Mount Cotton flood map & planning overlays

Mount Cotton is Redland City's youngest, best-paid and most landslide-mapped suburb.

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A planning-constraint profile of Mount Cotton (Redland City, QLD) - 42.55 km², mapped from live council and state overlay data. This suburb is highly constrained.
Profile updated 7 November 2026.

Planning schematicMount Cotton

Constraint readout

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

Flood overlay 19%

below council avg (26%) · #17 of 23 mapped council suburbs

Modelled flood depth held for about 30 addresses here

See the Redland flood map by suburb.

Bushfire-prone 93%

2.3× council avg (41%) · #2 of 23 mapped council suburbs

Environmental72%

≈ council avg (64%) · #12 of 23 in council

Heritage sites 2 Noise corridor 6% Aircraft seen below 3,000 ft 99% Mostly Rural Flood 17th most affected of 23 → Bushfire 2nd most affected of 23 →

Elevation hillshade with street names, clipped to Mount Cotton'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

How common is mapped flood risk across Mount Cotton properties?

Counts of properties, not share of land, across 2,589 analysed Mount Cotton properties; no individual property result is identified.

Lot-level readout

Properties analysed

2,589

lot-by-lot flood, slope and elevation

With mapped flood risk

10%

257 of 2,589 properties

Median ground slope

gently undulating, measured 50 m around each address · 5% of points 15%+

Ground level

13–95 m

AHD, across the suburb

Flood-risk rating across all 2,589 properties

No mapped risk 2,332 Low 257

From LayeredGeo's lot-risk engine: council flood overlays, historical flooding and terrain, resolved to each individual lot in Mount Cotton.

Aircraft noise and flight paths over Mount Cotton

The ANEF contour is a published planning forecast and observed overflight is what a sampled tracking feed recorded - neither describes any individual property.

Observed overflight - sampled 4 Sep to 7 Nov 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 3,000 ft

Busiest square

~38 a day

4 a day below 3,000 ft · ±11%
typical observed square 2 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.

How this is measured

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.

Mount Cotton at a glance

Parcels 2,599 Median lot 770 m² Mapped easements 577 Bus stops 12 Schools in suburb 1 Landslide overlay 46%

Schools in and near Mount Cotton

Public school-location data shows availability across the suburb; it does not rate schools or assign any individual address to a catchment.

Inside the suburb boundary

1 school providing primary years and 0 providing secondary years. A combined school may be counted in both teaching levels.

Nearest school availability

Primary: inside the suburb

Secondary: 1.72 km from the suburb boundary

Source: Queensland Government school geographic information. Catchment boundaries can divide a suburb and change over time; use the official catchment finder for a specific address.

How Mount Cotton is zoned

Rural 71%

Conservation 20%

Low Density Residential 6%

Recreation and Open Space 2%

Community Facilities 1%

Local Centre 0%

Selling in Mount Cotton? The lot-level zone is the zoning Part 3 of Queensland's Form 2 seller disclosure statement asks for - see our Form 2 planning data guide.

Across its 42.55 km², Mount Cotton is highly constrained by planning overlays. About 19% of the suburb sits within a mapped flood overlay, and 93% is flagged bushfire-prone. There are 2 heritage-listed sites on record, and the dominant land-use zone is Rural. The terrain is gently undulating, and the median lot measures about 770 m² across 2,599 parcels.

Who lives in Mount Cotton

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

Population

7,302

usual residents, 2021

Median age

years

Median household income

$2,640

per week, Redland City suburb typical $1,488

Median rent

$475

per week, Redland City suburb typical $385

Median mortgage

$2,100

per month

Household size

3.1

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 1074, and decile 10 within Queensland. The national average is 1000.

Relative disadvantage (IRSD) Decile 10

most disadvantagedleast disadvantaged

Age profile

Share of Mount Cotton's 7,302 residents in each ABS age band.

0-4 8.3%

5-14 17.6%

15-19 6.6%

20-24 4.5%

25-34 13.2%

35-44 17.9%

45-54 14.7%

55-64 9.7%

65-74 5.2%

75-84 1.8%

85+ 0.5%

Population trend, 2001 to 2025

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

4,392 in 2001 to 8,742 in 2025, up 99%.

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.

Mount Cotton property market snapshot

Queensland Government publishes this as a SA2 market series for Sheldon - Mount Cotton, the wider statistical area containing Mount Cotton. It is not a valuation and is not specific to this suburb or any individual property.

House sales

$1,260,000

Median sale price from 141 sales over 12 months to March 2026.

