Wallacia flood map & planning overlays

A planning-constraint profile of Wallacia (Liverpool, NSW) - 25.56 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.

Planning schematicWallacia

Constraint readout

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

Flood overlay 31%

1.3× council avg (24%) · #9 of 37 mapped council suburbs

Modelled flood depth held over parts of Wallacia

Bushfire-prone 88%

2.1× council avg (41%) · #3 of 37 mapped council suburbs

Environmental7%

1.8× council avg (4%) · #6 of 37 in council

Heritage sites 23 Noise corridor 19% Aircraft noise (ANEF) 19% Aircraft seen below 3,000 ft 36% Mostly Primary Production Flood 9th most affected of 37 → Bushfire 3rd most affected of 37 →

Elevation hillshade with street names, clipped to Wallacia'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 Wallacia

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

19%

19% 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

NSW planning (EPI) airport noise

Observed overflight - sampled 4 Sep to 2 Oct 2026

Under observed aircraft

75%

of the suburb, at or below 10,000 ft

Below 3,000 ft

36%

of the suburb's area

Lowest measured

500 ft

averaging 5,000 ft

Busiest square

~1 a day

1 a day below 3,000 ft · ±30% · area average
typical observed square 1 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.

Wallacia at a glance

Parcels 618 Median lot 4,002 m² Mapped easements 9 Bus stops 35

How Wallacia is zoned

Primary Production 73%

Rural Landscape 11%

Environmental Management 6%

Large Lot Residential 3%

Infrastructure 2%

Primary Production Small Lots 2%

Buying in Wallacia? 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 25.56 km², Wallacia is highly constrained by planning overlays. About 31% of the suburb sits within a mapped flood overlay, and 88% is flagged bushfire-prone. There are 23 heritage-listed sites on record, and the dominant land-use zone is Primary Production. The median lot measures about 4,002 m² across 618 parcels.

Who lives in Wallacia

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

Population

1,711

usual residents, 2021

Median age

years

Median household income

$2,004

per week, Liverpool suburb typical $1,959

Median rent

$400

per week, Liverpool suburb typical $486

Median mortgage

$2,500

per month

Household size

2.9

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 6

most disadvantagedleast disadvantaged

Score 997, and decile 5 within New South Wales. The national average is 1000.

Relative disadvantage (IRSD) Decile 5

most disadvantagedleast disadvantaged

Age profile

Share of Wallacia's 1,711 residents in each ABS age band.

0-4 6.7%

5-14 13.3%

15-19 6.8%

20-24 6.3%

25-34 11.0%

35-44 12.4%

45-54 13.1%

55-64 13.0%

65-74 11.4%

75-84 5.0%

85+ 0.9%

Population trend, 2001 to 2025

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

5,948 in 2001 to 13,282 in 2025, up 123%.

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.

Wallacia 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 Wallacia 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 36% of Wallacia. 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 Wallacia. 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 Wallacia lot.

See what's in the $9 report →

Wallacia planning - frequently asked

Is Wallacia flood-prone?

About 31% of Wallacia falls within a mapped flood overlay, against the council-wide suburb average of 24%. Published flood models are held over parts of Wallacia; the free check on the Flood Model Report page says whether one reaches a given address.

Is Wallacia bushfire-prone?

Around 88% of Wallacia is mapped as bushfire-prone, compared with a Liverpool average of 41%.

Is Wallacia affected by aircraft noise?

About 19% of Wallacia 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 Wallacia under a flight path?

Aircraft were observed below 3,000 ft over about 36% of Wallacia, and over about 75% 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 5,000 ft. At the busiest point in the suburb about 1 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 Wallacia?

The dominant planning zone in Wallacia is Primary Production, though the suburb also includes Rural Landscape and Environmental Management.

Does Wallacia have heritage-listed places?

Wallacia has 23 heritage-listed places on record.

What is the typical lot size in Wallacia?

Across 618 surveyed parcels in Wallacia, the median lot size is about 4,002 m². There are also 9 registered easements mapped in the suburb.

Does Wallacia have a train station?

There is no train station inside Wallacia itself. The suburb is served by 35 bus stops.

What is the population of Wallacia?

At the 2021 Census Wallacia had 1,711 usual residents, with a median age of 38 and an average household size of 2.9 people. The wider Mulgoa - Luddenham - Orchard Hills statistical area, which contains Wallacia, went from 5,948 people in 2001 to 13,282 in 2025, up 123%.

Is Wallacia an advantaged suburb?

On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Wallacia scores 997 and sits in decile 6 of 10 nationally and decile 5 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).

What is the median household income in Wallacia?

Median household income in Wallacia was $2,004 a week at the 2021 Census, against $1,959 for the typical suburb in Liverpool. Median rent was $400 a week and the median mortgage repayment $2,500 a month.

Compare nearby suburbs

Nearby suburb	Distance	Flood mapped	Bushfire-prone
Warragamba Wollondilly	3.8 km	2%	88%
Greendale	4.5 km	14%	96%
Silverdale Wollondilly	5.5 km	<1%	92%
Luddenham	6.2 km	4%	80%
Bringelly	8.0 km	3%	80%
Mulgoa Penrith	8.7 km	5%	97%
Bradfield	9.0 km	14%	76%
Badgerys Creek	9.7 km	16%	57%
Mount Portal Blue Mountains	9.7 km	6%	100%
Theresa Park Wollondilly	10.4 km	0%	74%

See all Liverpool suburb profiles →