Karanja flood map & planning overlays
A planning-constraint profile of Karanja
(Derwent Valley, TAS) - 0.46 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 12 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
0.46 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Karanja's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Karanja
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 to
Night movements: not established - night is sampled as often as day, but too few night flights have been seen here to conclude either way.
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.
Karanja at a glance
How Karanja is zoned
Buying in Karanja? The zone and code overlays on this page are the Tasmanian Planning Scheme controls a section 337 certificate reports for a title.
Across its 0.46 km², Karanja is highly constrained by planning overlays. About 10% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. The dominant land-use zone is Rural. The median lot measures about 4,953 m² across 24 parcels.
Who lives in Karanja
Census 2021 figures published by the ABS for the Karanja 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 874, and decile 2 within Tasmania. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Derwent Valley, the wider ABS statistical area containing Karanja. There is no annual population series published at suburb level, so this describes the surrounding area rather than Karanja itself.
2,973 in 2001 to 3,464 in 2025, up 17%.
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.
Karanja 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 Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Bushfire-prone mapping | Mapped | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Zoning | Mapped | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Heritage and environment | Mapped where published | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Aircraft noise contours (ANEF) | Not held | the Tasmanian Planning Scheme and the LIST (Land Tasmania), 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 12 September 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 Karanja 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.
Published flood models are held here: a Flood Model Report is available for about 20 Karanja addresses (+$9 with the planning report).
See what's in the $9 report →Karanja planning - frequently asked
Is Karanja flood-prone?
About 10% of Karanja falls within a mapped flood overlay, against the council-wide suburb average of 8%. Modelled flood depth, velocity and flood level are held for about 20 Karanja addresses, from published flood studies; the free check on the Flood Model Report page says whether a model reaches a given address.
Is Karanja bushfire-prone?
Around 100% of Karanja is mapped as bushfire-prone, compared with a Derwent Valley average of 97%.
Is Karanja under a flight path?
No aircraft were observed over Karanja in the period sampled (recent weeks to now). Sampling is intermittent, so that is a floor rather than proof that none fly over. 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 Karanja?
The dominant planning zone in Karanja is Rural, though the suburb also includes Agriculture and Village.
Does Karanja have heritage-listed places?
No heritage-listed places are on record within Karanja.
What is the typical lot size in Karanja?
Across 24 surveyed parcels in Karanja, the median lot size is about 4,953 m².
Is Karanja an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Karanja scores 874 and sits in decile 1 of 10 nationally and decile 2 within Tasmania (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Glenora | 2.5 km | 18% | 97% |
| Westerway | 3.2 km | 10% | 99% |
| Bushy Park | 5.2 km | 17% | 91% |
| Meadowbank Central Highlands |
6.0 km | 8% | 100% |
| Macquarie Plains | 7.5 km | 29% | 91% |
| Fentonbury Central Highlands |
7.5 km | 3% | 100% |
| National Park | 9.7 km | 6% | 100% |
| Uxbridge | 9.9 km | 4% | 100% |
| Rosegarland | 10.0 km | 7% | 100% |
| Gretna Central Highlands |
10.7 km | 6% | 100% |