Source: Queensland Government Statistician's Office (QGSO). View the source profile. The same SA2 figure can appear on several suburb pages within that statistical area.

Mount Cotton 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	the relevant council planning scheme and Queensland Government spatial data
Bushfire-prone mapping	Mapped	the relevant council planning scheme and Queensland Government spatial data
Zoning	Mapped	the relevant council planning scheme and Queensland Government spatial data
Heritage and environment	Mapped where published	the relevant council planning scheme and Queensland Government spatial data
Aircraft noise contours (ANEF)	Not held	the relevant council planning scheme and Queensland Government spatial data, Defence
Observed flight paths	Observed	adsb.lol, under the Open Database License
Demographics	Available	Australian Bureau of Statistics (2021 Census and SEIFA)
School availability	Available	Queensland Government
Market statistics	Available at SA2 level	Queensland Government Statistician's Office (QGSO)

Profile last materially updated 7 November 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 Mount Cotton 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.

See what's in the $9 report →

Aircraft have been seen below 3,000 ft over about 99% of Mount Cotton. 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 here: a Flood Model Report is available for about 30 Mount Cotton addresses (+$9 with the planning report).

The Terrain Report shows the fall of the block - contours, cross sections and a 3D model of the lot to spin round in your browser (+$9 with the planning report).

Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and the indicative soil reactivity range to expect for a Mount Cotton lot.

Mount Cotton planning - frequently asked

Is Mount Cotton flood-prone?

About 19% of Mount Cotton falls within a mapped flood overlay, against the council-wide suburb average of 26%. Across the suburb, 10% of the 2,589 properties we analysed carry some level of mapped flood risk. Modelled flood depth, velocity and flood level are held for about 30 Mount Cotton addresses, from published flood studies; the free check on the Flood Model Report page says whether a model reaches a given address.

Is Mount Cotton bushfire-prone?

Around 93% of Mount Cotton is mapped as bushfire-prone, compared with a Redland City average of 41%.

Is Mount Cotton under a flight path?

Aircraft were observed below 3,000 ft over about 99% of Mount Cotton, and over about 100% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 7 Nov 2026). The lowest measured aircraft was at 500 ft, with an average of 3,000 ft. At the busiest point in the suburb about 38 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 Mount Cotton?

The dominant planning zone in Mount Cotton is Rural, though the suburb also includes Conservation and Low Density Residential.

Does Mount Cotton have heritage-listed places?

Mount Cotton has 2 heritage-listed places on record.

Is Mount Cotton hilly or flat?

Mount Cotton is gently undulating: the median ground slope is about 7%, and 5% of measured points sit on grades of 15% or steeper. Ground level runs from roughly 13 m to 95 m AHD across the suburb.

What is the typical lot size in Mount Cotton?

Across 2,599 surveyed parcels in Mount Cotton, the median lot size is about 770 m². There are also 577 registered easements mapped in the suburb.

Does Mount Cotton have a train station?

There is no train station inside Mount Cotton itself. The suburb is served by 12 bus stops.

What is the population of Mount Cotton?

At the 2021 Census Mount Cotton had 7,302 usual residents, with a median age of 34 and an average household size of 3.1 people. The wider Sheldon - Mount Cotton statistical area, which contains Mount Cotton, went from 4,392 people in 2001 to 8,742 in 2025, up 99%.

Is Mount Cotton an advantaged suburb?

On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Mount Cotton scores 1074 and sits in decile 10 of 10 nationally and decile 10 within Queensland (decile 1 is the most disadvantaged tenth, decile 10 the least).

What is the median household income in Mount Cotton?

Median household income in Mount Cotton was $2,640 a week at the 2021 Census, against $1,488 for the typical suburb in Redland City. Median rent was $475 a week and the median mortgage repayment $2,100 a month.

Compare nearby suburbs

Nearby suburb	Distance	Flood mapped	Bushfire-prone
Sheldon	4.2 km	12%	97%
Cornubia Logan City	4.4 km	39%	77%
Priestdale Logan City	5.5 km	23%	97%
Shailer Park Logan City	5.5 km	27%	27%
Daisy Hill Logan City	5.8 km	29%	59%
Carbrook Logan City	6.7 km	73%	80%
Thornlands	7.2 km	22%	50%
Loganholme Logan City	7.4 km	87%	34%
Tanah Merah Logan City	7.4 km	50%	32%
Redland Bay	7.5 km	25%	71%

See all Redland City suburb profiles →