Marnoo West flood map & planning overlays
48.9% of Marnoo West's 16 ha farmland is flood-mapped.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of Marnoo West
(Northern Grampians, VIC) - 85.97 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 25 October 2026.
Constraint readout
85.97 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Marnoo West's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Marnoo West
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.
Marnoo West at a glance
How Marnoo West is zoned
Selling in Marnoo West? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 85.97 km², Marnoo West is highly constrained by planning overlays. About 49% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. The dominant land-use zone is Farming Zone (FZ). The median lot measures about 162,921 m² across 282 parcels.
Who lives in Marnoo West
Census 2021 figures published by the ABS for the Marnoo West 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 1030, and decile 8 within Victoria. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of St Arnaud, the wider ABS statistical area containing Marnoo West. There is no annual population series published at suburb level, so this describes the surrounding area rather than Marnoo West itself.
4,075 in 2001 to 3,394 in 2025, down 17%.
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.
Marnoo West 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 25 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 Marnoo West 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 →Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and the indicative soil reactivity range to expect for a Marnoo West lot.
Marnoo West planning - frequently asked
Is Marnoo West flood-prone?
About 49% of Marnoo West falls within a mapped flood overlay, against the council-wide suburb average of 27%.
Is Marnoo West bushfire-prone?
Around 100% of Marnoo West is mapped as bushfire-prone, compared with a Northern Grampians average of 100%.
Is Marnoo West under a flight path?
No aircraft were observed over Marnoo West in the period sampled (4 Sep 2026 to 24 Oct 2026). Sampling is intermittent, so that is a floor rather than proof that none fly over. 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 Marnoo West?
The dominant planning zone in Marnoo West is Farming Zone (FZ), though the suburb also includes Public Conservation and Resource Zone (PCRZ) and Transport Zone (TRZ2).
Does Marnoo West have heritage-listed places?
No heritage-listed places are on record within Marnoo West.
What is the typical lot size in Marnoo West?
Across 282 surveyed parcels in Marnoo West, the median lot size is about 162,921 m². There are also 3 registered easements mapped in the suburb.
Is Marnoo West an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Marnoo West scores 1030 and sits in decile 8 of 10 nationally and decile 8 within Victoria (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Wallaloo | 10.1 km | 15% | 100% |
| Marnoo | 10.5 km | 35% | 100% |
| Rupanyup Yarriambiack |
10.8 km | 26% | 100% |
| Callawadda | 13.6 km | 21% | 100% |
| Banyena | 13.7 km | 86% | 100% |
| Grays Bridge | 13.9 km | 100% | 100% |
| Riachella | 15.8 km | 79% | 100% |
| Marnoo East | 16.8 km | 68% | 100% |
| York Plains | 17.2 km | 98% | 100% |
| Wallaloo East | 17.4 km | 17% | 100% |