Detention flood map & planning overlays
A planning-constraint profile of Detention
(Circular Head, TAS) - 1.42 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
1.42 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Detention'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 Detention
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
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.
Detention at a glance
How Detention is zoned
Buying in Detention? The zone and code overlays on this page are the Tasmanian Planning Scheme controls a section 337 certificate reports for a title.
Across its 1.42 km², Detention is highly constrained by planning overlays. About 32% of the suburb sits within a mapped flood overlay, and 88% is flagged bushfire-prone. The dominant land-use zone is Agriculture. The median lot measures about 32,071 m² across 21 parcels.
Who lives in Detention
Census 2021 figures published by the ABS for the Detention 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 894, and decile 3 within Tasmania. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of North West, the wider ABS statistical area containing Detention. There is no annual population series published at suburb level, so this describes the surrounding area rather than Detention itself.
4,238 in 2001 to 4,400 in 2025, up 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.
Detention 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 Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Bushfire-prone mapping | Mapped | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Zoning | Mapped | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Heritage and environment | Mapped where published | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Aircraft noise contours (ANEF) | Not held | the Tasmanian Planning Scheme and the LIST (Land Tasmania), 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 Detention 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 14% of Detention. 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 Detention. 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 →Detention planning - frequently asked
Is Detention flood-prone?
About 32% of Detention falls within a mapped flood overlay, against the council-wide suburb average of 14%. Published flood models are held over parts of Detention; the free check on the Flood Model Report page says whether one reaches a given address.
Is Detention bushfire-prone?
Around 88% of Detention is mapped as bushfire-prone, compared with a Circular Head average of 99%.
Is Detention under a flight path?
Aircraft were observed below 3,000 ft over about 14% of Detention, in the period sampled (4 Sep 2026 to 3 Oct 2026). The lowest measured aircraft was at 1,500 ft, with an average of 1,500 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 Detention?
The dominant planning zone in Detention is Agriculture, though the suburb also includes Environmental Management and Rural.
Does Detention have heritage-listed places?
No heritage-listed places are on record within Detention.
What is the typical lot size in Detention?
Across 21 surveyed parcels in Detention, the median lot size is about 32,071 m².
Is Detention an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Detention scores 894 and sits in decile 2 of 10 nationally and decile 3 within Tasmania (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Hellyer | 2.1 km | 15% | 95% |
| Rocky Cape | 2.7 km | 12% | 100% |
| Edgcumbe Beach | 3.5 km | 10% | 100% |
| Crayfish Creek | 4.7 km | 12% | 96% |
| Port Latta | 6.0 km | 17% | 94% |
| Cowrie Point | 7.9 km | 8% | 100% |
| Montumana | 8.4 km | 8% | 100% |
| Black River | 10.6 km | 14% | 100% |
| Sisters Beach Waratah-Wynyard |
11.9 km | 15% | 98% |
| Mawbanna | 12.9 km | 8% | 100% |