Blenheim flood map & planning overlays
Light overlays for the valley: Blenheim is 14% flood- and 30.4% bushfire-mapped.
Things you won't regret: spending $9 to know the lot before you commit.
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A planning-constraint profile of Blenheim
(Lockyer Valley Regional, QLD) - 36.91 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 7 November 2026.
Constraint readout
36.91 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Blenheim's boundary, with the flood, bushfire and environmental overlays drawn on top. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Blenheim
The ANEF contour is a published planning forecast and observed overflight is what a sampled tracking feed recorded - neither describes any individual property.
Observed overflight - sampled 4 Sep to 7 Nov 2026
typical observed square 0 a day
Night movements: observed, lowest 2,500 ft - night is sampled as often as day, but night traffic is light, so this is a floor and no rate can be put on it.
How this is measured
Traffic is sampled rather than watched continuously, so every figure is a floor: aircraft not captured between samples are not represented. Rates are per 500 m square - the busiest square in the suburb, not a count of flights over the suburb - and a square is only rated where enough traffic was seen to measure it. Altitudes are above mean sea level. Flight paths change with runway use, weather, season and airspace design. This is a record of observed traffic; it is not a noise contour and not a planning control.
Blenheim at a glance
Schools in and near Blenheim
Public school-location data shows availability across the suburb; it does not rate schools or assign any individual address to a catchment.
Inside the suburb boundary
1 school providing primary years and 0 providing secondary years. A combined school may be counted in both teaching levels.
Nearest school availability
Primary: inside the suburb
Secondary: 5.51 km from the suburb boundary
Source: Queensland Government school geographic information. Catchment boundaries can divide a suburb and change over time.
Which school zone is a Blenheim address in? Check an address with our free school zone checker.
How Blenheim is zoned
Selling in Blenheim? The lot-level zone is the zoning Part 3 of Queensland's Form 2 seller disclosure statement asks for - see our Form 2 planning data guide.
Across its 36.91 km², Blenheim is highly constrained by planning overlays. About 14% of the suburb sits within a mapped flood overlay, and 30% is flagged bushfire-prone. There are 2 heritage-listed sites on record, and the dominant land-use zone is Rural. The median lot measures about 156,960 m² across 197 parcels.
Who lives in Blenheim
Census 2021 figures published by the ABS for the Blenheim suburb boundary itself, not a wider region.
Socio-economic standing
ABS SEIFA 2021 ranks every Australian suburb. Decile 1 is the most disadvantaged tenth of the country, decile 10 the least.
Score 943, and decile 4 within Queensland. The national average is 1000.
Age profile
Share of Blenheim's 264 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Lockyer Valley - East, the wider ABS statistical area containing Blenheim. There is no annual population series published at suburb level, so this describes the surrounding area rather than Blenheim itself.
13,192 in 2001 to 24,138 in 2025, up 83%.
Source: ABS Census 2021 and SEIFA 2021 (Suburbs and Localities), Regional Population (SA2), CC BY 4.0. Small counts are randomly adjusted by the ABS.
Blenheim data sources and coverage
“Not mapped” means we hold no source layer for this suburb - never an all-clear.
| Dataset | Coverage | Publisher |
|---|---|---|
| Flood mapping | Mapped | the relevant council planning scheme and Queensland Government spatial data |
| Bushfire-prone mapping | Mapped | the relevant council planning scheme and Queensland Government spatial data |
| Zoning | Mapped | the relevant council planning scheme and Queensland Government spatial data |
| Heritage and environment | Mapped where published | the relevant council planning scheme and Queensland Government spatial data |
| Aircraft noise contours (ANEF) | Not held | the relevant council planning scheme and Queensland Government spatial data, Defence |
| Observed flight paths | Observed | adsb.lol, under the Open Database License |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
| School availability | Available | Queensland Government |
Profile last materially updated 7 November 2026. See the methodology and full source list. Source data changes over time and critical decisions should be checked with the responsible authority.
Check a specific Blenheim address
See exactly which overlays touch a single property - the interactive map is free. Need it on paper? A full planning PDF is just $9.
See what's in the $9 report →Aircraft have been seen below 3,000 ft over about 32% of Blenheim. The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Published flood models are held over parts of Blenheim. The free check tells you whether one reaches an address; where it does, a Flood Model Report is +$9 with the planning report.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and the indicative soil reactivity range to expect for a Blenheim lot.
Blenheim planning - frequently asked
Is Blenheim flood-prone?
About 14% of Blenheim falls within a mapped flood overlay, against the council-wide suburb average of 29%. Published flood models are held over parts of Blenheim; the free check on the Flood Model Report page says whether one reaches a given address.
Is Blenheim bushfire-prone?
Around 30% of Blenheim is mapped as bushfire-prone, compared with a Lockyer Valley Regional average of 61%.
Is Blenheim under a flight path?
Aircraft were observed below 3,000 ft over about 32% of Blenheim, and over about 80% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 7 Nov 2026). The lowest measured aircraft was at 2,000 ft, with an average of 4,000 ft. At the busiest point in the suburb about 1 aircraft a day were recorded passing over one 500 m square. Traffic is sampled rather than watched continuously and flight paths change with runway use, weather and season; the ANEF contour is the planning instrument.
What is the zoning in Blenheim?
The dominant planning zone in Blenheim is Rural, though the suburb also includes Community Facilities and Conservation.
Does Blenheim have heritage-listed places?
Blenheim has 2 heritage-listed places on record.
What is the typical lot size in Blenheim?
Across 197 surveyed parcels in Blenheim, the median lot size is about 156,960 m². There are also 48 registered easements mapped in the suburb.
What is the population of Blenheim?
At the 2021 Census Blenheim had 264 usual residents, with a median age of 45 and an average household size of 2.6 people. The wider Lockyer Valley - East statistical area, which contains Blenheim, went from 13,192 people in 2001 to 24,138 in 2025, up 83%.
Is Blenheim an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Blenheim scores 943 and sits in decile 3 of 10 nationally and decile 4 within Queensland (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Blenheim?
Median household income in Blenheim was $1,478 a week at the 2021 Census, against $1,521 for the typical suburb in Lockyer Valley Regional. Median rent was $330 a week and the median mortgage repayment $1,582 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Laidley Creek West | 3.6 km | 23% | 42% |
| Ropeley | 5.1 km | Not mapped | 37% |
| Glen Cairn | 5.3 km | 57% | 54% |
| Laidley Heights | 5.8 km | 33% | 40% |
| Woodlands | 6.0 km | 17% | 74% |
| Rockside | 6.3 km | Not mapped | 68% |
| Laidley South | 6.7 km | 56% | 52% |
| Mount Berryman | 6.9 km | 3% | 72% |
| Mulgowie | 9.1 km | 22% | 73% |
| Upper Tenthill | 9.5 km | 29% | 29% |