Cathkin flood map & planning overlays
Out at Cathkin, flood mapping covers 23.5%, 4th of 40 in Murrindindi.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of Cathkin
(Murrindindi, VIC) - 23.67 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 24 October 2026.
Constraint readout
23.67 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Cathkin'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 Cathkin
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: observed, lowest 3,500 ft - night is sampled as often as day, but night traffic is light, so this is a floor and no rate can be put on it.
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.
Cathkin at a glance
How Cathkin is zoned
Selling in Cathkin? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 23.67 km², Cathkin is highly constrained by planning overlays. About 24% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. There are 5 heritage-listed sites on record, and the dominant land-use zone is Farming Zone (FZ1). The median lot measures about 35,235 m² across 119 parcels.
Who lives in Cathkin
Census 2021 figures published by the ABS for the Cathkin 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 1000, and decile 6 within Victoria. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Alexandra, the wider ABS statistical area containing Cathkin. There is no annual population series published at suburb level, so this describes the surrounding area rather than Cathkin itself.
6,263 in 2001 to 6,849 in 2025, up 9%.
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.
Cathkin 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 Cathkin 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 Cathkin lot.
Cathkin planning - frequently asked
Is Cathkin flood-prone?
About 24% of Cathkin falls within a mapped flood overlay, against the council-wide suburb average of 9%.
Is Cathkin bushfire-prone?
Around 100% of Cathkin is mapped as bushfire-prone, compared with a Murrindindi average of 100%.
Is Cathkin under a flight path?
Aircraft were observed over about 26% of Cathkin 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 Cathkin?
The dominant planning zone in Cathkin is Farming Zone (FZ1), though the suburb also includes Public Conservation and Resource Zone (PCRZ) and Transport Zone (TRZ2).
Does Cathkin have heritage-listed places?
Cathkin has 5 heritage-listed places on record.
What is the typical lot size in Cathkin?
Across 119 surveyed parcels in Cathkin, the median lot size is about 35,235 m². There are also 2 registered easements mapped in the suburb.
Is Cathkin an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Cathkin scores 1000 and sits in decile 6 of 10 nationally and decile 6 within Victoria (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Koriella | 3.7 km | 8% | 100% |
| Whanregarwen | 6.6 km | 31% | 100% |
| Yarck | 8.1 km | 2% | 100% |
| Molesworth | 8.2 km | 15% | 100% |
| Fawcett | 11.5 km | 1% | 100% |
| Alexandra | 11.6 km | 13% | 96% |
| Limestone | 13.3 km | 0% | 100% |
| Kanumbra | 13.6 km | Not mapped | 100% |
| Acheron | 14.7 km | 20% | 100% |
| Caveat | 15.5 km | Not mapped | 100% |