Karragarra Island flood map & planning overlays
47.2% of Karragarra Island is flood-mapped, 3rd in Redland City. Island life, low ground.
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A planning-constraint profile of Karragarra Island
(Redland City, QLD) - 2.42 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 7 November 2026.
Constraint readout
2.42 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Karragarra Island'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 Karragarra Island properties?
Counts of properties, not share of land, across 292 analysed Karragarra Island properties; no individual property result is identified.
Lot-level readout
Flood-risk rating across all 292 properties
From LayeredGeo's lot-risk engine: council flood overlays, historical flooding and terrain, resolved to each individual lot in Karragarra Island.
Aircraft noise and flight paths over Karragarra Island
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
typical observed square 1 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.
Karragarra Island at a glance
Schools in and near Karragarra Island
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
0 schools providing primary years and 0 providing secondary years. A combined school may be counted in both teaching levels.
Nearest school availability
Primary: 0.82 km from the suburb boundary
Secondary: 8.12 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 Karragarra Island is zoned
Selling in Karragarra Island? 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 2.42 km², Karragarra Island is highly constrained by planning overlays. About 47% of the suburb sits within a mapped flood overlay, and 12% is flagged bushfire-prone. The dominant land-use zone is Character Residential. The terrain is largely flat, and the median lot measures about 689 m² across 287 parcels.
Who lives in Karragarra Island
Census 2021 figures published by the ABS for the Karragarra Island suburb boundary itself, not a wider region.
Socio-economic standing
ABS SEIFA 2021 ranks every Australian suburb. Decile 1 is the most disadvantaged tenth of the country, decile 10 the least.
Score 904, and decile 2 within Queensland. The national average is 1000.
Age profile
Share of Karragarra Island's 240 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Southern Moreton Bay Islands, the wider ABS statistical area containing Karragarra Island. There is no annual population series published at suburb level, so this describes the surrounding area rather than Karragarra Island itself.
3,857 in 2001 to 10,466 in 2025, up 171%.
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.
Karragarra Island property market snapshot
Queensland Government publishes this as a SA2 market series for Southern Moreton Bay Islands, the wider statistical area containing Karragarra Island. It is not a valuation and is not specific to this suburb or any individual property.
House sales
Median sale price from 644 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.
Karragarra Island 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 Karragarra Island 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 100% of Karragarra Island. 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 Karragarra Island. 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 Karragarra Island lot.
Karragarra Island planning - frequently asked
Is Karragarra Island flood-prone?
About 47% of Karragarra Island falls within a mapped flood overlay, against the council-wide suburb average of 26%. Across the suburb, 52% of the 292 properties we analysed carry some level of mapped flood risk, including 118 rated high risk or historically affected. Published flood models are held over parts of Karragarra Island; the free check on the Flood Model Report page says whether one reaches a given address.
Is Karragarra Island bushfire-prone?
Around 12% of Karragarra Island is mapped as bushfire-prone, compared with a Redland City average of 41%.
Is Karragarra Island under a flight path?
Aircraft were observed below 3,000 ft over about 100% of Karragarra Island, in the period sampled (4 Sep 2026 to 7 Nov 2026). The lowest measured aircraft was at 500 ft, with an average of 2,000 ft. At the busiest point in the suburb about 2 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 Karragarra Island?
The dominant planning zone in Karragarra Island is Character Residential, though the suburb also includes Conservation and Rural.
Does Karragarra Island have heritage-listed places?
No heritage-listed places are on record within Karragarra Island.
Is Karragarra Island hilly or flat?
Karragarra Island is largely flat: the median ground slope is about 2%. Ground level runs from roughly 0 m to 5 m AHD across the suburb.
What is the typical lot size in Karragarra Island?
Across 287 surveyed parcels in Karragarra Island, the median lot size is about 689 m². There are also 2 registered easements mapped in the suburb.
Does Karragarra Island have a train station?
There is no train station inside Karragarra Island itself. The suburb is served by 1 ferry terminal.
What is the population of Karragarra Island?
At the 2021 Census Karragarra Island had 240 usual residents, with a median age of 63 and an average household size of 1.8 people. The wider Southern Moreton Bay Islands statistical area, which contains Karragarra Island, went from 3,857 people in 2001 to 10,466 in 2025, up 171%.
Is Karragarra Island an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Karragarra Island scores 904 and sits in decile 2 of 10 nationally and decile 2 within Queensland (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Karragarra Island?
Median household income in Karragarra Island was $872 a week at the 2021 Census, against $1,488 for the typical suburb in Redland City. Median rent was $268 a week and the median mortgage repayment $867 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Lamb Island | 2.1 km | 34% | 17% |
| Russell Island | 3.9 km | 48% | 39% |
| Macleay Island | 4.1 km | 34% | 22% |
| Redland Bay | 8.5 km | 25% | 71% |
| Coochiemudlo Island | 8.9 km | 31% | 20% |
| Victoria Point | 9.4 km | 30% | 28% |
| North Stradbroke Island | 10.3 km | 10% | 87% |
| Moreton Bay | 11.0 km | 9% | <1% |
| Steiglitz Gold Coast City |
11.6 km | 98% | 13% |
| Carbrook Logan City |
12.2 km | 73% | 80% |