Box Hill flood map & planning overlays
A planning-constraint profile of Box Hill
(The Hills Shire, NSW) - 9.43 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
9.43 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Box Hill'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 Box Hill
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 3 a day
Night movements: observed, lowest 1,500 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.
Box Hill at a glance
How Box Hill is zoned
Buying in Box Hill? 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 9.43 km², Box Hill is highly constrained by planning overlays. About 20% of the suburb sits within a mapped flood overlay, and 18% is flagged bushfire-prone. There are 8 heritage-listed sites on record, and the dominant land-use zone is Low Density Residential. The median lot measures about 331 m² across 7,716 parcels.
Who lives in Box Hill
Census 2021 figures published by the ABS for the Box Hill 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 1150, and decile 10 within New South Wales. The national average is 1000.
Age profile
Share of Box Hill's 6,450 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Box Hill - Nelson, the wider ABS statistical area containing Box Hill. There is no annual population series published at suburb level, so this describes the surrounding area rather than Box Hill itself.
1,826 in 2001 to 26,348 in 2025, up 1343%.
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.
Box Hill 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 Box Hill 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 51% of Box Hill. 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 Box Hill. 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 Box Hill lot.
See what's in the $9 report →Box Hill planning - frequently asked
Is Box Hill flood-prone?
About 20% of Box Hill falls within a mapped flood overlay, against the council-wide suburb average of 9%. Published flood models are held over parts of Box Hill; the free check on the Flood Model Report page says whether one reaches a given address.
Is Box Hill bushfire-prone?
Around 18% of Box Hill is mapped as bushfire-prone, compared with a The Hills Shire average of 62%.
Is Box Hill under a flight path?
Aircraft were observed below 3,000 ft over about 51% of Box Hill, and over about 65% 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 6 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 Box Hill?
The dominant planning zone in Box Hill is Low Density Residential, though the suburb also includes Medium Density Residential and Infrastructure.
Does Box Hill have heritage-listed places?
Box Hill has 8 heritage-listed places on record.
What is the typical lot size in Box Hill?
Across 7,716 surveyed parcels in Box Hill, the median lot size is about 331 m². There are also 26 registered easements mapped in the suburb.
Does Box Hill have a train station?
There is no train station inside Box Hill itself. The suburb is served by 148 bus stops.
What is the population of Box Hill?
At the 2021 Census Box Hill had 6,450 usual residents, with a median age of 31 and an average household size of 3.3 people. The wider Box Hill - Nelson statistical area, which contains Box Hill, went from 1,826 people in 2001 to 26,348 in 2025, up 1343%.
Is Box Hill an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Box Hill scores 1150 and sits in decile 10 of 10 nationally and decile 10 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Box Hill?
Median household income in Box Hill was $2,881 a week at the 2021 Census, against $2,650 for the typical suburb in The Hills Shire. Median rent was $580 a week and the median mortgage repayment $3,000 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Grantham Farm Blacktown |
1.9 km | 9% | 47% |
| Rouse Hill Blacktown |
2.9 km | 4% | 50% |
| Nelson | 2.9 km | 1% | 100% |
| Gables | 3.0 km | <1% | 40% |
| Riverstone Blacktown |
3.3 km | 22% | 11% |
| Oakville Hawkesbury |
3.8 km | 23% | 95% |
| Richards Blacktown |
4.1 km | 68% | 73% |
| Vineyard Hawkesbury |
4.1 km | 72% | 88% |
| Tallawong Blacktown |
4.1 km | 12% | 29% |
| Annangrove | 4.5 km | 2% | 94% |