Bilpin flood map & planning overlays
A planning-constraint profile of Bilpin
(Hawkesbury, NSW) - 180.3 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
180.3 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Bilpin'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 Bilpin
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 0 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.
Bilpin at a glance
How Bilpin is zoned
Buying in Bilpin? 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 180.3 km², Bilpin is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 100% is flagged bushfire-prone. There is 1 heritage-listed site on record, and the dominant land-use zone is National Parks and Nature Reserves. The median lot measures about 37,630 m² across 376 parcels.
Who lives in Bilpin
Census 2021 figures published by the ABS for the Bilpin 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 1027, and decile 7 within New South Wales. The national average is 1000.
Age profile
Share of Bilpin's 653 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Bilpin - Colo - St Albans, the wider ABS statistical area containing Bilpin. There is no annual population series published at suburb level, so this describes the surrounding area rather than Bilpin itself.
2,518 in 2001 to 2,781 in 2025, up 10%.
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.
Bilpin 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 Bilpin 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 2% of Bilpin. 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 Bilpin. 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 Bilpin lot.
See what's in the $9 report →Bilpin planning - frequently asked
Is Bilpin flood-prone?
Flood mapping covers Bilpin and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 24%). Published flood models are held over parts of Bilpin; the free check on the Flood Model Report page says whether one reaches a given address.
Is Bilpin bushfire-prone?
Around 100% of Bilpin is mapped as bushfire-prone, compared with a Hawkesbury average of 84%.
Is Bilpin under a flight path?
Aircraft were observed below 3,000 ft over about 2% of Bilpin, and over about 23% 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 1,000 ft, with an average of 6,000 ft. At the busiest point in the suburb about 0 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 Bilpin?
The dominant planning zone in Bilpin is National Parks and Nature Reserves, though the suburb also includes Rural Landscape and Environmental Living.
Does Bilpin have heritage-listed places?
Bilpin has 1 heritage-listed place on record.
What is the typical lot size in Bilpin?
Across 376 surveyed parcels in Bilpin, the median lot size is about 37,630 m². There are also 3 registered easements mapped in the suburb.
Does Bilpin have a train station?
There is no train station inside Bilpin itself. The suburb is served by 28 bus stops.
What is the population of Bilpin?
At the 2021 Census Bilpin had 653 usual residents, with a median age of 48 and an average household size of 2.6 people. The wider Bilpin - Colo - St Albans statistical area, which contains Bilpin, went from 2,518 people in 2001 to 2,781 in 2025, up 10%.
Is Bilpin an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Bilpin scores 1027 and sits in decile 8 of 10 nationally and decile 7 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Bilpin?
Median household income in Bilpin was $1,692 a week at the 2021 Census, against $2,160 for the typical suburb in Hawkesbury. Median rent was $410 a week and the median mortgage repayment $2,352 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Tesselate Hill Blue Mountains |
4.8 km | 0% | 100% |
| Mount Irvine Blue Mountains |
8.2 km | 0% | 100% |
| Mountain Lagoon | 8.4 km | 0% | 100% |
| Kurrajong Heights | 10.8 km | 0% | 98% |
| Berambing | 12.5 km | 0% | 100% |
| Wollangambe Lithgow City |
13.0 km | 0% | 100% |
| Wheeny Creek | 13.4 km | 0% | 100% |
| The Devils Wilderness | 13.8 km | 0% | 100% |
| Mount Wilson Blue Mountains |
14.7 km | Not mapped | 100% |
| Kurrajong Hills | 15.0 km | 0% | 100% |