St Clair zoning & planning overlays
A planning-constraint profile of St Clair
(Singleton, NSW) - 40.88 km², mapped from live council and
state overlay data. This suburb is highly constrained on the overlays we could measure - no flood mapping covers this suburb, so this is not a suburb-wide verdict.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
40.88 km² - this suburb is highly constrained on the overlays we could measure - no flood mapping covers this suburb, so this is not a suburb-wide verdict.
Elevation hillshade with street names, clipped to St Clair's boundary, with the bushfire and environmental overlays drawn on top. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft. No flood layer is drawn because we hold no flood mapping for this area.
Nearby suburbs, nearest first
Aircraft noise and flight paths over St Clair
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 2 Oct 2026
Night movements: observed, lowest 6,000 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.
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 40.88 km², St Clair is highly constrained by the planning overlays we hold. We hold no flood mapping covering this suburb, so no flood figure is shown - that is a gap in our data, not an all-clear. Of what is mapped, 82% is flagged bushfire-prone. The dominant land-use zone is Rural Landscape. The median lot measures about 168,848 m² across 42 parcels.
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 967, and decile 4 within New South Wales. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Singleton Surrounds, 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.
4,684 in 2001 to 5,523 in 2025, up 18%.
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.
St Clair data sources and coverage
“Not mapped” means we hold no source layer for this suburb - never an all-clear.
| Dataset | Coverage | Publisher |
|---|---|---|
| Flood mapping | Not 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 |
| Aircraft noise contours (ANEF) | Not held | NSW Government spatial services, NSW ePlanning and published council flood studies, 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 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.
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 St Clair lot.
See what's in the $9 report →St Clair planning - frequently asked
Is St Clair flood-prone?
We don't yet hold flood mapping covering St Clair, so this page can't say how much of the suburb is flood-affected - that is a gap in our data, not an indication that the suburb is free of flood risk. Singleton is the authority to check for flood mapping in this area.
Is St Clair bushfire-prone?
Around 82% of St Clair is mapped as bushfire-prone, compared with a Singleton average of 81%.
Is St Clair under a flight path?
Aircraft were observed over about 14% of St Clair in the period sampled, but only above 3,000 ft - the lowest measured was 6,000 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 St Clair?
The dominant planning zone in St Clair is Rural Landscape, though the suburb also includes Primary Production and Recreational Waterways.
Does St Clair have heritage-listed places?
No heritage-listed places are on record within St Clair.
What is the typical lot size in St Clair?
Across 42 surveyed parcels in St Clair, the median lot size is about 168,848 m². There are also 3 registered easements mapped in the suburb.
Does St Clair have a train station?
There is no train station inside St Clair itself. The suburb is served by 4 bus stops.
Is St Clair an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), St Clair scores 967 and sits in decile 4 of 10 nationally and decile 4 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Mount Olive | 6.5 km | Not mapped | 100% |
| Greenlands | 8.3 km | Not mapped | 100% |
| Carrowbrook | 8.8 km | Not mapped | 95% |
| Westbrook | 9.0 km | Not mapped | 100% |
| Goorangoola | 10.2 km | Not mapped | 100% |
| Mirannie | 11.1 km | Not mapped | 100% |
| Bridgman | 12.1 km | Not mapped | 97% |
| Reedy Creek | 13.3 km | Not mapped | 100% |
| Falbrook | 13.6 km | Not mapped | 87% |
| Middle Falbrook | 14.2 km | Not mapped | 89% |