Isaacs flood map & planning overlays
A planning-constraint profile of Isaacs
(Woden Valley, ACT) - 3.08 km², mapped from live district 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
3.08 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Isaacs'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 Isaacs
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 3 Oct 2026
typical observed square 1 a day
Night movements: observed, lowest 3,000 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.
Isaacs at a glance
How Isaacs is zoned
Buying in Isaacs? The Territory Plan zone on this page sits alongside the Crown lease, which sets what a block may actually be used for.
Across its 3.08 km², Isaacs is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 69% is flagged bushfire-prone. There is 1 heritage-listed site on record, and the dominant land-use zone is Designated. The median lot measures about 871 m² across 796 parcels.
Who lives in Isaacs
Census 2021 figures published by the ABS for the Isaacs 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 1115, and decile 7 within the Australian Capital Territory. The national average is 1000.
Age profile
Share of Isaacs's 2,379 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Isaacs, the wider ABS statistical area containing Isaacs. There is no annual population series published at suburb level, so this describes the surrounding area rather than Isaacs itself.
2,641 in 2001 to 2,402 in 2025, down 9%.
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.
Isaacs 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 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 Isaacs 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 6% of Isaacs. 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 Isaacs. 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 →Isaacs planning - frequently asked
Is Isaacs flood-prone?
Flood mapping covers Isaacs 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 Isaacs; the free check on the Flood Model Report page says whether one reaches a given address.
Is Isaacs bushfire-prone?
Around 69% of Isaacs is mapped as bushfire-prone, compared with a Woden Valley average of 33%.
Is Isaacs under a flight path?
Aircraft were observed below 3,000 ft over about 6% of Isaacs, and over about 76% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 3 Oct 2026). The lowest measured aircraft was at 2,500 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 Isaacs?
The dominant planning zone in Isaacs is Designated, though the suburb also includes Suburban and Urban Open Space.
Does Isaacs have heritage-listed places?
Isaacs has 1 heritage-listed place on record.
What is the typical lot size in Isaacs?
Across 796 surveyed parcels in Isaacs, the median lot size is about 871 m². There are also 766 registered easements mapped in the suburb.
Does Isaacs have a train station?
There is no train station inside Isaacs itself. The suburb is served by 19 bus stops.
What is the population of Isaacs?
At the 2021 Census Isaacs had 2,379 usual residents, with a median age of 49 and an average household size of 2.5 people. The wider Isaacs statistical area, which contains Isaacs, went from 2,641 people in 2001 to 2,402 in 2025, down 9%.
Is Isaacs an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Isaacs scores 1115 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 Isaacs?
Median household income in Isaacs was $2,670 a week at the 2021 Census, against $2,576 for the typical suburb in Woden Valley. Median rent was $520 a week and the median mortgage repayment $2,300 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| O'Malley | 1.3 km | <1% | 74% |
| Mawson | 1.4 km | 4% | 6% |
| Farrer | 1.6 km | 0% | 27% |
| Torrens | 2.5 km | 0% | 15% |
| Pearce | 2.8 km | 0% | 10% |
| Garran | 2.9 km | 0% | 41% |
| Phillip | 2.9 km | 4% | <1% |
| Chifley | 3.5 km | 0% | 33% |
| Red Hill Canberra Central |
3.7 km | 0% | 47% |
| Hughes | 4.0 km | 0% | 22% |