Birnam flood map & planning overlays
A planning-constraint profile of Birnam (Scenic Rim Regional, QLD) - 20.88 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
20.88 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Birnam'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.
How common is mapped flood risk across Birnam properties?
Overlay percentages say how much land is constrained; these figures say how many properties are actually touched in a suburb-wide analysis of 55 Birnam properties. No individual property result is identified on this page.
Lot-level readout
Flood-risk rating across all 55 properties
From LayeredGeo's lot-risk engine: council flood overlays, historical flooding and terrain, resolved to each individual lot in Birnam.
Birnam flood history and overland flow
These are suburb-wide totals across 55 analysed properties. They show how common each mapped category is across Birnam; they do not identify or describe any individual property.
Recorded historical flood mapping
32 analysed properties intersect at least one mapped historical event extent.
- Defined Flood Event: 32
Source: Scenic Rim Regional Council flood mapping, aggregated by LayeredGeo. Categories are only shown where at least five analysed properties share them. An address-level check is still required to determine whether a particular lot is mapped.
Birnam at a glance
Schools in and near Birnam
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
0 schools providing primary years and 0 providing secondary years. A combined school may be counted in both teaching levels.
Nearest school availability
Primary: 2.16 km from the suburb boundary
Secondary: 3.45 km from the suburb boundary
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 Birnam is zoned
Selling in Birnam? 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 20.88 km², Birnam is highly constrained by planning overlays. About 18% of the suburb sits within a mapped flood overlay, and 59% is flagged bushfire-prone. The dominant land-use zone is Rural. The terrain is gently undulating, and the median lot measures about 157,611 m² across 62 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 Birnam
Census 2021 figures published by the ABS for the Birnam 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 988, and decile 7 within Queensland. The national average is 1000.
Age profile
Share of Birnam's 109 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Beaudesert, the wider ABS statistical area containing Birnam. There is no annual population series published at suburb level, so this describes the surrounding area rather than Birnam itself.
9,977 in 2001 to 16,642 in 2025, up 67%.
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.
Birnam data sources and coverage
Every figure below is an aggregate for the suburb boundary. “Not mapped” means LayeredGeo does not hold a source layer covering this suburb; it is never an all-clear for a particular property.
| 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 |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
| School availability | Available | Queensland Government |
Profile last materially updated 5 August 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 Birnam 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 →Birnam planning - frequently asked
Where can I see a flood map of Birnam?
The schematic on this page is a Birnam flood map: the mapped flood overlays drawn over the suburb's terrain and street grid, covering about 18% of the suburb. Flood lines vary block to block, so for a specific property use the free interactive map - search any Birnam address and it shows the flood, zoning and bushfire mapping on the exact lot boundary.
Is Birnam flood-prone?
About 18% of Birnam falls within a mapped flood overlay, against the council-wide suburb average of 19%. Across the suburb, 58% of the 55 properties we analysed carry some level of mapped flood risk, including 28 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 Birnam bushfire-prone?
Yes - around 59% of Birnam is mapped as bushfire-prone, compared with a Scenic Rim Regional average of 52%. A bushfire-prone designation can trigger additional building requirements, so check the specific address.
What is the zoning in Birnam?
The dominant planning zone in Birnam is Rural, though the suburb also includes Recreation and Open Space and Community Facilities. Zoning sets what you can build and do on a site, and can differ lot by lot.
Does Birnam have heritage-listed places?
No heritage-listed places are on record within Birnam. Even so, it is worth confirming for an individual property before any works.
Is Birnam hilly or flat?
Birnam is gently undulating: the median lot slope is about 8%, and 18% of properties sit on slopes of 15% or steeper. Ground level runs from roughly 54 m to 153 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 Birnam?
Across 62 surveyed parcels in Birnam, the median lot size is about 157,611 m². There are also 13 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.
What is the population of Birnam?
At the 2021 Census Birnam had 109 usual residents, with a median age of 44 and an average household size of 2.9 people. The wider Beaudesert statistical area, which contains Birnam, went from 9,977 people in 2001 to 16,642 in 2025, up 67%. ABS publishes no annual population series for individual suburbs, so that trend describes the surrounding area rather than Birnam alone.
Is Birnam an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Birnam scores 988 and sits in decile 6 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 Birnam?
Median household income in Birnam was $2,107 a week at the 2021 Census, against $1,562 for the typical suburb in Scenic Rim Regional. Median rent was $490 a week and the median mortgage repayment $2,134 a month. These are 2021 Census figures and have not been indexed to today.
Do I need a planning report for a Birnam property?
A Birnam 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.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Veresdale Scrub | 4.6 km | 27% | 36% |
| Tabragalba | 4.8 km | 28% | 40% |
| Veresdale | 5.9 km | 46% | 26% |
| Mundoolun Logan City |
6.2 km | 31% | 81% |
| Boyland | 6.9 km | 24% | 55% |
| Veresdale Scrub Logan City |
7.0 km | 24% | 42% |
| Beaudesert | 7.2 km | 36% | 41% |
| Biddaddaba | 7.3 km | 9% | 74% |
| Cedar Vale Logan City |
8.9 km | 24% | 69% |
| Veresdale Logan City |
9.2 km | 65% | 28% |