Cornwall flood map & planning overlays
A planning-constraint profile of Cornwall
(Break O'Day, TAS) - 5.42 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
5.42 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Cornwall's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Cornwall at a glance
How Cornwall is zoned
Buying in Cornwall? The zone and code overlays on this page are the Tasmanian Planning Scheme controls a section 337 certificate reports for a title.
Across its 5.42 km², Cornwall is highly constrained by planning overlays. About 3% of the suburb sits within a mapped flood overlay, and 99% is flagged bushfire-prone. The dominant land-use zone is Rural. The median lot measures about 1,012 m² across 129 parcels.
Who lives in Cornwall
Census 2021 figures published by the ABS for the Cornwall 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 870, and decile 2 within Tasmania. The national average is 1000.
Age profile
Share of Cornwall's 82 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of St Helens - Scamander, the wider ABS statistical area containing Cornwall. There is no annual population series published at suburb level, so this describes the surrounding area rather than Cornwall itself.
5,830 in 2001 to 7,219 in 2025, up 24%.
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.
Cornwall 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 Cornwall 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 60 Cornwall addresses (+$9 with the planning report).
See what's in the $9 report →Cornwall planning - frequently asked
Is Cornwall flood-prone?
About 3% of Cornwall falls within a mapped flood overlay, against the council-wide suburb average of 13%. Modelled flood depth, velocity and flood level are held for about 60 Cornwall addresses, from published flood studies; the free check on the Flood Model Report page says whether a model reaches a given address.
Is Cornwall bushfire-prone?
Around 99% of Cornwall is mapped as bushfire-prone, compared with a Break O'Day average of 99%.
What is the zoning in Cornwall?
The dominant planning zone in Cornwall is Rural, though the suburb also includes Agriculture and Low Density Residential.
Does Cornwall have heritage-listed places?
No heritage-listed places are on record within Cornwall.
What is the typical lot size in Cornwall?
Across 129 surveyed parcels in Cornwall, the median lot size is about 1,012 m².
What is the population of Cornwall?
At the 2021 Census Cornwall had 82 usual residents, with a median age of 50 and an average household size of 2.1 people. The wider St Helens - Scamander statistical area, which contains Cornwall, went from 5,830 people in 2001 to 7,219 in 2025, up 24%.
Is Cornwall an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Cornwall scores 870 and sits in decile 1 of 10 nationally and decile 2 within Tasmania (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Cornwall?
Median household income in Cornwall was $634 a week at the 2021 Census, against $900 for the typical suburb in Break O'Day. Median rent was $200 a week and the median mortgage repayment $412 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| St Marys | 4.7 km | 12% | 100% |
| Falmouth | 9.8 km | 16% | 99% |
| Gray | 11.5 km | 6% | 100% |
| Four Mile Creek | 12.2 km | 10% | 100% |
| Upper Scamander | 13.0 km | 9% | 100% |
| Scamander | 13.5 km | 30% | 97% |
| Chain Of Lagoons | 15.6 km | 14% | 100% |
| Mathinna | 17.9 km | 9% | 100% |
| Beaumaris | 18.7 km | 10% | 99% |
| Fingal | 20.1 km | 13% | 100% |