Thornlands flood map & planning overlays
A planning-constraint profile of Thornlands
(Redland City, QLD) - 21.95 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 19 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
21.95 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Thornlands's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
How common is mapped flood risk across Thornlands properties?
Overlay percentages say how much land is constrained; these figures say how many properties are actually touched in a suburb-wide analysis of 7,526 Thornlands properties. No individual property result is identified on this page.
Lot-level readout
Flood-risk rating across all 7,526 properties
From LayeredGeo's lot-risk engine: council flood overlays, historical flooding and terrain, resolved to each individual lot in Thornlands.
Thornlands at a glance
Schools in and near Thornlands
Public school-location data shows availability across the suburb. These figures do not rate schools and do not assign a particular address to a catchment.
Inside the suburb boundary
3 schools providing primary years and 2 providing secondary years. A combined school may be counted in both teaching levels.
Nearest school availability
Primary: inside the suburb
Secondary: inside the suburb
Source: Queensland Government school geographic information. Catchment boundaries can divide a suburb and change over time; use the official catchment finder for a specific address.
How Thornlands is zoned
Selling in Thornlands? 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 21.95 km², Thornlands is highly constrained by planning overlays. About 22% of the suburb sits within a mapped flood overlay, and 50% is flagged bushfire-prone. There are 2 heritage-listed sites on record, and the dominant land-use zone is Low Density Residential. The terrain is largely flat, and the median lot measures about 650 m² across 7,454 parcels.
Who lives in Thornlands
Census 2021 figures published by the ABS for the Thornlands 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 1047, and decile 9 within Queensland. The national average is 1000.
Age profile
Share of Thornlands's 19,263 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Thornlands, the wider ABS statistical area containing Thornlands. There is no annual population series published at suburb level, so this describes the surrounding area rather than Thornlands itself.
7,544 in 2001 to 21,863 in 2025, up 190%.
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.
Thornlands property market snapshot
Queensland Government publishes this as a SA2 market series for Thornlands, the wider statistical area containing Thornlands. It is not a valuation and is not specific to this suburb or any individual property.
House sales
Median sale price from 332 sales over 12 months to March 2026.
Unit sales
Median sale price from 137 sales over 12 months to March 2026.
Source: Queensland Government Statistician's Office (QGSO). View the source profile. The same SA2 figure can appear on several suburb pages within that statistical area.
Thornlands 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 |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
| School availability | Available | Queensland Government |
| Market statistics | Available at SA2 level | Queensland Government Statistician's Office (QGSO) |
Profile last materially updated 19 September 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 Thornlands 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.
Published flood models are held over parts of Thornlands. The free check tells you whether one reaches an address; where it does, a Flood Model Report is +$9 with the planning report.
The Terrain Report shows the fall of the block - contours, cross sections and a 3D model of the lot (+$9 with the planning report).
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Thornlands lot.
See what's in the $9 report →Thornlands planning - frequently asked
Is Thornlands flood-prone?
About 22% of Thornlands falls within a mapped flood overlay, against the council-wide suburb average of 27%. Across the suburb, 8% of the 7,526 properties we analysed carry some level of mapped flood risk, including 50 rated high risk or historically affected.
Is Thornlands bushfire-prone?
Around 50% of Thornlands is mapped as bushfire-prone, compared with a Redland City average of 41%.
What is the zoning in Thornlands?
The dominant planning zone in Thornlands is Low Density Residential, though the suburb also includes Rural and Recreation and Open Space.
Does Thornlands have heritage-listed places?
Thornlands has 2 heritage-listed places on record.
Is Thornlands hilly or flat?
Thornlands is largely flat: the median ground slope is about 3%. Ground level runs from roughly 5 m to 64 m AHD across the suburb.
What is the typical lot size in Thornlands?
Across 7,454 surveyed parcels in Thornlands, the median lot size is about 650 m². There are also 750 registered easements mapped in the suburb.
Does Thornlands have a train station?
There is no train station inside Thornlands itself. The suburb is served by 71 bus stops.
What is the population of Thornlands?
At the 2021 Census Thornlands had 19,263 usual residents, with a median age of 36 and an average household size of 2.9 people. The wider Thornlands statistical area, which contains Thornlands, went from 7,544 people in 2001 to 21,863 in 2025, up 190%.
Is Thornlands an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Thornlands scores 1047 and sits in decile 9 of 10 nationally and decile 9 within Queensland (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Thornlands?
Median household income in Thornlands was $2,218 a week at the 2021 Census, against $1,488 for the typical suburb in Redland City. Median rent was $470 a week and the median mortgage repayment $2,167 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Victoria Point | 4.2 km | 30% | 28% |
| Cleveland | 4.7 km | 33% | 14% |
| Alexandra Hills | 4.7 km | 6% | 50% |
| Sheldon | 6.1 km | 15% | 97% |
| Coochiemudlo Island | 6.6 km | 31% | 20% |
| Ormiston | 6.9 km | 32% | 18% |
| Mount Cotton | 7.2 km | 20% | 93% |
| Capalaba | 7.4 km | 13% | 50% |
| Moreton Bay | 8.8 km | 9% | <1% |
| Redland Bay | 9.5 km | 25% | 71% |