Osterley flood map & planning overlays
A planning-constraint profile of Osterley
(Port Stephens, NSW) - 3.68 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
3.68 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Osterley'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 Osterley
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
Night movements: observed, lowest 4,000 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.
Osterley at a glance
How Osterley is zoned
Buying in Osterley? 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 3.68 km², Osterley is highly constrained by planning overlays. About 55% of the suburb sits within a mapped flood overlay, and 99% is flagged bushfire-prone. The dominant land-use zone is Primary Production. The median lot measures about 8,689 m² across 57 parcels.
Who lives in Osterley
Census 2021 figures published by the ABS for the Osterley 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 1019, and decile 7 within New South Wales. The national average is 1000.
Age profile
Share of Osterley's 132 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Seaham - Woodville, the wider ABS statistical area containing Osterley. There is no annual population series published at suburb level, so this describes the surrounding area rather than Osterley itself.
4,443 in 2001 to 5,899 in 2025, up 33%.
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.
Osterley 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 Osterley 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 Osterley lot.
See what's in the $9 report →Osterley planning - frequently asked
Is Osterley flood-prone?
About 55% of Osterley falls within a mapped flood overlay, against the council-wide suburb average of 45%.
Is Osterley bushfire-prone?
Around 99% of Osterley is mapped as bushfire-prone, compared with a Port Stephens average of 82%.
Is Osterley under a flight path?
Aircraft were observed over about 21% of Osterley in the period sampled, but only above 3,000 ft - the lowest measured was 2,500 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 Osterley?
The dominant planning zone in Osterley is Primary Production, though the suburb also includes Recreational Waterways and Special Activities.
Does Osterley have heritage-listed places?
No heritage-listed places are on record within Osterley.
What is the typical lot size in Osterley?
Across 57 surveyed parcels in Osterley, the median lot size is about 8,689 m². There are also 3 registered easements mapped in the suburb.
Does Osterley have a train station?
There is no train station inside Osterley itself. The suburb is served by 4 bus stops.
What is the population of Osterley?
At the 2021 Census Osterley had 132 usual residents, with a median age of 47 and an average household size of 3.2 people. The wider Seaham - Woodville statistical area, which contains Osterley, went from 4,443 people in 2001 to 5,899 in 2025, up 33%.
Is Osterley an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Osterley scores 1019 and sits in decile 7 of 10 nationally and decile 7 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Osterley?
Median household income in Osterley was $2,562 a week at the 2021 Census, against $1,421 for the typical suburb in Port Stephens. Median rent was $400 a week and the median mortgage repayment $2,015 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Nelsons Plains | 2.2 km | 71% | 98% |
| Duckenfield Maitland |
2.4 km | 45% | 99% |
| Hinton | 3.1 km | 84% | 92% |
| Millers Forest Maitland |
3.9 km | 97% | 95% |
| Brandy Hill | 4.0 km | 39% | 100% |
| Berry Park Maitland |
4.3 km | 75% | 95% |
| Seaham | 5.9 km | 48% | 97% |
| Wallalong | 6.6 km | 64% | 87% |
| Phoenix Park Maitland |
6.6 km | 100% | 99% |
| Raymond Terrace | 6.7 km | 54% | 76% |