Blackheath zoning & planning overlays
A planning-constraint profile of Blackheath
(Blue Mountains, NSW) - 45.54 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
45.54 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 Blackheath'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 Blackheath
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 6,000 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.
Blackheath at a glance
How Blackheath is zoned
Buying in Blackheath? 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 45.54 km², Blackheath 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, 94% is flagged bushfire-prone. There are 164 heritage-listed sites on record, and the dominant land-use zone is Environmental Conservation. The median lot measures about 767 m² across 4,685 parcels.
Who lives in Blackheath
Census 2021 figures published by the ABS for the Blackheath 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 1011, and decile 6 within New South Wales. The national average is 1000.
Age profile
Share of Blackheath's 4,672 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Blackheath - Megalong Valley, the wider ABS statistical area containing Blackheath. There is no annual population series published at suburb level, so this describes the surrounding area rather than Blackheath itself.
5,285 in 2001 to 5,872 in 2025, up 11%.
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.
Blackheath 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 | 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 Blackheath 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 Blackheath lot.
See what's in the $9 report →Blackheath planning - frequently asked
Is Blackheath flood-prone?
We don't yet hold flood mapping covering Blackheath, 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. Blue Mountains is the authority to check for flood mapping in this area.
Is Blackheath bushfire-prone?
Around 94% of Blackheath is mapped as bushfire-prone, compared with a Blue Mountains average of 96%.
Is Blackheath under a flight path?
Aircraft were observed over about 79% of Blackheath 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 Blackheath?
The dominant planning zone in Blackheath is Environmental Conservation, though the suburb also includes National Parks and Nature Reserves and Environmental Living.
Does Blackheath have heritage-listed places?
Blackheath has 164 heritage-listed places on record.
What is the typical lot size in Blackheath?
Across 4,685 surveyed parcels in Blackheath, the median lot size is about 767 m². There are also 6 registered easements mapped in the suburb.
Does Blackheath have a train station?
Yes - Blackheath has 1 train station: Blackheath Station. It is also served by 159 bus stops.
What is the population of Blackheath?
At the 2021 Census Blackheath had 4,672 usual residents, with a median age of 53 and an average household size of 2.0 people. The wider Blackheath - Megalong Valley statistical area, which contains Blackheath, went from 5,285 people in 2001 to 5,872 in 2025, up 11%.
Is Blackheath an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Blackheath scores 1011 and sits in decile 7 of 10 nationally and decile 6 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Blackheath?
Median household income in Blackheath was $1,332 a week at the 2021 Census, against $2,083 for the typical suburb in Blue Mountains. Median rent was $380 a week and the median mortgage repayment $1,733 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Medlow Bath | 4.5 km | Not mapped | 99% |
| Burramoko | 4.6 km | Not mapped | 100% |
| Govetts | 5.6 km | Not mapped | 100% |
| Mount Victoria | 7.0 km | Not mapped | 99% |
| Kanimbla Lithgow City |
7.6 km | Not mapped | 100% |
| Katoomba | 8.1 km | <1% | 83% |
| Birrabang | 8.4 km | Not mapped | 100% |
| Leura | 9.3 km | 1% | 82% |
| Rocklily Ridge | 10.2 km | 0% | 100% |
| Little Hartley Lithgow City |
11.0 km | Not mapped | 83% |