Grandchester flood map & planning overlays

91.2% under environmental overlays, mostly a strategic biodiversity corridor.

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A planning-constraint profile of Grandchester (Ipswich City, QLD) - 57.65 km², mapped from live council and state overlay data. This suburb is highly constrained.
Profile updated 7 November 2026.

Planning schematicGrandchester

Constraint readout

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

Flood overlay 14%

below council avg (46%) · #69 of 80 mapped council suburbs

Modelled flood depth held over parts of Grandchester

See the Ipswich flood map by suburb.

Bushfire-prone 87%

1.8× council avg (50%) · #9 of 82 mapped council suburbs

Environmental91%

3.3× council avg (28%) · #2 of 82 in council

Heritage sites 4 Noise corridor 8% Aircraft seen below 3,000 ft 50% Mostly Rural Flood 69th most affected of 80 → Bushfire 9th most affected of 82 →

Elevation hillshade with street names, clipped to Grandchester'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 Grandchester properties?

Counts of properties, not share of land, across 238 analysed Grandchester properties; no individual property result is identified.

Lot-level readout

Properties analysed

238

lot-by-lot flood, slope and elevation

With mapped flood risk

48%

114 of 238 properties

Median ground slope

gently undulating, measured 50 m around each address · 11% of points 15%+

Ground level

76–195 m

AHD, across the suburb

Flood-risk rating across all 238 properties

No mapped risk 124 Very Low 13Low 9Medium 5High 87

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

Has Grandchester flooded? Flood history and overland flow

Yes. Recorded flood mapping reaches into Grandchester: 99 of the 238 properties we analysed (41.6%) sit at least partly inside a mapped historical flood extent (Historic Flood 2011: 99). The free address check says whether a given lot is inside one.

Suburb-wide totals across 238 analysed properties; they do not identify or describe any individual property.

Recorded historical flood mapping

41.6%

99 analysed properties intersect at least one mapped historical event extent.

Historic Flood 2011: 99

Source: Ipswich City Council flood mapping, aggregated by LayeredGeo. Categories are only shown where at least five analysed properties share them. An address-level check is still required to determine whether a particular lot is mapped.

Aircraft noise and flight paths over Grandchester

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

86%

of the suburb, at or below 10,000 ft

Below 3,000 ft

50%

of the suburb's area

Lowest measured

500 ft

averaging 4,000 ft

Busiest square

~1 a day

0 a day below 3,000 ft · ±24% · area average
typical observed square 0 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.

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.

Grandchester at a glance

Parcels 347 Median lot 45,235 m² Mapped easements 40 Bus stops 4 Schools in suburb 1

Schools in and near Grandchester

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: 2.39 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 Grandchester is zoned

Rural 82%

Conservation 12%

Tourism 4%

Special purpose 1%

Community facilities 0%

Township 0%

Selling in Grandchester? 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 57.65 km², Grandchester is highly constrained by planning overlays. About 14% of the suburb sits within a mapped flood overlay, and 87% is flagged bushfire-prone. There are 4 heritage-listed sites on record, and the dominant land-use zone is Rural. The terrain is gently undulating, and the median lot measures about 45,235 m² across 347 parcels.

Who lives in Grandchester

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

Population

467

usual residents, 2021

Median age

years

Median household income

$1,687

per week, Ipswich City suburb typical $1,643

Median rent

$250

per week, Ipswich City suburb typical $300

Median mortgage

$1,517

per month

Household size

2.6

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 4

most disadvantagedleast disadvantaged

Score 953, and decile 5 within Queensland. The national average is 1000.

Relative disadvantage (IRSD) Decile 4

most disadvantagedleast disadvantaged

Age profile

Share of Grandchester's 467 residents in each ABS age band.

0-4 5.8%

5-14 11.9%

15-19 5.4%

20-24 7.1%

25-34 10.6%

35-44 10.4%

45-54 19.9%

55-64 12.3%

65-74 12.5%

75-84 4.1%

85+ 0.0%

Population trend, 2001 to 2025

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

10,905 in 2001 to 16,825 in 2025, up 54%.

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.

Grandchester property market snapshot

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

House sales

$840,000

Median sale price from 315 sales over 12 months to March 2026.

Unit sales

$752,500

Median sale price from 13 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.

Grandchester 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 Grandchester 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 50% of Grandchester. 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 Grandchester. The free check tells you whether one reaches an address; where it does, a Flood Model Report is +$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 Grandchester lot.

Grandchester planning - frequently asked

Is Grandchester flood-prone?

About 14% of Grandchester falls within a mapped flood overlay, against the council-wide suburb average of 46%. Across the suburb, 48% of the 238 properties we analysed carry some level of mapped flood risk, including 87 rated high risk or historically affected. Published flood models are held over parts of Grandchester; the free check on the Flood Model Report page says whether one reaches a given address.

Has Grandchester flooded?

Is Grandchester bushfire-prone?

Around 87% of Grandchester is mapped as bushfire-prone, compared with a Ipswich City average of 50%.

Is Grandchester under a flight path?

Aircraft were observed below 3,000 ft over about 50% of Grandchester, and over about 86% 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 4,000 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 Grandchester?

The dominant planning zone in Grandchester is Rural, though the suburb also includes Conservation and Tourism.

Does Grandchester have heritage-listed places?

Grandchester has 4 heritage-listed places on record.

Is Grandchester hilly or flat?

Grandchester is gently undulating: the median ground slope is about 6%, and 11% of measured points sit on grades of 15% or steeper. Ground level runs from roughly 76 m to 195 m AHD across the suburb.

What is the typical lot size in Grandchester?

Across 347 surveyed parcels in Grandchester, the median lot size is about 45,235 m². There are also 40 registered easements mapped in the suburb.

Does Grandchester have a train station?

There is no train station inside Grandchester itself. The suburb is served by 4 bus stops.

What is the population of Grandchester?

At the 2021 Census Grandchester had 467 usual residents, with a median age of 45 and an average household size of 2.6 people. The wider Rosewood statistical area, which contains Grandchester, went from 10,905 people in 2001 to 16,825 in 2025, up 54%.

Is Grandchester an advantaged suburb?

On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Grandchester scores 953 and sits in decile 4 of 10 nationally and decile 5 within Queensland (decile 1 is the most disadvantaged tenth, decile 10 the least).

What is the median household income in Grandchester?

Median household income in Grandchester was $1,687 a week at the 2021 Census, against $1,643 for the typical suburb in Ipswich City. Median rent was $250 a week and the median mortgage repayment $1,517 a month.

Compare nearby suburbs

Nearby suburb	Distance	Flood mapped	Bushfire-prone
Laidley Lockyer Valley Regional	5.2 km	44%	53%
Summerholm Lockyer Valley Regional	6.2 km	2%	74%
Laidley South Lockyer Valley Regional	6.5 km	56%	52%
Calvert	6.6 km	29%	64%
Lower Mount Walker	7.4 km	26%	34%
Laidley North Lockyer Valley Regional	8.4 km	57%	36%
Mulgowie Lockyer Valley Regional	9.4 km	22%	73%
Laidley Heights Lockyer Valley Regional	9.6 km	33%	40%
Laidley Creek West Lockyer Valley Regional	9.6 km	23%	42%
Woolshed	10.1 km	6%	96%

See all Ipswich City suburb profiles →