Birchmore flood map & planning overlays
A planning-constraint profile of Birchmore
(Kangaroo Island Council, SA) - 42.69 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
42.69 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Birchmore's boundary, with the flood, bushfire and environmental overlays drawn on top. Amber hatching is the published aircraft noise (ANEF) contour. 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 Birchmore
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.
Inside an aircraft noise contour
7% of the suburb's land sits inside a published ANEF or airport-environs contour. Contours vary street by street, so whether a particular lot is inside one needs a property-level check.
Contours held
- SA Planning and Design Code aircraft noise
Observed overflight - sampled 4 Sep to 3 Oct 2026
typical observed square 1 a day
Night movements: observed, lowest 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.
Birchmore at a glance
How Birchmore is zoned
Selling in Birchmore? 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 42.69 km², Birchmore 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. The dominant land-use zone is Rural. The median lot measures about 911,292 m² across 30 parcels.
Who lives in Birchmore
Census 2021 figures published by the ABS for the Birchmore 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 992, and decile 6 within South Australia. The national average is 1000.
Age profile
Share of Birchmore's 49 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Kangaroo Island, the wider ABS statistical area containing Birchmore. There is no annual population series published at suburb level, so this describes the surrounding area rather than Birchmore itself.
4,227 in 2001 to 5,212 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.
Birchmore 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) | Inside a held contour | 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 Birchmore 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 34% of Birchmore. 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 Birchmore lot.
See what's in the $9 report →Birchmore planning - frequently asked
Is Birchmore flood-prone?
Flood mapping covers Birchmore and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 7%).
Is Birchmore bushfire-prone?
Around 100% of Birchmore is mapped as bushfire-prone, compared with a Kangaroo Island Council average of 96%.
Is Birchmore affected by aircraft noise?
About 7% of Birchmore sits inside a published aircraft noise contour. ANEF contours are forecasts published per airport and used to control noise-sensitive development; they are not a measurement at any one house, and a property can sit under a flight path and outside every contour.
Is Birchmore under a flight path?
Aircraft were observed below 3,000 ft over about 34% of Birchmore, and over about 47% 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 500 ft, with an average of 2,000 ft. At the busiest point in the suburb about 6 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 Birchmore?
The dominant planning zone in Birchmore is Rural, though the suburb also includes Infrastructure (Airfield).
Does Birchmore have heritage-listed places?
No heritage-listed places are on record within Birchmore.
What is the typical lot size in Birchmore?
Across 30 surveyed parcels in Birchmore, the median lot size is about 911,292 m².
Is Birchmore an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Birchmore scores 992 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).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Kohinoor | 7.2 km | 0% | 100% |
| Cygnet River | 9.0 km | 28% | 90% |
| Menzies | 10.1 km | 0% | 100% |
| Haines | 14.4 km | <1% | 100% |
| Macgillivray | 14.8 km | 0% | 100% |
| Brownlow Ki | 14.9 km | 48% | 88% |
| Wisanger | 15.8 km | 3% | 99% |
| Nepean Bay | 16.6 km | 16% | 90% |
| Kingscote | 16.7 km | 6% | 92% |
| Bay Of Shoals | 19.1 km | 13% | 94% |