Avon Plains flood map & planning overlays
Avon Plains farms 33 ha lots, flood mapping covering 46.4%.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of Avon Plains
(Northern Grampians, VIC) - 62.52 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 15 October 2026.
Constraint readout
62.52 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Avon Plains's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Avon Plains
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 to
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.
Avon Plains at a glance
How Avon Plains is zoned
Selling in Avon Plains? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 62.52 km², Avon Plains is highly constrained by planning overlays. About 46% 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 333,856 m² across 136 parcels.
Who lives in Avon Plains
Census 2021 figures published by the ABS for the Avon Plains 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 Avon Plains. There is no annual population series published at suburb level, so this describes the surrounding area rather than Avon Plains 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.
Avon Plains 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 15 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 Avon Plains 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 Avon Plains lot.
Avon Plains planning - frequently asked
Is Avon Plains flood-prone?
About 46% of Avon Plains falls within a mapped flood overlay, against the council-wide suburb average of 27%.
Is Avon Plains bushfire-prone?
Around 100% of Avon Plains is mapped as bushfire-prone, compared with a Northern Grampians average of 100%.
Is Avon Plains under a flight path?
No aircraft were observed over Avon Plains in the period sampled (recent weeks to now). 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 Avon Plains?
The dominant planning zone in Avon Plains is Farming Zone (FZ), though the suburb also includes Public Conservation and Resource Zone (PCRZ) and Transport Zone (TRZ2).
Does Avon Plains have heritage-listed places?
No heritage-listed places are on record within Avon Plains.
What is the typical lot size in Avon Plains?
Across 136 surveyed parcels in Avon Plains, the median lot size is about 333,856 m². There are also 18 registered easements mapped in the suburb.
Is Avon Plains an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Avon Plains 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 |
|---|---|---|---|
| Rich Avon East | 4.9 km | 86% | 100% |
| Traynors Lagoon | 6.4 km | 33% | 100% |
| York Plains | 6.5 km | 98% | 100% |
| Swanwater West | 7.0 km | 10% | 100% |
| Grays Bridge | 10.0 km | 100% | 100% |
| Rich Avon Buloke |
10.4 km | 21% | 100% |
| Banyena | 10.5 km | 86% | 100% |
| Cope Cope Buloke |
12.9 km | 35% | 100% |
| Rich Avon West | 13.1 km | 22% | 100% |
| Marnoo East | 13.1 km | 68% | 100% |