The numbers, in plain English
To rent in Thornlie without housing stress, a household income of about $104,000/year keeps the rent of $600/week at or below 30% of gross income, the standard affordability benchmark. That rent is our modelled median (no bond data published for Thornlie yet). Check your income →
To buy the median home ($710,000) with a 20% deposit of $142k, repayments at 6.85% over 30 years come to about $3,722/month: comfortable on roughly $149,000/year under the same 30% rule. Saving that deposit at $1,500/month takes about 7.9 years, before stamp duty of $28k ($18k for eligible first home buyers). Run your own loan →
That price is an estimate, and probably too low. No government publishes open sale prices for Western Australia, so we model it from distance, population and income. Checked against real sales, the model runs about 40% under. Treat this figure, and the deposit and repayments built on it, as a rough scale, not a number to plan around. How we're fixing this →
Compared to the rest of Western Australia, Thornlie is more expensive to buy than 90% of the state's suburbs (state median $330k) and pricier to rent than 77% (state median $441/week). It sits roughly 15 km from the Perth CBD as the crow flies.
For investors, the median rent against the median price gives a gross rental yield of about 4.4% before costs. Net yield calculator →
Modelled medians, not valuations. Every formula above is documented on our methodology page.
Affordability by income
$60k income
Rent ($600/wk)
Over budget
Budget: $346/wk
Buy ($710k)
Repayments are a stretch
$3,722/mo · deposit in ~15.8yr
$90k income
Rent ($600/wk)
Over budget
Budget: $519/wk
Buy ($710k)
Repayments are a stretch
$3,722/mo · deposit in ~10.6yr
$120k income
Rent ($600/wk)
Affordable
Budget: $692/wk
Buy ($710k)
Repayments are a stretch
$3,722/mo · deposit in ~7.9yr
Based on 30% gross income rule for rent; 6.85% p.a. / 30-year P&I loan at 20% deposit for purchase; 15% savings rate for deposit timeline.
Upfront buying costs
| Purchase price | $710k |
| 20% deposit (no LMI) | $142k |
| Stamp duty (Western Australia) | $28k |
| Stamp duty (first home buyer) | $18k |
| Conveyancing (est.) | $1,500 – $3,000 |
| Building inspection (est.) | $400 – $700 |
| Total upfront (est.) | $172k |
Who lives here & what's nearby
Real figures for Thornlie. Measured, not modelled.
How Thornlie compares
- Younger than average, a median age of 38 vs 43 statewide.
Demographics and tenure from the ABS 2021 Census; the socio-economic score is the ABS SEIFA 2021 index of relative disadvantage, scaled 0–100 against every Australian postcode; distances and school counts from OpenStreetMap. Comparisons are against the median suburb in Western Australia. Suburb-level price trends aren't shown because no open source publishes them reliably yet, see our data sources.
What's around Thornlie
Parks, markets, sport, libraries and community places nearby.
- Ailsworth Court Reserve400 m
- Osprey Reserve500 m
- Fagence Way Reserve600 m
- Grainger Reserve700 m
- Food Hall1.8 km
- Gosnells City Football CLub400 m
- Thornlie Football and Sports Club400 m
- Gosnells Leisure World1.2 km
- Castle Glen Tennis Pavilion1.3 km
- Thornlie Library1.2 km
- Crestwood Community Centre800 m
- Forest Lakes Thornlie Family Centre1.0 km
- Thornlie Community Centre1.7 km
- Richard Rushton Community Centre2.6 km
Places within about 3 km, from OpenStreetMap contributors, with distances as the crow flies. Something missing or moved? Tell us.
Get to know Thornlie
Video tours, maps and community groups for Thornlie.
Neighbourhood scores
Indicative scores based on ABS Census data modelling. Always conduct your own research.
Related reading
Government schemes that may apply
5% Deposit Scheme
Buy with a 5% deposit and no LMI. No income test and no limit on places since 1 October 2025; price caps vary by area.
Learn more →First home owner grant
$10,000 towards a new home valued up to $800,000, for eligible first home buyers.
Learn more →First Home Super Saver (FHSS)
Save up to $50k inside super (taxed at 15% instead of marginal rate), then withdraw for a deposit.
Learn more →Stamp duty concessions
On Thornlie's median of $710,000, a WA first home buyer pays about $17,765 instead of $27,740, roughly $9,975 less.
That median is modelled, not observed, and our modelled prices run low. Treat the duty figure as indicative.
Learn more →So what now?
The questions these numbers usually raise, and where to get each one answered.
Could I borrow $568k?
Run your income and debts through the same serviceability rules the banks use.
Free calculatorWhat would repayments be on $710k?
Monthly, fortnightly and weekly, with the full amortisation schedule.
Free calculatorAm I better off renting at $600/week?
Compare the total cost of both paths in Thornlie over time.
Free calculatorGetting the place inspected
A licensed inspector checks for structural and pest problems before you exchange contracts.
Someone to handle the legal side
A conveyancer reviews the contract, runs the title searches and manages settlement.
We do not rank these or say which is best: that would be advice, and we are not licensed to give it. Where a link pays us it says so beside the link, and it never changes what we show or the order we show it in. Our methodology explains every figure above.
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Rent data for Thornlie sourced from the ABS 2021 Census, scaled by rental CPI to current values. Calculations use 30% gross income rule, 20% deposit, 6.85% p.a. loan rate over 30 years. Not financial advice.
General Advice Warning
The information on this site is general in nature and does not consider your personal circumstances, financial situation, or needs. Before acting on any information, you should consider its appropriateness having regard to your own situation and seek professional advice from a licensed financial adviser, mortgage broker, accountant, or solicitor.