Mountain Bay flood map & planning overlays
Mountain Bay's median local, 61, is 2nd only to Jamieson in Mansfield.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of Mountain Bay
(Mansfield, VIC) - 9.29 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 24 October 2026.
Constraint readout
9.29 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Mountain 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 Mountain Bay
The ANEF contour is a published planning forecast and observed overflight is what a sampled tracking feed recorded - neither describes any individual property.
Observed overflight - sampled 4 Sep to 24 Oct 2026
Night movements: not established - night is sampled as often as day, but too few night flights have been seen here to conclude either way.
How this is measured
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.
Mountain Bay at a glance
How Mountain Bay is zoned
Selling in Mountain Bay? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 9.29 km², Mountain Bay is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 100% is flagged bushfire-prone. The dominant land-use zone is Special Use Zone (SUZ1). The median lot measures about 7,877 m² across 90 parcels.
Who lives in Mountain Bay
Census 2021 figures published by the ABS for the Mountain 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 963, and decile 3 within Victoria. The national average is 1000.
Age profile
Share of Mountain Bay's 54 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Mansfield (Vic.), the wider ABS statistical area containing Mountain Bay. There is no annual population series published at suburb level, so this describes the surrounding area rather than Mountain Bay itself.
6,907 in 2001 to 11,324 in 2025, up 64%.
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.
Mountain 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 | Vicmap Planning and Victorian Government spatial services |
| Bushfire-prone mapping | Mapped | Vicmap Planning and Victorian Government spatial services |
| Zoning | Mapped | Vicmap Planning and Victorian Government spatial services |
| Heritage and environment | Mapped where published | Vicmap Planning and Victorian Government spatial services |
| Aircraft noise contours (ANEF) | Not held | Vicmap Planning and Victorian Government spatial services, 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 24 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 Mountain 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.
See what's in the $9 report →The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and the indicative soil reactivity range to expect for a Mountain Bay lot.
Mountain Bay planning - frequently asked
Is Mountain Bay flood-prone?
Flood mapping covers Mountain Bay and less than 1% of the suburb falls within a mapped flood overlay (the council-wide suburb average is 7%).
Is Mountain Bay bushfire-prone?
Around 100% of Mountain Bay is mapped as bushfire-prone, compared with a Mansfield average of 99%.
Is Mountain Bay under a flight path?
Aircraft were observed over about 11% of Mountain Bay in the period sampled, but only above 3,000 ft - the lowest measured was 5,000 ft. 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 Mountain Bay?
The dominant planning zone in Mountain Bay is Special Use Zone (SUZ1), though the suburb also includes Farming Zone (FZ) and Public Park and Recreation Zone (PPRZ).
Does Mountain Bay have heritage-listed places?
No heritage-listed places are on record within Mountain Bay.
What is the typical lot size in Mountain Bay?
Across 90 surveyed parcels in Mountain Bay, the median lot size is about 7,877 m². There are also 41 registered easements mapped in the suburb.
What is the population of Mountain Bay?
At the 2021 Census Mountain Bay had 54 usual residents, with a median age of 61 and an average household size of 1.9 people. The wider Mansfield (Vic.) statistical area, which contains Mountain Bay, went from 6,907 people in 2001 to 11,324 in 2025, up 64%.
Is Mountain Bay an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Mountain Bay scores 963 and sits in decile 4 of 10 nationally and decile 3 within Victoria (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Mountain Bay?
Median household income in Mountain Bay was $966 a week at the 2021 Census, against $1,408 for the typical suburb in Mansfield.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Piries | 3.3 km | 14% | 100% |
| Macs Cove | 3.7 km | 2% | 100% |
| Howqua Inlet | 4.6 km | 2% | 100% |
| Goughs Bay | 5.6 km | 10% | 100% |
| Jamieson | 8.2 km | 5% | 100% |
| Delatite | 9.4 km | 25% | 100% |
| Howqua | 9.6 km | 4% | 100% |
| Boorolite | 9.9 km | 4% | 100% |
| Howes Creek | 10.4 km | 36% | 92% |
| Lake Eildon | 12.6 km | 33% | 97% |