Montagu Bay flood map & planning overlays
A planning-constraint profile of Montagu Bay
(Clarence, TAS) - 0.45 km², mapped from live council and
state overlay data. This suburb is moderately constrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
0.45 km² - this suburb is moderately constrained by planning overlays.
Elevation hillshade with street names, clipped to Montagu Bay's boundary, with the flood, bushfire and environmental overlays drawn on top. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Montagu 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 4 Sep to 3 Oct 2026
typical observed square 1 a day
Night movements: observed, lowest 1,500 ft - night is sampled as often as day, but night traffic is light, so this is a floor and no rate can be put on it.
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.
Montagu Bay at a glance
How Montagu Bay is zoned
Buying in Montagu 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 0.45 km², Montagu Bay is moderately constrained by planning overlays. About 14% of the suburb sits within a mapped flood overlay, and 6% is flagged bushfire-prone. The dominant land-use zone is General Residential. The median lot measures about 692 m² across 383 parcels.
Who lives in Montagu Bay
Census 2021 figures published by the ABS for the Montagu 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 994, and decile 9 within Tasmania. The national average is 1000.
Age profile
Share of Montagu Bay's 718 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Bellerive - Rosny, the wider ABS statistical area containing Montagu Bay. There is no annual population series published at suburb level, so this describes the surrounding area rather than Montagu Bay itself.
6,050 in 2001 to 6,561 in 2025, up 8%.
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.
Montagu 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 3 October 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 Montagu 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.
Aircraft have been seen below 3,000 ft over about 83% of Montagu Bay. The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Published flood models are held here: a Flood Model Report is available for about 360 Montagu Bay addresses (+$9 with the planning report).
See what's in the $9 report →Montagu Bay planning - frequently asked
Is Montagu Bay flood-prone?
About 14% of Montagu Bay falls within a mapped flood overlay, against the council-wide suburb average of 17%. Modelled flood depth, velocity and flood level are held for about 360 Montagu Bay addresses, from published flood studies; the free check on the Flood Model Report page says whether a model reaches a given address.
Is Montagu Bay bushfire-prone?
Around 6% of Montagu Bay is mapped as bushfire-prone, compared with a Clarence average of 66%.
Is Montagu Bay under a flight path?
Aircraft were observed below 3,000 ft over about 83% of Montagu Bay, and over about 100% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 3 Oct 2026). The lowest measured aircraft was at 1,000 ft, with an average of 1,500 ft. At the busiest point in the suburb about 1 aircraft a day were recorded passing over one 500 m square. 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 Montagu Bay?
The dominant planning zone in Montagu Bay is General Residential, though the suburb also includes Utilities and Open Space.
Does Montagu Bay have heritage-listed places?
No heritage-listed places are on record within Montagu Bay.
What is the typical lot size in Montagu Bay?
Across 383 surveyed parcels in Montagu Bay, the median lot size is about 692 m².
What is the population of Montagu Bay?
At the 2021 Census Montagu Bay had 718 usual residents, with a median age of 43 and an average household size of 2.2 people. The wider Bellerive - Rosny statistical area, which contains Montagu Bay, went from 6,050 people in 2001 to 6,561 in 2025, up 8%.
Is Montagu Bay an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Montagu Bay scores 994 and sits in decile 6 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 Montagu Bay?
Median household income in Montagu Bay was $1,489 a week at the 2021 Census, against $1,723 for the typical suburb in Clarence. Median rent was $350 a week and the median mortgage repayment $1,517 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Rosny | 0.7 km | 9% | 34% |
| Rose Bay | 0.7 km | 14% | 38% |
| Rosny Park | 0.9 km | 24% | 0% |
| Bellerive | 1.9 km | 12% | 17% |
| Queens Domain Hobart |
2.4 km | 4% | 71% |
| Glebe Hobart |
2.7 km | 3% | 12% |
| Lindisfarne | 2.9 km | 11% | 63% |
| Warrane | 3.0 km | 10% | 63% |
| Hobart Hobart |
3.1 km | 25% | 0% |
| North Hobart Hobart |
3.4 km | 12% | 0% |