Trinity Gardens flood map & planning overlays
A planning-constraint profile of Trinity Gardens
(The City of Norwood Payneham and St Peters, SA) - 0.6 km², mapped from live council and
state overlay data. This suburb is moderately constrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
0.6 km² - this suburb is moderately constrained by planning overlays.
Elevation hillshade with street names, clipped to Trinity Gardens'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 Trinity Gardens
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: observed, lowest 4,000 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.
Trinity Gardens at a glance
How Trinity Gardens is zoned
Selling in Trinity Gardens? 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 0.6 km², Trinity Gardens is moderately constrained by planning overlays. About 25% of the suburb sits within a mapped flood overlay. There are 6 heritage-listed sites on record, and the dominant land-use zone is Established Neighbourhood. The median lot measures about 698 m² across 626 parcels.
Who lives in Trinity Gardens
Census 2021 figures published by the ABS for the Trinity Gardens 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 1067, and decile 10 within South Australia. The national average is 1000.
Age profile
Share of Trinity Gardens's 1,264 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Payneham - Felixstow, the wider ABS statistical area containing Trinity Gardens. There is no annual population series published at suburb level, so this describes the surrounding area rather than Trinity Gardens itself.
11,579 in 2001 to 14,111 in 2025, up 22%.
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.
Trinity Gardens 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 Trinity Gardens 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 68% of Trinity Gardens. 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 Trinity Gardens lot.
See what's in the $9 report →Trinity Gardens planning - frequently asked
Is Trinity Gardens flood-prone?
About 25% of Trinity Gardens falls within a mapped flood overlay, against the council-wide suburb average of 26%.
Is Trinity Gardens bushfire-prone?
Bushfire mapping covers Trinity Gardens and little to none of it is mapped as bushfire-prone.
Is Trinity Gardens under a flight path?
Aircraft were observed below 3,000 ft over about 68% of Trinity Gardens, and over about 100% 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 2,500 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 Trinity Gardens?
The dominant planning zone in Trinity Gardens is Established Neighbourhood, though the suburb also includes Community Facilities and Suburban Business.
Does Trinity Gardens have heritage-listed places?
Trinity Gardens has 6 heritage-listed places on record.
What is the typical lot size in Trinity Gardens?
Across 626 surveyed parcels in Trinity Gardens, the median lot size is about 698 m².
Does Trinity Gardens have a train station?
There is no train station inside Trinity Gardens itself. The suburb is served by 5 bus stops.
What is the population of Trinity Gardens?
At the 2021 Census Trinity Gardens had 1,264 usual residents, with a median age of 40 and an average household size of 2.6 people. The wider Payneham - Felixstow statistical area, which contains Trinity Gardens, went from 11,579 people in 2001 to 14,111 in 2025, up 22%.
Is Trinity Gardens an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Trinity Gardens scores 1067 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 Trinity Gardens?
Median household income in Trinity Gardens was $2,006 a week at the 2021 Census, against $1,752 for the typical suburb in The City of Norwood Payneham and St Peters. Median rent was $375 a week and the median mortgage repayment $2,184 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Payneham South | 0.7 km | 19% | 0% |
| Maylands | 0.7 km | 30% | 0% |
| Beulah Park City of Burnside |
0.7 km | <1% | 0% |
| St Morris | 0.8 km | 23% | 0% |
| Evandale | 1.0 km | 20% | 0% |
| Firle | 1.1 km | 17% | 0% |
| Kensington Park City of Burnside |
1.4 km | <1% | 0% |
| Stepney | 1.4 km | 37% | 0% |
| Kensington | 1.4 km | 28% | 0% |
| Payneham | 1.4 km | 34% | 0% |
See all The City of Norwood Payneham and St Peters suburb profiles →