Duffy flood map & planning overlays
A planning-constraint profile of Duffy
(Weston Creek, ACT) - 2.8 km², mapped from live district and
state overlay data. This suburb is highly constrained.
Profile updated 26 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
2.8 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Duffy'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 Duffy
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
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.
Duffy at a glance
How Duffy is zoned
Buying in Duffy? The Territory Plan zone on this page sits alongside the Crown lease, which sets what a block may actually be used for.
Across its 2.8 km², Duffy is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 49% is flagged bushfire-prone. There are 33 heritage-listed sites on record, and the dominant land-use zone is Suburban. The median lot measures about 806 m² across 1,170 parcels.
Who lives in Duffy
Census 2021 figures published by the ABS for the Duffy 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 1108, and decile 7 within the Australian Capital Territory. The national average is 1000.
Age profile
Share of Duffy's 3,395 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Duffy, the wider ABS statistical area containing Duffy. There is no annual population series published at suburb level, so this describes the surrounding area rather than Duffy itself.
3,239 in 2001 to 3,514 in 2025, up 8%.
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.
Duffy 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 | the ACT Territory Plan and ACT Government spatial data |
| Bushfire-prone mapping | Mapped | the ACT Territory Plan and ACT Government spatial data |
| Zoning | Mapped | the ACT Territory Plan and ACT Government spatial data |
| Heritage and environment | Mapped where published | the ACT Territory Plan and ACT Government spatial data |
| Aircraft noise contours (ANEF) | Not held | the ACT Territory Plan and ACT Government spatial data, 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 Duffy 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.
Published flood models are held over parts of Duffy. The free check tells you whether one reaches an address; where it does, a Flood Model Report is +$9 with the planning report.
See what's in the $9 report →Duffy planning - frequently asked
Is Duffy flood-prone?
Flood mapping covers Duffy and less than 1% of the suburb falls within a mapped flood overlay (the district-wide suburb average is 1%). Published flood models are held over parts of Duffy; the free check on the Flood Model Report page says whether one reaches a given address.
Is Duffy bushfire-prone?
Around 49% of Duffy is mapped as bushfire-prone, compared with a Weston Creek average of 22%.
Is Duffy under a flight path?
Aircraft were observed over about 29% of Duffy 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 Duffy?
The dominant planning zone in Duffy is Suburban, though the suburb also includes Hills, Ridges and Buffer Areas and Designated.
Does Duffy have heritage-listed places?
Duffy has 33 heritage-listed places on record.
What is the typical lot size in Duffy?
Across 1,170 surveyed parcels in Duffy, the median lot size is about 806 m². There are also 2,094 registered easements mapped in the suburb.
Does Duffy have a train station?
There is no train station inside Duffy itself. The suburb is served by 30 bus stops.
What is the population of Duffy?
At the 2021 Census Duffy had 3,395 usual residents, with a median age of 39 and an average household size of 2.7 people. The wider Duffy statistical area, which contains Duffy, went from 3,239 people in 2001 to 3,514 in 2025, up 8%.
Is Duffy an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Duffy scores 1108 and sits in decile 10 of 10 nationally and decile 7 within the Australian Capital Territory (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Duffy?
Median household income in Duffy was $2,593 a week at the 2021 Census, against $2,306 for the typical suburb in Weston Creek. Median rent was $445 a week and the median mortgage repayment $2,476 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Holder | 1.4 km | 3% | 16% |
| Rivett | 1.5 km | <1% | 1% |
| Wright Molonglo Valley |
1.9 km | 0% | 19% |
| Coombs Molonglo Valley |
2.1 km | 13% | 41% |
| Chapman | 2.3 km | 0% | 33% |
| Stirling | 2.4 km | 1% | 0% |
| Weston | 2.6 km | 4% | 36% |
| Waramanga | 3.4 km | 1% | 14% |
| Fisher | 3.8 km | 0% | 24% |
| Lyons Woden Valley |
4.0 km | 0% | 54% |