Mangrove Mountain flood map & planning overlays

A planning-constraint profile of Mangrove Mountain (Central Coast, NSW) - 76.92 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.

Planning schematicMangrove Mountain

Constraint readout

76.92 km² - this suburb is highly constrained by planning overlays.

Flood overlay 0%

below council avg (30%) · #145 of 148 mapped council suburbs

Modelled flood depth held over parts of Mangrove Mountain

Bushfire-prone 92%

1.3× council avg (69%) · #42 of 150 mapped council suburbs

Environmental32%

≈ council avg (38%) · #77 of 150 in council

Heritage sites 5 Aircraft seen below 3,000 ft 34% Mostly Primary Production Bushfire 42nd most affected of 150 →

Elevation hillshade with street names, clipped to Mangrove Mountain'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 Mangrove Mountain

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

Under observed aircraft

70%

of the suburb, at or below 10,000 ft

Below 3,000 ft

34%

of the suburb's area

Lowest measured

500 ft

averaging 3,500 ft

Busiest square

~10 a day

1 a day below 3,000 ft · ±24%
typical observed square 1 a day

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.

Mangrove Mountain at a glance

Parcels 303 Median lot 134,927 m² Mapped easements 9 Bus stops 30

How Mangrove Mountain is zoned

Primary Production 44%

National Parks and Nature Reserves 20%

Forestry 14%

Environmental Conservation 12%

Public Recreation 4%

Rural Landscape 4%

Buying in Mangrove Mountain? 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 76.92 km², Mangrove Mountain is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 92% is flagged bushfire-prone. There are 5 heritage-listed sites on record, and the dominant land-use zone is Primary Production. The median lot measures about 134,927 m² across 303 parcels.

Who lives in Mangrove Mountain

Census 2021 figures published by the ABS for the Mangrove Mountain suburb boundary itself, not a wider region.

Population

736

usual residents, 2021

Median age

years

Median household income

$1,816

per week, Central Coast suburb typical $1,735

Median rent

$369

per week, Central Coast suburb typical $400

Median mortgage

$2,600

per month

Household size

3.0

people, average

Socio-economic standing

ABS SEIFA 2021 ranks every Australian suburb. Decile 1 is the most disadvantaged tenth of the country, decile 10 the least.

Advantage and disadvantage (IRSAD) Decile 7

most disadvantagedleast disadvantaged

Score 1013, and decile 6 within New South Wales. The national average is 1000.

Relative disadvantage (IRSD) Decile 6

most disadvantagedleast disadvantaged

Age profile

Share of Mangrove Mountain's 736 residents in each ABS age band.

0-4 4.9%

5-14 11.8%

15-19 6.9%

20-24 6.8%

25-34 11.1%

35-44 10.3%

45-54 14.1%

55-64 16.8%

65-74 9.5%

75-84 6.1%

85+ 1.5%

Population trend, 2001 to 2025

Estimated resident population of Calga - Kulnura, the wider ABS statistical area containing Mangrove Mountain. There is no annual population series published at suburb level, so this describes the surrounding area rather than Mangrove Mountain 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.

Mangrove Mountain 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 Mangrove Mountain 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 34% of Mangrove Mountain. 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 Mangrove Mountain. 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 Mangrove Mountain lot.

See what's in the $9 report →

Mangrove Mountain planning - frequently asked

Is Mangrove Mountain flood-prone?

Flood mapping covers Mangrove Mountain and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 30%). Published flood models are held over parts of Mangrove Mountain; the free check on the Flood Model Report page says whether one reaches a given address.

Is Mangrove Mountain bushfire-prone?

Around 92% of Mangrove Mountain is mapped as bushfire-prone, compared with a Central Coast average of 69%.

Is Mangrove Mountain under a flight path?

Aircraft were observed below 3,000 ft over about 34% of Mangrove Mountain, and over about 70% 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 500 ft, with an average of 3,500 ft. At the busiest point in the suburb about 10 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 Mangrove Mountain?

The dominant planning zone in Mangrove Mountain is Primary Production, though the suburb also includes National Parks and Nature Reserves and Forestry.

Does Mangrove Mountain have heritage-listed places?

Mangrove Mountain has 5 heritage-listed places on record.

What is the typical lot size in Mangrove Mountain?

Across 303 surveyed parcels in Mangrove Mountain, the median lot size is about 134,927 m². There are also 9 registered easements mapped in the suburb.

Does Mangrove Mountain have a train station?

There is no train station inside Mangrove Mountain itself. The suburb is served by 30 bus stops.

What is the population of Mangrove Mountain?

At the 2021 Census Mangrove Mountain had 736 usual residents, with a median age of 43 and an average household size of 3.0 people. The wider Calga - Kulnura statistical area, which contains Mangrove Mountain, went from 4,793 people in 2001 to 4,678 in 2025, down 2%.

Is Mangrove Mountain an advantaged suburb?

On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Mangrove Mountain scores 1013 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 Mangrove Mountain?

Median household income in Mangrove Mountain was $1,816 a week at the 2021 Census, against $1,735 for the typical suburb in Central Coast. Median rent was $369 a week and the median mortgage repayment $2,600 a month.

Compare nearby suburbs

Nearby suburb	Distance	Flood mapped	Bushfire-prone
Peats Ridge	5.2 km	Not mapped	80%
Mangrove Creek	5.9 km	<1%	100%
Upper Mangrove	6.5 km	0%	100%
Greengrove	6.6 km	13%	96%
Central Mangrove	7.2 km	<1%	93%
Ten Mile Hollow Hawkesbury	9.0 km	0%	100%
Glenworth Valley	9.3 km	12%	94%
Lower Mangrove	9.8 km	16%	93%
Calga	10.4 km	<1%	96%
Somersby	11.4 km	<1%	92%

See all Central Coast suburb profiles →