Unanderra flood map & planning overlays
A planning-constraint profile of Unanderra
(Wollongong, NSW) - 6.35 km², mapped from live council and
state overlay data. This suburb is moderately constrained.
Profile updated 26 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
6.35 km² - this suburb is moderately constrained by planning overlays.
Elevation hillshade with street names, clipped to Unanderra'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 Unanderra
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 26 Sep 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.
Unanderra at a glance
How Unanderra is zoned
Buying in Unanderra? 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 6.35 km², Unanderra is moderately constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 17% is flagged bushfire-prone. There are 6 heritage-listed sites on record, and the dominant land-use zone is Low Density Residential. The median lot measures about 669 m² across 2,519 parcels.
Who lives in Unanderra
Census 2021 figures published by the ABS for the Unanderra 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 892, and decile 1 within New South Wales. The national average is 1000.
Age profile
Share of Unanderra's 5,476 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Unanderra - Mount Kembla, the wider ABS statistical area containing Unanderra. There is no annual population series published at suburb level, so this describes the surrounding area rather than Unanderra itself.
16,092 in 2001 to 15,414 in 2025, down 4%.
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.
Unanderra 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 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 Unanderra 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 47% of Unanderra. 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 Unanderra lot.
See what's in the $9 report →Unanderra planning - frequently asked
Is Unanderra flood-prone?
Flood mapping covers Unanderra and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 12%).
Is Unanderra bushfire-prone?
Around 17% of Unanderra is mapped as bushfire-prone, compared with a Wollongong average of 56%.
Is Unanderra under a flight path?
Aircraft were observed below 3,000 ft over about 47% of Unanderra, and over about 70% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 26 Sep 2026). The lowest measured aircraft was at 2,000 ft, with an average of 3,500 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 Unanderra?
The dominant planning zone in Unanderra is Low Density Residential, though the suburb also includes Heavy Industrial and Infrastructure.
Does Unanderra have heritage-listed places?
Unanderra has 6 heritage-listed places on record.
What is the typical lot size in Unanderra?
Across 2,519 surveyed parcels in Unanderra, the median lot size is about 669 m². There are also 22 registered easements mapped in the suburb.
Does Unanderra have a train station?
Yes - Unanderra has 1 train station: Unanderra Station. It is also served by 141 bus stops.
What is the population of Unanderra?
At the 2021 Census Unanderra had 5,476 usual residents, with a median age of 42 and an average household size of 2.4 people. The wider Unanderra - Mount Kembla statistical area, which contains Unanderra, went from 16,092 people in 2001 to 15,414 in 2025, down 4%.
Is Unanderra an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Unanderra scores 892 and sits in decile 2 of 10 nationally and decile 1 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Unanderra?
Median household income in Unanderra was $1,211 a week at the 2021 Census, against $1,912 for the typical suburb in Wollongong. Median rent was $285 a week and the median mortgage repayment $1,950 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Spring Hill | 2.0 km | 10% | 0% |
| Cordeaux Heights | 2.2 km | 0% | 56% |
| Cringila | 2.3 km | 0% | 59% |
| Berkeley | 2.6 km | 29% | 42% |
| Mount Saint Thomas | 2.9 km | 18% | 15% |
| Farmborough Heights | 2.9 km | <1% | 63% |
| Figtree | 3.1 km | 0% | 38% |
| Lake Heights | 3.4 km | 0% | 2% |
| Mangerton | 3.7 km | 9% | 23% |
| Mount Kembla | 3.8 km | 0% | 95% |