Alonnah flood map & planning overlays
A planning-constraint profile of Alonnah
(Kingborough, TAS) - 14.81 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
14.81 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Alonnah's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Alonnah at a glance
How Alonnah is zoned
Buying in Alonnah? The zone and code overlays on this page are the Tasmanian Planning Scheme controls a section 337 certificate reports for a title.
Across its 14.81 km², Alonnah is highly constrained by planning overlays. About 6% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. There are 5 heritage-listed sites on record, and the dominant land-use zone is Rural Resource. The median lot measures about 2,899 m² across 294 parcels.
Who lives in Alonnah
Census 2021 figures published by the ABS for the Alonnah 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 927, and decile 4 within Tasmania. The national average is 1000.
Age profile
Share of Alonnah's 164 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Bruny Island - Kettering, the wider ABS statistical area containing Alonnah. There is no annual population series published at suburb level, so this describes the surrounding area rather than Alonnah 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.
Alonnah 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 Alonnah 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 260 Alonnah addresses (+$9 with the planning report).
See what's in the $9 report →Alonnah planning - frequently asked
Is Alonnah flood-prone?
About 6% of Alonnah 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 260 Alonnah addresses, from published flood studies; the free check on the Flood Model Report page says whether a model reaches a given address.
Is Alonnah bushfire-prone?
Around 100% of Alonnah is mapped as bushfire-prone, compared with a Kingborough average of 94%.
What is the zoning in Alonnah?
The dominant planning zone in Alonnah is Rural Resource, though the suburb also includes Environmental Living and Environmental Management.
Does Alonnah have heritage-listed places?
Alonnah has 5 heritage-listed places on record.
What is the typical lot size in Alonnah?
Across 294 surveyed parcels in Alonnah, the median lot size is about 2,899 m².
What is the population of Alonnah?
At the 2021 Census Alonnah had 164 usual residents, with a median age of 59 and an average household size of 1.8 people. The wider Bruny Island - Kettering statistical area, which contains Alonnah, went from 2,601 people in 2001 to 3,633 in 2025, up 40%.
Is Alonnah an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Alonnah scores 927 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 Alonnah?
Median household income in Alonnah was $747 a week at the 2021 Census, against $1,550 for the typical suburb in Kingborough. Median rent was $190 a week and the median mortgage repayment $988 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Simpsons Bay | 4.6 km | 9% | 100% |
| Adventure Bay | 5.9 km | 15% | 99% |
| Lunawanna | 6.4 km | 9% | 100% |
| Gordon | 7.0 km | 4% | 100% |
| South Bruny | 9.0 km | 5% | 100% |
| Verona Sands Huon Valley |
9.1 km | 10% | 91% |
| Middleton | 9.4 km | 5% | 100% |
| Huon Island Huon Valley |
9.9 km | 3% | 99% |
| Charlotte Cove Huon Valley |
10.3 km | 19% | 97% |
| Garden Island Creek Huon Valley |
11.5 km | 6% | 100% |