Onkaparinga Hills flood map & planning overlays
A planning-constraint profile of Onkaparinga Hills
(City of Onkaparinga, SA) - 26.3 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 26 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
26.3 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Onkaparinga Hills'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 Onkaparinga Hills
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 26 Sep 2026
typical observed square 11 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.
Onkaparinga Hills at a glance
How Onkaparinga Hills is zoned
Selling in Onkaparinga Hills? 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 26.3 km², Onkaparinga Hills 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 4 heritage-listed sites on record, and the dominant land-use zone is Hills Face. The median lot measures about 951 m² across 1,074 parcels.
Who lives in Onkaparinga Hills
Census 2021 figures published by the ABS for the Onkaparinga Hills 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 1012, and decile 7 within South Australia. The national average is 1000.
Age profile
Share of Onkaparinga Hills's 2,610 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Hackham - Onkaparinga Hills, the wider ABS statistical area containing Onkaparinga Hills. There is no annual population series published at suburb level, so this describes the surrounding area rather than Onkaparinga Hills itself.
6,209 in 2001 to 7,376 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.
Onkaparinga Hills 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 26 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 Onkaparinga Hills 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 14% of Onkaparinga Hills. 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 Onkaparinga Hills lot.
See what's in the $9 report →Onkaparinga Hills planning - frequently asked
Is Onkaparinga Hills flood-prone?
Flood mapping covers Onkaparinga Hills and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 4%).
Is Onkaparinga Hills bushfire-prone?
Around 99% of Onkaparinga Hills is mapped as bushfire-prone, compared with a City of Onkaparinga average of 69%.
Is Onkaparinga Hills under a flight path?
Aircraft were observed below 3,000 ft over about 14% of Onkaparinga Hills, and over about 44% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 26 Sep 2026). The lowest measured aircraft was at 1,000 ft, with an average of 6,000 ft. At the busiest point in the suburb about 14 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 Onkaparinga Hills?
The dominant planning zone in Onkaparinga Hills is Hills Face, though the suburb also includes Conservation and Hills Neighbourhood.
Does Onkaparinga Hills have heritage-listed places?
Onkaparinga Hills has 4 heritage-listed places on record.
What is the typical lot size in Onkaparinga Hills?
Across 1,074 surveyed parcels in Onkaparinga Hills, the median lot size is about 951 m².
Does Onkaparinga Hills have a train station?
There is no train station inside Onkaparinga Hills itself. The suburb is served by 4 bus stops.
What is the population of Onkaparinga Hills?
At the 2021 Census Onkaparinga Hills had 2,610 usual residents, with a median age of 45 and an average household size of 2.9 people. The wider Hackham - Onkaparinga Hills statistical area, which contains Onkaparinga Hills, went from 6,209 people in 2001 to 7,376 in 2025, up 19%.
Is Onkaparinga Hills an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Onkaparinga Hills scores 1012 and sits in decile 7 of 10 nationally and decile 7 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Onkaparinga Hills?
Median household income in Onkaparinga Hills was $2,078 a week at the 2021 Census, against $1,512 for the typical suburb in City of Onkaparinga. Median rent was $385 a week and the median mortgage repayment $1,625 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Woodcroft | 3.5 km | <1% | 76% |
| Hackham | 3.8 km | 3% | 42% |
| Blewitt Springs | 4.1 km | 0% | 100% |
| Morphett Vale | 4.4 km | 2% | 25% |
| Hackham West | 5.2 km | 0% | 0% |
| Onkaparinga Heights | 5.3 km | 0% | 100% |
| Old Reynella | 5.6 km | 2% | 23% |
| Huntfield Heights | 5.7 km | 6% | 32% |
| Reynella East | 5.8 km | 11% | 4% |
| Clarendon | 5.9 km | <1% | 100% |