Rocklyn flood map & planning overlays
Rocklyn's 2 ha farms hold 6 heritage places, all bushfire-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 Rocklyn
(Hepburn, VIC) - 17.44 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 24 October 2026.
Constraint readout
17.44 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Rocklyn'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 Rocklyn
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 3,000 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.
Rocklyn at a glance
How Rocklyn is zoned
Selling in Rocklyn? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 17.44 km², Rocklyn is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 100% is flagged bushfire-prone. There are 6 heritage-listed sites on record, and the dominant land-use zone is Farming Zone (FZ1). The median lot measures about 20,152 m² across 181 parcels.
Who lives in Rocklyn
Census 2021 figures published by the ABS for the Rocklyn 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 992, and decile 5 within Victoria. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Daylesford, the wider ABS statistical area containing Rocklyn. There is no annual population series published at suburb level, so this describes the surrounding area rather than Rocklyn itself.
8,201 in 2001 to 10,342 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.
Rocklyn 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 Rocklyn 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 2% of Rocklyn. 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 Rocklyn lot.
Rocklyn planning - frequently asked
Is Rocklyn flood-prone?
Flood mapping covers Rocklyn and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 7%).
Is Rocklyn bushfire-prone?
Around 100% of Rocklyn is mapped as bushfire-prone, compared with a Hepburn average of 100%.
Is Rocklyn under a flight path?
Aircraft were observed below 3,000 ft over about 2% of Rocklyn, and over about 36% 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 2,500 ft, with an average of 4,500 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 Rocklyn?
The dominant planning zone in Rocklyn is Farming Zone (FZ1), though the suburb also includes Public Conservation and Resource Zone (PCRZ) and Township Zone (TZ1).
Does Rocklyn have heritage-listed places?
Rocklyn has 6 heritage-listed places on record.
What is the typical lot size in Rocklyn?
Across 181 surveyed parcels in Rocklyn, the median lot size is about 20,152 m². There are also 1 registered easements mapped in the suburb.
Is Rocklyn an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Rocklyn scores 992 and sits in decile 6 of 10 nationally and decile 5 within Victoria (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Langdons Hill | 2.6 km | Not mapped | 100% |
| Mollongghip Moorabool |
3.9 km | 0% | 100% |
| Mount Prospect | 4.6 km | Not mapped | 100% |
| Barkstead Moorabool |
5.2 km | Not mapped | 100% |
| Korweinguboora Moorabool |
5.6 km | Not mapped | 100% |
| Sailors Falls | 6.6 km | 8% | 100% |
| Leonards Hill | 6.9 km | 2% | 100% |
| Newlyn North | 7.7 km | 10% | 97% |
| Dean | 8.1 km | 5% | 100% |
| Newlyn | 8.1 km | 8% | 100% |