One Tree Hill flood map & planning overlays
A planning-constraint profile of One Tree Hill
(City of Playford, SA) - 23.12 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
23.12 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to One Tree 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 One Tree 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 3 a day
Night movements: observed, lowest 5,000 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.
One Tree Hill at a glance
How One Tree Hill is zoned
Selling in One Tree 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 23.12 km², One Tree Hill is highly constrained by planning overlays. About 1% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. There are 13 heritage-listed sites on record, and the dominant land-use zone is Hills Face. The median lot measures about 5,662 m² across 431 parcels.
Who lives in One Tree Hill
Census 2021 figures published by the ABS for the One Tree 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 One Tree Hill's 1,043 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of One Tree Hill, the wider ABS statistical area containing One Tree Hill. There is no annual population series published at suburb level, so this describes the surrounding area rather than One Tree Hill itself.
2,607 in 2001 to 2,520 in 2025, down 3%.
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.
One Tree 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 One Tree 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 73% of One Tree 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 One Tree Hill lot.
See what's in the $9 report →One Tree Hill planning - frequently asked
Is One Tree Hill flood-prone?
About 1% of One Tree Hill falls within a mapped flood overlay, against the council-wide suburb average of 26%.
Is One Tree Hill bushfire-prone?
Around 100% of One Tree Hill is mapped as bushfire-prone, compared with a City of Playford average of 49%.
Is One Tree Hill under a flight path?
Aircraft were observed below 3,000 ft over about 73% of One Tree Hill, and over about 89% 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 1,000 ft, with an average of 2,500 ft. At the busiest point in the suburb about 11 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 One Tree Hill?
The dominant planning zone in One Tree Hill is Hills Face, though the suburb also includes Rural Neighbourhood and Township.
Does One Tree Hill have heritage-listed places?
One Tree Hill has 13 heritage-listed places on record.
What is the typical lot size in One Tree Hill?
Across 431 surveyed parcels in One Tree Hill, the median lot size is about 5,662 m².
What is the population of One Tree Hill?
At the 2021 Census One Tree Hill had 1,043 usual residents, with a median age of 45 and an average household size of 3.0 people. The wider One Tree Hill statistical area, which contains One Tree Hill, went from 2,607 people in 2001 to 2,520 in 2025, down 3%.
Is One Tree Hill an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), One Tree 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 One Tree Hill?
Median household income in One Tree Hill was $2,317 a week at the 2021 Census, against $1,542 for the typical suburb in City of Playford. Median rent was $305 a week and the median mortgage repayment $1,863 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Gould Creek City of Tea Tree Gully |
3.1 km | 9% | 100% |
| Craigmore | 3.4 km | 17% | 40% |
| Elizabeth Downs | 5.0 km | 34% | 0% |
| Elizabeth Park | 5.3 km | 38% | 0% |
| Sampson Flat | 5.3 km | 0% | 100% |
| Uleybury | 5.4 km | 3% | 100% |
| Greenwith City of Tea Tree Gully |
5.6 km | 19% | 87% |
| Hillbank | 5.6 km | 12% | 87% |
| Golden Grove City of Tea Tree Gully |
5.7 km | 19% | 68% |
| Blakeview | 5.7 km | 25% | 40% |