Twin Waters flood map & planning overlays
Twin Waters is 93.9% flood-mapped, 4th on the Sunshine Coast. Water in the name, water on the map.
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 Twin Waters
(Sunshine Coast Regional, QLD) - 5.94 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 7 November 2026.
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. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft.
Nearby suburbs, nearest first
How common is mapped flood risk across Twin Waters properties?
Counts of properties, not share of land, across 1,447 analysed Twin Waters properties; no individual property result is identified.
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.
Aircraft noise and flight paths over Twin Waters
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 2 a day
Night movements: observed, lowest 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.
Twin Waters at a glance
Schools in and near Twin Waters
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: 0.44 km from the suburb boundary
Secondary: 1.43 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 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 94% 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 749 m² across 1,427 parcels.
Recent development applications in Twin Waters
Applications are counted across the whole gazetted suburb from the public Sunshine Coast Council register. No application address or individual property is published here.
Submitted in the past 12 months
No geocoded application submissions were found for this suburb in the period.
Counts depend on applications that the council publishes and that can be assigned to a suburb. Categories can overlap when one application covers several types. Totals below five and their latest dates are suppressed. Register last synchronised 7 November 2026. Check the official council register.
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: ABS Census 2021 and SEIFA 2021 (Suburbs and Localities), Regional Population (SA2), CC BY 4.0. Small counts are randomly adjusted by the ABS.
Twin Waters 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 |
| Development applications | Available as suburb totals | Sunshine Coast Council |
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 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 →Aircraft have been seen below 3,000 ft over about 100% of Twin Waters. 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 Twin Waters. The free check tells you whether one reaches an address; where it does, a Flood Model Report is +$9 with the planning report.
The Terrain Report shows the fall of the block - contours, cross sections and a 3D model of the lot to spin round in your browser (+$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 Twin Waters lot.
Twin Waters planning - frequently asked
Is Twin Waters flood-prone?
About 94% of Twin Waters falls within a mapped flood overlay, against the council-wide suburb average of 30%. Across the suburb, 94% of the 1,447 properties we analysed carry some level of mapped flood risk, including 467 rated high risk or historically affected. Published flood models are held over parts of Twin Waters; the free check on the Flood Model Report page says whether one reaches a given address.
Is Twin Waters bushfire-prone?
Around 19% of Twin Waters is mapped as bushfire-prone, compared with a Sunshine Coast Regional average of 38%.
Is Twin Waters under a flight path?
Aircraft were observed below 3,000 ft over about 100% of Twin Waters, in the period sampled (4 Sep 2026 to 7 Nov 2026). The lowest measured aircraft was at 500 ft, with an average of 1,500 ft. At the busiest point in the suburb about 12 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 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.
Does Twin Waters have heritage-listed places?
Twin Waters has 3 heritage-listed places on record.
Is Twin Waters hilly or flat?
Twin Waters is largely flat: the median ground slope is about 3%. Ground level runs from roughly 1 m to 5 m AHD across the suburb.
What is the typical lot size in Twin Waters?
Across 1,427 surveyed parcels in Twin Waters, the median lot size is about 749 m². There are also 169 registered easements mapped in the suburb.
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%.
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 is the most disadvantaged tenth, decile 10 the least).
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 $1,677 for the typical suburb in Sunshine Coast Regional. Median rent was $650 a week and the median mortgage repayment $2,167 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Pacific Paradise | 1.5 km | 97% | 11% |
| Mudjimba | 2.2 km | 94% | 50% |
| Maroochydore | 2.9 km | 67% | 4% |
| Kuluin | 3.8 km | 26% | 12% |
| Marcoola | 4.2 km | 96% | 38% |
| Diddillibah | 4.6 km | 48% | 17% |
| Alexandra Headland | 4.9 km | 13% | 4% |
| Kunda Park | 5.2 km | 64% | 31% |
| Bli Bli | 6.1 km | 60% | 19% |
| Buderim | 6.5 km | 17% | 40% |