Undalya flood map & planning overlays
A planning-constraint profile of Undalya
(Clare and Gilbert Valleys Council, SA) - 22.01 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
22.01 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Undalya'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 Undalya
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.
Undalya at a glance
How Undalya is zoned
Selling in Undalya? 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 22.01 km², Undalya is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 100% is flagged bushfire-prone. There is 1 heritage-listed site on record, and the dominant land-use zone is Rural. The median lot measures about 123,045 m² across 91 parcels.
Who lives in Undalya
Census 2021 figures published by the ABS for the Undalya 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 974, and decile 5 within South Australia. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Gilbert Valley, the wider ABS statistical area containing Undalya. There is no annual population series published at suburb level, so this describes the surrounding area rather than Undalya itself.
4,711 in 2001 to 5,198 in 2025, up 10%.
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.
Undalya 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 Undalya 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 17% of Undalya. 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 Undalya lot.
See what's in the $9 report →Undalya planning - frequently asked
Is Undalya flood-prone?
Flood mapping covers Undalya and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 0%).
Is Undalya bushfire-prone?
Around 100% of Undalya is mapped as bushfire-prone, compared with a Clare and Gilbert Valleys Council average of 100%.
Is Undalya under a flight path?
Aircraft were observed below 3,000 ft over about 17% of Undalya, and over about 29% 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 3,500 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 Undalya?
The dominant planning zone in Undalya is Rural.
Does Undalya have heritage-listed places?
Undalya has 1 heritage-listed place on record.
What is the typical lot size in Undalya?
Across 91 surveyed parcels in Undalya, the median lot size is about 123,045 m².
Is Undalya an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Undalya scores 974 and sits in decile 5 of 10 nationally and decile 5 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Auburn | 5.2 km | 0% | 100% |
| Woolshed Flat | 5.3 km | 0% | 100% |
| Rhynie | 6.5 km | 1% | 100% |
| Saddleworth | 9.3 km | <1% | 100% |
| Leasingham | 10.5 km | 0% | 100% |
| Riverton | 12.4 km | <1% | 100% |
| Halbury Wakefield Regional Council |
13.1 km | 0% | 100% |
| Watervale | 13.4 km | 0% | 100% |
| Salter Springs Wakefield Regional Council |
13.5 km | 0% | 100% |
| Manoora | 14.6 km | <1% | 100% |