Deep Bay flood map & planning overlays
A planning-constraint profile of Deep Bay
(Huon Valley, TAS) - 16.2 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
16.2 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Deep Bay's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Deep Bay
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.
Deep Bay at a glance
How Deep Bay is zoned
Buying in Deep Bay? The zone and code overlays on this page are the Tasmanian Planning Scheme controls a section 337 certificate reports for a title.
Across its 16.2 km², Deep Bay is highly constrained by planning overlays. About 4% of the suburb sits within a mapped flood overlay, and 99% is flagged bushfire-prone. The dominant land-use zone is Landscape Conservation. The median lot measures about 2,186 m² across 246 parcels.
Who lives in Deep Bay
Census 2021 figures published by the ABS for the Deep Bay 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 917, and decile 4 within Tasmania. The national average is 1000.
Age profile
Share of Deep Bay's 267 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Cygnet, the wider ABS statistical area containing Deep Bay. There is no annual population series published at suburb level, so this describes the surrounding area rather than Deep Bay itself.
3,661 in 2001 to 5,216 in 2025, up 42%.
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.
Deep Bay 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 Deep Bay 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 190 Deep Bay addresses (+$9 with the planning report).
See what's in the $9 report →Deep Bay planning - frequently asked
Is Deep Bay flood-prone?
About 4% of Deep Bay falls within a mapped flood overlay, against the council-wide suburb average of 8%. Modelled flood depth, velocity and flood level are held for about 190 Deep Bay addresses, from published flood studies; the free check on the Flood Model Report page says whether a model reaches a given address.
Is Deep Bay bushfire-prone?
Around 99% of Deep Bay is mapped as bushfire-prone, compared with a Huon Valley average of 99%.
Is Deep Bay under a flight path?
No aircraft were observed over Deep Bay 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 Deep Bay?
The dominant planning zone in Deep Bay is Landscape Conservation, though the suburb also includes Rural and Low Density Residential.
Does Deep Bay have heritage-listed places?
No heritage-listed places are on record within Deep Bay.
What is the typical lot size in Deep Bay?
Across 246 surveyed parcels in Deep Bay, the median lot size is about 2,186 m².
What is the population of Deep Bay?
At the 2021 Census Deep Bay had 267 usual residents, with a median age of 54 and an average household size of 2.1 people. The wider Cygnet statistical area, which contains Deep Bay, went from 3,661 people in 2001 to 5,216 in 2025, up 42%.
Is Deep Bay an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Deep Bay scores 917 and sits in decile 2 of 10 nationally and decile 4 within Tasmania (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Deep Bay?
Median household income in Deep Bay was $971 a week at the 2021 Census, against $1,206 for the typical suburb in Huon Valley. Median rent was $270 a week and the median mortgage repayment $800 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Randalls Bay | 3.3 km | 8% | 100% |
| Abels Bay | 3.3 km | 5% | 100% |
| Gardners Bay | 3.8 km | 5% | 100% |
| Garden Island Creek | 4.0 km | 6% | 100% |
| Eggs And Bacon Bay | 4.9 km | 15% | 94% |
| Garden Island | 5.7 km | 8% | 99% |
| Lymington | 6.8 km | 6% | 100% |
| Charlotte Cove | 7.0 km | 19% | 97% |
| Birchs Bay Kingborough |
7.7 km | 4% | 100% |
| Verona Sands | 7.8 km | 10% | 91% |