Blackett flood map & planning overlays
A planning-constraint profile of Blackett
(Blacktown, NSW) - 1.06 km², mapped from live council and
state overlay data. This suburb is relatively unconstrained.
Profile updated 26 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
1.06 km² - this suburb is relatively unconstrained by planning overlays.
Elevation hillshade with street names, clipped to Blackett'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 Blackett
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 25 Sep 2026
typical observed square 1 a day
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.
Blackett at a glance
How Blackett is zoned
Buying in Blackett? The zoning, flood and bushfire lines on the section 10.7 certificate attached to the contract are mapped controls - see our s10.7 certificate guide.
Across its 1.06 km², Blackett is relatively unconstrained by planning overlays. About 6% of the suburb sits within a mapped flood overlay. There is 1 heritage-listed site on record, and the dominant land-use zone is Low Density Residential. The median lot measures about 624 m² across 1,099 parcels.
Who lives in Blackett
Census 2021 figures published by the ABS for the Blackett 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 802, and decile 1 within New South Wales. The national average is 1000.
Age profile
Share of Blackett's 3,586 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Bidwill - Hebersham - Emerton, the wider ABS statistical area containing Blackett. There is no annual population series published at suburb level, so this describes the surrounding area rather than Blackett itself.
19,819 in 2001 to 18,979 in 2025, down 4%.
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.
Blackett 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 | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Bushfire-prone mapping | Mapped | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Zoning | Mapped | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Heritage and environment | Mapped where published | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Aircraft noise contours (ANEF) | Not held | NSW Government spatial services, NSW ePlanning and published council flood studies, 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 26 September 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 Blackett 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.
Aircraft have been seen below 3,000 ft over about 34% of Blackett. The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Published flood models are held over parts of Blackett. The free check tells you whether one reaches an address; where it does, a Flood Model Report is +$9 with the planning report.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Blackett lot.
See what's in the $9 report →Blackett planning - frequently asked
Is Blackett flood-prone?
About 6% of Blackett falls within a mapped flood overlay, against the council-wide suburb average of 16%. Published flood models are held over parts of Blackett; the free check on the Flood Model Report page says whether one reaches a given address.
Is Blackett bushfire-prone?
Bushfire mapping covers Blackett and little to none of it is mapped as bushfire-prone (the Blacktown average is 21%).
Is Blackett under a flight path?
Aircraft were observed below 3,000 ft over about 34% of Blackett, and over about 52% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 25 Sep 2026). The lowest measured aircraft was at 1,000 ft, with an average of 3,000 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 Blackett?
The dominant planning zone in Blackett is Low Density Residential, though the suburb also includes Public Recreation and Infrastructure.
Does Blackett have heritage-listed places?
Blackett has 1 heritage-listed place on record.
What is the typical lot size in Blackett?
Across 1,099 surveyed parcels in Blackett, the median lot size is about 624 m².
Does Blackett have a train station?
There is no train station inside Blackett itself. The suburb is served by 45 bus stops.
What is the population of Blackett?
At the 2021 Census Blackett had 3,586 usual residents, with a median age of 31 and an average household size of 2.9 people. The wider Bidwill - Hebersham - Emerton statistical area, which contains Blackett, went from 19,819 people in 2001 to 18,979 in 2025, down 4%.
Is Blackett an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Blackett scores 802 and sits in decile 1 of 10 nationally and decile 1 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Blackett?
Median household income in Blackett was $1,174 a week at the 2021 Census, against $2,117 for the typical suburb in Blacktown. Median rent was $310 a week and the median mortgage repayment $1,733 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Emerton | 0.9 km | 10% | 0% |
| Bidwill | 1.1 km | 6% | 6% |
| Hebersham | 1.2 km | 3% | 0% |
| Dharruk | 1.3 km | 9% | 0% |
| Shalvey | 1.4 km | 9% | 8% |
| Lethbridge Park | 1.5 km | 8% | 1% |
| Oakhurst | 1.8 km | 12% | 2% |
| Tregear | 2.2 km | 13% | 21% |
| Whalan | 2.2 km | 11% | 7% |
| Hassall Grove | 2.3 km | 12% | 10% |