Flagstaff Hill flood map & planning overlays
A planning-constraint profile of Flagstaff Hill
(City of Onkaparinga, SA) - 8.45 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
8.45 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Flagstaff 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 Flagstaff 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 26 Sep 2026
typical observed square 1 a day
Night movements: observed, lowest 2,500 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.
Flagstaff Hill at a glance
How Flagstaff Hill is zoned
Selling in Flagstaff 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 8.45 km², Flagstaff Hill is highly constrained by planning overlays. About 2% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. There are 2 heritage-listed sites on record, and the dominant land-use zone is Hills Neighbourhood. The median lot measures about 823 m² across 4,116 parcels.
Who lives in Flagstaff Hill
Census 2021 figures published by the ABS for the Flagstaff 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 1047, and decile 9 within South Australia. The national average is 1000.
Age profile
Share of Flagstaff Hill's 10,184 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Flagstaff Hill, the wider ABS statistical area containing Flagstaff Hill. There is no annual population series published at suburb level, so this describes the surrounding area rather than Flagstaff Hill itself.
9,909 in 2001 to 11,370 in 2025, up 15%.
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.
Flagstaff 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 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 Flagstaff 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 26% of Flagstaff 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 Flagstaff Hill lot.
See what's in the $9 report →Flagstaff Hill planning - frequently asked
Is Flagstaff Hill flood-prone?
About 2% of Flagstaff Hill falls within a mapped flood overlay, against the council-wide suburb average of 4%.
Is Flagstaff Hill bushfire-prone?
Around 100% of Flagstaff Hill is mapped as bushfire-prone, compared with a City of Onkaparinga average of 69%.
Is Flagstaff Hill under a flight path?
Aircraft were observed below 3,000 ft over about 26% of Flagstaff Hill, and over about 71% 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 500 ft, with an average of 4,000 ft. At the busiest point in the suburb about 1 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 Flagstaff Hill?
The dominant planning zone in Flagstaff Hill is Hills Neighbourhood, though the suburb also includes General Neighbourhood and Conservation.
Does Flagstaff Hill have heritage-listed places?
Flagstaff Hill has 2 heritage-listed places on record.
What is the typical lot size in Flagstaff Hill?
Across 4,116 surveyed parcels in Flagstaff Hill, the median lot size is about 823 m².
Does Flagstaff Hill have a train station?
There is no train station inside Flagstaff Hill itself. The suburb is served by 40 bus stops.
What is the population of Flagstaff Hill?
At the 2021 Census Flagstaff Hill had 10,184 usual residents, with a median age of 43 and an average household size of 2.7 people. The wider Flagstaff Hill statistical area, which contains Flagstaff Hill, went from 9,909 people in 2001 to 11,370 in 2025, up 15%.
Is Flagstaff Hill an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Flagstaff Hill scores 1047 and sits in decile 9 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 Flagstaff Hill?
Median household income in Flagstaff Hill was $2,080 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 $1,733 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Craigburn Farm City of Mitcham |
2.1 km | 3% | 100% |
| Bellevue Heights City of Mitcham |
2.3 km | 5% | 100% |
| O'Halloran Hill City of Marion |
2.9 km | 0% | 44% |
| Happy Valley | 2.9 km | 2% | 93% |
| Darlington City of Marion |
3.1 km | 14% | 84% |
| Aberfoyle Park | 3.1 km | 1% | 76% |
| Bedford Park City of Mitcham |
3.2 km | 11% | 98% |
| Eden Hills City of Mitcham |
3.3 km | 6% | 100% |
| Seacombe Heights City of Marion |
3.6 km | 15% | 2% |
| Sturt City of Marion |
3.8 km | 32% | 38% |