Buchanan flood map & planning overlays
A planning-constraint profile of Buchanan
(The Regional Council of Goyder, SA) - 52.04 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
52.04 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Buchanan'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 Buchanan
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: 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.
Buchanan at a glance
How Buchanan is zoned
Selling in Buchanan? 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 52.04 km², Buchanan 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 is 1 heritage-listed site on record, and the dominant land-use zone is Rural. The median lot measures about 429,933 m² across 108 parcels.
Who lives in Buchanan
Census 2021 figures published by the ABS for the Buchanan 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 940, and decile 3 within South Australia. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Goyder, the wider ABS statistical area containing Buchanan. There is no annual population series published at suburb level, so this describes the surrounding area rather than Buchanan itself.
4,265 in 2001 to 4,152 in 2025, down 3%.
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.
Buchanan 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 Buchanan 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.
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 Buchanan lot.
See what's in the $9 report →Buchanan planning - frequently asked
Is Buchanan flood-prone?
Flood mapping covers Buchanan and none of the suburb falls within a mapped flood overlay.
Is Buchanan bushfire-prone?
Around 100% of Buchanan is mapped as bushfire-prone, compared with a The Regional Council of Goyder average of 100%.
Is Buchanan under a flight path?
Aircraft were observed over about 3% of Buchanan in the period sampled, but only above 3,000 ft - the lowest measured was 3,000 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 Buchanan?
The dominant planning zone in Buchanan is Rural.
Does Buchanan have heritage-listed places?
Buchanan has 1 heritage-listed place on record.
What is the typical lot size in Buchanan?
Across 108 surveyed parcels in Buchanan, the median lot size is about 429,933 m².
What is the population of Buchanan?
At the 2021 Census Buchanan had 51 usual residents, with a median age of 29 and an average household size of 3.4 people. The wider Goyder statistical area, which contains Buchanan, went from 4,265 people in 2001 to 4,152 in 2025, down 3%.
Is Buchanan an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Buchanan scores 940 and sits in decile 3 of 10 nationally and decile 3 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Buchanan?
Median household income in Buchanan was $1,312 a week at the 2021 Census, against $1,021 for the typical suburb in The Regional Council of Goyder. Median rent was $250 a week and the median mortgage repayment $498 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Hampden | 5.6 km | 0% | 100% |
| Hansborough | 6.5 km | 0% | 100% |
| Tarnma Clare and Gilbert Valleys Council |
8.2 km | 0% | 100% |
| Eudunda | 9.2 km | 0% | 99% |
| Bagot Well Light Regional Council |
9.8 km | 0% | 100% |
| Hamilton Light Regional Council |
10.0 km | 0% | 100% |
| Julia | 10.3 km | 0% | 100% |
| Allendale North Light Regional Council |
11.8 km | 0% | 100% |
| Marrabel Clare and Gilbert Valleys Council |
14.3 km | 0% | 100% |
| Point Pass | 14.7 km | 0% | 100% |