Lower Mangrove flood map & planning overlays
A planning-constraint profile of Lower Mangrove
(Central Coast, NSW) - 16.56 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
16.56 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Lower Mangrove'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 Lower Mangrove
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: observed, lowest 5,500 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.
Lower Mangrove at a glance
How Lower Mangrove is zoned
Buying in Lower Mangrove? 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 16.56 km², Lower Mangrove is highly constrained by planning overlays. About 16% of the suburb sits within a mapped flood overlay, and 93% is flagged bushfire-prone. The dominant land-use zone is National Parks and Nature Reserves. The median lot measures about 118,624 m² across 63 parcels.
Who lives in Lower Mangrove
Census 2021 figures published by the ABS for the Lower Mangrove 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 918, and decile 2 within New South Wales. The national average is 1000.
Age profile
Share of Lower Mangrove's 70 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Calga - Kulnura, the wider ABS statistical area containing Lower Mangrove. There is no annual population series published at suburb level, so this describes the surrounding area rather than Lower Mangrove itself.
4,793 in 2001 to 4,678 in 2025, down 2%.
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.
Lower Mangrove 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 Lower Mangrove 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 27% of Lower Mangrove. 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 Lower Mangrove. 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 Lower Mangrove lot.
See what's in the $9 report →Lower Mangrove planning - frequently asked
Is Lower Mangrove flood-prone?
About 16% of Lower Mangrove falls within a mapped flood overlay, against the council-wide suburb average of 30%. Published flood models are held over parts of Lower Mangrove; the free check on the Flood Model Report page says whether one reaches a given address.
Is Lower Mangrove bushfire-prone?
Around 93% of Lower Mangrove is mapped as bushfire-prone, compared with a Central Coast average of 69%.
Is Lower Mangrove under a flight path?
Aircraft were observed below 3,000 ft over about 27% of Lower Mangrove, and over about 43% 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 3,500 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 Lower Mangrove?
The dominant planning zone in Lower Mangrove is National Parks and Nature Reserves, though the suburb also includes Environmental Conservation and Recreational Waterways.
Does Lower Mangrove have heritage-listed places?
No heritage-listed places are on record within Lower Mangrove.
What is the typical lot size in Lower Mangrove?
Across 63 surveyed parcels in Lower Mangrove, the median lot size is about 118,624 m².
Does Lower Mangrove have a train station?
There is no train station inside Lower Mangrove itself. The suburb is served by 4 bus stops.
What is the population of Lower Mangrove?
At the 2021 Census Lower Mangrove had 70 usual residents, with a median age of 53 and an average household size of 2.1 people. The wider Calga - Kulnura statistical area, which contains Lower Mangrove, went from 4,793 people in 2001 to 4,678 in 2025, down 2%.
Is Lower Mangrove an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Lower Mangrove scores 918 and sits in decile 2 of 10 nationally and decile 2 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Lower Mangrove?
Median household income in Lower Mangrove was $1,312 a week at the 2021 Census, against $1,735 for the typical suburb in Central Coast. Median rent was $380 a week and the median mortgage repayment $1,467 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Greengrove | 3.4 km | 13% | 96% |
| Glenworth Valley | 4.3 km | 12% | 94% |
| Spencer | 4.7 km | 19% | 87% |
| Mangrove Creek | 5.3 km | <1% | 100% |
| Wendoree Park | 6.4 km | 28% | 80% |
| Gunderman | 7.4 km | 9% | 96% |
| Marlow | 7.8 km | 46% | 83% |
| Mount White | 7.9 km | 5% | 95% |
| Calga | 8.1 km | <1% | 96% |
| Singletons Mill Hornsby |
8.7 km | 32% | 89% |