Seaview Downs flood map & planning overlays
A planning-constraint profile of Seaview Downs
(City of Marion, SA) - 2.29 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 26 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
2.29 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Seaview Downs'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 Seaview Downs
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 26 Sep 2026
typical observed square 1 a day
Night movements: observed, lowest 5,000 ft - night is sampled as often as day, but night traffic is light, so this is a floor and no rate can be put on it.
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.
Seaview Downs at a glance
How Seaview Downs is zoned
Selling in Seaview Downs? 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 2.29 km², Seaview Downs is highly constrained by planning overlays. About 11% of the suburb sits within a mapped flood overlay. There is 1 heritage-listed site on record, and the dominant land-use zone is Hills Neighbourhood. The median lot measures about 785 m² across 1,145 parcels.
Who lives in Seaview Downs
Census 2021 figures published by the ABS for the Seaview Downs 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 1027, and decile 8 within South Australia. The national average is 1000.
Age profile
Share of Seaview Downs's 2,718 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Marino - Seaview Downs, the wider ABS statistical area containing Seaview Downs. There is no annual population series published at suburb level, so this describes the surrounding area rather than Seaview Downs itself.
8,997 in 2001 to 10,209 in 2025, up 13%.
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.
Seaview Downs 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 26 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 Seaview Downs 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 52% of Seaview Downs. 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 Seaview Downs lot.
See what's in the $9 report →Seaview Downs planning - frequently asked
Is Seaview Downs flood-prone?
About 11% of Seaview Downs falls within a mapped flood overlay, against the council-wide suburb average of 14%.
Is Seaview Downs bushfire-prone?
Bushfire mapping covers Seaview Downs and little to none of it is mapped as bushfire-prone (the City of Marion average is 9%).
Is Seaview Downs under a flight path?
Aircraft were observed below 3,000 ft over about 52% of Seaview Downs, and over about 61% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 26 Sep 2026). The lowest measured aircraft was at 1,000 ft, with an average of 3,000 ft. At the busiest point in the suburb about 1 aircraft a day were recorded passing over one 500 m square. 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 Seaview Downs?
The dominant planning zone in Seaview Downs is Hills Neighbourhood, though the suburb also includes Conservation and Hills Face.
Does Seaview Downs have heritage-listed places?
Seaview Downs has 1 heritage-listed place on record.
What is the typical lot size in Seaview Downs?
Across 1,145 surveyed parcels in Seaview Downs, the median lot size is about 785 m².
Does Seaview Downs have a train station?
There is no train station inside Seaview Downs itself. The suburb is served by 8 bus stops.
What is the population of Seaview Downs?
At the 2021 Census Seaview Downs had 2,718 usual residents, with a median age of 42 and an average household size of 2.6 people. The wider Marino - Seaview Downs statistical area, which contains Seaview Downs, went from 8,997 people in 2001 to 10,209 in 2025, up 13%.
Is Seaview Downs an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Seaview Downs scores 1027 and sits in decile 8 of 10 nationally and decile 8 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Seaview Downs?
Median household income in Seaview Downs was $1,741 a week at the 2021 Census, against $1,579 for the typical suburb in City of Marion. Median rent was $385 a week and the median mortgage repayment $1,742 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Seacliff Park | 0.8 km | 16% | 0% |
| Seacombe Heights | 1.1 km | 15% | 2% |
| Seacliff City of Holdfast Bay |
1.7 km | 43% | 0% |
| Dover Gardens | 1.9 km | 58% | 0% |
| Kingston Park City of Holdfast Bay |
1.9 km | 54% | 0% |
| Darlington | 1.9 km | 14% | 84% |
| South Brighton City of Holdfast Bay |
2.1 km | 57% | 0% |
| O'Halloran Hill | 2.2 km | 0% | 44% |
| Seacombe Gardens | 2.2 km | 50% | 0% |
| Marino | 2.3 km | 14% | 0% |