Mount Ousley flood map & planning overlays
A planning-constraint profile of Mount Ousley
(Wollongong, NSW) - 0.76 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
0.76 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Mount Ousley'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 Ousley
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.
Mount Ousley at a glance
How Mount Ousley is zoned
Buying in Mount Ousley? 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 0.76 km², Mount Ousley is highly constrained by planning overlays. About 19% of the suburb sits within a mapped flood overlay, and 26% is flagged bushfire-prone. There are 4 heritage-listed sites on record, and the dominant land-use zone is Low Density Residential. The median lot measures about 615 m² across 605 parcels.
Who lives in Mount Ousley
Census 2021 figures published by the ABS for the Mount Ousley 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 1077, and decile 9 within New South Wales. The national average is 1000.
Age profile
Share of Mount Ousley's 1,611 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Balgownie - Fairy Meadow, the wider ABS statistical area containing Mount Ousley. There is no annual population series published at suburb level, so this describes the surrounding area rather than Mount Ousley itself.
19,963 in 2001 to 22,303 in 2025, up 12%.
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 Ousley 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 Ousley 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 54% of Mount Ousley. 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 Ousley lot.
See what's in the $9 report →Mount Ousley planning - frequently asked
Is Mount Ousley flood-prone?
About 19% of Mount Ousley falls within a mapped flood overlay, against the council-wide suburb average of 12%.
Is Mount Ousley bushfire-prone?
Around 26% of Mount Ousley is mapped as bushfire-prone, compared with a Wollongong average of 56%.
Is Mount Ousley under a flight path?
Aircraft were observed below 3,000 ft over about 54% of Mount Ousley, and over about 91% 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 1,000 ft, with an average of 5,500 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 Mount Ousley?
The dominant planning zone in Mount Ousley is Low Density Residential, though the suburb also includes Infrastructure and Public Recreation.
Does Mount Ousley have heritage-listed places?
Mount Ousley has 4 heritage-listed places on record.
What is the typical lot size in Mount Ousley?
Across 605 surveyed parcels in Mount Ousley, the median lot size is about 615 m². There are also 1 registered easements mapped in the suburb.
Does Mount Ousley have a train station?
There is no train station inside Mount Ousley itself. The suburb is served by 14 bus stops.
What is the population of Mount Ousley?
At the 2021 Census Mount Ousley had 1,611 usual residents, with a median age of 42 and an average household size of 2.8 people. The wider Balgownie - Fairy Meadow statistical area, which contains Mount Ousley, went from 19,963 people in 2001 to 22,303 in 2025, up 12%.
Is Mount Ousley an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Mount Ousley scores 1077 and sits in decile 10 of 10 nationally and decile 9 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Mount Ousley?
Median household income in Mount Ousley was $2,293 a week at the 2021 Census, against $1,912 for the typical suburb in Wollongong. Median rent was $500 a week and the median mortgage repayment $2,450 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Mount Pleasant | 1.1 km | 16% | 76% |
| Fairy Meadow | 1.1 km | 50% | 1% |
| Keiraville | 1.2 km | 26% | 25% |
| Gwynneville | 1.6 km | 28% | 7% |
| Balgownie | 1.7 km | 22% | 51% |
| North Wollongong | 1.8 km | 64% | 33% |
| Fernhill | 2.1 km | 8% | <1% |
| Mount Keira | 2.4 km | 3% | 93% |
| Tarrawanna | 2.7 km | 8% | 71% |
| West Wollongong | 2.9 km | 8% | 4% |