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ABS 2021 Census · Updated 21 May 2026
South Boulder is a regional centre in Western Australia, Australia, with a population of approximately 1,506, making it a boutique locality. Located approximately 551 km from the Perth CBD, South Boulder is a regional area in Western Australia. The median household income is $96,096 per year.
Strong household incomes in South Boulder underpin solid property demand. Regional positioning means lower entry costs but potentially longer hold periods for capital gains.
Official Australia Post postcode for South Boulder. A postcode may cover multiple suburbs.
Australia Post Postcode Finder →Usual resident population at the most recent census.
Weekly median rent for occupied homes. Live rental data integration coming soon.
Annual median household income (before tax) across all households.
Straight-line distance from the suburb centroid to the nearest capital city CBD. Actual driving distance will be longer.
Estimated 1 school within or near this suburb.
Find schools near South Boulder on My School →Estimated 1 park and green spaces near this suburb.
Monthly median mortgage repayment for households currently paying off a mortgage.
Proportion of separate houses versus units, townhouses, and other home types. Useful for investors assessing rental demand mix.
South Boulder is a smaller community of 1,506 — about 27% of the Western Australia suburb median (5,605) — so investors should factor in the narrower buyer pool and longer average time-on-market. At $96,096/year, household income in South Boulder is within 4% of the Western Australia median ($99,736), placing the suburb firmly in the state's mainstream demographic band. Median weekly rent of $300 equates to $1,300/month — about 104% of the median mortgage repayment of $1,250/month — meaning rental income covers most of a typical owner's repayment and this is a genuine cash-flow suburb before tax benefits. South Boulder is 551 km from Perth, so the local market tracks regional employment and lifestyle drivers more than CBD-driven commuter demand.
How South Boulder stacks up against the median of all Western Australia suburbs in our dataset. Positive values mean South Boulder sits above the state median; negative means below.
| Metric | South Boulder | WA median | Δ vs state |
|---|---|---|---|
| Population | 1,506 | 5,605 | -73% |
| Median household income | $96,096/yr | $99,736/yr | -4% |
| Median rent (weekly) | $300 | $350 | -14% |
| Median mortgage (monthly) | $1,250 | $1,902 | -34% |
| Distance to CBD | 551 km | 20 km | +2655% |
| Separate houses | 79% | 79% | 0pp |
Pre-inspection briefing for South Boulder — every item is derived from public datasets, with full citations in our data sources page.
Limited buy-and-hold upside: a small population of 1,506 means liquidity is thin and capital growth tends to lag the wider Western Australia market over full cycles.
Strong rental coverage: $300/week (~$1,300/month) covers 104% of the $1,250/month median mortgage repayment, so the shortfall sits at just $0/month. Investors targeting positive cash flow should shortlist this suburb.
With 79% houses in a 1,506-person market, renovation margins depend on individual street and aspect rather than any suburb-wide story — do comparable-sales analysis before committing capital.
Run the numbers on a South Boulder property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Capital-growth expectations for South Boulder are modest for 2026 — incomes close to the WA median of $99,736 and a population of 1,506 suggest gains will lag headline metro markets. Rental coverage runs at ~104% of the typical mortgage ($1,300/month rent vs $1,250/month repayment), keeping cash flow in positive or near-neutral territory. The EquitySight investment score of 43/100 places South Boulder in the mid tier of Australian suburbs we profile, and overall investor sentiment is cautious heading into the second half of 2026.
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South Boulder scores 43/100 on our EquitySight investment framework — a moderate rating. That score is driven by a population of 1,506, median household income of $96,096/year and median weekly rent of $300. Whether it fits your portfolio depends on whether you are targeting cash flow, capital growth, or a value-add renovation — all three are scored with suburb-specific numbers elsewhere on this page.
The main demand drivers in South Boulder are a median household income of $96,096/year, a dwelling mix that is 79% separate houses, roughly 1 schools and 1 parks within the catchment. Together these shape both owner-occupier and tenant demand and are the factors we weight most heavily in the suburb's investment score.
South Boulder has a usual resident population of approximately 1,506, compared with a Western Australia suburb median of 5,605 — placing it in the lower half of the state's suburbs by size. Population is the clearest proxy for market depth: more residents mean more transactions and typically a shorter average days-on-market on resale.
South Boulder sits 551 km straight-line from the Perth CBD. This is a regional market where CBD distance is only indicative — local industry diversity and commute alternatives matter more.
The most recent census recorded a median weekly rent of $300 in South Boulder, equating to approximately $15,600/year in gross rental income (state median $350/week). Market rents have typically drifted above the recorded figure — verify against current listings on realestate.com.au and Domain before making an offer.
The median monthly mortgage repayment in South Boulder is $1,250, or approximately $15,000/year (vs $1,902/month state median). Stress-test your own borrowing at rates 1–2 percentage points above today's to make sure you can still service the loan through an RBA tightening cycle.
A median weekly rent of $300 works out to $1,300/month, covering 104% of the median mortgage repayment of $1,250/month. That means rent exceeds the median repayment by roughly $50/month, so on these numbers South Boulder leans cash-flow-positive before accounting for strata, council rates, insurance and maintenance. Actual cash flow depends on your deposit, loan terms, ownership costs and marginal tax rate — run the full numbers in our rental yield calculator.
The main risks are a thin buyer pool (1,506 residents), interest-rate sensitivity on the $1,250 median mortgage, the broader Western Australia market cycle. Each of these is covered in the Risk Factors section above with suburb-specific numbers rather than generic warnings.
Every number on this page comes from the ABS 2021 Census of Population and Housing, Australia Post postcode reference data, and OpenStreetMap amenity tiles. The investment score, strategy verdicts, and comparison table are computed deterministically from those inputs — no opinion, no estimation. See our full methodology and the data sources and licences for the formulas we use.