Highgate flood map & planning overlays
A planning-constraint profile of Highgate
(City of Unley, SA) - 0.57 km², mapped from live council and
state overlay data. This suburb is relatively unconstrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
0.57 km² - this suburb is relatively unconstrained by planning overlays.
Elevation hillshade with street names, clipped to Highgate'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 Highgate
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 1 a day
Night movements: not established - night is sampled as often as day, but too few night flights have been seen here to conclude either way.
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.
Highgate at a glance
How Highgate is zoned
Selling in Highgate? 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 0.57 km², Highgate is relatively unconstrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay. There are 10 heritage-listed sites on record, and the dominant land-use zone is Established Neighbourhood. The median lot measures about 516 m² across 790 parcels.
Who lives in Highgate
Census 2021 figures published by the ABS for the Highgate 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 1112, and decile 10 within South Australia. The national average is 1000.
Age profile
Share of Highgate's 1,504 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Unley - Parkside, the wider ABS statistical area containing Highgate. There is no annual population series published at suburb level, so this describes the surrounding area rather than Highgate itself.
19,493 in 2001 to 22,225 in 2025, up 14%.
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.
Highgate 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 Highgate 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 42% of Highgate. 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 Highgate lot.
See what's in the $9 report →Highgate planning - frequently asked
Is Highgate flood-prone?
Flood mapping covers Highgate and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 20%).
Is Highgate bushfire-prone?
Bushfire mapping covers Highgate and little to none of it is mapped as bushfire-prone.
Is Highgate under a flight path?
Aircraft were observed below 3,000 ft over about 42% of Highgate, and over about 77% 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 3,500 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 Highgate?
The dominant planning zone in Highgate is Established Neighbourhood, though the suburb also includes Community Facilities and Urban Renewal Neighbourhood.
Does Highgate have heritage-listed places?
Highgate has 10 heritage-listed places on record.
What is the typical lot size in Highgate?
Across 790 surveyed parcels in Highgate, the median lot size is about 516 m².
Does Highgate have a train station?
There is no train station inside Highgate itself. The suburb is served by 7 bus stops.
What is the population of Highgate?
At the 2021 Census Highgate had 1,504 usual residents, with a median age of 41 and an average household size of 2.6 people. The wider Unley - Parkside statistical area, which contains Highgate, went from 19,493 people in 2001 to 22,225 in 2025, up 14%.
Is Highgate an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Highgate scores 1112 and sits in decile 10 of 10 nationally and decile 10 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Highgate?
Median household income in Highgate was $2,192 a week at the 2021 Census, against $2,008 for the typical suburb in City of Unley. Median rent was $360 a week and the median mortgage repayment $2,009 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Netherby City of Mitcham |
0.9 km | <1% | 5% |
| Malvern | 0.9 km | 20% | 0% |
| Myrtle Bank | 1.1 km | 10% | 0% |
| Fullarton | 1.2 km | 10% | 0% |
| Kingswood City of Mitcham |
1.3 km | <1% | 0% |
| Frewville City of Burnside |
1.7 km | 0% | 0% |
| Urrbrae City of Mitcham |
1.8 km | 0% | 56% |
| Parkside | 1.8 km | 5% | 0% |
| Hyde Park | 1.8 km | 22% | 0% |
| Unley Park | 1.9 km | 29% | 0% |