Isabella Plains
Public administration accounts for 29.8% of local employment, a notable concentration for a suburb of 4,329 people. Isabella Plains has a density of 1,735.1 people per square kilometre across 2.5 square kilometres, while household income sits at the 81.4th percentile. Its median age of 36 is 4 years below the national comparison, although the area is aging because its senior share has increased by 7.6 percentage points. Compared with nearby Monash and Richardson, Isabella Plains reads as an established detached-home mortgage market rather than a rapid-growth precinct. Annual growth is -0.21%, with overseas migration the primary driver, so its appeal is tied more to established housing and services than expansion.
Population
4,329
Median Age
36.0
Household IncomeiMedian weekly household income (ABS Census)
$2,131/wk
DAs (12 months)iDevelopment Applications lodged in the past year
2
Isabella Plains suits buyers seeking established family housing, with 75.5% of dwellings classified as separate houses and 60.2% containing 3 bedrooms. A further 30.3% have 4 or more bedrooms, giving larger households more choice than compact-dwelling markets. The mortgage benchmark is $1,880 per month, while mortgage costs equal 20.4% of household income, below the 21.1% rent-to-income share. Because 48.5% of households have a mortgage, competition for suitable homes may centre on established owner-occupier stock. The 24.5% semi-detached share provides some lower-density alternatives, but it remains lower than the separate-house share.
For Buyers
Isabella Plains suits buyers seeking established family housing, with 75.5% of dwellings classified as separate houses and 60.2% containing 3 bedrooms. A further 30.3% have 4 or more bedrooms, giving larger households more choice than compact-dwelling markets. The mortgage benchmark is $1,880 per month, while mortgage costs equal 20.4% of household income, below the 21.1% rent-to-income share. Because 48.5% of households have a mortgage, competition for suitable homes may centre on established owner-occupier stock. The 24.5% semi-detached share provides some lower-density alternatives, but it remains lower than the separate-house share.
For Investors
The rental market has a 19.4% renter share, a 4.0% vacancy rate and a weekly rent of $450. That renter proportion is lower than the 28.3% outright-owner share, indicating a primarily owner-occupier suburb rather than a heavily rental-dependent market. Rent growth of 16.9% provides a positive recent signal, but annual population growth is -0.21%, so investors should not assume strong demand from rapid expansion. Overseas migration is the primary migration driver, while only 2 development applications were recorded over 12 months. Compared with higher-turnover markets, the case here is more likely to depend on stable household demand and careful property selection.
Development Activity
Total DAs
29
Last 12 Months
2
YoY ChangeiYear-over-year change in DA lodgements
-66.7%
Avg DA CostiAverage estimated cost per DA in the past year
N/A
Monthly DA Lodgements
DA Categories
Schools in Isabella Plains
Open-register school locations for education access. This is not a school-quality ranking.
Isabella Plains Early Childhood School
St Mary Mackillop College - Senior Campus
Demographics
Isabella Plains has a median age of 36, which is 4 years below the national comparison, but its aging trajectory is visible in the 7.6 percentage-point increase in the senior share. University attainment is 34.1%, or 4 percentage points above the national benchmark, while the overseas-born share is 23.6%, 2 points above national levels. Average household size is 2.6 people, 0.1 above the national comparison. Families shape local demand because 47.4% of families are couples with children, compared with 34.1% couples without children and 17.7% one-parent families. English, Irish and Scottish ancestry are prominent, alongside Indian ancestry and Arabic, Punjabi and Malayalam language groups.
Age Distribution
Bedrooms
Dwelling Structure
75.5%
Houses
24.5%
Townhouse
0.0%
Apartment
Tenure
Detached housing defines Isabella Plains: separate houses account for 75.5% of dwellings, compared with 24.5% semi-detached homes. The bedroom mix is weighted toward 3-bedroom dwellings at 60.2%, followed by 4 or more bedrooms at 30.3%, so the stock aligns with established family households. Tenure is also mortgage-led, with 48.5% of households paying a mortgage, 28.3% owning outright and 19.4% renting. Mortgage costs equal 20.4% of household income, lower than the 21.1% rent-to-income share. Compared with nearby Monash and Richardson, the clearest local distinction is the suburb's strong detached-house emphasis and established, low-rise character.
Mortgage / mo
$1,880
Rent / wkiABS Census 2021 median across all dwelling types. Current market rents are typically higher.
$450
Census 2021
HH Size
2.6
Personal Income / wk
$1,084
Vacancy Ratei% of dwellings unoccupied on Census night (ABS 2021)
4.0%
Unoccupied
68
Rent / IncomeiMedian rent as % of household income. Over 30% = housing stress
21.1%
Mortgage / IncomeiMedian mortgage as % of household income. Over 30% = housing stress
20.4%
Community Profile
Languages Spoken at Home
Ancestry
Household Composition
47.4%
Couples with children
34.1%
Couples, no children
17.7%
Single parent
1,226
Total families
Economy & Employment
The local economy is anchored by public administration at 29.8% of industry employment, followed by healthcare at 17.3%, construction at 9.6%, professional and technical services at 8.7% and education at 8.5%. This mix supports both government-linked and service-sector employment, while occupations include 496 professionals, 404 clerical and administrative workers, 337 trades workers and 299 managers. Labour-force participation is 68.6%, unemployment is 3.4% and the full-time employment rate is 66.7%. Household income of $2,131 per week ranks at the 81.4th percentile. The IER decile of 8 is higher than the IEO decile of 7, suggesting economic resources are stronger than some occupational measures alone imply.
