Deans Marsh flood map & planning overlays
Deans Marsh, median 47, counts 12 heritage places on 14,628 m² lots.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of Deans Marsh
(Surf Coast, VIC) - 57.01 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 24 October 2026.
Constraint readout
57.01 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Deans Marsh'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 Deans Marsh
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
typical observed square 0 a day
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.
Deans Marsh at a glance
How Deans Marsh is zoned
Selling in Deans Marsh? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 57.01 km², Deans Marsh is highly constrained by planning overlays. About 5% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. There are 12 heritage-listed sites on record, and the dominant land-use zone is Farming Zone (FZ1). The median lot measures about 14,628 m² across 389 parcels.
Who lives in Deans Marsh
Census 2021 figures published by the ABS for the Deans Marsh 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 1055, and decile 9 within Victoria. The national average is 1000.
Age profile
Share of Deans Marsh's 368 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Winchelsea, the wider ABS statistical area containing Deans Marsh. There is no annual population series published at suburb level, so this describes the surrounding area rather than Deans Marsh itself.
5,418 in 2001 to 7,079 in 2025, up 31%.
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.
Deans Marsh 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 Deans Marsh 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 →Aircraft have been seen below 3,000 ft over about 16% of Deans Marsh. 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 Deans Marsh lot.
Deans Marsh planning - frequently asked
Is Deans Marsh flood-prone?
About 5% of Deans Marsh falls within a mapped flood overlay, against the council-wide suburb average of 7%.
Is Deans Marsh bushfire-prone?
Around 100% of Deans Marsh is mapped as bushfire-prone, compared with a Surf Coast average of 97%.
Is Deans Marsh under a flight path?
Aircraft were observed below 3,000 ft over about 16% of Deans Marsh, and over about 38% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 24 Oct 2026). The lowest measured aircraft was at 1,000 ft, with an average of 3,500 ft. At the busiest point in the suburb about 0 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 Deans Marsh?
The dominant planning zone in Deans Marsh is Farming Zone (FZ1), though the suburb also includes Public Conservation and Resource Zone (PCRZ) and Transport Zone (TRZ2).
Does Deans Marsh have heritage-listed places?
Deans Marsh has 12 heritage-listed places on record.
What is the typical lot size in Deans Marsh?
Across 389 surveyed parcels in Deans Marsh, the median lot size is about 14,628 m². There are also 136 registered easements mapped in the suburb.
Does Deans Marsh have a train station?
There is no train station inside Deans Marsh itself. The suburb is served by 2 bus stops.
What is the population of Deans Marsh?
At the 2021 Census Deans Marsh had 368 usual residents, with a median age of 47 and an average household size of 2.5 people. The wider Winchelsea statistical area, which contains Deans Marsh, went from 5,418 people in 2001 to 7,079 in 2025, up 31%.
Is Deans Marsh an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Deans Marsh scores 1055 and sits in decile 9 of 10 nationally and decile 9 within Victoria (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Deans Marsh?
Median household income in Deans Marsh was $1,731 a week at the 2021 Census, against $2,045 for the typical suburb in Surf Coast. Median rent was $288 a week and the median mortgage repayment $1,479 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Pennyroyal | 3.9 km | 2% | 100% |
| Bambra | 6.7 km | <1% | 100% |
| Whoorel Colac Otway |
6.9 km | <1% | 100% |
| Boonah | 7.8 km | Not mapped | 100% |
| Murroon Colac Otway |
9.1 km | 9% | 100% |
| Benwerrin | 9.4 km | Not mapped | 100% |
| Birregurra Colac Otway |
9.7 km | 31% | 99% |
| Winchelsea South | 11.8 km | 3% | 100% |
| Big Hill (Lorne) | 12.6 km | <1% | 100% |
| Lorne | 13.1 km | <1% | 100% |