Cape Douglas flood map & planning overlays
A planning-constraint profile of Cape Douglas
(Southern Limestone Coast Council, SA) - 28.16 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
28.16 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Cape Douglas's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Cape Douglas at a glance
How Cape Douglas is zoned
Selling in Cape Douglas? 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 28.16 km², Cape Douglas is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 98% is flagged bushfire-prone. The dominant land-use zone is Rural. The median lot measures about 772 m² across 111 parcels.
Who lives in Cape Douglas
Census 2021 figures published by the ABS for the Cape Douglas 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 938, and decile 3 within South Australia. The national average is 1000.
Age profile
Share of Cape Douglas's 68 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Grant, the wider ABS statistical area containing Cape Douglas. There is no annual population series published at suburb level, so this describes the surrounding area rather than Cape Douglas itself.
5,110 in 2001 to 6,505 in 2025, up 27%.
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.
Cape Douglas 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 Cape Douglas 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 Cape Douglas lot.
See what's in the $9 report →Cape Douglas planning - frequently asked
Is Cape Douglas flood-prone?
Flood mapping covers Cape Douglas and none of the suburb falls within a mapped flood overlay.
Is Cape Douglas bushfire-prone?
Around 98% of Cape Douglas is mapped as bushfire-prone, compared with a Southern Limestone Coast Council average of 98%.
What is the zoning in Cape Douglas?
The dominant planning zone in Cape Douglas is Rural, though the suburb also includes Conservation and Coastal Waters and Offshore Islands.
Does Cape Douglas have heritage-listed places?
No heritage-listed places are on record within Cape Douglas.
What is the typical lot size in Cape Douglas?
Across 111 surveyed parcels in Cape Douglas, the median lot size is about 772 m².
What is the population of Cape Douglas?
At the 2021 Census Cape Douglas had 68 usual residents, with a median age of 50 and an average household size of 2.4 people. The wider Grant statistical area, which contains Cape Douglas, went from 5,110 people in 2001 to 6,505 in 2025, up 27%.
Is Cape Douglas an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Cape Douglas scores 938 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 Cape Douglas?
Median household income in Cape Douglas was $1,166 a week at the 2021 Census, against $1,833 for the typical suburb in Southern Limestone Coast Council. Median rent was $110 a week and the median mortgage repayment $1,127 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Nene Valley | 7.7 km | 0% | 98% |
| Allendale East | 8.7 km | 0% | 100% |
| Port Macdonnell | 8.8 km | 0% | 98% |
| Kongorong | 11.4 km | 0% | 100% |
| Mount Schank | 11.7 km | 0% | 100% |
| Racecourse Bay | 13.9 km | 0% | 72% |
| Blackfellows Caves | 14.9 km | 0% | 98% |
| Eight Mile Creek | 17.6 km | 0% | 99% |
| Moorak | 17.6 km | 0% | 100% |
| Pelican Point | 17.7 km | 0% | 84% |