Cranbrook flood map & planning overlays
A planning-constraint profile of Cranbrook
(Glamorgan-Spring Bay, TAS) - 196.12 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 12 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
196.12 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Cranbrook's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Cranbrook
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 to
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.
Cranbrook at a glance
How Cranbrook is zoned
Buying in Cranbrook? The zone and code overlays on this page are the Tasmanian Planning Scheme controls a section 337 certificate reports for a title.
Across its 196.12 km², Cranbrook is highly constrained by planning overlays. About 19% of the suburb sits within a mapped flood overlay, and 95% is flagged bushfire-prone. There are 9 heritage-listed sites on record, and the dominant land-use zone is Agriculture. The median lot measures about 217,062 m² across 190 parcels.
Who lives in Cranbrook
Census 2021 figures published by the ABS for the Cranbrook 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 978, and decile 8 within Tasmania. The national average is 1000.
Age profile
Share of Cranbrook's 60 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Triabunna - Bicheno, the wider ABS statistical area containing Cranbrook. There is no annual population series published at suburb level, so this describes the surrounding area rather than Cranbrook itself.
3,987 in 2001 to 5,303 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.
Cranbrook 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 12 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 Cranbrook 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.
Published flood models are held here: a Flood Model Report is available for about 40 Cranbrook addresses (+$9 with the planning report).
See what's in the $9 report →Cranbrook planning - frequently asked
Is Cranbrook flood-prone?
About 19% of Cranbrook falls within a mapped flood overlay, against the council-wide suburb average of 16%. Modelled flood depth, velocity and flood level are held for about 40 Cranbrook addresses, from published flood studies; the free check on the Flood Model Report page says whether a model reaches a given address.
Is Cranbrook bushfire-prone?
Around 95% of Cranbrook is mapped as bushfire-prone, compared with a Glamorgan-Spring Bay average of 96%.
Is Cranbrook under a flight path?
No aircraft were observed over Cranbrook in the period sampled (recent weeks to now). Sampling is intermittent, so that is a floor rather than proof that none fly over. 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 Cranbrook?
The dominant planning zone in Cranbrook is Agriculture, though the suburb also includes Rural and Environmental Management.
Does Cranbrook have heritage-listed places?
Cranbrook has 9 heritage-listed places on record.
What is the typical lot size in Cranbrook?
Across 190 surveyed parcels in Cranbrook, the median lot size is about 217,062 m².
What is the population of Cranbrook?
At the 2021 Census Cranbrook had 60 usual residents, with a median age of 54 and an average household size of 2.3 people. The wider Triabunna - Bicheno statistical area, which contains Cranbrook, went from 3,987 people in 2001 to 5,303 in 2025, up 33%.
Is Cranbrook an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Cranbrook scores 978 and sits in decile 5 of 10 nationally and decile 8 within Tasmania (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Cranbrook?
Median household income in Cranbrook was $1,312 a week at the 2021 Census, against $972 for the typical suburb in Glamorgan-Spring Bay. Median rent was $155 a week and the median mortgage repayment $758 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Apslawn | 9.1 km | 35% | 86% |
| Dolphin Sands | 15.9 km | 44% | 82% |
| Swansea | 16.4 km | 15% | 99% |
| Friendly Beaches | 17.8 km | 23% | 93% |
| Coles Bay | 18.0 km | 26% | 86% |
| Bicheno | 18.2 km | 20% | 99% |
| Royal George Northern Midlands |
18.8 km | 8% | 100% |
| Lake Leake Northern Midlands |
19.0 km | 8% | 99% |
| Douglas-Apsley Break O'Day |
22.3 km | 9% | 100% |
| Douglas River Break O'Day |
24.6 km | 30% | 100% |