Thomastown flood map & planning overlays

The schematic on this page is a Thomastown flood map: the mapped flood overlays drawn over the suburb's terrain and street grid, covering about 7% of the suburb. Flood lines vary block to block, so for a specific property use the free interactive map - search any Thomastown address and it shows the flood, zoning and bushfire mapping on the exact lot boundary.

About 7% of Thomastown falls within a mapped flood overlay, against the council-wide suburb average of 4%. Flood overlays vary block to block, so whether a particular lot is affected needs a property-level check.

Around 11% of Thomastown is mapped as bushfire-prone, compared with a Whittlesea average of 71%. A bushfire-prone designation can trigger additional building requirements, so check the specific address.

About 1% of Thomastown sits inside a published aircraft noise contour. ANEF contours are forecasts published per airport and used to control noise-sensitive development; they are not a measurement at any one house, and a property can sit under a flight path and outside every contour.

The dominant planning zone in Thomastown is Industrial 1 Zone (IN1Z), though the suburb also includes General Residential Zone (GRZ5) and Transport Zone (TRZ2). Zoning sets what you can build and do on a site, and can differ lot by lot.

Thomastown has 20 heritage-listed places on record. Heritage listing affects what you can alter or demolish, so confirm whether a specific property is listed or near a heritage place.

Across 12,513 surveyed parcels in Thomastown, the median lot size is about 539 m². There are also 5,249 registered easements mapped in the suburb - an easement can restrict where you can build, so always check the title and overlays for the specific lot.

Yes - Thomastown has 1 train station: Thomastown Station. It is also served by 112 bus stops.

At the 2021 Census Thomastown had 20,234 usual residents, with a median age of 39 and an average household size of 2.6 people. The wider Thomastown statistical area, which contains Thomastown, went from 22,546 people in 2001 to 20,595 in 2025, down 9%. ABS publishes no annual population series for individual suburbs, so that trend describes the surrounding area rather than Thomastown alone.

On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Thomastown scores 900 and sits in decile 2 of 10 nationally and decile 1 within Victoria - decile 1 being the most disadvantaged tenth of Australian suburbs and decile 10 the least. The national average score is 1000. SEIFA summarises income, education, occupation and housing across the whole suburb, so it describes the area, not any particular household in it.

Median household income in Thomastown was $1,225 a week at the 2021 Census, against $1,735 for the typical suburb in Whittlesea. Median rent was $350 a week and the median mortgage repayment $1,690 a month. These are 2021 Census figures and have not been indexed to today.

A Thomastown planning report pulls every overlay - zoning, flood, bushfire, heritage, environmental and noise - that touches a single lot, on live council and state data. The interactive map preview is free; the full PDF report is $9.