Blakiston flood map & planning overlays
A planning-constraint profile of Blakiston
(Mount Barker District Council, SA) - 2.78 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
2.78 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Blakiston'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 Blakiston
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 3 a day
Night movements: observed, lowest 8,000 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.
Blakiston at a glance
How Blakiston is zoned
Selling in Blakiston? 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 2.78 km², Blakiston 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 6 heritage-listed sites on record, and the dominant land-use zone is Rural Living. The median lot measures about 10,469 m² across 145 parcels.
Who lives in Blakiston
Census 2021 figures published by the ABS for the Blakiston 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 1070, and decile 10 within South Australia. The national average is 1000.
Age profile
Share of Blakiston's 377 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Mount Barker, the wider ABS statistical area containing Blakiston. There is no annual population series published at suburb level, so this describes the surrounding area rather than Blakiston itself.
10,820 in 2001 to 26,939 in 2025, up 149%.
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.
Blakiston 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 Blakiston 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 Blakiston lot.
See what's in the $9 report →Blakiston planning - frequently asked
Is Blakiston flood-prone?
Flood mapping covers Blakiston and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 0%).
Is Blakiston bushfire-prone?
Around 100% of Blakiston is mapped as bushfire-prone, compared with a Mount Barker District Council average of 100%.
Is Blakiston under a flight path?
Aircraft were observed over about 30% of Blakiston in the period sampled, but only above 3,000 ft - the lowest measured was 6,500 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 Blakiston?
The dominant planning zone in Blakiston is Rural Living, though the suburb also includes Rural.
Does Blakiston have heritage-listed places?
Blakiston has 6 heritage-listed places on record.
What is the typical lot size in Blakiston?
Across 145 surveyed parcels in Blakiston, the median lot size is about 10,469 m².
Does Blakiston have a train station?
There is no train station inside Blakiston itself. The suburb is served by 1 bus stop.
What is the population of Blakiston?
At the 2021 Census Blakiston had 377 usual residents, with a median age of 46 and an average household size of 3.0 people. The wider Mount Barker statistical area, which contains Blakiston, went from 10,820 people in 2001 to 26,939 in 2025, up 149%.
Is Blakiston an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Blakiston scores 1070 and sits in decile 9 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 Blakiston?
Median household income in Blakiston was $2,600 a week at the 2021 Census, against $1,812 for the typical suburb in Mount Barker District Council. Median rent was $550 a week and the median mortgage repayment $2,134 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Littlehampton | 2.2 km | 0% | 100% |
| Mount Barker Junction | 2.4 km | 0% | 100% |
| Nairne | 2.4 km | 0% | 100% |
| Totness | 4.0 km | 0% | 100% |
| Hay Valley | 4.1 km | 0% | 100% |
| Mount Barker Summit | 4.6 km | 0% | 100% |
| Mount Barker | 5.0 km | 6% | 100% |
| Dawesley | 6.0 km | 0% | 100% |
| Mount Barker Springs | 6.3 km | 0% | 100% |
| Paechtown | 6.4 km | 0% | 100% |