Southgate flood map & planning overlays
A planning-constraint profile of Southgate
(Clarence Valley, NSW) - 35.14 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
35.14 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Southgate's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Southgate
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 to
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.
Southgate at a glance
How Southgate is zoned
Buying in Southgate? The zoning, flood and bushfire lines on the section 10.7 certificate attached to the contract are mapped controls - see our s10.7 certificate guide.
Across its 35.14 km², Southgate is highly constrained by planning overlays. About 60% of the suburb sits within a mapped flood overlay, and 95% is flagged bushfire-prone. There are 12 heritage-listed sites on record, and the dominant land-use zone is Primary Production. The median lot measures about 8,559 m² across 334 parcels.
Who lives in Southgate
Census 2021 figures published by the ABS for the Southgate 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 956, and decile 3 within New South Wales. The national average is 1000.
Age profile
Share of Southgate's 198 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Grafton Surrounds, the wider ABS statistical area containing Southgate. There is no annual population series published at suburb level, so this describes the surrounding area rather than Southgate itself.
14,917 in 2001 to 18,099 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.
Southgate 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 | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Bushfire-prone mapping | Mapped | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Zoning | Mapped | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Heritage and environment | Mapped where published | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Aircraft noise contours (ANEF) | Not held | NSW Government spatial services, NSW ePlanning and published council flood studies, 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 Southgate 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.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Southgate lot.
See what's in the $9 report →Southgate planning - frequently asked
Is Southgate flood-prone?
About 60% of Southgate falls within a mapped flood overlay, against the council-wide suburb average of 24%.
Is Southgate bushfire-prone?
Around 95% of Southgate is mapped as bushfire-prone, compared with a Clarence Valley average of 94%.
Is Southgate under a flight path?
No aircraft were observed over Southgate in the period sampled (recent weeks to now). Sampling is intermittent, so that is a floor rather than proof that none fly over. 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 Southgate?
The dominant planning zone in Southgate is Primary Production, though the suburb also includes Rural Landscape and Forestry.
Does Southgate have heritage-listed places?
Southgate has 12 heritage-listed places on record.
What is the typical lot size in Southgate?
Across 334 surveyed parcels in Southgate, the median lot size is about 8,559 m². There are also 4 registered easements mapped in the suburb.
Does Southgate have a train station?
There is no train station inside Southgate itself. The suburb is served by 30 bus stops.
What is the population of Southgate?
At the 2021 Census Southgate had 198 usual residents, with a median age of 51 and an average household size of 2.4 people. The wider Grafton Surrounds statistical area, which contains Southgate, went from 14,917 people in 2001 to 18,099 in 2025, up 21%.
Is Southgate an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Southgate scores 956 and sits in decile 4 of 10 nationally and decile 3 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Southgate?
Median household income in Southgate was $1,321 a week at the 2021 Census, against $1,187 for the typical suburb in Clarence Valley. Median rent was $300 a week and the median mortgage repayment $1,777 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Kyarran | 3.1 km | 7% | 100% |
| Trenayr | 5.1 km | 39% | 92% |
| Warragai Creek | 5.4 km | 0% | 100% |
| Ulmarra | 5.8 km | 100% | 94% |
| Great Marlow | 6.2 km | 99% | 84% |
| Alumy Creek | 6.8 km | 99% | 100% |
| Cowper | 6.9 km | 100% | 93% |
| Calliope | 7.0 km | 100% | 100% |
| Mountain View | 7.4 km | 3% | 99% |
| Swan Creek | 7.6 km | 95% | 97% |