Strathalbyn flood map & planning overlays
A planning-constraint profile of Strathalbyn
(Alexandrina Council, SA) - 117.01 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
117.01 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Strathalbyn'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 Strathalbyn
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
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.
Strathalbyn at a glance
How Strathalbyn is zoned
Selling in Strathalbyn? 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 117.01 km², Strathalbyn is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 99% is flagged bushfire-prone. There are 202 heritage-listed sites on record, and the dominant land-use zone is Rural. The median lot measures about 943 m² across 4,437 parcels.
Who lives in Strathalbyn
Census 2021 figures published by the ABS for the Strathalbyn 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 947, and decile 4 within South Australia. The national average is 1000.
Age profile
Share of Strathalbyn's 7,246 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Strathalbyn, the wider ABS statistical area containing Strathalbyn. There is no annual population series published at suburb level, so this describes the surrounding area rather than Strathalbyn itself.
4,842 in 2001 to 8,670 in 2025, up 79%.
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.
Strathalbyn 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 Strathalbyn 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 Strathalbyn lot.
See what's in the $9 report →Strathalbyn planning - frequently asked
Is Strathalbyn flood-prone?
Flood mapping covers Strathalbyn and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 16%).
Is Strathalbyn bushfire-prone?
Around 99% of Strathalbyn is mapped as bushfire-prone, compared with a Alexandrina Council average of 100%.
Is Strathalbyn under a flight path?
Aircraft were observed over about 27% of Strathalbyn in the period sampled, but only above 3,000 ft - the lowest measured was 2,000 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 Strathalbyn?
The dominant planning zone in Strathalbyn is Rural, though the suburb also includes Productive Rural Landscape and Rural Living.
Does Strathalbyn have heritage-listed places?
Strathalbyn has 202 heritage-listed places on record.
What is the typical lot size in Strathalbyn?
Across 4,437 surveyed parcels in Strathalbyn, the median lot size is about 943 m².
Does Strathalbyn have a train station?
There is no train station inside Strathalbyn itself. The suburb is served by 17 bus stops.
What is the population of Strathalbyn?
At the 2021 Census Strathalbyn had 7,246 usual residents, with a median age of 47 and an average household size of 2.4 people. The wider Strathalbyn statistical area, which contains Strathalbyn, went from 4,842 people in 2001 to 8,670 in 2025, up 79%.
Is Strathalbyn an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Strathalbyn scores 947 and sits in decile 3 of 10 nationally and decile 4 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Strathalbyn?
Median household income in Strathalbyn was $1,254 a week at the 2021 Census, against $1,655 for the typical suburb in Alexandrina Council. Median rent was $300 a week and the median mortgage repayment $1,500 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Willyaroo | 5.9 km | 0% | 100% |
| Paris Creek | 6.7 km | 0% | 100% |
| Macclesfield Mount Barker District Council |
8.4 km | 0% | 100% |
| Gemmells | 8.5 km | 0% | 100% |
| Sandergrove | 8.6 km | 0% | 100% |
| Belvidere | 8.9 km | 0% | 100% |
| Bull Creek Mount Barker District Council |
9.8 km | 0% | 100% |
| Woodchester | 10.0 km | 0% | 100% |
| Bletchley | 10.2 km | 4% | 100% |
| Highland Valley | 10.4 km | 0% | 100% |