Calca flood map & planning overlays
A planning-constraint profile of Calca
(The District Council of Streaky Bay, SA) - 121.3 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 8 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
121.3 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Calca's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Calca at a glance
How Calca is zoned
Selling in Calca? 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 121.3 km², Calca 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. The dominant land-use zone is Rural. The median lot measures about 1,336,847 m² across 83 parcels.
Who lives in Calca
Census 2021 figures published by the ABS for the Calca 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 971, and decile 5 within South Australia. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of West Coast (SA), the wider ABS statistical area containing Calca. There is no annual population series published at suburb level, so this describes the surrounding area rather than Calca itself.
3,437 in 2001 to 3,895 in 2025, up 13%.
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.
Calca 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 | Watched, not yet sampled here | adsb.lol, under the Open Database License |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 8 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 Calca 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.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Calca lot.
See what's in the $9 report →Calca planning - frequently asked
Is Calca flood-prone?
Flood mapping covers Calca and none of the suburb falls within a mapped flood overlay.
Is Calca bushfire-prone?
Around 99% of Calca is mapped as bushfire-prone, compared with a The District Council of Streaky Bay average of 98%.
What is the zoning in Calca?
The dominant planning zone in Calca is Rural, though the suburb also includes Conservation and Coastal Waters and Offshore Islands.
Does Calca have heritage-listed places?
No heritage-listed places are on record within Calca.
What is the typical lot size in Calca?
Across 83 surveyed parcels in Calca, the median lot size is about 1,336,847 m².
Is Calca an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Calca scores 971 and sits in decile 5 of 10 nationally and decile 5 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Sceale Bay | 9.0 km | 0% | 95% |
| Baird Bay | 11.0 km | 0% | 91% |
| Mortana | 11.6 km | 0% | 100% |
| Tyringa | 11.7 km | 0% | 99% |
| Yanerbie | 15.3 km | 0% | 99% |
| Witera | 22.2 km | 0% | 94% |
| Maryvale | 23.0 km | 0% | 100% |
| Streaky Bay | 25.4 km | 0% | 97% |
| Colley | 28.2 km | 0% | 100% |
| Westall | 28.9 km | 0% | 94% |
See all The District Council of Streaky Bay suburb profiles →