Plainby flood map & planning overlays
A planning-constraint profile of Plainby (Toowoomba Regional, QLD) - 38.08 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
38.08 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Plainby'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.
Plainby 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 82 Plainby properties.
Lot-level readout
Flood-risk rating across all 82 properties
From LayeredGeo's lot-risk engine: council flood overlays, historical flooding and terrain, resolved to each individual lot in Plainby.
Plainby at a glance
How Plainby is zoned
Selling in Plainby? 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 38.08 km², Plainby is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 26% is flagged bushfire-prone. The dominant land-use zone is Rural. The terrain is gently undulating, and the median lot measures about 381,798 m² across 91 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 Plainby
Census 2021 figures published by the ABS for the Plainby 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 965, and decile 5 within Queensland. The national average is 1000.
Age profile
Share of Plainby's 56 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Crows Nest - Rosalie, the wider ABS statistical area containing Plainby. There is no annual population series published at suburb level, so this describes the surrounding area rather than Plainby itself.
7,766 in 2001 to 9,824 in 2025, up 27%.
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 Plainby 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 →Plainby planning - frequently asked
Where can I see a flood map of Plainby?
The schematic on this page is a Plainby flood map: the mapped flood overlays drawn over the suburb's terrain and street grid. Flood lines vary block to block, so for a specific property use the free interactive map - search any Plainby address and it shows the flood, zoning and bushfire mapping on the exact lot boundary.
Is Plainby flood-prone?
Flood mapping covers Plainby and none of the suburb falls within a mapped flood overlay (the Toowoomba Regional average is 13%). Looking lot by lot, 0% of the 82 properties we analysed in Plainby carry some level of mapped flood risk. Flood overlays vary block to block, so whether a particular lot is affected needs a property-level check.
Is Plainby bushfire-prone?
Yes - around 26% of Plainby is mapped as bushfire-prone, compared with a Toowoomba Regional average of 20%. A bushfire-prone designation can trigger additional building requirements, so check the specific address.
What is the zoning in Plainby?
The dominant planning zone in Plainby is Rural. Zoning sets what you can build and do on a site, and can differ lot by lot.
Does Plainby have heritage-listed places?
No heritage-listed places are on record within Plainby. Even so, it is worth confirming for an individual property before any works.
Is Plainby hilly or flat?
Plainby is gently undulating: the median lot slope is about 8%, and 26% of properties sit on slopes of 15% or steeper. Ground level runs from roughly 539 m to 744 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 Plainby?
Across 91 surveyed parcels in Plainby, the median lot size is about 381,798 m².
What is the population of Plainby?
At the 2021 Census Plainby had 56 usual residents, with a median age of 48 and an average household size of 2.3 people. The wider Crows Nest - Rosalie statistical area, which contains Plainby, went from 7,766 people in 2001 to 9,824 in 2025, up 27%. ABS publishes no annual population series for individual suburbs, so that trend describes the surrounding area rather than Plainby alone.
Is Plainby an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Plainby scores 965 and sits in decile 4 of 10 nationally and decile 5 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 Plainby?
Median household income in Plainby was $1,249 a week at the 2021 Census, against $1,583 for the typical suburb in Toowoomba Regional. Median rent was $280 a week and the median mortgage repayment $2,167 a month. These are 2021 Census figures and have not been indexed to today.
Do I need a planning report for a Plainby property?
A Plainby 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.