Tanah Merah flood map & planning overlays
A planning-constraint profile of Tanah Merah (Logan City, QLD) - 4.04 km², mapped from live council and state overlay data. This suburb is highly constrained.
Everything below is suburb-wide. Overlays change block to block - see which ones actually touch your lot. The map is free.
Constraint readout
4.04 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Tanah Merah's boundary, with the flood, bushfire and environmental overlays drawn on top. It shows where constraints fall; the interactive map shows them on your exact address.
Tanah Merah flood risk at the property level
Overlay percentages say how much land is constrained; these figures say how many properties are actually touched, from our lot-by-lot analysis of 2,129 Tanah Merah properties.
Lot-level readout
Flood-risk rating across all 2,129 properties
From LayeredGeo's lot-risk engine: council flood overlays, historical flooding and terrain, resolved to each individual lot in Tanah Merah.
Tanah Merah at a glance
How Tanah Merah is zoned
Selling in Tanah Merah? 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 4.04 km², Tanah Merah is highly constrained by planning overlays. About 51% of the suburb sits within a mapped flood overlay, and 32% is flagged bushfire-prone. The dominant land-use zone is Low Density Residential. The terrain is gently undulating, and the median lot measures about 800 m² across 1,961 parcels. These figures are suburb-wide - the overlays that actually apply to a given lot can differ block to block, which is what a property-level check tells you.
Who lives in Tanah Merah
Census 2021 figures published by the ABS for the Tanah Merah 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 986, and decile 7 within Queensland. The national average is 1000.
Age profile
Share of Tanah Merah's 4,754 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Loganholme - Tanah Merah, the wider ABS statistical area containing Tanah Merah. There is no annual population series published at suburb level, so this describes the surrounding area rather than Tanah Merah itself.
9,651 in 2001 to 12,700 in 2025, up 32%.
Source: Australian Bureau of Statistics. Census of Population and Housing 2021 (General Community Profile) and SEIFA 2021, both published at the Suburbs and Localities level; Regional Population (estimated resident population) at Statistical Area Level 2. Used under CC BY 4.0. Census counts of small populations are randomly adjusted by the ABS to protect confidentiality, so figures for small suburbs are indicative.
Check a specific Tanah Merah 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 →Tanah Merah planning - frequently asked
Where can I see a flood map of Tanah Merah?
The schematic on this page is a Tanah Merah flood map: the mapped flood overlays drawn over the suburb's terrain and street grid, covering about 51% of the suburb. Flood lines vary block to block, so for a specific property use the free interactive map - search any Tanah Merah address and it shows the flood, zoning and bushfire mapping on the exact lot boundary.
Is Tanah Merah flood-prone?
About 51% of Tanah Merah falls within a mapped flood overlay, against a Logan City average of 51%. Looking lot by lot, 39% of the 2,129 properties we analysed in Tanah Merah carry some level of mapped flood risk, including 74 rated high risk or historically affected. Flood overlays vary block to block, so whether a particular lot is affected needs a property-level check.
Is Tanah Merah bushfire-prone?
Yes - around 32% of Tanah Merah is mapped as bushfire-prone, compared with a Logan City average of 54%. A bushfire-prone designation can trigger additional building requirements, so check the specific address.
What is the zoning in Tanah Merah?
The dominant planning zone in Tanah Merah is Low Density Residential, though the suburb also includes Rural and Recreation and Open Space. Zoning sets what you can build and do on a site, and can differ lot by lot.
Does Tanah Merah have heritage-listed places?
No heritage-listed places are on record within Tanah Merah. Even so, it is worth confirming for an individual property before any works.
Is Tanah Merah hilly or flat?
Tanah Merah is gently undulating: the median lot slope is about 7%, and 18% of properties sit on slopes of 15% or steeper. Ground level runs from roughly 11 m to 73 m AHD across the suburb. Slope drives site costs - cut and fill, retaining walls and driveway grades - so it is worth knowing before you commit to a sloping block.
What is the typical lot size in Tanah Merah?
Across 1,961 surveyed parcels in Tanah Merah, the median lot size is about 800 m². There are also 284 registered easements mapped in the suburb - an easement can restrict where you can build, so always check the title and overlays for the specific lot.
Does Tanah Merah have a train station?
There is no train station inside Tanah Merah itself. The suburb is served by 10 bus stops.
What is the population of Tanah Merah?
At the 2021 Census Tanah Merah had 4,754 usual residents, with a median age of 37 and an average household size of 2.8 people. The wider Loganholme - Tanah Merah statistical area, which contains Tanah Merah, went from 9,651 people in 2001 to 12,700 in 2025, up 32%. ABS publishes no annual population series for individual suburbs, so that trend describes the surrounding area rather than Tanah Merah alone.
Is Tanah Merah an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Tanah Merah scores 986 and sits in decile 5 of 10 nationally and decile 7 within Queensland - decile 1 being the most disadvantaged tenth of Australian suburbs and decile 10 the least. The national average score is 1000. SEIFA summarises income, education, occupation and housing across the whole suburb, so it describes the area, not any particular household in it.
What is the median household income in Tanah Merah?
Median household income in Tanah Merah was $1,899 a week at the 2021 Census, against $1,924 for the typical suburb in Logan City. Median rent was $380 a week and the median mortgage repayment $1,733 a month. These are 2021 Census figures and have not been indexed to today.
Do I need a planning report for a Tanah Merah property?
A Tanah Merah planning report pulls every overlay - zoning, flood, bushfire, heritage and environmental - that touches a single lot, on live council and state data. The interactive map preview is free; a full PDF report is $9.