Carnham flood map & planning overlays
A planning-constraint profile of Carnham
(Clarence Valley, NSW) - 63.53 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 26 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
63.53 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Carnham's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Carnham
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 to
Night movements: not established - night is sampled as often as day, but too few night flights have been seen here to conclude either way.
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.
Carnham at a glance
How Carnham is zoned
Buying in Carnham? 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 63.53 km², Carnham is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 100% is flagged bushfire-prone. There is 1 heritage-listed site on record, and the dominant land-use zone is Rural Landscape. The median lot measures about 312,624 m² across 54 parcels.
Who lives in Carnham
Census 2021 figures published by the ABS for the Carnham 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 952, and decile 3 within New South Wales. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Grafton Surrounds, the wider ABS statistical area containing Carnham. There is no annual population series published at suburb level, so this describes the surrounding area rather than Carnham itself.
14,917 in 2001 to 18,099 in 2025, up 21%.
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.
Carnham 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 | 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 26 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 Carnham 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 Carnham lot.
See what's in the $9 report →Carnham planning - frequently asked
Is Carnham flood-prone?
Flood mapping covers Carnham and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 24%).
Is Carnham bushfire-prone?
Around 100% of Carnham is mapped as bushfire-prone, compared with a Clarence Valley average of 94%.
Is Carnham under a flight path?
No aircraft were observed over Carnham in the period sampled (recent weeks to now). Sampling is intermittent, so that is a floor rather than proof that none fly over. 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 Carnham?
The dominant planning zone in Carnham is Rural Landscape, though the suburb also includes Primary Production and Natural Waterways.
Does Carnham have heritage-listed places?
Carnham has 1 heritage-listed place on record.
What is the typical lot size in Carnham?
Across 54 surveyed parcels in Carnham, the median lot size is about 312,624 m². There are also 1 registered easements mapped in the suburb.
Is Carnham an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Carnham scores 952 and sits in decile 4 of 10 nationally and decile 3 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 |
|---|---|---|---|
| Dumbudgery | 7.2 km | 0% | 100% |
| Eighteen Mile | 7.7 km | 0% | 100% |
| Heifer Station | 10.4 km | 0% | 100% |
| Fine Flower | 10.4 km | 0% | 100% |
| Coombadjha | 10.8 km | 0% | 100% |
| Collum Collum | 13.4 km | 0% | 100% |
| Baryulgil | 14.5 km | 0% | 100% |
| Pulganbar | 16.1 km | 0% | 100% |
| Barretts Creek | 17.0 km | 0% | 100% |
| Upper Fine Flower | 17.7 km | 0% | 100% |