Mount Marsh flood map & planning overlays
A planning-constraint profile of Mount Marsh
(Richmond Valley, NSW) - 144.03 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
144.03 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Mount Marsh's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Mount Marsh
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.
Mount Marsh at a glance
How Mount Marsh is zoned
Buying in Mount Marsh? 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 144.03 km², Mount Marsh 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 are 42 heritage-listed sites on record, and the dominant land-use zone is Primary Production. The median lot measures about 489,016 m² across 67 parcels.
Mount Marsh 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 | Not 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 Mount Marsh 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 Mount Marsh lot.
See what's in the $9 report →Mount Marsh planning - frequently asked
Is Mount Marsh flood-prone?
Flood mapping covers Mount Marsh and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 4%).
Is Mount Marsh bushfire-prone?
Around 100% of Mount Marsh is mapped as bushfire-prone, compared with a Richmond Valley average of 97%.
Is Mount Marsh under a flight path?
No aircraft were observed over Mount Marsh 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 Mount Marsh?
The dominant planning zone in Mount Marsh is Primary Production, though the suburb also includes National Parks and Nature Reserves and Forestry.
Does Mount Marsh have heritage-listed places?
Mount Marsh has 42 heritage-listed places on record.
What is the typical lot size in Mount Marsh?
Across 67 surveyed parcels in Mount Marsh, the median lot size is about 489,016 m².
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Camira | 7.2 km | Not mapped | 100% |
| Six Mile Swamp | 9.3 km | Not mapped | 100% |
| Whiporie | 11.3 km | 0% | 100% |
| Clearfield | 13.1 km | Not mapped | 100% |
| Upper Fine Flower Clarence Valley |
14.1 km | 0% | 100% |
| Banyabba Clarence Valley |
14.8 km | 0% | 100% |
| Coaldale Clarence Valley |
15.6 km | 0% | 100% |
| Kippenduff | 15.8 km | 0% | 100% |
| Barretts Creek Clarence Valley |
17.5 km | 0% | 100% |
| Myrtle Creek | 18.5 km | Not mapped | 100% |