Glen Cairn flood map & planning overlays
A planning-constraint profile of Glen Cairn (Lockyer Valley Regional, QLD) - 14.9 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
14.9 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Glen Cairn'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.
Glen Cairn at a glance
How Glen Cairn is zoned
Selling in Glen Cairn? 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 14.9 km², Glen Cairn is highly constrained by planning overlays. About 42% of the suburb sits within a mapped flood overlay, and 54% is flagged bushfire-prone. The dominant land-use zone is Rural. The median lot measures about 121,331 m² across 94 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 Glen Cairn
Census 2021 figures published by the ABS for the Glen Cairn 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 979, and decile 6 within Queensland. The national average is 1000.
Age profile
Share of Glen Cairn's 141 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Lockyer Valley - East, the wider ABS statistical area containing Glen Cairn. There is no annual population series published at suburb level, so this describes the surrounding area rather than Glen Cairn itself.
13,192 in 2001 to 24,138 in 2025, up 83%.
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 Glen Cairn 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 →Glen Cairn planning - frequently asked
Where can I see a flood map of Glen Cairn?
The schematic on this page is a Glen Cairn flood map: the mapped flood overlays drawn over the suburb's terrain and street grid, covering about 42% of the suburb. Flood lines vary block to block, so for a specific property use the free interactive map - search any Glen Cairn address and it shows the flood, zoning and bushfire mapping on the exact lot boundary.
Is Glen Cairn flood-prone?
About 42% of Glen Cairn falls within a mapped flood overlay, against a Lockyer Valley Regional average of 20%. Flood overlays vary block to block, so whether a particular lot is affected needs a property-level check.
Is Glen Cairn bushfire-prone?
Yes - around 54% of Glen Cairn is mapped as bushfire-prone, compared with a Lockyer Valley Regional average of 63%. A bushfire-prone designation can trigger additional building requirements, so check the specific address.
What is the zoning in Glen Cairn?
The dominant planning zone in Glen Cairn is Rural, though the suburb also includes Conservation and Rural Residential. Zoning sets what you can build and do on a site, and can differ lot by lot.
Does Glen Cairn have heritage-listed places?
No heritage-listed places are on record within Glen Cairn. Even so, it is worth confirming for an individual property before any works.
What is the typical lot size in Glen Cairn?
Across 94 surveyed parcels in Glen Cairn, the median lot size is about 121,331 m². There are also 7 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 Glen Cairn?
At the 2021 Census Glen Cairn had 141 usual residents, with a median age of 38 and an average household size of 3.1 people. The wider Lockyer Valley - East statistical area, which contains Glen Cairn, went from 13,192 people in 2001 to 24,138 in 2025, up 83%. ABS publishes no annual population series for individual suburbs, so that trend describes the surrounding area rather than Glen Cairn alone.
Is Glen Cairn an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Glen Cairn scores 979 and sits in decile 5 of 10 nationally and decile 6 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 Glen Cairn?
Median household income in Glen Cairn was $1,583 a week at the 2021 Census, against $1,521 for the typical suburb in Lockyer Valley Regional. Median rent was $500 a week and the median mortgage repayment $1,534 a month. These are 2021 Census figures and have not been indexed to today.
Do I need a planning report for a Glen Cairn property?
A Glen Cairn 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.