Ten Mile Hollow flood map & planning overlays
A planning-constraint profile of Ten Mile Hollow
(Hawkesbury, NSW) - 4.59 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
4.59 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Ten Mile Hollow'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 Ten Mile Hollow
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
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.
Ten Mile Hollow at a glance
How Ten Mile Hollow is zoned
Buying in Ten Mile Hollow? 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 4.59 km², Ten Mile Hollow 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 are 4 heritage-listed sites on record, and the dominant land-use zone is National Parks and Nature Reserves. The median lot measures about 819,178 m² across 7 parcels.
Who lives in Ten Mile Hollow
Census 2021 figures published by the ABS for the Ten Mile Hollow 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 1010, and decile 6 within New South Wales. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Bilpin - Colo - St Albans, the wider ABS statistical area containing Ten Mile Hollow. There is no annual population series published at suburb level, so this describes the surrounding area rather than Ten Mile Hollow 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.
Ten Mile Hollow 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 Ten Mile Hollow 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 1% of Ten Mile Hollow. 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 an indicative AS 2870 site class for a Ten Mile Hollow lot.
See what's in the $9 report →Ten Mile Hollow planning - frequently asked
Is Ten Mile Hollow flood-prone?
Flood mapping covers Ten Mile Hollow and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 24%).
Is Ten Mile Hollow bushfire-prone?
Around 100% of Ten Mile Hollow is mapped as bushfire-prone, compared with a Hawkesbury average of 84%.
Is Ten Mile Hollow under a flight path?
Aircraft were observed below 3,000 ft over about 1% of Ten Mile Hollow, and over about 35% 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 2,000 ft, with an average of 5,000 ft. 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 Ten Mile Hollow?
The dominant planning zone in Ten Mile Hollow is National Parks and Nature Reserves, though the suburb also includes Environmental Living.
Does Ten Mile Hollow have heritage-listed places?
Ten Mile Hollow has 4 heritage-listed places on record.
What is the typical lot size in Ten Mile Hollow?
Across 7 surveyed parcels in Ten Mile Hollow, the median lot size is about 819,178 m².
Is Ten Mile Hollow an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Ten Mile Hollow scores 1010 and sits in decile 7 of 10 nationally and decile 6 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Wrights Creek | 4.5 km | 0% | 100% |
| Upper Mangrove Central Coast |
4.7 km | 0% | 100% |
| Mangrove Creek Central Coast |
5.5 km | <1% | 100% |
| Mangrove Mountain Central Coast |
9.0 km | 0% | 92% |
| Gunderman Central Coast |
9.1 km | 9% | 96% |
| Greengrove Central Coast |
9.4 km | 13% | 96% |
| St Albans | 9.8 km | 0% | 100% |
| Lower Mangrove Central Coast |
10.1 km | 16% | 93% |
| Central Macdonald | 10.8 km | 0% | 100% |
| Lower Macdonald | 11.7 km | 2% | 99% |