Collaroy Plateau flood map & planning overlays

A planning-constraint profile of Collaroy Plateau (Northern Beaches, NSW) - 1.22 km², mapped from live council and state overlay data. This suburb is relatively unconstrained.
Profile updated 3 October 2026.

Suburb-wide figures; the free map shows which overlays touch your lot.

Planning schematicCollaroy Plateau

Constraint readout

1.22 km² - this suburb is relatively unconstrained by planning overlays.

Flood overlay 0%

below council avg (12%) · #46 of 52 mapped council suburbs

Modelled flood depth held over parts of Collaroy Plateau

Bushfire-prone 10%

below council avg (47%) · #46 of 56 mapped council suburbs

Environmental0%

below council avg (26%) · #43 of 56 in council

Heritage sites 4 Aircraft seen below 3,000 ft 96% Mostly Low Density Residential Bushfire 46th most affected of 56 →

Elevation hillshade with street names, clipped to Collaroy Plateau'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 Collaroy Plateau

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

96%

of the suburb, at or below 10,000 ft

Below 3,000 ft

96%

of the suburb's area

Lowest measured

500 ft

averaging 3,500 ft

Busiest square

~2 a day

2 a day below 3,000 ft · ±23% · area average
typical observed square 1 a day

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.

Collaroy Plateau at a glance

Parcels 1,536 Median lot 500 m² Mapped easements 6 Bus stops 48 Landslide overlay 100%

How Collaroy Plateau is zoned

Low Density Residential 94%

Public Recreation 5%

Local Centre 0%

General Industrial 0%

Special Activities 0%

Environmental Conservation 0%

Buying in Collaroy Plateau? 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 1.22 km², Collaroy Plateau is relatively unconstrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 10% is flagged bushfire-prone. There are 4 heritage-listed sites on record, and the dominant land-use zone is Low Density Residential. The median lot measures about 500 m² across 1,536 parcels.

Who lives in Collaroy Plateau

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

Population

4,805

usual residents, 2021

Median age

years

Median household income

$3,278

per week, Northern Beaches suburb typical $2,778

Median rent

$800

per week, Northern Beaches suburb typical $700

Median mortgage

$3,467

per month

Household size

3.2

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 10

most disadvantagedleast disadvantaged

Score 1137, and decile 10 within New South Wales. The national average is 1000.

Relative disadvantage (IRSD) Decile 10

most disadvantagedleast disadvantaged

Age profile

Share of Collaroy Plateau's 4,805 residents in each ABS age band.

0-4 5.9%

5-14 16.4%

15-19 8.1%

20-24 5.9%

25-34 7.6%

35-44 13.9%

45-54 17.1%

55-64 11.9%

65-74 7.6%

75-84 4.3%

85+ 1.5%

Population trend, 2001 to 2025

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

12,409 in 2001 to 14,229 in 2025, up 15%.

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.

Collaroy Plateau 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 Collaroy Plateau 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 96% of Collaroy Plateau. 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 Collaroy Plateau. 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 Collaroy Plateau lot.

See what's in the $9 report →

Collaroy Plateau planning - frequently asked

Is Collaroy Plateau flood-prone?

Flood mapping covers Collaroy Plateau and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 12%). Published flood models are held over parts of Collaroy Plateau; the free check on the Flood Model Report page says whether one reaches a given address.

Is Collaroy Plateau bushfire-prone?

Around 10% of Collaroy Plateau is mapped as bushfire-prone, compared with a Northern Beaches average of 47%.

Is Collaroy Plateau under a flight path?

Aircraft were observed below 3,000 ft over about 96% of Collaroy Plateau, 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 2 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 Collaroy Plateau?

The dominant planning zone in Collaroy Plateau is Low Density Residential, though the suburb also includes Public Recreation and Local Centre.

Does Collaroy Plateau have heritage-listed places?

Collaroy Plateau has 4 heritage-listed places on record.

What is the typical lot size in Collaroy Plateau?

Across 1,536 surveyed parcels in Collaroy Plateau, the median lot size is about 500 m². There are also 6 registered easements mapped in the suburb.

Does Collaroy Plateau have a train station?

There is no train station inside Collaroy Plateau itself. The suburb is served by 48 bus stops.

What is the population of Collaroy Plateau?

At the 2021 Census Collaroy Plateau had 4,805 usual residents, with a median age of 40 and an average household size of 3.2 people. The wider Collaroy - Collaroy Plateau statistical area, which contains Collaroy Plateau, went from 12,409 people in 2001 to 14,229 in 2025, up 15%.

Is Collaroy Plateau an advantaged suburb?

On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Collaroy Plateau scores 1137 and sits in decile 10 of 10 nationally and decile 10 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).

What is the median household income in Collaroy Plateau?

Median household income in Collaroy Plateau was $3,278 a week at the 2021 Census, against $2,778 for the typical suburb in Northern Beaches. Median rent was $800 a week and the median mortgage repayment $3,467 a month.

Compare nearby suburbs

Nearby suburb	Distance	Flood mapped	Bushfire-prone
Wheeler Heights	0.9 km	8%	13%
Collaroy	1.0 km	2%	23%
Narrabeen	2.1 km	62%	27%
Dee Why	2.3 km	28%	10%
Cromer	2.4 km	14%	55%
Narraweena	2.7 km	10%	8%
North Narrabeen	3.0 km	49%	28%
North Curl Curl	3.6 km	40%	6%
Beacon Hill	3.8 km	3%	49%
Elanora Heights	3.8 km	5%	60%

See all Northern Beaches suburb profiles →