Mount Tomah flood map & planning overlays
A planning-constraint profile of Mount Tomah
(Blue Mountains, NSW) - 30.12 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
30.12 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Mount Tomah's boundary, with the flood, bushfire and environmental overlays drawn on top. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Mount Tomah
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
typical observed square 1 a day
Night movements: observed, lowest 5,000 ft - night is sampled as often as day, but night traffic is light, so this is a floor and no rate can be put on it.
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 Tomah at a glance
How Mount Tomah is zoned
Buying in Mount Tomah? 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 30.12 km², Mount Tomah 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 10 heritage-listed sites on record, and the dominant land-use zone is National Parks and Nature Reserves. The median lot measures about 42,066 m² across 69 parcels.
Who lives in Mount Tomah
Census 2021 figures published by the ABS for the Mount Tomah 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 1055, and decile 8 within New South Wales. The national average is 1000.
Age profile
Share of Mount Tomah's 68 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Blue Mountains - North, the wider ABS statistical area containing Mount Tomah. There is no annual population series published at suburb level, so this describes the surrounding area rather than Mount Tomah itself.
27 in 2001 to 9 in 2025, down 67%.
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.
Mount Tomah 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 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 Mount Tomah 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 Mount Tomah lot.
See what's in the $9 report →Mount Tomah planning - frequently asked
Is Mount Tomah flood-prone?
Flood mapping covers Mount Tomah and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 1%).
Is Mount Tomah bushfire-prone?
Around 100% of Mount Tomah is mapped as bushfire-prone, compared with a Blue Mountains average of 96%.
Is Mount Tomah under a flight path?
Aircraft were observed over about 36% of Mount Tomah in the period sampled, but only above 3,000 ft - the lowest measured was 3,000 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 Mount Tomah?
The dominant planning zone in Mount Tomah is National Parks and Nature Reserves, though the suburb also includes Rural Landscape and Infrastructure.
Does Mount Tomah have heritage-listed places?
Mount Tomah has 10 heritage-listed places on record.
What is the typical lot size in Mount Tomah?
Across 69 surveyed parcels in Mount Tomah, the median lot size is about 42,066 m². There are also 2 registered easements mapped in the suburb.
Does Mount Tomah have a train station?
There is no train station inside Mount Tomah itself. The suburb is served by 2 bus stops.
What is the population of Mount Tomah?
At the 2021 Census Mount Tomah had 68 usual residents, with a median age of 57 and an average household size of 2.1 people. The wider Blue Mountains - North statistical area, which contains Mount Tomah, went from 27 people in 2001 to 9 in 2025, down 67%.
Is Mount Tomah an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Mount Tomah scores 1055 and sits in decile 9 of 10 nationally and decile 8 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Mount Tomah?
Median household income in Mount Tomah was $2,125 a week at the 2021 Census, against $2,083 for the typical suburb in Blue Mountains. Median rent was $370 a week and the median mortgage repayment $2,275 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Berambing Hawkesbury |
3.5 km | 0% | 100% |
| Mount Wilson | 4.5 km | Not mapped | 100% |
| Birrabang | 7.3 km | Not mapped | 100% |
| The Devils Wilderness Hawkesbury |
7.7 km | 0% | 100% |
| Carmarthen | 7.9 km | 0% | 100% |
| Mount Irvine | 8.0 km | 0% | 100% |
| Govetts | 10.6 km | Not mapped | 100% |
| Bell Lithgow City |
11.4 km | Not mapped | 100% |
| Burramoko | 11.9 km | Not mapped | 100% |
| Rocklily Ridge | 13.5 km | 0% | 100% |