Twenty Forests zoning & planning overlays
A planning-constraint profile of Twenty Forests
(Oberon, NSW) - 8.87 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
8.87 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 Twenty Forests'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 Twenty Forests
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: 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.
Twenty Forests at a glance
How Twenty Forests is zoned
Buying in Twenty Forests? 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 8.87 km², Twenty Forests 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, 100% is flagged bushfire-prone. The dominant land-use zone is Primary Production. The median lot measures about 406,501 m² across 22 parcels.
Twenty Forests 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 | Not 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 Twenty Forests 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 Twenty Forests lot.
See what's in the $9 report →Twenty Forests planning - frequently asked
Is Twenty Forests flood-prone?
We don't yet hold flood mapping covering Twenty Forests, 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. Oberon is the authority to check for flood mapping in this area.
Is Twenty Forests bushfire-prone?
Around 100% of Twenty Forests is mapped as bushfire-prone, compared with a Oberon average of 100%.
Is Twenty Forests under a flight path?
Aircraft were observed over about 22% of Twenty Forests 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 Twenty Forests?
The dominant planning zone in Twenty Forests is Primary Production, though the suburb also includes Forestry.
Does Twenty Forests have heritage-listed places?
No heritage-listed places are on record within Twenty Forests.
What is the typical lot size in Twenty Forests?
Across 22 surveyed parcels in Twenty Forests, the median lot size is about 406,501 m².
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Mayfield | 3.1 km | Not mapped | 96% |
| Wisemans Creek | 5.0 km | 0% | 99% |
| Essington | 8.2 km | 0% | 100% |
| Oberon | 9.1 km | Not mapped | 95% |
| Charlton | 9.5 km | 0% | 100% |
| Norway | 11.5 km | Not mapped | 100% |
| Tannas Mount Bathurst Regional |
12.1 km | 0% | 98% |
| O'Connell | 13.5 km | 0% | 100% |
| Hazelgrove | 13.7 km | Not mapped | 100% |
| Dog Rocks | 15.8 km | 0% | 100% |