Castra flood map & planning overlays
A planning-constraint profile of Castra
(Central Coast, TAS) - 15.56 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
15.56 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Castra'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
Aircraft noise and flight paths over Castra
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 4 Sep to 3 Oct 2026
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.
Castra at a glance
How Castra is zoned
Buying in Castra? The zone and code overlays on this page are the Tasmanian Planning Scheme controls a section 337 certificate reports for a title.
Across its 15.56 km², Castra is highly constrained by planning overlays. About 6% 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 102,399 m² across 35 parcels.
Who lives in Castra
Census 2021 figures published by the ABS for the Castra 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 950, and decile 6 within Tasmania. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Burnie - Ulverstone Surrounds, the wider ABS statistical area containing Castra. There is no annual population series published at suburb level, so this describes the surrounding area rather than Castra itself.
5,410 in 2001 to 5,426 in 2025, up 0%.
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.
Castra 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 3 October 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 Castra 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.
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 20 Castra addresses (+$9 with the planning report).
See what's in the $9 report →Castra planning - frequently asked
Is Castra flood-prone?
About 6% of Castra falls within a mapped flood overlay, against the council-wide suburb average of 10%. Modelled flood depth, velocity and flood level are held for about 20 Castra addresses, from published flood studies; the free check on the Flood Model Report page says whether a model reaches a given address.
Is Castra bushfire-prone?
Around 100% of Castra is mapped as bushfire-prone, compared with a Central Coast average of 96%.
Is Castra under a flight path?
Aircraft were observed over about 2% of Castra in the period sampled, but only above 3,000 ft - the lowest measured was 4,500 ft. 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 Castra?
The dominant planning zone in Castra is Rural, though the suburb also includes Agriculture.
Does Castra have heritage-listed places?
No heritage-listed places are on record within Castra.
What is the typical lot size in Castra?
Across 35 surveyed parcels in Castra, the median lot size is about 102,399 m².
Is Castra an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Castra scores 950 and sits in decile 3 of 10 nationally and decile 6 within Tasmania (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Upper Castra | 3.8 km | 6% | 100% |
| Sprent | 4.1 km | 8% | 100% |
| Preston | 4.3 km | 6% | 100% |
| Spalford | 8.1 km | 8% | 100% |
| South Preston | 9.1 km | 7% | 100% |
| Lower Wilmot Kentish |
9.2 km | 6% | 100% |
| Gawler | 9.2 km | 9% | 100% |
| Gunns Plains | 9.8 km | 15% | 100% |
| Nietta | 10.0 km | 7% | 100% |
| Kindred | 10.2 km | 11% | 100% |