Diddillibah flood map & planning overlays
A planning-constraint profile of Diddillibah
(Sunshine Coast Regional, QLD) - 11.01 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 19 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
11.01 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Diddillibah's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
How common is mapped flood risk across Diddillibah properties?
Overlay percentages say how much land is constrained; these figures say how many properties are actually touched in a suburb-wide analysis of 503 Diddillibah properties. No individual property result is identified on this page.
Lot-level readout
Flood-risk rating across all 503 properties
From LayeredGeo's lot-risk engine: council flood overlays, historical flooding and terrain, resolved to each individual lot in Diddillibah.
Diddillibah at a glance
Schools in and near Diddillibah
Public school-location data shows availability across the suburb. These figures do not rate schools and do not assign a particular 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: 0.86 km from the suburb boundary
Secondary: 1.36 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 Diddillibah is zoned
Selling in Diddillibah? 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 11.01 km², Diddillibah is highly constrained by planning overlays. About 48% of the suburb sits within a mapped flood overlay, and 17% is flagged bushfire-prone. There are 3 heritage-listed sites on record, and the dominant land-use zone is Rural. The terrain is hilly, and the median lot measures about 6,593 m² across 473 parcels.
Recent development applications in Diddillibah
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
Latest included submission: 21 May 2026.
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 20 September 2026. Check the official council register.
Who lives in Diddillibah
Census 2021 figures published by the ABS for the Diddillibah 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 990, and decile 7 within Queensland. The national average is 1000.
Age profile
Share of Diddillibah's 1,703 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Diddillibah - Rosemount, the wider ABS statistical area containing Diddillibah. There is no annual population series published at suburb level, so this describes the surrounding area rather than Diddillibah itself.
3,032 in 2001 to 4,731 in 2025, up 56%.
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.
Diddillibah 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 |
| 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 19 September 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 Diddillibah 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.
Published flood models are held over parts of Diddillibah. 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 (+$9 with the planning report).
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Diddillibah lot.
See what's in the $9 report →Diddillibah planning - frequently asked
Is Diddillibah flood-prone?
About 48% of Diddillibah falls within a mapped flood overlay, against the council-wide suburb average of 30%. Across the suburb, 29% of the 503 properties we analysed carry some level of mapped flood risk, including 105 rated high risk or historically affected.
Is Diddillibah bushfire-prone?
Around 17% of Diddillibah is mapped as bushfire-prone, compared with a Sunshine Coast Regional average of 38%.
What is the zoning in Diddillibah?
The dominant planning zone in Diddillibah is Rural, though the suburb also includes Rural Residential and Environmental Management and Conservation.
Does Diddillibah have heritage-listed places?
Diddillibah has 3 heritage-listed places on record.
Is Diddillibah hilly or flat?
Diddillibah is hilly: the median ground slope is about 12%, and 35% of measured points sit on grades of 15% or steeper. Ground level runs from roughly 1 m to 63 m AHD across the suburb.
What is the typical lot size in Diddillibah?
Across 473 surveyed parcels in Diddillibah, the median lot size is about 6,593 m². There are also 217 registered easements mapped in the suburb.
Does Diddillibah have a train station?
There is no train station inside Diddillibah itself. The suburb is served by 2 bus stops.
What is the population of Diddillibah?
At the 2021 Census Diddillibah had 1,703 usual residents, with a median age of 46 and an average household size of 2.6 people. The wider Diddillibah - Rosemount statistical area, which contains Diddillibah, went from 3,032 people in 2001 to 4,731 in 2025, up 56%.
Is Diddillibah an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Diddillibah scores 990 and sits in decile 6 of 10 nationally and decile 7 within Queensland (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Diddillibah?
Median household income in Diddillibah was $1,424 a week at the 2021 Census, against $1,677 for the typical suburb in Sunshine Coast Regional. Median rent was $330 a week and the median mortgage repayment $2,200 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Kunda Park | 1.4 km | 64% | 31% |
| Kuluin | 2.1 km | 26% | 12% |
| Kiels Mountain | 3.2 km | 6% | 47% |
| Rosemount | 3.8 km | 40% | 20% |
| Forest Glen | 4.1 km | 49% | 34% |
| Bli Bli | 4.5 km | 60% | 19% |
| Twin Waters | 4.6 km | 94% | 19% |
| Maroochydore | 4.8 km | 67% | 4% |
| Mons | 5.0 km | 4% | 39% |
| Pacific Paradise | 5.0 km | 97% | 11% |