Unemployment
3.4%
Labour Force
2,354
Unemployed
80
Source: ABS Census 2021
Socio-Economic Indexes (SEIFA)iABS index ranking suburbs from 1 (most disadvantaged) to 10 (most advantaged)
Full-time
66.7%
Part-time
26.1%
Participation
68.6%
Employed
2,274
Full-time and part-time are shares of the employed. Source: ABS Census 2021
Occupations
Top Industries
University
34.1%
Postgraduate
8.3%
Born Overseas
23.6%
Dwellings
1,605
Transport to Work
Daily travel is strongly car-led, with 80.4% of commuters driving and only 3.1% using public transport; walking or cycling accounts for 0.6%, while 9.9% work from home. This is a practical fit for households with cars, but less convenient than more transit-oriented parts of Canberra. Local education access includes 2 campuses spanning a government early childhood school and a non-government senior campus, with enrolment zones worth checking against the exact address. Isabella Plains records an IRSAD decile of 7, an IRSD decile of 7, an IER decile of 8 and an IEO decile of 7, placing several socioeconomic measures above the middle of the national scale. Its density of 1,735.1 people per square kilometre supports a compact suburban layout.
Drive
80.4%
Public Transport
3.1%
Walk / Cycle
0.6%
Work from Home
9.9%
Population Forecast
-0.21%/yr
(-9 people/yr)
EstablishedIsabella Plains is an established, slow-growth suburb: the forecast annual trend is -0.21%, while population change across the wider area is 0.3% over 10 years. Overseas migration is the primary driver, but the trajectory is labelled Aging, reflecting a 7.6 percentage-point rise in the senior share and a 0.9-point decline in the young share. The working-age share has also fallen by 1.7 points. This makes growth weaker than a conventional expansion corridor because demand is shaped more by household turnover and ageing than by large-scale new supply. Gentrification is not indicated, with a score of 0 and a stage of Not gentrifying. Affordability is labelled Improving, moving from 44.7 in 2011 to 41.5 in 2021.
Historical + Forecast
Hamilton-Perry + Holt smoothing on ERP 2001-2025
Age Cohort Forecast
Primary Driver
Overseas Migration
Net Overseas / yr
+21
Net Internal / yr
-54
Gentrification Signal
Not gentrifying
National Ranking iPercentile rank among ~15,000 AU suburbs. 90% = higher than 90% of suburbs
How Isabella Plains compares to ~15,000 Australian suburbs
Frequently Asked Questions
Is Isabella Plains a good suburb to live in?
Isabella Plains can suit households seeking established family housing, with 75.5% separate houses, an average household size of 2.6 and 2 local school campuses. Car dependence is high at 80.4%, compared with 3.1% using public transport, so it is better suited to residents who value driving access.
What is the median house price in Isabella Plains?
A current median house price is not available for a reliable statement. The main affordability markers are a mortgage benchmark of $1,880 per month and weekly rent of $450. Mortgage costs equal 20.4% of household income, so buyers should compare recent sales for the exact dwelling rather than use rent as a sale-price substitute.
What schools are in Isabella Plains?
Isabella Plains has 2 listed campuses: Isabella Plains Early Childhood School, a government school, and St Mary Mackillop College's Senior Campus, a non-government school. Families should check enrolment zones, year-level availability and transport arrangements for the exact address because school access can vary across nearby suburbs.
Is Isabella Plains safe?
A suburb-level crime rate is not available here, so the population of 4,329 and density of 1,735.1 people per square kilometre should not be treated as a safety rating. Check recent ACT Police information and inspect the exact street, lighting, parking and pedestrian conditions before making a decision.
Is Isabella Plains good for property investment?
Isabella Plains has a $450 weekly rent, 4.0% vacancy rate and 19.4% renter share. Rent growth of 16.9% is supportive, but annual forecast growth is -0.21% and only 2 development applications were recorded over 12 months. Investors should prioritise property condition and tenant appeal over expectations of rapid capital growth.
How is Isabella Plains's population changing?
Change is broadly stable but ageing. The suburb has 4,329 residents, forecast annual growth of -0.21% and wider-area population change of 0.3% over 10 years. The senior share has risen 7.6 percentage points, while the young share has fallen 0.9 points. Overseas migration is the primary growth driver.
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), state education open registers (school locations), state Crime Statistics agencies (offences), council DA portals (development applications). Population forecasts use a Hamilton-Perry cohort model calibrated to ABS ERP.
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