Porcupine Ridge flood map & planning overlays
Porcupine Ridge keeps 4 ha farms inside full bushfire mapping, median 54.
A planning-constraint profile of Porcupine Ridge
(Hepburn, VIC) - 28.11 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 24 October 2026.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
28.11 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Porcupine Ridge'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 Porcupine Ridge
Two different things, kept apart on purpose. The ANEF contour is the planning instrument - a forecast published per airport that planning schemes use to control noise-sensitive development. Observed overflight is what a sampled aircraft-tracking feed actually recorded over the suburb - where aircraft flew, how low and how often.
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.
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.
Porcupine Ridge at a glance
How Porcupine Ridge is zoned
Selling in Porcupine Ridge? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 28.11 km², Porcupine Ridge is highly constrained by planning overlays. About 3% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. There are 4 heritage-listed sites on record, and the dominant land-use zone is Farming Zone (FZ2). The median lot measures about 42,389 m² across 191 parcels.
Who lives in Porcupine Ridge
Census 2021 figures published by the ABS for the Porcupine Ridge 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 1047, and decile 9 within Victoria. The national average is 1000.
Age profile
Share of Porcupine Ridge's 149 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Daylesford, the wider ABS statistical area containing Porcupine Ridge. There is no annual population series published at suburb level, so this describes the surrounding area rather than Porcupine Ridge 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.
Porcupine Ridge 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 Porcupine Ridge 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 Porcupine Ridge lot.
Porcupine Ridge planning - frequently asked
Is Porcupine Ridge flood-prone?
About 3% of Porcupine Ridge falls within a mapped flood overlay, against the council-wide suburb average of 7%.
Is Porcupine Ridge bushfire-prone?
Around 100% of Porcupine Ridge is mapped as bushfire-prone, compared with a Hepburn average of 100%.
Is Porcupine Ridge under a flight path?
Aircraft were observed over about 31% of Porcupine Ridge in the period sampled, but only above 3,000 ft - the lowest measured was 3,000 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 Porcupine Ridge?
The dominant planning zone in Porcupine Ridge is Farming Zone (FZ2), though the suburb also includes Public Conservation and Resource Zone (PCRZ) and Rural Living Zone (RLZ1).
Does Porcupine Ridge have heritage-listed places?
Porcupine Ridge has 4 heritage-listed places on record.
What is the typical lot size in Porcupine Ridge?
Across 191 surveyed parcels in Porcupine Ridge, the median lot size is about 42,389 m². There are also 45 registered easements mapped in the suburb.
What is the population of Porcupine Ridge?
At the 2021 Census Porcupine Ridge had 149 usual residents, with a median age of 54 and an average household size of 2.2 people. The wider Daylesford statistical area, which contains Porcupine Ridge, went from 8,201 people in 2001 to 10,342 in 2025, up 26%.
Is Porcupine Ridge an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Porcupine Ridge scores 1047 and sits in decile 9 of 10 nationally and decile 9 within Victoria (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Porcupine Ridge?
Median household income in Porcupine Ridge was $1,390 a week at the 2021 Census, against $1,400 for the typical suburb in Hepburn. Median rent was $300 a week and the median mortgage repayment $1,820 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Mount Franklin | 4.1 km | Not mapped | 100% |
| Dry Diggings | 4.1 km | <1% | 100% |
| Glenlyon | 4.3 km | 8% | 100% |
| Coomoora | 5.7 km | 4% | 100% |
| Elevated Plains | 6.0 km | 4% | 100% |
| Hepburn Springs | 6.2 km | 5% | 100% |
| Hepburn | 7.2 km | 7% | 100% |
| Wheatsheaf | 7.8 km | 12% | 100% |
| Shepherds Flat | 8.4 km | 9% | 100% |
| Daylesford | 8.6 km | 8% | 100% |