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ABS 2021 Census · Updated 21 May 2026
Thomson Brook is a regional centre in Western Australia, Australia, with a population of approximately 89, making it a boutique locality. Located approximately 186 km from the Perth CBD, Thomson Brook is a regional area in Western Australia. The median household income is $50,232 per year.
Lower income levels in Thomson Brook typically translate to more affordable entry points for investors. As a regional location, growth prospects depend on local economic conditions and infrastructure investment.
Official Australia Post postcode for Thomson Brook. 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 Thomson Brook 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.
Thomson Brook is a smaller community of 89 — about 2% of the Western Australia suburb median (5,605) — so investors should factor in the narrower buyer pool and longer average time-on-market. Thomson Brook's median household income of $50,232/year is 50% below the Western Australia suburb median ($99,736) — this is an affordability play where returns lean on yield and patient capital growth rather than demographic premium. Weekly rent of $200 covers just 39% of the median $2,200/month mortgage repayment, leaving a $1,333/month gap — investors should only pursue this suburb with a clear capital-growth thesis and sufficient external income to fund the shortfall. Thomson Brook is 186 km from Perth, so the local market tracks regional employment and lifestyle drivers more than CBD-driven commuter demand.
How Thomson Brook stacks up against the median of all Western Australia suburbs in our dataset. Positive values mean Thomson Brook sits above the state median; negative means below.
| Metric | Thomson Brook | WA median | Δ vs state |
|---|---|---|---|
| Population | 89 | 5,605 | -98% |
| Median household income | $50,232/yr | $99,736/yr | -50% |
| Median rent (weekly) | $200 | $350 | -43% |
| Median mortgage (monthly) | $2,200 | $1,902 | +16% |
| Distance to CBD | 186 km | 20 km | +830% |
| Separate houses | 87% | 79% | +8pp |
Pre-inspection briefing for Thomson Brook — every item is derived from public datasets, with full citations in our data sources page.
Limited buy-and-hold upside: a small population of 89 means liquidity is thin and capital growth tends to lag the wider Western Australia market over full cycles.
Weak cash flow: $200/week rent covers only 39% of the $2,200/month median mortgage — a $1,333/month gap that must be funded from other income. This suburb is a capital-growth play, not a yield play.
With 87% houses in a 89-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 Thomson Brook property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Capital-growth expectations for Thomson Brook are modest for 2026 — incomes 50% below the WA median of $99,736 and a population of 89 suggest gains will lag headline metro markets. Rental coverage runs at ~39% of the typical mortgage ($867/month rent vs $2,200/month repayment), meaning investors will rely on capital growth rather than yield. The EquitySight investment score of 24/100 places Thomson Brook in the lower tier of Australian suburbs we profile, and overall investor sentiment is cautious heading into the second half of 2026.
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Thomson Brook scores 24/100 on our EquitySight investment framework — a weak rating. That score is driven by a population of 89, median household income of $50,232/year and median weekly rent of $200. 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 Thomson Brook are a median household income of $50,232/year, a dwelling mix that is 87% 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.
Thomson Brook has a usual resident population of approximately 89, 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.
Thomson Brook sits 186 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 $200 in Thomson Brook, equating to approximately $10,400/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 Thomson Brook is $2,200, or approximately $26,400/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 $200 works out to $867/month, covering 39% of the median mortgage repayment of $2,200/month. That leaves a $1,333/month shortfall (around $15,996/year before tax benefits), so a typical owner-occupier-priced property here is negatively geared. 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 (89 residents), interest-rate sensitivity on the $2,200 median mortgage, below-median household incomes ($50,232 vs $99,736 state median), 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.