Glen Cairn flood map & planning overlays
Rents at Glen Cairn reach $500 a week, 3rd in Lockyer Valley Regional.
Most lots here are flood-mapped. The free check shows how much of one lot the overlay covers.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
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.
Profile updated 7 November 2026.
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. 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 Glen Cairn
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.
Glen Cairn at a glance
Schools in and near Glen Cairn
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
0 schools providing primary years and 0 providing secondary years. A combined school may be counted in both teaching levels.
Nearest school availability
Primary: 1.99 km from the suburb boundary
Secondary: 4.71 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 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 57% 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 125,056 m² across 91 parcels.
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: ABS Census 2021 and SEIFA 2021 (Suburbs and Localities), Regional Population (SA2), CC BY 4.0. Small counts are randomly adjusted by the ABS.
Glen Cairn 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 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 →Aircraft have been seen below 3,000 ft over about 15% of Glen Cairn. 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 Glen Cairn. 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 Glen Cairn lot.
Glen Cairn planning - frequently asked
Is Glen Cairn flood-prone?
About 57% of Glen Cairn falls within a mapped flood overlay, against the council-wide suburb average of 29%. Published flood models are held over parts of Glen Cairn; the free check on the Flood Model Report page says whether one reaches a given address.
Is Glen Cairn bushfire-prone?
Around 54% of Glen Cairn is mapped as bushfire-prone, compared with a Lockyer Valley Regional average of 61%.
Is Glen Cairn under a flight path?
Aircraft were observed below 3,000 ft over about 15% of Glen Cairn, and over about 60% 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 4,500 ft. At the busiest point in the suburb about 0 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 Glen Cairn?
The dominant planning zone in Glen Cairn is Rural, though the suburb also includes Conservation and Rural Residential.
Does Glen Cairn have heritage-listed places?
No heritage-listed places are on record within Glen Cairn.
What is the typical lot size in Glen Cairn?
Across 91 surveyed parcels in Glen Cairn, the median lot size is about 125,056 m². There are also 7 registered easements mapped in the suburb.
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%.
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 is the most disadvantaged tenth, decile 10 the least).
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.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Laidley Heights | 3.9 km | 33% | 40% |
| Woodlands | 4.3 km | 17% | 74% |
| Forest Hill | 4.6 km | 78% | 23% |
| Blenheim | 5.3 km | 14% | 30% |
| Lawes | 5.3 km | 86% | 16% |
| Laidley Creek West | 6.7 km | 23% | 42% |
| Laidley North | 7.2 km | 57% | 36% |
| Gatton | 7.3 km | 68% | 32% |
| College View | 7.3 km | 100% | 4% |
| Ropeley | 8.1 km | Not mapped | 37% |