Banksia flood map & planning overlays

A planning-constraint profile of Banksia (Bayside, NSW) - 0.94 km², mapped from live council and state overlay data. This suburb is moderately constrained.
Profile updated 3 October 2026.

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

Planning schematicBanksia

Constraint readout

0.94 km² - this suburb is moderately constrained by planning overlays.

Flood overlay 21%

1.4× council avg (15%) · #7 of 20 mapped council suburbs

Modelled flood depth held over parts of Banksia

Bushfire-prone 0%

below council avg (2%) · #6 of 24 mapped council suburbs

Environmental0%

below council avg (0%) · #2 of 24 in council

Heritage sites 15 Aircraft noise (ANEF) 64% Aircraft seen below 3,000 ft 99% Mostly Low Density Residential Flood 7th most affected of 20 →

Elevation hillshade with street names, clipped to Banksia's boundary, with the flood, bushfire and environmental overlays drawn on top. Amber hatching is the published aircraft noise (ANEF) contour. 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 Banksia

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.

Inside an aircraft noise contour

64%

64% of the suburb's land sits inside a published ANEF or airport-environs contour. Contours vary street by street, so whether a particular lot is inside one needs a property-level check.

Highest contour present

ANEF 30

Under AS 2021, land at ANEF 30 and above is generally unacceptable for new houses and most noise-sensitive uses. The contour is a forecast, not a measurement at any one house.

Contours held

sydney_airport_anef

Observed overflight - sampled 4 Sep to 2 Oct 2026

Under observed aircraft

100%

of the suburb, at or below 10,000 ft

Below 3,000 ft

99%

of the suburb's area

Lowest measured

500 ft

averaging 4,500 ft

Busiest square

~11 a day

7 a day below 3,000 ft · ±28%
typical observed square 6 a day

Night movements: observed, lowest 1,000 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.

Banksia at a glance

Parcels 1,108 Median lot 430 m² Mapped easements 1 Train Banksia Station Bus stops 14

How Banksia is zoned

Low Density Residential 57%

Open Space 20%

Public Recreation 5%

Infrastructure 4%

Medium Density Residential 4%

Mixed Use 3%

Buying in Banksia? 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 0.94 km², Banksia is moderately constrained by planning overlays. About 21% of the suburb sits within a mapped flood overlay. There are 15 heritage-listed sites on record, and the dominant land-use zone is Low Density Residential. The median lot measures about 430 m² across 1,108 parcels.

Who lives in Banksia

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

Population

3,277

usual residents, 2021

Median age

years

Median household income

$2,018

per week, Bayside suburb typical $1,962

Median rent

$500

per week, Bayside suburb typical $500

Median mortgage

$2,500

per month

Household size

2.8

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 8

most disadvantagedleast disadvantaged

Score 1023, and decile 7 within New South Wales. The national average is 1000.

Relative disadvantage (IRSD) Decile 4

most disadvantagedleast disadvantaged

Age profile

Share of Banksia's 3,277 residents in each ABS age band.

0-4 5.6%

5-14 11.5%

15-19 4.9%

20-24 5.9%

25-34 13.6%

35-44 14.4%

45-54 14.2%

55-64 11.3%

65-74 9.8%

75-84 6.6%

85+ 2.3%

Population trend, 2001 to 2025

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

15,904 in 2001 to 23,103 in 2025, up 45%.

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.

Banksia 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)	Inside a held contour	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 Banksia 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 99% of Banksia. 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 Banksia. 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 Banksia lot.

See what's in the $9 report →

Banksia planning - frequently asked

Is Banksia flood-prone?

About 21% of Banksia falls within a mapped flood overlay, against the council-wide suburb average of 15%. Published flood models are held over parts of Banksia; the free check on the Flood Model Report page says whether one reaches a given address.

Is Banksia bushfire-prone?

Bushfire mapping covers Banksia and little to none of it is mapped as bushfire-prone (the Bayside average is 2%).

Is Banksia affected by aircraft noise?

About 64% of Banksia sits inside a published aircraft noise contour, and the highest contour present is ANEF 30 - under AS 2021, land above ANEF 25 is generally considered unacceptable for new houses, and 20-25 conditionally acceptable with noise attenuation. ANEF contours are forecasts published per airport and used to control noise-sensitive development; they are not a measurement at any one house, and a property can sit under a flight path and outside every contour.

Is Banksia under a flight path?

Aircraft were observed below 3,000 ft over about 99% of Banksia, and over about 100% 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 4,500 ft. At the busiest point in the suburb about 11 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 Banksia?

The dominant planning zone in Banksia is Low Density Residential, though the suburb also includes Open Space and Public Recreation.

Does Banksia have heritage-listed places?

Banksia has 15 heritage-listed places on record.

What is the typical lot size in Banksia?

Across 1,108 surveyed parcels in Banksia, the median lot size is about 430 m². There are also 1 registered easements mapped in the suburb.

Does Banksia have a train station?

Yes - Banksia has 1 train station: Banksia Station. It is also served by 14 bus stops.

What is the population of Banksia?

At the 2021 Census Banksia had 3,277 usual residents, with a median age of 41 and an average household size of 2.8 people. The wider Rockdale - Banksia statistical area, which contains Banksia, went from 15,904 people in 2001 to 23,103 in 2025, up 45%.

Is Banksia an advantaged suburb?

On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Banksia scores 1023 and sits in decile 8 of 10 nationally and decile 7 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).

What is the median household income in Banksia?

Median household income in Banksia was $2,018 a week at the 2021 Census, against $1,962 for the typical suburb in Bayside. Median rent was $500 a week and the median mortgage repayment $2,500 a month.

Compare nearby suburbs

Nearby suburb	Distance	Flood mapped	Bushfire-prone
Arncliffe	0.9 km	12%	0%
Rockdale	0.9 km	15%	0%
Kyeemagh	1.4 km	34%	0%
Brighton-Le-Sands	1.5 km	8%	0%
Bardwell Valley	1.7 km	3%	<1%
Wolli Creek	1.8 km	30%	<1%
Turrella	1.8 km	30%	25%
Bardwell Park	2.4 km	7%	19%
Kogarah Georges River	2.6 km	17%	0%
Bexley	2.7 km	1%	0%

See all Bayside suburb profiles →