Mount Lonarch flood map & planning overlays
Mount Lonarch holds 25 ha conservation lots with a 6.8% flood share.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of Mount Lonarch
(Pyrenees, VIC) - 65.33 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 24 October 2026.
Constraint readout
65.33 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Mount Lonarch'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 Mount Lonarch
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.
Mount Lonarch at a glance
How Mount Lonarch is zoned
Selling in Mount Lonarch? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 65.33 km², Mount Lonarch is highly constrained by planning overlays. About 7% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. There are 2 heritage-listed sites on record, and the dominant land-use zone is Rural Conservation Zone (RCZ). The median lot measures about 248,217 m² across 145 parcels.
Who lives in Mount Lonarch
Census 2021 figures published by the ABS for the Mount Lonarch 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 940, and decile 2 within Victoria. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Beaufort, the wider ABS statistical area containing Mount Lonarch. There is no annual population series published at suburb level, so this describes the surrounding area rather than Mount Lonarch itself.
3,809 in 2001 to 4,816 in 2025, up 26%.
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.
Mount Lonarch 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 Mount Lonarch 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 Mount Lonarch lot.
Mount Lonarch planning - frequently asked
Is Mount Lonarch flood-prone?
About 7% of Mount Lonarch falls within a mapped flood overlay, against the council-wide suburb average of 14%.
Is Mount Lonarch bushfire-prone?
Around 100% of Mount Lonarch is mapped as bushfire-prone, compared with a Pyrenees average of 100%.
Is Mount Lonarch under a flight path?
Aircraft were observed over about 20% of Mount Lonarch in the period sampled, but only above 3,000 ft - the lowest measured was 4,000 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 Mount Lonarch?
The dominant planning zone in Mount Lonarch is Rural Conservation Zone (RCZ), though the suburb also includes Farming Zone (FZ) and Public Conservation and Resource Zone (PCRZ).
Does Mount Lonarch have heritage-listed places?
Mount Lonarch has 2 heritage-listed places on record.
What is the typical lot size in Mount Lonarch?
Across 145 surveyed parcels in Mount Lonarch, the median lot size is about 248,217 m². There are also 3 registered easements mapped in the suburb.
Is Mount Lonarch an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Mount Lonarch scores 940 and sits in decile 3 of 10 nationally and decile 2 within Victoria (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Chute | 5.5 km | Not mapped | 100% |
| Amphitheatre | 7.4 km | 11% | 100% |
| Glenlogie | 8.1 km | 9% | 100% |
| Raglan | 11.0 km | 0% | 100% |
| Lexton | 11.5 km | 6% | 100% |
| Waterloo | 11.8 km | 0% | 100% |
| Glenpatrick | 13.3 km | 13% | 100% |
| Main Lead | 13.6 km | 1% | 100% |
| Mount Cole Ararat |
15.7 km | 6% | 100% |
| Langi Kal Kal | 16.0 km | 0% | 100% |