O'Halloran Hill flood map & planning overlays
A planning-constraint profile of O'Halloran Hill
(City of Marion, SA) - 7.04 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
7.04 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to O'Halloran 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 O'Halloran 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
Night movements: observed, lowest 3,000 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.
O'Halloran Hill at a glance
How O'Halloran Hill is zoned
Selling in O'Halloran 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 7.04 km², O'Halloran Hill is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 44% is flagged bushfire-prone. There are 11 heritage-listed sites on record, and the dominant land-use zone is Conservation. The median lot measures about 717 m² across 1,318 parcels.
Who lives in O'Halloran Hill
Census 2021 figures published by the ABS for the O'Halloran 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 988, and decile 6 within South Australia. The national average is 1000.
Age profile
Share of O'Halloran Hill's 2,722 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Sheidow Park - Trott Park, the wider ABS statistical area containing O'Halloran Hill. There is no annual population series published at suburb level, so this describes the surrounding area rather than O'Halloran Hill itself.
7,707 in 2001 to 10,468 in 2025, up 36%.
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.
O'Halloran 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 O'Halloran 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 38% of O'Halloran 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 O'Halloran Hill lot.
See what's in the $9 report →O'Halloran Hill planning - frequently asked
Is O'Halloran Hill flood-prone?
Flood mapping covers O'Halloran Hill and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 14%).
Is O'Halloran Hill bushfire-prone?
Around 44% of O'Halloran Hill is mapped as bushfire-prone, compared with a City of Marion average of 9%.
Is O'Halloran Hill under a flight path?
Aircraft were observed below 3,000 ft over about 38% of O'Halloran Hill, and over about 69% 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 3,500 ft. 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 O'Halloran Hill?
The dominant planning zone in O'Halloran Hill is Conservation, though the suburb also includes Hills Face and General Neighbourhood.
Does O'Halloran Hill have heritage-listed places?
O'Halloran Hill has 11 heritage-listed places on record.
What is the typical lot size in O'Halloran Hill?
Across 1,318 surveyed parcels in O'Halloran Hill, the median lot size is about 717 m².
Does O'Halloran Hill have a train station?
There is no train station inside O'Halloran Hill itself. The suburb is served by 29 bus stops.
What is the population of O'Halloran Hill?
At the 2021 Census O'Halloran Hill had 2,722 usual residents, with a median age of 40 and an average household size of 2.5 people. The wider Sheidow Park - Trott Park statistical area, which contains O'Halloran Hill, went from 7,707 people in 2001 to 10,468 in 2025, up 36%.
Is O'Halloran Hill an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), O'Halloran Hill scores 988 and sits in decile 6 of 10 nationally and decile 6 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in O'Halloran Hill?
Median household income in O'Halloran Hill was $1,558 a week at the 2021 Census, against $1,579 for the typical suburb in City of Marion. Median rent was $350 a week and the median mortgage repayment $1,500 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Trott Park | 1.9 km | <1% | 0% |
| Seaview Downs | 2.2 km | 11% | 0% |
| Seacombe Heights | 2.6 km | 15% | 2% |
| Seacliff Park | 2.7 km | 16% | 0% |
| Happy Valley City of Onkaparinga |
2.7 km | 2% | 93% |
| Flagstaff Hill City of Onkaparinga |
2.9 km | 2% | 100% |
| Darlington | 2.9 km | 14% | 84% |
| Sheidow Park | 3.0 km | 0% | 0% |
| Reynella East City of Onkaparinga |
3.4 km | 11% | 4% |
| Marino | 3.5 km | 14% | 0% |