Cornwallis flood map & planning overlays
A planning-constraint profile of Cornwallis (Hawkesbury, NSW) - 6.81 km², mapped from live council and state overlay data. This suburb is moderately constrained.
Everything below is suburb-wide. Overlays change block to block - see which ones actually touch your lot. The map is free.
Constraint readout
6.81 km² - this suburb is moderately constrained by planning overlays.
Elevation hillshade with street names, clipped to Cornwallis'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.
Cornwallis at a glance
How Cornwallis is zoned
Buying in Cornwallis? 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 6.81 km², Cornwallis is moderately constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 22% is flagged bushfire-prone. There are 2 heritage-listed sites on record, and the dominant land-use zone is Rural Landscape. The median lot measures about 100,936 m² across 55 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 Cornwallis
Census 2021 figures published by the ABS for the Cornwallis 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 1016, and decile 7 within New South Wales. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Richmond - Clarendon, the wider ABS statistical area containing Cornwallis. There is no annual population series published at suburb level, so this describes the surrounding area rather than Cornwallis itself.
13,660 in 2001 to 16,743 in 2025, up 23%.
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.
Cornwallis 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 Cornwallis 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 →Cornwallis planning - frequently asked
Where can I see a flood map of Cornwallis?
The schematic on this page is a Cornwallis 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 Cornwallis address and it shows the flood, zoning and bushfire mapping on the exact lot boundary.
Is Cornwallis flood-prone?
Flood mapping covers Cornwallis and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 1%). Flood overlays vary block to block, so whether a particular lot is affected needs a property-level check.
Is Cornwallis bushfire-prone?
Yes - around 22% of Cornwallis is mapped as bushfire-prone, compared with a Hawkesbury average of 84%. A bushfire-prone designation can trigger additional building requirements, so check the specific address.
What is the zoning in Cornwallis?
The dominant planning zone in Cornwallis is Rural Landscape, though the suburb also includes Natural Waterways and Environmental Conservation. Zoning sets what you can build and do on a site, and can differ lot by lot.
Does Cornwallis have heritage-listed places?
Cornwallis has 2 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 Cornwallis?
Across 55 surveyed parcels in Cornwallis, the median lot size is about 100,936 m².
Is Cornwallis an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Cornwallis scores 1016 and sits in decile 7 of 10 nationally and decile 7 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.
Do I need a planning report for a Cornwallis property?
A Cornwallis 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 |
|---|---|---|---|
| Freemans Reach | 2.0 km | 0% | 50% |
| Windsor | 2.8 km | 0% | 18% |
| Clarendon | 3.1 km | 0% | 29% |
| Pitt Town Bottoms | 3.4 km | 0% | 18% |
| Richmond | 3.8 km | 0% | 64% |
| Mcgraths Hill | 4.3 km | 0% | 59% |
| Mulgrave | 4.6 km | 0% | 54% |
| South Windsor | 4.8 km | 0% | 54% |
| Richmond Lowlands | 5.6 km | 0% | 89% |
| Bligh Park | 5.8 km | 0% | 24% |