Crangan Bay flood map & planning overlays
A planning-constraint profile of Crangan Bay
(Lake Macquarie, NSW) - 6.66 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
6.66 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Crangan Bay'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 Crangan Bay
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.
Crangan Bay at a glance
How Crangan Bay is zoned
Buying in Crangan Bay? 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 6.66 km², Crangan Bay is highly constrained by planning overlays. About 7% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. The dominant land-use zone is National Parks and Nature Reserves. The median lot measures about 581 m² across 366 parcels.
Who lives in Crangan Bay
Census 2021 figures published by the ABS for the Crangan Bay suburb boundary itself, not a wider region.
Population trend, 2001 to 2025
Estimated resident population of Lake Munmorah - Mannering Park, the wider ABS statistical area containing Crangan Bay. There is no annual population series published at suburb level, so this describes the surrounding area rather than Crangan Bay itself.
9,041 in 2001 to 11,084 in 2025, up 23%.
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.
Crangan Bay 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 Crangan Bay 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 22% of Crangan Bay. 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 Crangan Bay lot.
See what's in the $9 report →Crangan Bay planning - frequently asked
Is Crangan Bay flood-prone?
About 7% of Crangan Bay falls within a mapped flood overlay, against the council-wide suburb average of 7%.
Is Crangan Bay bushfire-prone?
Around 100% of Crangan Bay is mapped as bushfire-prone, compared with a Lake Macquarie average of 65%.
Is Crangan Bay under a flight path?
Aircraft were observed below 3,000 ft over about 22% of Crangan Bay, and over about 41% 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 3,000 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 Crangan Bay?
The dominant planning zone in Crangan Bay is National Parks and Nature Reserves, though the suburb also includes Environmental Management and Deferred Matter.
Does Crangan Bay have heritage-listed places?
No heritage-listed places are on record within Crangan Bay.
What is the typical lot size in Crangan Bay?
Across 366 surveyed parcels in Crangan Bay, the median lot size is about 581 m². There are also 1 registered easements mapped in the suburb.
Does Crangan Bay have a train station?
There is no train station inside Crangan Bay itself. The suburb is served by 19 bus stops.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Chain Valley Bay Central Coast |
2.0 km | 21% | 90% |
| Moonee | 2.1 km | Not mapped | 94% |
| Nords Wharf | 2.7 km | 4% | 88% |
| Frazer Park Central Coast |
2.8 km | Not mapped | 98% |
| Wybung Central Coast |
2.9 km | 0% | 99% |
| Catherine Hill Bay | 3.0 km | Not mapped | 94% |
| Freemans Central Coast |
3.3 km | 23% | 100% |
| Gwandalan Central Coast |
3.4 km | 14% | 60% |
| Lake Munmorah Central Coast |
3.7 km | 20% | 75% |
| Kingfisher Shores Central Coast |
3.8 km | 45% | 94% |