IRSAD
Relative Socio-economic Advantage and Disadvantage
Score 1,038
Measures relative socio-economic advantage and disadvantage.
Within AustraliaDecile 8 of 10
Within Western AustraliaDecile 8 of 10
For state-level context, explore the Western Australia economy.
Housing
Southern Brook
Western Australia · Census 2021
Median house price not tracked for this suburb
Southern Brook is a bushland suburb of Northam.
Median house price
No open median house price for Southern Brook.
Western Australia sells its property sales records through licensed brokers rather than publishing them openly, so there is no official suburb median we can show. ABS median established-house price, Greater Perth: $1.0M; Rest of WA: $661k.
How it compares
Household income / wk61st percentile
<$450ABS Census 2021$3,750+
Percentiles rank this suburb against Western Australia suburbs that carry the metric — never across states, and never against suburbs where it is missing. Price references are ABS median established-house transfer prices for the Mar 2026 quarter (CC BY 4.0); the suburb figure is a Valuer-General median over a different window, so read the gap as indicative. Income references are the Census 2021 median of the middle suburb in Western Australia and nationally, not a household-weighted median.
People & housing
Population
91
Median age
42 yrs
Income / person / wk
$725
Household income / wk
$1,874
▲ 14% vs WA
Median rent / wk
$150
Mortgage / month
$1,900
Housing stock
28 occupied private dwellings
ABS Census 2021 (CC BY 4.0). Withheld for very small populations — under 100 residents, or under 50 dwellings, households or workers for the shares that count those.
Socio-economic profile
IRSD
Relative Socio-economic Disadvantage
Score 1,070
Measures relative socio-economic disadvantage only; a higher score means less disadvantage.
Within AustraliaDecile 9 of 10
Within Western AustraliaDecile 9 of 10
IER
Economic Resources
Score 1,066
Measures access to economic resources, including income, housing costs and assets.
Within AustraliaDecile 8 of 10
Within Western AustraliaDecile 7 of 10
IEO
Education and Occupation
Score 1,073
Measures relative education and occupation characteristics.
Within AustraliaDecile 9 of 10
Within Western AustraliaDecile 9 of 10
Scores are standardised across Australia to a mean of 1,000 and a standard deviation of 100. Deciles run from 1 (most disadvantaged) to 10 (least disadvantaged).
Source: ABS SEIFA 2021 (CC BY 4.0).
Terrain & hazard exposure
Median elevation
245 m
range 193–317 m
Land below 5 m
0%
0% below 2 m
Shares are the proportion of the suburb's land area. Land where Landsat saw water in at least 1% of clear passes since 1987, excluding permanent water and filtered by DEA's confidence layer. Satellites miss flood peaks, so this is a floor, not a risk estimate; dense high-rise cores can still register tower shadow as water. Designated for development control; a designation, not a prediction of fire behaviour. Elevation is orthometric height from a 30 m model; no hydrology or drainage is modelled. No open statutory flood layer is published for Western Australia yet.
Schools by sector
- Nearest secondary
- 17.3 km
School sector & type: ACARA (Australian Curriculum, Assessment and Reporting Authority), School Location dataset.
Local council
- Council (LGA)
- Northam
- Population
- 12,758 (2025) · +2.5% in a year
- Area / density
- 1,431 km² · 9/km²
- Council medians (2021)
- age 43 · $1,316/wk household income · $250/wk rent
- Council-wide house median (2023-24)
- $330k
- Federal grants
- $4.64M in 2025-26 · $364/resident
- Website
- northam.wa.gov.au
Council boundaries and the suburb split: ABS ASGS LGA 2024, allocated by 2021 mesh block and weighted by Census 2021 residents. Population: ABS Estimated Resident Population 2025. Medians: ABS Census 2021. House median: ABS Data by Region, established-house transfers across the whole council, financial year 2023-24. Federal grants: Financial Assistance Grants, Dept of Infrastructure. ABS and Dept of Infrastructure data CC BY 4.0; council website from Wikidata (CC0).
Representation
- Federal division
- Bullwinkel
- Federal MP
- Trish Cook (ALP)
- Two-party-preferred
- Labor 51% 2PP
- State electorate
- Central Wheatbelt
- State MP
- Lachlan Hunter (NAT)
Similar suburbs
Closest demographic & amenity profile, nationally.
Sources: ABS ASGS boundaries (CC BY 4.0); ABS Census 2021 (CC BY 4.0); Australian Electoral Commission (CC BY 4.0); Geoscience Australia 1 Second DEM-S (CC BY 4.0); DEA Water Observations Statistics, Geoscience Australia (CC BY 4.0); Bush Fire Prone Areas (OBRM-026), Office of Bushfire Risk Management WA (CC BY 4.0); Wikipedia state-member tables (CC BY-SA 4.0). Not financial advice.