Delahey flood map & planning overlays
Delahey houses 8,077 people, median 39, on 534 m² blocks.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of Delahey
(Brimbank, VIC) - 3.56 km², mapped from live council and
state overlay data. This suburb is moderately constrained.
Profile updated 24 October 2026.
Constraint readout
3.56 km² - this suburb is moderately constrained by planning overlays.
Elevation hillshade with street names, clipped to Delahey'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 Delahey
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
typical observed square 1 a day
Night movements: observed, lowest 2,000 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.
Delahey at a glance
How Delahey is zoned
Selling in Delahey? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 3.56 km², Delahey is moderately constrained by planning overlays. About 2% of the suburb sits within a mapped flood overlay. There is 1 heritage-listed site on record, and the dominant land-use zone is Neighbourhood Residential Zone (NRZ1). The median lot measures about 534 m² across 3,042 parcels.
Who lives in Delahey
Census 2021 figures published by the ABS for the Delahey 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 902, and decile 1 within Victoria. The national average is 1000.
Age profile
Share of Delahey's 8,077 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Delahey, the wider ABS statistical area containing Delahey. There is no annual population series published at suburb level, so this describes the surrounding area rather than Delahey itself.
8,056 in 2001 to 7,859 in 2025, down 2%.
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.
Delahey 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 Delahey 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 35% of Delahey. 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 Delahey lot.
Delahey planning - frequently asked
Is Delahey flood-prone?
About 2% of Delahey falls within a mapped flood overlay, against the council-wide suburb average of 6%.
Is Delahey bushfire-prone?
Bushfire mapping covers Delahey and little to none of it is mapped as bushfire-prone (the Brimbank average is 15%).
Is Delahey under a flight path?
Aircraft were observed below 3,000 ft over about 35% of Delahey, and over about 77% 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 500 ft, with an average of 5,000 ft. At the busiest point in the suburb about 1 aircraft a day were recorded passing over one 500 m square. 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 Delahey?
The dominant planning zone in Delahey is Neighbourhood Residential Zone (NRZ1), though the suburb also includes Special Use Zone (SUZ2) and Public Use Zone (PUZ2).
Does Delahey have heritage-listed places?
Delahey has 1 heritage-listed place on record.
What is the typical lot size in Delahey?
Across 3,042 surveyed parcels in Delahey, the median lot size is about 534 m². There are also 1,235 registered easements mapped in the suburb.
Does Delahey have a train station?
There is no train station inside Delahey itself. The suburb is served by 30 bus stops.
What is the population of Delahey?
At the 2021 Census Delahey had 8,077 usual residents, with a median age of 39 and an average household size of 2.8 people. The wider Delahey statistical area, which contains Delahey, went from 8,056 people in 2001 to 7,859 in 2025, down 2%.
Is Delahey an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Delahey scores 902 and sits in decile 2 of 10 nationally and decile 1 within Victoria (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Delahey?
Median household income in Delahey was $1,486 a week at the 2021 Census, against $1,486 for the typical suburb in Brimbank. Median rent was $350 a week and the median mortgage repayment $1,517 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Kings Park | 1.7 km | 4% | <1% |
| Taylors Hill Melton |
2.1 km | 1% | 0% |
| Burnside Heights Melton |
2.4 km | 3% | 7% |
| Keilor Downs | 2.4 km | 5% | 11% |
| Taylors Lakes | 2.5 km | 8% | 3% |
| Sydenham | 2.8 km | 3% | <1% |
| Keilor Lodge | 3.1 km | 3% | 2% |
| Albanvale | 3.1 km | 2% | 0% |
| Caroline Springs Melton |
3.7 km | 3% | 4% |
| Burnside Melton |
4.2 km | 6% | 2% |