Willunga flood map & planning overlays
A planning-constraint profile of Willunga
(City of Onkaparinga, SA) - 21.27 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
21.27 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Willunga'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 Willunga
Two different things, kept apart on purpose. The ANEF contour is the planning instrument - a forecast published per airport that planning schemes use to control noise-sensitive development. Observed overflight is what a sampled aircraft-tracking feed actually recorded over the suburb - where aircraft flew, how low and how often.
Observed overflight - sampled 4 Sep to 3 Oct 2026
typical observed square 4 a day
Night movements: observed, lowest 5,500 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.
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.
Willunga at a glance
How Willunga is zoned
Selling in Willunga? The zone and overlays on this page are the Planning and Design Code controls a Form 1 vendor's statement has to disclose.
Across its 21.27 km², Willunga is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 99% is flagged bushfire-prone. There are 105 heritage-listed sites on record, and the dominant land-use zone is Hills Face. The median lot measures about 1,013 m² across 1,291 parcels.
Who lives in Willunga
Census 2021 figures published by the ABS for the Willunga 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 1025, and decile 8 within South Australia. The national average is 1000.
Age profile
Share of Willunga's 2,445 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Willunga, the wider ABS statistical area containing Willunga. There is no annual population series published at suburb level, so this describes the surrounding area rather than Willunga itself.
3,173 in 2001 to 3,784 in 2025, up 19%.
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.
Willunga 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 South Australian Planning and Design Code and Location SA spatial data |
| Bushfire-prone mapping | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Zoning | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Heritage and environment | Mapped where published | the South Australian Planning and Design Code and Location SA spatial data |
| Aircraft noise contours (ANEF) | Not held | the South Australian Planning and Design Code and Location SA spatial data, Defence |
| Observed flight paths | Observed | adsb.lol, under the Open Database License |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 3 October 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 Willunga 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.
Aircraft have been seen below 3,000 ft over about 49% of Willunga. The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Willunga lot.
See what's in the $9 report →Willunga planning - frequently asked
Is Willunga flood-prone?
Flood mapping covers Willunga and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 4%).
Is Willunga bushfire-prone?
Around 99% of Willunga is mapped as bushfire-prone, compared with a City of Onkaparinga average of 69%.
Is Willunga under a flight path?
Aircraft were observed below 3,000 ft over about 49% of Willunga, and over about 68% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 3 Oct 2026). The lowest measured aircraft was at 500 ft, with an average of 4,500 ft. At the busiest point in the suburb about 16 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 Willunga?
The dominant planning zone in Willunga is Hills Face, though the suburb also includes Rural and Township Neighbourhood.
Does Willunga have heritage-listed places?
Willunga has 105 heritage-listed places on record.
What is the typical lot size in Willunga?
Across 1,291 surveyed parcels in Willunga, the median lot size is about 1,013 m².
Does Willunga have a train station?
There is no train station inside Willunga itself. The suburb is served by 14 bus stops.
What is the population of Willunga?
At the 2021 Census Willunga had 2,445 usual residents, with a median age of 47 and an average household size of 2.5 people. The wider Willunga statistical area, which contains Willunga, went from 3,173 people in 2001 to 3,784 in 2025, up 19%.
Is Willunga an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Willunga scores 1025 and sits in decile 8 of 10 nationally and decile 8 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Willunga?
Median household income in Willunga was $1,681 a week at the 2021 Census, against $1,512 for the typical suburb in City of Onkaparinga. Median rent was $330 a week and the median mortgage repayment $1,683 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Willunga Hill Alexandrina Council |
3.8 km | 0% | 100% |
| Willunga South | 4.2 km | 0% | 100% |
| Montarra Alexandrina Council |
4.3 km | 0% | 100% |
| Whites Valley | 4.8 km | 0% | 100% |
| Hope Forest Alexandrina Council |
5.4 km | 0% | 100% |
| The Range | 5.8 km | 0% | 100% |
| Dingabledinga Alexandrina Council |
6.3 km | 0% | 100% |
| Tatachilla | 6.3 km | 0% | 100% |
| Yundi Alexandrina Council |
7.5 km | 0% | 100% |
| Pages Flat Alexandrina Council |
7.7 km | 0% | 100% |