St Albans flood map & planning overlays
A planning-constraint profile of St Albans
(Hawkesbury, NSW) - 107.39 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
107.39 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to St Albans'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 St Albans
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 4 a day
Night movements: observed, lowest 3,500 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.
St Albans at a glance
How St Albans is zoned
Buying in St Albans? 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 107.39 km², St Albans 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 28 heritage-listed sites on record, and the dominant land-use zone is National Parks and Nature Reserves. The median lot measures about 12,557 m² across 258 parcels.
Who lives in St Albans
Census 2021 figures published by the ABS for the St Albans 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.
Age profile
Share of St Albans's 161 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 St Albans. There is no annual population series published at suburb level, so this describes the surrounding area rather than St Albans 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.
St Albans 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 St Albans 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 13% of St Albans. 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 St Albans lot.
See what's in the $9 report →St Albans planning - frequently asked
Is St Albans flood-prone?
Flood mapping covers St Albans and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 24%).
Is St Albans bushfire-prone?
Around 100% of St Albans is mapped as bushfire-prone, compared with a Hawkesbury average of 84%.
Is St Albans under a flight path?
Aircraft were observed below 3,000 ft over about 13% of St Albans, and over about 36% 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 5,000 ft. At the busiest point in the suburb about 5 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 St Albans?
The dominant planning zone in St Albans is National Parks and Nature Reserves, though the suburb also includes Environmental Living and Environmental Conservation.
Does St Albans have heritage-listed places?
St Albans has 28 heritage-listed places on record.
What is the typical lot size in St Albans?
Across 258 surveyed parcels in St Albans, the median lot size is about 12,557 m². There are also 9 registered easements mapped in the suburb.
Does St Albans have a train station?
There is no train station inside St Albans itself. The suburb is served by 26 bus stops.
What is the population of St Albans?
At the 2021 Census St Albans had 161 usual residents, with a median age of 56 and an average household size of 2.1 people. The wider Bilpin - Colo - St Albans statistical area, which contains St Albans, went from 2,518 people in 2001 to 2,781 in 2025, up 10%.
Is St Albans an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), St Albans 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).
What is the median household income in St Albans?
Median household income in St Albans was $919 a week at the 2021 Census, against $2,160 for the typical suburb in Hawkesbury. Median rent was $275 a week and the median mortgage repayment $1,733 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Wrights Creek | 5.3 km | 0% | 100% |
| Fernances | 6.9 km | 0% | 100% |
| Upper Macdonald | 8.0 km | 0% | 100% |
| Central Macdonald | 9.7 km | 0% | 100% |
| Ten Mile Hollow | 9.8 km | 0% | 100% |
| Perrys Crossing | 9.8 km | 0% | 100% |
| Upper Mangrove Central Coast |
10.9 km | 0% | 100% |
| Lower Macdonald | 12.2 km | 2% | 99% |
| Mogo Creek | 13.1 km | 0% | 100% |
| Webbs Creek | 13.9 km | 1% | 100% |