Koolkhan flood map & planning overlays
A planning-constraint profile of Koolkhan
(Clarence Valley, NSW) - 1.87 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
1.87 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Koolkhan's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Koolkhan
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.
Koolkhan at a glance
How Koolkhan is zoned
Buying in Koolkhan? 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 1.87 km², Koolkhan is highly constrained by planning overlays. About 18% of the suburb sits within a mapped flood overlay, and 73% is flagged bushfire-prone. The dominant land-use zone is General Industrial. The median lot measures about 1,002 m² across 100 parcels.
Who lives in Koolkhan
Census 2021 figures published by the ABS for the Koolkhan 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 921, and decile 2 within New South Wales. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Grafton, the wider ABS statistical area containing Koolkhan. There is no annual population series published at suburb level, so this describes the surrounding area rather than Koolkhan itself.
18,513 in 2001 to 19,905 in 2025, up 8%.
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.
Koolkhan 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 Koolkhan 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 Koolkhan lot.
See what's in the $9 report →Koolkhan planning - frequently asked
Is Koolkhan flood-prone?
About 18% of Koolkhan falls within a mapped flood overlay, against the council-wide suburb average of 24%.
Is Koolkhan bushfire-prone?
Around 73% of Koolkhan is mapped as bushfire-prone, compared with a Clarence Valley average of 94%.
Is Koolkhan under a flight path?
No aircraft were observed over Koolkhan 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 Koolkhan?
The dominant planning zone in Koolkhan is General Industrial, though the suburb also includes Primary Production and Recreational Waterways.
Does Koolkhan have heritage-listed places?
No heritage-listed places are on record within Koolkhan.
What is the typical lot size in Koolkhan?
Across 100 surveyed parcels in Koolkhan, the median lot size is about 1,002 m². There are also 7 registered easements mapped in the suburb.
Is Koolkhan an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Koolkhan scores 921 and sits in decile 2 of 10 nationally and decile 2 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 |
|---|---|---|---|
| Crowther Island | 1.2 km | 100% | 52% |
| Seelands | 1.8 km | 16% | 96% |
| Junction Hill | 2.1 km | 57% | 67% |
| Trenayr | 2.7 km | 39% | 92% |
| Mountain View | 3.5 km | 3% | 99% |
| Alumy Creek | 3.7 km | 99% | 100% |
| Carrs Creek | 4.2 km | 96% | 100% |
| Carrs Peninsula | 4.6 km | 100% | 75% |
| Great Marlow | 5.8 km | 99% | 84% |
| The Whiteman | 5.8 km | 0% | 100% |