Underdale
SAUnderdale is a growing suburb in SA with 2,429 residents.
- SAL code
- 41488
- SA2
- 404031106
- Population
- 2,429
- LGA
- West Torrens
Underdale, SA had 2,429 residents at the 2021 Census, with the broader statistical area showing a 5.1% growth over the last five years. The predominant age group is 25-34 years, and the median age sits at 38. Households are most often couples with children, and those with a mortgage repay a median of $1,786 a month. Around 62.0% of homes are owner-occupied, with the largest single tenure being rented at 38.0%. Most dwellings are separate houses, making up 63.6% of the suburb's housing stock. There is 1 school located inside the suburb. Source: ABS Census 2021 and Estimated Resident Population, with amenity counts from state Open Data and OpenStreetMap.
Population
?2,429
Suburb · Census 2021
5-Year Growth
+5.1%
3yr: +4.2% · 10yr: +10.2%
SA2 · 5yr
Household Income
$1,578/wk
Suburb · Census 2021 median
Median Age
38
Suburb · Census 2021
Socio-Economic Index
?6/10
SA2 · middle-range
Unemployment
?2.3%
SA4 · Q4 2025
Schools
1
1 secondary
Hospitals
No data for this suburb
Childcare services
?3
3 long day
Parks & green space
No data for this suburb
Transport stops
?21
GTFS stops
Dwelling approvals
?32
West Torrens · Feb 2026
Median Weekly Rent
Based on rental bond lodgements recorded by the state government.
Median House Sale Price
Source: state Valuer-General (suburb-level quarterly medians).
→ Calculate stamp duty on this suburb's median price→ Estimate mortgage repayments→ Calculate rental yield (price + median rent)
Safety & Crime
2025 Q4Reported incidents from SA police. Offence rates may not reflect all crime.
Population over time — Lockleys (SA2)
ABS publishes annual estimates only at SA2; Underdale suburb alone is ~2,429 (Census 2021).
Growth at a Glance
Population grew from 11,556 to 14,336 over 24 years, averaging 0.9% per year.
Schools
1 in suburbGovernment school catchment
Intake zonePrimary
Lockleys North Primary School44.8%
- Allenby Gardens Primary School 0.0%
Secondary
Underdale High School
Source: SA Department for Education — School Zones (primary + high). Boundaries can be amended without notice; confirm with the school before relying on enrolment.
Profile
Census snapshot
Housing
Public housing 4.3%Predominantly detached houses (63.6%), mixed tenure (62% own or mortgage), built for families (47% are 3 bed).
Dwelling mix
Tenure
Number of bedrooms
Bushfire & flood risk
Bushfire
Hazard data is not yet available for this state.
Flood
Source: SA DEW Flood Mapping
As of May 2026
Overlap is the percentage of the suburb's land area inside the mapped hazard polygons. Always verify the exact property address with the relevant authority before making decisions.
Planning zones
5 zones in suburb| Code | Zone | % covered | Area |
|---|---|---|---|
| HOUSING_DIVERSITY_NEIGHBOURHOOD | Housing Diversity NeighbourhoodResidential | 37.5% | 0.39 km² |
| SUBURBAN_NEIGHBOURHOOD | Suburban NeighbourhoodResidential | 29.9% | 0.31 km² |
| URBAN_RENEWAL_NEIGHBOURHOOD | Urban Renewal NeighbourhoodResidential | 14.9% | 0.15 km² |
| GENERAL_NEIGHBOURHOOD | General NeighbourhoodResidential | 11.1% | 0.11 km² |
| OPEN_SPACE | Open SpaceRecreation | 6.6% | 0.07 km² |
Source: SA Planning and Design Code Zones (ZONE_SA/2026-04-30/7965b1556505eb71) · As of Apr 2026. Zone boundaries are amended periodically; verify the exact property with the relevant council before relying on permitted use.