Coalcliff flood map & planning overlays
A planning-constraint profile of Coalcliff
(Wollongong, NSW) - 1.79 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
1.79 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Coalcliff'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 Coalcliff
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: 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.
Coalcliff at a glance
How Coalcliff is zoned
Buying in Coalcliff? 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 1.79 km², Coalcliff is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 96% is flagged bushfire-prone. There are 6 heritage-listed sites on record, and the dominant land-use zone is Environmental Conservation. The median lot measures about 847 m² across 138 parcels.
Who lives in Coalcliff
Census 2021 figures published by the ABS for the Coalcliff 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 1135, and decile 10 within New South Wales. The national average is 1000.
Age profile
Share of Coalcliff's 212 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Thirroul - Austinmer - Coalcliff, the wider ABS statistical area containing Coalcliff. There is no annual population series published at suburb level, so this describes the surrounding area rather than Coalcliff itself.
10,592 in 2001 to 12,148 in 2025, up 15%.
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.
Coalcliff 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 Coalcliff 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.
Aircraft have been seen below 3,000 ft over about 69% of Coalcliff. 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 Coalcliff lot.
See what's in the $9 report →Coalcliff planning - frequently asked
Is Coalcliff flood-prone?
Flood mapping covers Coalcliff and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 12%).
Is Coalcliff bushfire-prone?
Around 96% of Coalcliff is mapped as bushfire-prone, compared with a Wollongong average of 56%.
Is Coalcliff under a flight path?
Aircraft were observed below 3,000 ft over about 69% of Coalcliff, and over about 81% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 2 Oct 2026). The lowest measured aircraft was at 500 ft, with an average of 3,000 ft. At the busiest point in the suburb about 1 aircraft a day were recorded passing over one 500 m square. 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 Coalcliff?
The dominant planning zone in Coalcliff is Environmental Conservation, though the suburb also includes National Parks and Nature Reserves and Primary Production.
Does Coalcliff have heritage-listed places?
Coalcliff has 6 heritage-listed places on record.
What is the typical lot size in Coalcliff?
Across 138 surveyed parcels in Coalcliff, the median lot size is about 847 m². There are also 1 registered easements mapped in the suburb.
Does Coalcliff have a train station?
Yes - Coalcliff has 1 train station: Coalcliff Station. It is also served by 9 bus stops.
What is the population of Coalcliff?
At the 2021 Census Coalcliff had 212 usual residents, with a median age of 47 and an average household size of 2.8 people. The wider Thirroul - Austinmer - Coalcliff statistical area, which contains Coalcliff, went from 10,592 people in 2001 to 12,148 in 2025, up 15%.
Is Coalcliff an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Coalcliff scores 1135 and sits in decile 10 of 10 nationally and decile 10 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Coalcliff?
Median household income in Coalcliff was $3,299 a week at the 2021 Census, against $1,912 for the typical suburb in Wollongong. Median rent was $640 a week and the median mortgage repayment $3,000 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Clifton | 1.5 km | 0% | 96% |
| Stanwell Park | 1.9 km | 0% | 87% |
| Scarborough | 2.7 km | 0% | 91% |
| Stanwell Tops | 2.9 km | 0% | 100% |
| Wombarra | 4.0 km | 0% | 76% |
| Maddens Plains | 4.0 km | 0% | 99% |
| Otford | 5.2 km | 0% | 99% |
| Darkes Forest | 5.3 km | 0% | 98% |
| Coledale | 5.5 km | 0% | 71% |
| Helensburgh | 7.3 km | 0% | 92% |