Thornleigh planning overlays
A planning-constraint profile of Thornleigh (Hornsby, NSW) - 3.87 km², mapped from live council and state overlay data. This suburb is highly constrained.
Constraint readout
3.87 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Thornleigh'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.
Thornleigh at a glance
How Thornleigh is zoned
Across its 3.87 km², Thornleigh is highly constrained by planning overlays. Very little of the suburb carries a mapped flood overlay, and 41% is flagged bushfire-prone. There are 41 heritage-listed sites on record, and the dominant land-use zone is Low Density Residential. The median lot measures about 752 m² across 2,626 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.
Check a specific Thornleigh 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 →Thornleigh planning - frequently asked
Is Thornleigh flood-prone?
Very little of Thornleigh carries a mapped flood overlay (the Hornsby average is 2%). Flood overlays vary block to block, so whether a particular lot is affected needs a property-level check.
Is Thornleigh bushfire-prone?
Yes - around 41% of Thornleigh is mapped as bushfire-prone, compared with a Hornsby average of 69%. A bushfire-prone designation can trigger additional building requirements, so check the specific address.
What is the zoning in Thornleigh?
The dominant planning zone in Thornleigh is Low Density Residential, though the suburb also includes Public Recreation and General Industrial. Zoning sets what you can build and do on a site, and can differ lot by lot.
Does Thornleigh have heritage-listed places?
Thornleigh has 41 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 Thornleigh?
Across 2,626 surveyed parcels in Thornleigh, the median lot size is about 752 m². There are also 31 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 Thornleigh have a train station?
Yes - Thornleigh has 1 train station: Thornleigh Station. The suburb is served by 169 bus stops.
Do I need a planning report for a Thornleigh property?
A Thornleigh planning report pulls every overlay - zoning, flood, bushfire, heritage and environmental - that touches a single lot, on live council and state data. The interactive map preview is free; a full PDF report is $9.