Horsnell Gully flood map & planning overlays
A planning-constraint profile of Horsnell Gully
(Adelaide Hills Council, SA) - 8.15 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
8.15 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Horsnell Gully'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 Horsnell Gully
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 0 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.
Horsnell Gully at a glance
How Horsnell Gully is zoned
Selling in Horsnell Gully? 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 8.15 km², Horsnell Gully is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls 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 Face. The median lot measures about 78,622 m² across 34 parcels.
Who lives in Horsnell Gully
Census 2021 figures published by the ABS for the Horsnell Gully suburb boundary itself, not a wider region.
Population trend, 2001 to 2025
Estimated resident population of Uraidla - Summertown, the wider ABS statistical area containing Horsnell Gully. There is no annual population series published at suburb level, so this describes the surrounding area rather than Horsnell Gully itself.
5,256 in 2001 to 6,484 in 2025, up 23%.
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.
Horsnell Gully 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 Horsnell Gully 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 47% of Horsnell Gully. 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 Horsnell Gully lot.
See what's in the $9 report →Horsnell Gully planning - frequently asked
Is Horsnell Gully flood-prone?
Flood mapping covers Horsnell Gully and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 1%).
Is Horsnell Gully bushfire-prone?
Around 100% of Horsnell Gully is mapped as bushfire-prone, compared with a Adelaide Hills Council average of 100%.
Is Horsnell Gully under a flight path?
Aircraft were observed below 3,000 ft over about 47% of Horsnell Gully, and over about 62% 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 4,000 ft. At the busiest point in the suburb about 2 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 Horsnell Gully?
The dominant planning zone in Horsnell Gully is Hills Face, though the suburb also includes Conservation.
Does Horsnell Gully have heritage-listed places?
Horsnell Gully has 2 heritage-listed places on record.
What is the typical lot size in Horsnell Gully?
Across 34 surveyed parcels in Horsnell Gully, the median lot size is about 78,622 m².
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Skye City of Burnside |
1.7 km | 0% | 100% |
| Greenhill | 2.1 km | 0% | 100% |
| Teringie | 2.3 km | 0% | 100% |
| Auldana City of Burnside |
2.5 km | 0% | 100% |
| Stonyfell City of Burnside |
2.6 km | 3% | 83% |
| Wattle Park City of Burnside |
2.6 km | 0% | 72% |
| Ashton | 2.6 km | 0% | 100% |
| Rosslyn Park City of Burnside |
3.0 km | 0% | 41% |
| Woodforde | 3.3 km | 0% | 97% |
| Norton Summit | 3.4 km | 0% | 100% |