D'Estrees Bay flood map & planning overlays

A planning-constraint profile of D'Estrees Bay (Kangaroo Island Council, SA) - 58.56 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.

Planning schematicD'Estrees Bay

Constraint readout

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

Flood overlay 2%

below council avg (7%) · #20 of 49 mapped council suburbs

Bushfire-prone 99%

≈ council avg (96%) · #27 of 49 mapped council suburbs

Environmental71%

1.9× council avg (38%) · #7 of 49 in council

Heritage sites 2 Character 6% Aircraft seen below 3,000 ft 1% Mostly Conservation Flood 20th most affected of 49 → Bushfire 27th most affected of 49 →

Elevation hillshade with street names, clipped to D'Estrees Bay'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 D'Estrees Bay

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

Under observed aircraft

of the suburb, at or below 10,000 ft

Below 3,000 ft

of the suburb's area

Lowest measured

500 ft

averaging 4,000 ft

How often

not established

aircraft were seen, but not often enough to put a rate on

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.

D'Estrees Bay at a glance

Parcels 82 Median lot 102,663 m²

How D'Estrees Bay is zoned

Conservation 72%

Rural 21%

Rural Shack Settlement 6%

Coastal Waters and Offshore Islands 1%

Selling in D'Estrees Bay? The zone and overlays on this page are the Planning and Design Code controls a Form 1 vendor's statement has to disclose.

Across its 58.56 km², D'Estrees Bay is highly constrained by planning overlays. About 2% of the suburb sits within a mapped flood overlay, and 99% is flagged bushfire-prone. There are 2 heritage-listed sites on record, and the dominant land-use zone is Conservation. The median lot measures about 102,663 m² across 82 parcels.

Who lives in D'Estrees Bay

Census 2021 figures published by the ABS for the D'Estrees Bay suburb boundary itself, not a wider region.

Population

usual residents, 2021

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 6

most disadvantagedleast disadvantaged

Score 992, and decile 6 within South Australia. The national average is 1000.

Relative disadvantage (IRSD) Decile 7

most disadvantagedleast disadvantaged

Population trend, 2001 to 2025

Estimated resident population of Kangaroo Island, the wider ABS statistical area containing D'Estrees Bay. There is no annual population series published at suburb level, so this describes the surrounding area rather than D'Estrees Bay itself.

4,227 in 2001 to 5,212 in 2025, up 23%.

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.

D'Estrees Bay 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 South Australian Planning and Design Code and Location SA spatial data
Bushfire-prone mapping	Mapped	the South Australian Planning and Design Code and Location SA spatial data
Zoning	Mapped	the South Australian Planning and Design Code and Location SA spatial data
Heritage and environment	Mapped where published	the South Australian Planning and Design Code and Location SA spatial data
Aircraft noise contours (ANEF)	Not held	the South Australian Planning and Design Code and Location SA spatial data, 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 D'Estrees Bay 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.

Aircraft have been seen below 3,000 ft over about 1% of D'Estrees Bay. The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.

Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a D'Estrees Bay lot.

See what's in the $9 report →

D'Estrees Bay planning - frequently asked

Is D'Estrees Bay flood-prone?

About 2% of D'Estrees Bay falls within a mapped flood overlay, against the council-wide suburb average of 7%.

Is D'Estrees Bay bushfire-prone?

Around 99% of D'Estrees Bay is mapped as bushfire-prone, compared with a Kangaroo Island Council average of 96%.

Is D'Estrees Bay under a flight path?

Aircraft were observed below 3,000 ft over about 1% of D'Estrees Bay, and over about 5% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 3 Oct 2026). The lowest measured aircraft was at 500 ft, with an average of 4,000 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 D'Estrees Bay?

The dominant planning zone in D'Estrees Bay is Conservation, though the suburb also includes Rural and Rural Shack Settlement.

Does D'Estrees Bay have heritage-listed places?

D'Estrees Bay has 2 heritage-listed places on record.

What is the typical lot size in D'Estrees Bay?

Across 82 surveyed parcels in D'Estrees Bay, the median lot size is about 102,663 m².

Is D'Estrees Bay an advantaged suburb?

On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), D'Estrees Bay scores 992 and sits in decile 6 of 10 nationally and decile 6 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).

Compare nearby suburbs

Nearby suburb	Distance	Flood mapped	Bushfire-prone
Macgillivray	11.4 km	0%	100%
Haines	15.8 km	<1%	100%
Muston	21.5 km	4%	96%
Birchmore	22.2 km	0%	100%
Seal Bay	23.8 km	0%	100%
Nepean Bay	25.1 km	16%	90%
Pelican Lagoon	25.6 km	10%	94%
American River	25.8 km	30%	71%
Kohinoor	25.8 km	0%	100%
Sapphiretown	26.1 km	60%	47%

See all Kangaroo Island Council suburb profiles →