Karragarra Island flood map & planning overlays
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.
Everything below is suburb-wide. Overlays change block to block - see which ones actually touch your lot. The map is free.
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. It shows where constraints fall; the interactive map shows them on your exact address.
Karragarra Island flood risk at the property level
Overlay percentages say how much land is constrained; these figures say how many properties are actually touched, from our lot-by-lot analysis of 292 Karragarra Island properties.
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.
Karragarra Island at a glance
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 40% 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 690 m² across 288 parcels. These figures are suburb-wide - the overlays that actually apply to a given lot can differ block to block, which is what a property-level check tells you.
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: Australian Bureau of Statistics. Census of Population and Housing 2021 (General Community Profile) and SEIFA 2021, both published at the Suburbs and Localities level; Regional Population (estimated resident population) at Statistical Area Level 2. Used under CC BY 4.0. Census counts of small populations are randomly adjusted by the ABS to protect confidentiality, so figures for small suburbs are indicative.
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 →Karragarra Island planning - frequently asked
Where can I see a flood map of Karragarra Island?
The schematic on this page is a Karragarra Island flood map: the mapped flood overlays drawn over the suburb's terrain and street grid, covering about 40% of the suburb. Flood lines vary block to block, so for a specific property use the free interactive map - search any Karragarra Island address and it shows the flood, zoning and bushfire mapping on the exact lot boundary.
Is Karragarra Island flood-prone?
About 40% of Karragarra Island falls within a mapped flood overlay, against a Redland City average of 22%. Looking lot by lot, 52% of the 292 properties we analysed in Karragarra Island carry some level of mapped flood risk, including 120 rated high risk or historically affected. Flood overlays vary block to block, so whether a particular lot is affected needs a property-level check.
Is Karragarra Island bushfire-prone?
Yes - around 12% of Karragarra Island is mapped as bushfire-prone, compared with a Redland City average of 41%. A bushfire-prone designation can trigger additional building requirements, so check the specific address.
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. Zoning sets what you can build and do on a site, and can differ lot by lot.
Does Karragarra Island have heritage-listed places?
No heritage-listed places are on record within Karragarra Island. Even so, it is worth confirming for an individual property before any works.
Is Karragarra Island hilly or flat?
Karragarra Island is largely flat: the median lot slope is about 2%. Ground level runs from roughly 0 m to 5 m AHD across the suburb. Slope drives site costs - cut and fill, retaining walls and driveway grades - so it is worth knowing before you commit to a sloping block.
What is the typical lot size in Karragarra Island?
Across 288 surveyed parcels in Karragarra Island, the median lot size is about 690 m². There are also 2 registered easements mapped in the suburb - an easement can restrict where you can build, so always check the title and overlays for the specific lot.
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%. ABS publishes no annual population series for individual suburbs, so that trend describes the surrounding area rather than Karragarra Island alone.
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 being the most disadvantaged tenth of Australian suburbs and decile 10 the least. The national average score is 1000. SEIFA summarises income, education, occupation and housing across the whole suburb, so it describes the area, not any particular household in it.
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. These are 2021 Census figures and have not been indexed to today.
Do I need a planning report for a Karragarra Island property?
A Karragarra Island planning report pulls every overlay - zoning, flood, bushfire, heritage and environmental - that touches a single lot, on live council and state data. The interactive map preview is free; a full PDF report is $9.