St Clair flood map & planning overlays
A planning-constraint profile of St Clair (Penrith, NSW) - 7.18 km², mapped from live council and state overlay data. This suburb is relatively unconstrained.
Everything below is suburb-wide. Overlays change block to block - see which ones actually touch your lot. The map is free.
Constraint readout
7.18 km² - this suburb is relatively unconstrained by planning overlays.
Elevation hillshade with street names, clipped to St Clair'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 Clair at a glance
How St Clair is zoned
Buying in St Clair? The zoning, flood and bushfire lines on the section 10.7 certificate attached to the contract are mapped controls - see our s10.7 certificate guide.
Across its 7.18 km², St Clair is relatively unconstrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 2% is flagged bushfire-prone. The dominant land-use zone is Low Density Residential. The median lot measures about 631 m² across 6,525 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.
Who lives in St Clair
Census 2021 figures published by the ABS for the St Clair 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 976, and decile 4 within New South Wales. The national average is 1000.
Age profile
Share of St Clair's 19,942 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of St Clair, the wider ABS statistical area containing St Clair. There is no annual population series published at suburb level, so this describes the surrounding area rather than St Clair itself.
21,498 in 2001 to 20,529 in 2025, down 5%.
Source: Australian Bureau of Statistics. Census of Population and Housing 2021 (General Community Profile) and SEIFA 2021, both published at the Suburbs and Localities level; Regional Population (estimated resident population) at Statistical Area Level 2. Used under CC BY 4.0. Census counts of small populations are randomly adjusted by the ABS to protect confidentiality, so figures for small suburbs are indicative.
St Clair 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 | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Bushfire-prone mapping | Mapped | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Zoning | Mapped | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Heritage and environment | Mapped where published | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 5 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 Clair 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 Clair planning - frequently asked
Where can I see a flood map of St Clair?
The schematic on this page is a St Clair flood map: the mapped flood overlays drawn over the suburb's terrain and street grid. Flood lines vary block to block, so for a specific property use the free interactive map - search any St Clair address and it shows the flood, zoning and bushfire mapping on the exact lot boundary.
Is St Clair flood-prone?
Flood mapping covers St Clair and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 0%). Flood overlays vary block to block, so whether a particular lot is affected needs a property-level check.
Is St Clair bushfire-prone?
Yes - around 2% of St Clair is mapped as bushfire-prone, compared with a Penrith average of 42%. A bushfire-prone designation can trigger additional building requirements, so check the specific address.
What is the zoning in St Clair?
The dominant planning zone in St Clair is Low Density Residential, though the suburb also includes Public Recreation and Infrastructure. Zoning sets what you can build and do on a site, and can differ lot by lot.
Does St Clair have heritage-listed places?
No heritage-listed places are on record within St Clair. Even so, it is worth confirming for an individual property before any works.
What is the typical lot size in St Clair?
Across 6,525 surveyed parcels in St Clair, the median lot size is about 631 m². There are also 1 registered easements mapped in the suburb - an easement can restrict where you can build, so always check the title and overlays for the specific lot.
Does St Clair have a train station?
There is no train station inside St Clair itself. The suburb is served by 165 bus stops.
What is the population of St Clair?
At the 2021 Census St Clair had 19,942 usual residents, with a median age of 36 and an average household size of 3.0 people. The wider St Clair statistical area, which contains St Clair, went from 21,498 people in 2001 to 20,529 in 2025, down 5%. ABS publishes no annual population series for individual suburbs, so that trend describes the surrounding area rather than St Clair alone.
Is St Clair an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), St Clair scores 976 and sits in decile 5 of 10 nationally and decile 4 within New South Wales - decile 1 being the most disadvantaged tenth of Australian suburbs and decile 10 the least. The national average score is 1000. SEIFA summarises income, education, occupation and housing across the whole suburb, so it describes the area, not any particular household in it.
What is the median household income in St Clair?
Median household income in St Clair was $2,067 a week at the 2021 Census, against $2,067 for the typical suburb in Penrith. Median rent was $440 a week and the median mortgage repayment $2,167 a month. These are 2021 Census figures and have not been indexed to today.
Do I need a planning report for a St Clair property?
A St Clair 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 |
|---|---|---|---|
| Erskine Park | 1.8 km | 0% | 22% |
| Colyton | 1.9 km | 0% | 18% |
| Oxley Park | 3.1 km | 0% | 23% |
| Minchinbury Blacktown |
4.1 km | 0% | 9% |
| Claremont Meadows | 4.2 km | 0% | 33% |
| Mount Druitt Blacktown |
4.2 km | 0% | 16% |
| Whalan Blacktown |
4.9 km | 0% | 7% |
| North St Marys | 4.9 km | 0% | 38% |
| Orchard Hills | 5.0 km | 0% | 85% |
| Caddens | 5.4 km | 0% | 19% |