Three Bridges flood map & planning overlays
Three Bridges holds 2 ha conservation lots, locals at a median of 46.
A planning-constraint profile of Three Bridges
(Yarra Ranges, VIC) - 35.44 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
35.44 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Three Bridges'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 Three Bridges
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.
Three Bridges at a glance
How Three Bridges is zoned
Selling in Three Bridges? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 35.44 km², Three Bridges is highly constrained by planning overlays. About 2% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. The dominant land-use zone is Public Conservation and Resource Zone (PCRZ). The median lot measures about 21,302 m² across 145 parcels.
Who lives in Three Bridges
Census 2021 figures published by the ABS for the Three Bridges 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 976, and decile 4 within Victoria. The national average is 1000.
Age profile
Share of Three Bridges's 188 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Yarra Valley, the wider ABS statistical area containing Three Bridges. There is no annual population series published at suburb level, so this describes the surrounding area rather than Three Bridges itself.
15,932 in 2001 to 17,087 in 2025, up 7%.
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.
Three Bridges 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 Three Bridges 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 Three Bridges. 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 Three Bridges lot.
Three Bridges planning - frequently asked
Is Three Bridges flood-prone?
About 2% of Three Bridges falls within a mapped flood overlay, against the council-wide suburb average of 7%.
Is Three Bridges bushfire-prone?
Around 100% of Three Bridges is mapped as bushfire-prone, compared with a Yarra Ranges average of 95%.
Is Three Bridges under a flight path?
Aircraft were observed below 3,000 ft over about 2% of Three Bridges, and over about 16% 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 2,000 ft, with an average of 5,500 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 Three Bridges?
The dominant planning zone in Three Bridges is Public Conservation and Resource Zone (PCRZ), though the suburb also includes Rural Conservation Zone (RCZ3) and Green Wedge Zone (GWZ5).
Does Three Bridges have heritage-listed places?
No heritage-listed places are on record within Three Bridges.
What is the typical lot size in Three Bridges?
Across 145 surveyed parcels in Three Bridges, the median lot size is about 21,302 m². There are also 58 registered easements mapped in the suburb.
What is the population of Three Bridges?
At the 2021 Census Three Bridges had 188 usual residents, with a median age of 46 and an average household size of 2.7 people. The wider Yarra Valley statistical area, which contains Three Bridges, went from 15,932 people in 2001 to 17,087 in 2025, up 7%.
Is Three Bridges an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Three Bridges scores 976 and sits in decile 5 of 10 nationally and decile 4 within Victoria (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Three Bridges?
Median household income in Three Bridges was $1,449 a week at the 2021 Census, against $1,999 for the typical suburb in Yarra Ranges. Median rent was $230 a week and the median mortgage repayment $1,867 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Gilderoy | 3.2 km | 4% | 100% |
| Gladysdale | 4.1 km | 3% | 100% |
| Beenak | 6.6 km | Not mapped | 100% |
| Yarra Junction | 7.8 km | 15% | 100% |
| Hoddles Creek | 8.1 km | Not mapped | 100% |
| Powelltown | 8.2 km | <1% | 100% |
| Wesburn | 10.1 km | 3% | 100% |
| Gembrook Cardinia |
10.8 km | 2% | 100% |
| Big Pats Creek | 11.7 km | Not mapped | 100% |
| Launching Place | 12.0 km | 16% | 100% |