Great Bay flood map & planning overlays
A planning-constraint profile of Great Bay
(Kingborough, TAS) - 14.19 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 6 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
14.19 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Great Bay's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Great Bay at a glance
How Great Bay is zoned
Buying in Great 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 14.19 km², Great Bay is highly constrained by planning overlays. About 10% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. The dominant land-use zone is Environmental Living. The median lot measures about 3,058 m² across 113 parcels.
Who lives in Great Bay
Census 2021 figures published by the ABS for the Great 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 1010, and decile 9 within Tasmania. The national average is 1000.
Age profile
Share of Great Bay's 92 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Bruny Island - Kettering, the wider ABS statistical area containing Great Bay. There is no annual population series published at suburb level, so this describes the surrounding area rather than Great Bay itself.
2,601 in 2001 to 3,633 in 2025, up 40%.
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.
Great 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 | Watched, not yet sampled here | adsb.lol, under the Open Database License |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 6 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 Great 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 80 Great Bay addresses (+$9 with the planning report).
See what's in the $9 report →Great Bay planning - frequently asked
Is Great Bay flood-prone?
About 10% of Great Bay falls within a mapped flood overlay, against the council-wide suburb average of 6%. Modelled flood depth, velocity and flood level are held for about 80 Great Bay addresses, from published flood studies; the free check on the Flood Model Report page says whether a model reaches a given address.
Is Great Bay bushfire-prone?
Around 100% of Great Bay is mapped as bushfire-prone, compared with a Kingborough average of 94%.
What is the zoning in Great Bay?
The dominant planning zone in Great Bay is Environmental Living, though the suburb also includes Rural Resource and Environmental Management.
Does Great Bay have heritage-listed places?
No heritage-listed places are on record within Great Bay.
What is the typical lot size in Great Bay?
Across 113 surveyed parcels in Great Bay, the median lot size is about 3,058 m².
What is the population of Great Bay?
At the 2021 Census Great Bay had 92 usual residents, with a median age of 51 and an average household size of 2.2 people. The wider Bruny Island - Kettering statistical area, which contains Great Bay, went from 2,601 people in 2001 to 3,633 in 2025, up 40%.
Is Great Bay an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Great Bay scores 1010 and sits in decile 7 of 10 nationally and decile 9 within Tasmania (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Great Bay?
Median household income in Great Bay was $1,312 a week at the 2021 Census, against $1,550 for the typical suburb in Kingborough. Median rent was $300 a week and the median mortgage repayment $1,517 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| North Bruny | 6.8 km | 6% | 99% |
| Simpsons Bay | 8.6 km | 9% | 100% |
| Apollo Bay | 9.2 km | 6% | 100% |
| Flowerpot | 10.2 km | 3% | 100% |
| Middleton | 11.2 km | 5% | 100% |
| Barnes Bay | 11.5 km | 8% | 96% |
| Birchs Bay | 12.2 km | 4% | 100% |
| Alonnah | 12.8 km | 6% | 100% |
| Gordon | 13.6 km | 4% | 100% |
| Woodbridge | 14.3 km | 5% | 99% |