St Johns flood map & planning overlays
A planning-constraint profile of St Johns (Light Regional Council, SA) - 17.26 km², mapped from live council and state overlay data. This suburb is highly constrained.
Everything below is suburb-wide. Overlays change block to block - see which ones actually touch your lot. The map is free.
Constraint readout
17.26 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to St Johns's boundary, with the flood, bushfire and environmental overlays drawn on top. It shows where constraints fall; the interactive map shows them on your exact address.
St Johns at a glance
How St Johns is zoned
Selling in St Johns? The zone and overlays on this page are the Planning and Design Code controls a Form 1 vendor's statement has to disclose - a $9 planning report pulls them at the lot level for any St Johns address.
Across its 17.26 km², St Johns is highly constrained by planning overlays. About 100% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. There are 3 heritage-listed sites on record, and the dominant land-use zone is Rural. The median lot measures about 330,638 m² across 45 parcels. These figures are suburb-wide - the overlays that actually apply to a given lot can differ block to block, which is what a property-level check tells you.
St Johns data sources and coverage
Every figure below is an aggregate for the suburb boundary. “Not mapped” means LayeredGeo does not hold a source layer covering this suburb; it is never an all-clear for a particular property.
| 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 |
| Demographics | Not available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 20 August 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 St Johns 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.
See what's in the $9 report →St Johns planning - frequently asked
Where can I see a flood map of St Johns?
The schematic on this page is a St Johns flood map: the mapped flood overlays drawn over the suburb's terrain and street grid, covering about 100% of the suburb. Flood lines vary block to block, so for a specific property use the free interactive map - search any St Johns address and it shows the flood, zoning and bushfire mapping on the exact lot boundary.
Is St Johns flood-prone?
About 100% of St Johns falls within a mapped flood overlay, against the council-wide suburb average of 94%. Flood overlays vary block to block, so whether a particular lot is affected needs a property-level check.
Is St Johns bushfire-prone?
Yes - around 100% of St Johns is mapped as bushfire-prone, compared with a Light Regional Council average of 100%. A bushfire-prone designation can trigger additional building requirements, so check the specific address.
What is the zoning in St Johns?
The dominant planning zone in St Johns is Rural. Zoning sets what you can build and do on a site, and can differ lot by lot.
Does St Johns have heritage-listed places?
St Johns has 3 heritage-listed places on record. Heritage listing affects what you can alter or demolish, so confirm whether a specific property is listed or near a heritage place.
What is the typical lot size in St Johns?
Across 45 surveyed parcels in St Johns, the median lot size is about 330,638 m².
Do I need a planning report for a St Johns property?
A St Johns planning report pulls every overlay - zoning, flood, bushfire, heritage and environmental - that touches a single lot, on live council and state data. The interactive map preview is free; a full PDF report is $9.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Moppa | 4.4 km | 100% | 100% |
| Koonunga | 6.3 km | 100% | 100% |
| Kapunda | 6.6 km | 81% | 100% |
| Fords | 7.1 km | 100% | 100% |
| Greenock | 7.1 km | 88% | 100% |
| Ebenezer | 7.9 km | 100% | 100% |
| Nain | 9.2 km | 100% | 100% |
| Bagot Well | 9.5 km | 100% | 100% |
| Nuriootpa The Barossa Council |
10.4 km | 100% | 97% |
| Allendale North | 11.1 km | 100% | 100% |