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ABS 2021 Census · Updated 21 May 2026
Sumner is a well-established middle-ring suburb of Brisbane, Australia, with a population of approximately 603, making it a boutique locality. Located approximately 14 km from the Brisbane CBD, Sumner is a middle ring area in Queensland. The median household income is $117,832 per year.
Above-average earnings in Sumner support sustained property values. Its proximity to the CBD adds a strong location premium.
Official Australia Post postcode for Sumner. 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 Sumner 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.
Sumner is a smaller community of 603 — about 11% of the Queensland suburb median (5,474) — so investors should factor in the narrower buyer pool and longer average time-on-market. Median household income of $117,832/year runs 30% above the Queensland suburb median of $90,298, indicating strong purchasing power and the type of demographic profile that tends to sustain premium property prices through market cycles. Median weekly rent of $445 equates to $1,928/month — about 107% of the median mortgage repayment of $1,800/month — meaning rental income covers most of a typical owner's repayment and this is a genuine cash-flow suburb before tax benefits. 14 km from Brisbane places Sumner in the middle commuter belt, close enough for daily trips by car or rail but at a materially lower price point than inner suburbs.
How Sumner stacks up against the median of all Queensland suburbs in our dataset. Positive values mean Sumner sits above the state median; negative means below.
| Metric | Sumner | QLD median | Δ vs state |
|---|---|---|---|
| Population | 603 | 5,474 | -89% |
| Median household income | $117,832/yr | $90,298/yr | +30% |
| Median rent (weekly) | $445 | $385 | +16% |
| Median mortgage (monthly) | $1,800 | $1,733 | +4% |
| Distance to CBD | 14 km | 62 km | -77% |
| Separate houses | 86% | 77% | +9pp |
Pre-inspection briefing for Sumner — every item is derived from public datasets, with full citations in our data sources page.
Strong buy-and-hold fundamentals: household incomes run 30% above the Queensland suburb median ($117,832 vs $90,298), and the 14 km CBD distance keeps this suburb in the primary demand zone. In Queensland, suburbs with this profile have historically clustered in the upper tercile of 10-year capital growth.
Strong rental coverage: $445/week (~$1,928/month) covers 107% of the $1,800/month median mortgage repayment, so the shortfall sits at just $0/month. Investors targeting positive cash flow should shortlist this suburb.
With 86% houses in a 603-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 Sumner property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Sumner enters 2026 with a demographic tailwind — household incomes 30% above the Queensland suburb median of $90,298 and a population of 603 give it the depth and purchasing power to outperform the wider QLD market over the next 12–18 months. Rental coverage runs at ~107% of the typical mortgage ($1,928/month rent vs $1,800/month repayment), keeping cash flow in positive or near-neutral territory. The EquitySight investment score of 70/100 places Sumner in the upper-middle tier of Australian suburbs we profile, and overall investor sentiment is constructive heading into the second half of 2026.
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Sumner scores 70/100 on our EquitySight investment framework — a good rating. That score is driven by a population of 603, median household income of $117,832/year and median weekly rent of $445. 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 Sumner are proximity to Brisbane (14 km), an above-state-median household income of $117,832/year, a dwelling mix that is 86% 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.
Sumner has a usual resident population of approximately 603, compared with a Queensland suburb median of 5,474 — 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.
Sumner sits 14 km straight-line from the Brisbane CBD. This is comfortable commuter territory, with reasonable rail and road access to the city.
The most recent census recorded a median weekly rent of $445 in Sumner, equating to approximately $23,140/year in gross rental income (state median $385/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 Sumner is $1,800, or approximately $21,600/year (vs $1,733/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 $445 works out to $1,928/month, covering 107% of the median mortgage repayment of $1,800/month. That means rent exceeds the median repayment by roughly $128/month, so on these numbers Sumner 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 (603 residents), interest-rate sensitivity on the $1,800 median mortgage, the broader Queensland 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.