Thornbury flood map & planning overlays
A planning-constraint profile of Thornbury
(Darebin, VIC) - 5.14 km², mapped from live council and
state overlay data. This suburb is moderately constrained.
Profile updated 6 September 2026.
Everything below is suburb-wide. Overlays change block to block - see which ones actually touch your lot. The map is free.
Constraint readout
5.14 km² - this suburb is moderately constrained by planning overlays.
Elevation hillshade with street names, clipped to Thornbury's boundary, with the flood, bushfire and environmental overlays drawn on top. It shows where constraints fall; the interactive map shows them on your exact address.
Nearby suburbs, nearest first
Thornbury at a glance
How Thornbury is zoned
Selling in Thornbury? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses - a $9 planning report pulls them at the lot level for any Thornbury address.
Across its 5.14 km², Thornbury is moderately constrained by planning overlays. About 7% of the suburb sits within a mapped flood overlay. There are 69 heritage-listed sites on record, and the dominant land-use zone is General Residential Zone (GRZ2). The median lot measures about 487 m² across 12,428 parcels. These figures are suburb-wide - the overlays that actually apply to a given lot can differ block to block, which is what a property-level check tells you.
Who lives in Thornbury
Census 2021 figures published by the ABS for the Thornbury 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 1083, and decile 10 within Victoria. The national average is 1000.
Age profile
Share of Thornbury's 19,005 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Thornbury, the wider ABS statistical area containing Thornbury. There is no annual population series published at suburb level, so this describes the surrounding area rather than Thornbury itself.
17,056 in 2001 to 20,234 in 2025, up 19%.
Source: Australian Bureau of Statistics. Census of Population and Housing 2021 (General Community Profile) and SEIFA 2021, both published at the Suburbs and Localities level; Regional Population (estimated resident population) at Statistical Area Level 2. Used under CC BY 4.0. Census counts of small populations are randomly adjusted by the ABS to protect confidentiality, so figures for small suburbs are indicative.
Thornbury data sources and coverage
Every figure below is an aggregate for the suburb boundary. “Not mapped” means LayeredGeo does not hold a source layer covering this suburb; it is never an all-clear for a particular property.
| Dataset | Coverage | Publisher |
|---|---|---|
| Flood mapping | Mapped | Vicmap Planning and Victorian Government spatial services |
| Bushfire-prone mapping | Mapped | Vicmap Planning and Victorian Government spatial services |
| Zoning | Mapped | Vicmap Planning and Victorian Government spatial services |
| Heritage and environment | Mapped where published | Vicmap Planning and Victorian Government spatial services |
| Aircraft noise contours (ANEF) | Not held | Vicmap Planning and Victorian Government spatial services, Defence |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 6 September 2026. See the methodology and full source list. Source data changes over time and critical decisions should be checked with the responsible authority.
What a $9 report adds for a Thornbury address
This page is the suburb; the report is your lot. For any Thornbury address it resolves, on the lot boundary:
- The zone and every planning overlay that touches the lot, in the scheme's own labels
- Which flood overlay categories reach the lot
- Whether the lot is in bushfire-prone mapping, and what that triggers for a build
- Whether the lot, or a neighbour, is one of the 69 heritage-listed places on record
- Walking distance to the nearest station
- A coverage disclosure: exactly which layers were, and were not, assessed
The interactive map is free - check an address below.
Geotechnical desktop report for a Thornbury lot
The planning report tells you what you may build. The geotechnical desktop report tells you what the ground under a Thornbury address is likely to do - before you pay for a site investigation.
- Mapped geology and soil landscape on the lot
- Indicative AS 2870 site class, with the evidence behind it
- Nearby bore logs and groundwater records
- Acid sulfate soil and reactive clay screening
- Contours, slope and site elevation
- What the desktop evidence cannot tell you, stated plainly
Check a specific Thornbury 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.
See what's in the $9 report →Thornbury planning - frequently asked
Where can I see a flood map of Thornbury?
The schematic on this page is a Thornbury 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 Thornbury address and it shows the flood, zoning and bushfire mapping on the exact lot boundary.
Is Thornbury flood-prone?
About 7% of Thornbury falls within a mapped flood overlay, against the council-wide suburb average of 11%. Flood overlays vary block to block, so whether a particular lot is affected needs a property-level check.
Is Thornbury bushfire-prone?
Bushfire mapping covers Thornbury and little to none of it is mapped as bushfire-prone (the Darebin average is 1%). Always confirm for the exact lot, as mapping can change.
What is the zoning in Thornbury?
The dominant planning zone in Thornbury is General Residential Zone (GRZ2), though the suburb also includes Housing Choice and Transport Zone (HCTZ1) and Housing Choice and Transport Zone (HCTZ2). Zoning sets what you can build and do on a site, and can differ lot by lot.
Does Thornbury have heritage-listed places?
Thornbury has 69 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.
What is the typical lot size in Thornbury?
Across 12,428 surveyed parcels in Thornbury, the median lot size is about 487 m². There are also 1,309 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.
Does Thornbury have a train station?
Yes - Thornbury has 1 train station: Thornbury Station. It is also served by 63 bus stops and 19 tram stops.
What is the population of Thornbury?
At the 2021 Census Thornbury had 19,005 usual residents, with a median age of 37 and an average household size of 2.3 people. The wider Thornbury statistical area, which contains Thornbury, went from 17,056 people in 2001 to 20,234 in 2025, up 19%. ABS publishes no annual population series for individual suburbs, so that trend describes the surrounding area rather than Thornbury alone.
Is Thornbury an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Thornbury scores 1083 and sits in decile 10 of 10 nationally and decile 10 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.
What is the median household income in Thornbury?
Median household income in Thornbury was $1,971 a week at the 2021 Census, against $1,844 for the typical suburb in Darebin. Median rent was $391 a week and the median mortgage repayment $2,200 a month. These are 2021 Census figures and have not been indexed to today.
Do I need a planning report for a Thornbury property?
A Thornbury 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.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Northcote | 1.6 km | 11% | 0% |
| Preston | 1.9 km | 8% | 0% |
| Brunswick East Merri-Bek |
2.6 km | 54% | 0% |
| Fairfield Yarra |
3.0 km | 19% | 0% |
| Bellfield (Greater Melbourne) Banyule |
3.0 km | 8% | 0% |
| Alphington | 3.1 km | 28% | 0% |
| Fitzroy North Yarra |
3.2 km | 6% | 0% |
| Ivanhoe Banyule |
3.4 km | 20% | 0% |
| Clifton Hill Yarra |
3.5 km | 4% | 0% |
| Heidelberg West Banyule |
3.8 km | 14% | 0% |