Willunga Hill flood map & planning overlays
A planning-constraint profile of Willunga Hill
(Alexandrina Council, SA) - 11.85 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
11.85 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Willunga Hill'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 Hill
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 6 a day
Night movements: observed, lowest 6,000 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 Hill at a glance
How Willunga Hill is zoned
Selling in Willunga Hill? 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 11.85 km², Willunga Hill is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 100% is flagged bushfire-prone. The dominant land-use zone is Productive Rural Landscape. The median lot measures about 86,390 m² across 60 parcels.
Who lives in Willunga Hill
Census 2021 figures published by the ABS for the Willunga Hill 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 1038, and decile 9 within South Australia. The national average is 1000.
Age profile
Share of Willunga Hill's 150 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Strathalbyn Surrounds, the wider ABS statistical area containing Willunga Hill. There is no annual population series published at suburb level, so this describes the surrounding area rather than Willunga Hill itself.
5,223 in 2001 to 8,615 in 2025, up 65%.
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 Hill 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 Hill 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 27% of Willunga Hill. 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 Hill lot.
See what's in the $9 report →Willunga Hill planning - frequently asked
Is Willunga Hill flood-prone?
Flood mapping covers Willunga Hill and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 16%).
Is Willunga Hill bushfire-prone?
Around 100% of Willunga Hill is mapped as bushfire-prone, compared with a Alexandrina Council average of 100%.
Is Willunga Hill under a flight path?
Aircraft were observed below 3,000 ft over about 27% of Willunga Hill, and over about 66% 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 1,500 ft, with an average of 3,000 ft. At the busiest point in the suburb about 6 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 Hill?
The dominant planning zone in Willunga Hill is Productive Rural Landscape, though the suburb also includes Hills Face.
Does Willunga Hill have heritage-listed places?
No heritage-listed places are on record within Willunga Hill.
What is the typical lot size in Willunga Hill?
Across 60 surveyed parcels in Willunga Hill, the median lot size is about 86,390 m².
What is the population of Willunga Hill?
At the 2021 Census Willunga Hill had 150 usual residents, with a median age of 41 and an average household size of 3.0 people. The wider Strathalbyn Surrounds statistical area, which contains Willunga Hill, went from 5,223 people in 2001 to 8,615 in 2025, up 65%.
Is Willunga Hill an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Willunga Hill scores 1038 and sits in decile 8 of 10 nationally and decile 9 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Willunga Hill?
Median household income in Willunga Hill was $2,055 a week at the 2021 Census, against $1,655 for the typical suburb in Alexandrina Council. Median rent was $363 a week and the median mortgage repayment $2,167 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Hope Forest | 3.7 km | 0% | 100% |
| Willunga City of Onkaparinga |
3.8 km | 0% | 99% |
| Yundi | 4.1 km | 0% | 100% |
| Willunga South City of Onkaparinga |
4.2 km | 0% | 100% |
| Montarra | 4.6 km | 0% | 100% |
| Pages Flat | 5.6 km | 0% | 100% |
| Dingabledinga | 5.8 km | 0% | 100% |
| Mount Compass | 6.5 km | 0% | 100% |
| The Range City of Onkaparinga |
7.2 km | 0% | 100% |
| Whites Valley City of Onkaparinga |
7.4 km | 0% | 100% |