Twin Waters flood map & planning overlays
A planning-constraint profile of Twin Waters (Sunshine Coast Regional, QLD) - 5.94 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
5.94 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Twin Waters'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.
Twin Waters 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 1,447 Twin Waters properties.
Lot-level readout
Flood-risk rating across all 1,447 properties
From LayeredGeo's lot-risk engine: council flood overlays, historical flooding and terrain, resolved to each individual lot in Twin Waters.
Twin Waters at a glance
How Twin Waters is zoned
Selling in Twin Waters? 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 5.94 km², Twin Waters is highly constrained by planning overlays. About 95% of the suburb sits within a mapped flood overlay, and 19% is flagged bushfire-prone. There are 3 heritage-listed sites on record, and the dominant land-use zone is Environmental Management and Conservation. The terrain is largely flat, and the median lot measures about 703 m² across 1,258 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 Twin Waters
Census 2021 figures published by the ABS for the Twin Waters 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 1056, and decile 10 within Queensland. The national average is 1000.
Age profile
Share of Twin Waters's 2,966 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Marcoola - Mudjimba, the wider ABS statistical area containing Twin Waters. There is no annual population series published at suburb level, so this describes the surrounding area rather than Twin Waters itself.
6,849 in 2001 to 12,672 in 2025, up 85%.
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 Twin Waters 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 →Twin Waters planning - frequently asked
Where can I see a flood map of Twin Waters?
The schematic on this page is a Twin Waters flood map: the mapped flood overlays drawn over the suburb's terrain and street grid, covering about 95% of the suburb. Flood lines vary block to block, so for a specific property use the free interactive map - search any Twin Waters address and it shows the flood, zoning and bushfire mapping on the exact lot boundary.
Is Twin Waters flood-prone?
About 95% of Twin Waters falls within a mapped flood overlay, against a Sunshine Coast Regional average of 32%. Looking lot by lot, 81% of the 1,447 properties we analysed in Twin Waters carry some level of mapped flood risk, including 421 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 Twin Waters bushfire-prone?
Yes - around 19% of Twin Waters is mapped as bushfire-prone, compared with a Sunshine Coast Regional average of 38%. A bushfire-prone designation can trigger additional building requirements, so check the specific address.
What is the zoning in Twin Waters?
The dominant planning zone in Twin Waters is Environmental Management and Conservation, though the suburb also includes Emerging Community and Sport and Recreation. Zoning sets what you can build and do on a site, and can differ lot by lot.
Does Twin Waters have heritage-listed places?
Twin Waters has 3 heritage-listed places on record. Heritage listing affects what you can alter or demolish, so confirm whether a specific property is listed or near a heritage place.
Is Twin Waters hilly or flat?
Twin Waters is largely flat: the median lot slope is about 3%. Ground level runs from roughly 1 m to 5 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 Twin Waters?
Across 1,258 surveyed parcels in Twin Waters, the median lot size is about 703 m². There are also 169 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 Twin Waters have a train station?
There is no train station inside Twin Waters itself. The suburb is served by 1 bus stop.
What is the population of Twin Waters?
At the 2021 Census Twin Waters had 2,966 usual residents, with a median age of 60 and an average household size of 2.3 people. The wider Marcoola - Mudjimba statistical area, which contains Twin Waters, went from 6,849 people in 2001 to 12,672 in 2025, up 85%. ABS publishes no annual population series for individual suburbs, so that trend describes the surrounding area rather than Twin Waters alone.
Is Twin Waters an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Twin Waters scores 1056 and sits in decile 9 of 10 nationally and decile 10 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 Twin Waters?
Median household income in Twin Waters was $1,689 a week at the 2021 Census, against $1,674 for the typical suburb in Sunshine Coast Regional. Median rent was $650 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 Twin Waters property?
A Twin Waters 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.