Seven Hills flood map & planning overlays
A planning-constraint profile of Seven Hills
(Blacktown, NSW) - 9.67 km², mapped from live council and
state overlay data. This suburb is relatively unconstrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
9.67 km² - this suburb is relatively unconstrained by planning overlays.
Elevation hillshade with street names, clipped to Seven Hills'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 Seven Hills
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 2 Oct 2026
typical observed square 2 a day
Night movements: observed, lowest 500 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.
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.
Seven Hills at a glance
How Seven Hills is zoned
Buying in Seven Hills? 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 9.67 km², Seven Hills is relatively unconstrained by planning overlays. About 10% of the suburb sits within a mapped flood overlay. There are 13 heritage-listed sites on record, and the dominant land-use zone is Low Density Residential. The median lot measures about 590 m² across 6,969 parcels.
Who lives in Seven Hills
Census 2021 figures published by the ABS for the Seven Hills 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 996, and decile 5 within New South Wales. The national average is 1000.
Age profile
Share of Seven Hills's 20,095 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Lalor Park - Kings Langley, the wider ABS statistical area containing Seven Hills. There is no annual population series published at suburb level, so this describes the surrounding area rather than Seven Hills itself.
25,036 in 2001 to 25,958 in 2025, up 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.
Seven Hills 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 3 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 Seven Hills 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 98% of Seven Hills. 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 Seven Hills. 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 Seven Hills lot.
See what's in the $9 report →Seven Hills planning - frequently asked
Is Seven Hills flood-prone?
About 10% of Seven Hills falls within a mapped flood overlay, against the council-wide suburb average of 16%. Published flood models are held over parts of Seven Hills; the free check on the Flood Model Report page says whether one reaches a given address.
Is Seven Hills bushfire-prone?
Bushfire mapping covers Seven Hills and little to none of it is mapped as bushfire-prone (the Blacktown average is 21%).
Is Seven Hills under a flight path?
Aircraft were observed below 3,000 ft over about 98% of Seven Hills, and over about 100% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 2 Oct 2026). The lowest measured aircraft was at 500 ft, with an average of 2,000 ft. At the busiest point in the suburb about 12 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 Seven Hills?
The dominant planning zone in Seven Hills is Low Density Residential, though the suburb also includes General Industrial and Infrastructure.
Does Seven Hills have heritage-listed places?
Seven Hills has 13 heritage-listed places on record.
What is the typical lot size in Seven Hills?
Across 6,969 surveyed parcels in Seven Hills, the median lot size is about 590 m². There are also 12 registered easements mapped in the suburb.
Does Seven Hills have a train station?
Yes - Seven Hills has 1 train station: Seven Hills Station. It is also served by 272 bus stops.
What is the population of Seven Hills?
At the 2021 Census Seven Hills had 20,095 usual residents, with a median age of 37 and an average household size of 2.8 people. The wider Lalor Park - Kings Langley statistical area, which contains Seven Hills, went from 25,036 people in 2001 to 25,958 in 2025, up 4%.
Is Seven Hills an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Seven Hills scores 996 and sits in decile 6 of 10 nationally and decile 5 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Seven Hills?
Median household income in Seven Hills was $1,892 a week at the 2021 Census, against $2,117 for the typical suburb in Blacktown. Median rent was $400 a week and the median mortgage repayment $2,200 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Lalor Park | 1.9 km | 8% | 0% |
| Toongabbie City Of Parramatta |
2.6 km | 6% | 0% |
| Girraween Cumberland |
2.6 km | 0% | 0% |
| Kings Langley | 3.0 km | 7% | 0% |
| Blacktown | 3.1 km | 10% | 3% |
| Old Toongabbie City Of Parramatta |
3.2 km | 0% | 2% |
| Pendle Hill Cumberland |
3.4 km | Not mapped | 0% |
| Constitution Hill City Of Parramatta |
4.1 km | 0% | 0% |
| Winston Hills City Of Parramatta |
4.2 km | 0% | 9% |
| Wentworthville Cumberland |
4.4 km | Not mapped | 0% |