20.7 incidents per 1,000 residents. The main drawback is car dependency, with 89.8% of residents driving to work and limited public transport at 4.7%.
What schools are in Seacombe Heights?
No schools are recorded inside the Seacombe Heights suburb boundary in this dataset. Families rely on schools in neighbouring suburbs. Despite this, the local population is highly educated, with 41% holding university qualifications, which is 10.9 percentage points above the national figure.
Is Seacombe Heights safe?
Crime in Seacombe Heights totals 32 incidents recorded, giving a rate of 20.7 per 1,000 residents. This is a low rate for a suburban area and is consistent with the suburb's low-crime-rate classification. Only 3.9% of residents need daily assistance, another indicator of a stable, low-disadvantage community.
How is Seacombe Heights's population changing?
Population-level forecasts are not available for Seacombe Heights in this dataset. The current population is 1,549 across a 0.84 km2 area, giving a density of 1,843 people per km2. Residential turnover is low at 15.7%, with 84.3% of households remaining stable between census periods, which is above average stability nationally.
How to read these comparisons
Phrases like "above the national average" reference the unweighted median across Australian suburbs with more than 1,000 residents, not population-weighted national figures. Suburb-level medians are more useful for ranking suburbs against each other; ABS census headlines are population-weighted (so dominated by Sydney and Melbourne) and can read very differently.
Current baseline (refreshed 2026-05-10): median age 40, university-educated 30.1%, born overseas 21.6%, average household size 2.5 people.
Data sources: ABS 2021 Census (demographics, income, tenure), SA Department for Housing and Urban Development (house prices), state education open registers (school locations), state Crime Statistics agencies (offences), council DA portals (development applications).
Explore Seacombe Heights on the Map
View parcels, zoning overlays, DA applications, schools and more.
Open Interactive Map