Constitution Hill flood map & planning overlays

A planning-constraint profile of Constitution Hill (City Of Parramatta, NSW) - 1.23 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 schematicConstitution Hill

Constraint readout

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

Flood overlay 0%

below council avg (1%) · #2 of 8 mapped council suburbs

Modelled flood depth held over parts of Constitution Hill

Bushfire-prone 0%

below council avg (6%) · #13 of 25 mapped council suburbs

Environmental0%

below council avg (5%) · #15 of 25 in council

Heritage sites 3 Aircraft seen below 3,000 ft 100% Mostly Low Density Residential

Elevation hillshade with street names, clipped to Constitution Hill'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 Constitution Hill

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

100%

of the suburb, at or below 10,000 ft

Below 3,000 ft

100%

of the suburb's area

Lowest measured

500 ft

averaging 3,000 ft

Busiest square

~10 a day

6 a day below 3,000 ft · ±28%
typical observed square 4 a day

Night movements: observed, lowest 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.

Constitution Hill at a glance

Parcels 1,125 Median lot 580 m² Mapped easements 4 Bus stops 33

How Constitution Hill is zoned

Low Density Residential 80%

Infrastructure 8%

Medium Density Residential 6%

Public Recreation 4%

Natural Waterways 1%

Local Centre 1%

Buying in Constitution Hill? 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 1.23 km², Constitution Hill is relatively unconstrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay. There are 3 heritage-listed sites on record, and the dominant land-use zone is Low Density Residential. The median lot measures about 580 m² across 1,125 parcels.

Who lives in Constitution Hill

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

Population

4,030

usual residents, 2021

Median age

years

Median household income

$1,706

per week, City Of Parramatta suburb typical $1,993

Median rent

$410

per week, City Of Parramatta suburb typical $440

Median mortgage

$2,167

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 6

most disadvantagedleast disadvantaged

Score 998, and decile 6 within New South Wales. The national average is 1000.

Relative disadvantage (IRSD) Decile 3

most disadvantagedleast disadvantaged

Age profile

Share of Constitution Hill's 4,030 residents in each ABS age band.

0-4 5.3%

5-14 13.6%

15-19 6.3%

20-24 6.2%

25-34 14.4%

35-44 13.1%

45-54 13.8%

55-64 12.1%

65-74 8.3%

75-84 5.2%

85+ 1.6%

Population trend, 2001 to 2025

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

19,164 in 2001 to 23,933 in 2025, up 25%.

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.

Constitution Hill 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 Constitution Hill 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 100% of Constitution Hill. 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 Constitution Hill. 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 Constitution Hill lot.

See what's in the $9 report →

Constitution Hill planning - frequently asked

Is Constitution Hill flood-prone?

Flood mapping covers Constitution Hill and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 1%). Published flood models are held over parts of Constitution Hill; the free check on the Flood Model Report page says whether one reaches a given address.

Is Constitution Hill bushfire-prone?

Bushfire mapping covers Constitution Hill and little to none of it is mapped as bushfire-prone (the City Of Parramatta average is 6%).

Is Constitution Hill under a flight path?

Aircraft were observed below 3,000 ft over about 100% of Constitution Hill, in the period sampled (4 Sep 2026 to 2 Oct 2026). The lowest measured aircraft was at 500 ft, with an average of 3,000 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 Constitution Hill?

The dominant planning zone in Constitution Hill is Low Density Residential, though the suburb also includes Infrastructure and Medium Density Residential.

Does Constitution Hill have heritage-listed places?

Constitution Hill has 3 heritage-listed places on record.

What is the typical lot size in Constitution Hill?

Across 1,125 surveyed parcels in Constitution Hill, the median lot size is about 580 m². There are also 4 registered easements mapped in the suburb.

Does Constitution Hill have a train station?

There is no train station inside Constitution Hill itself. The suburb is served by 33 bus stops.

What is the population of Constitution Hill?

At the 2021 Census Constitution Hill had 4,030 usual residents, with a median age of 38 and an average household size of 2.8 people. The wider Toongabbie - Constitution Hill statistical area, which contains Constitution Hill, went from 19,164 people in 2001 to 23,933 in 2025, up 25%.

Is Constitution Hill an advantaged suburb?

On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Constitution Hill scores 998 and sits in decile 6 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 Constitution Hill?

Median household income in Constitution Hill was $1,706 a week at the 2021 Census, against $1,993 for the typical suburb in City Of Parramatta. Median rent was $410 a week and the median mortgage repayment $2,167 a month.

Compare nearby suburbs

Nearby suburb	Distance	Flood mapped	Bushfire-prone
Old Toongabbie	0.9 km	0%	2%
Toongabbie	1.6 km	6%	0%
Wentworthville Cumberland	1.7 km	Not mapped	0%
Winston Hills	1.9 km	0%	9%
Westmead Cumberland	2.0 km	Not mapped	0%
Pendle Hill Cumberland	2.2 km	Not mapped	0%
Northmead	2.3 km	0%	22%
Girraween Cumberland	2.9 km	0%	0%
North Parramatta	3.0 km	Not mapped	30%
South Wentworthville Cumberland	3.2 km	Not mapped	0%

See all City Of Parramatta suburb profiles →