Seacliff flood map & planning overlays
A planning-constraint profile of Seacliff
(City of Holdfast Bay, SA) - 0.99 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
0.99 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Seacliff'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 Seacliff
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.
Seacliff at a glance
How Seacliff is zoned
Selling in Seacliff? 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 0.99 km², Seacliff is highly constrained by planning overlays. About 43% of the suburb sits within a mapped flood overlay. There are 21 heritage-listed sites on record, and the dominant land-use zone is Established Neighbourhood. The median lot measures about 456 m² across 1,267 parcels.
Who lives in Seacliff
Census 2021 figures published by the ABS for the Seacliff 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 1064, and decile 10 within South Australia. The national average is 1000.
Age profile
Share of Seacliff's 2,117 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Brighton (SA), the wider ABS statistical area containing Seacliff. There is no annual population series published at suburb level, so this describes the surrounding area rather than Seacliff itself.
13,086 in 2001 to 15,899 in 2025, up 21%.
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.
Seacliff 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 Seacliff 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 11% of Seacliff. 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 Seacliff lot.
See what's in the $9 report →Seacliff planning - frequently asked
Is Seacliff flood-prone?
About 43% of Seacliff falls within a mapped flood overlay, against the council-wide suburb average of 54%.
Is Seacliff bushfire-prone?
Bushfire mapping covers Seacliff and little to none of it is mapped as bushfire-prone.
Is Seacliff under a flight path?
Aircraft were observed below 3,000 ft over about 11% of Seacliff, and over about 58% 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 1,500 ft, with an average of 3,000 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 Seacliff?
The dominant planning zone in Seacliff is Established Neighbourhood, though the suburb also includes Open Space and Master Planned Neighbourhood.
Does Seacliff have heritage-listed places?
Seacliff has 21 heritage-listed places on record.
What is the typical lot size in Seacliff?
Across 1,267 surveyed parcels in Seacliff, the median lot size is about 456 m².
Does Seacliff have a train station?
There is no train station inside Seacliff itself. The suburb is served by 12 bus stops.
What is the population of Seacliff?
At the 2021 Census Seacliff had 2,117 usual residents, with a median age of 46 and an average household size of 2.4 people. The wider Brighton (SA) statistical area, which contains Seacliff, went from 13,086 people in 2001 to 15,899 in 2025, up 21%.
Is Seacliff an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Seacliff scores 1064 and sits in decile 9 of 10 nationally and decile 10 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Seacliff?
Median household income in Seacliff was $1,931 a week at the 2021 Census, against $1,681 for the typical suburb in City of Holdfast Bay. Median rent was $350 a week and the median mortgage repayment $1,950 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Kingston Park | 0.5 km | 54% | 0% |
| South Brighton | 1.0 km | 57% | 0% |
| Seacliff Park City of Marion |
1.1 km | 16% | 0% |
| Marino City of Marion |
1.7 km | 14% | 0% |
| Seaview Downs City of Marion |
1.7 km | 11% | 0% |
| Dover Gardens City of Marion |
1.9 km | 58% | 0% |
| Brighton | 2.0 km | 59% | 0% |
| Seacombe Heights City of Marion |
2.3 km | 15% | 2% |
| Hove | 2.6 km | 50% | 0% |
| Seacombe Gardens City of Marion |
2.7 km | 50% | 0% |