Thornleigh bushfire risk
Of Thornleigh’s 4,592 mapped properties, 0% are in a mapped flood area and 23.7% are in a bushfire hazard area.
For context, Thornleigh’s flood exposure is below the NSW average of 5%, and bushfire exposure is above the NSW average of 16.4%.
Check a specific Thornleigh address
Risk varies property by property.
Hazard exposure
Where the hazards are in Thornleigh
Flood and bushfire areas across Thornleigh. Zoom in to see how they fall relative to individual streets.
Crime near Thornleigh
Thornleigh sits in the Hornsby council area, which recorded 5,312 reported offences in the 12 months to Mar 2026.
Every reported offence by type — these add up to the 5,312 total. Figures are for the whole Hornsby council area (which may cover several suburbs), last 12 months. Reported offences only.
Property values in Thornleigh
Median sale price by property type, reported by postcode area — suburbs sharing a postcode show the same figure.
Indicative postcode-area estimate — NSW medians are reported by postcode, so Thornleigh shares this figure with nearby suburbs in the same postcode. Not a valuation of any specific property. Source: NSW DCJ Rent and Sales Report — sales tables (postcode).
Zoning in Thornleigh
Thornleigh is mostly residential. The most common zones:
Low density residential — mostly detached houses on standard suburban blocks.
Zone: Low Density Residential
Industrial / employment — factories, warehouses and trade uses; not intended for homes.
Zone: General Industrial
High density residential — apartments and higher-rise living, usually near centres or transport.
Zone: High Density Residential
School catchments in Thornleigh
Thornleigh can span more than one catchment — check a specific address (below) for the exact school.
Who lives in Thornleigh
At the 2021 Census, 36.5% of Thornleigh’s 8,898 residents were born overseas.
Top ancestries
Top countries of birth
Ancestry counts people reporting each ancestry (up to two each), as a share of responses. Source: ABS 2021 Census.
Development near Thornleigh
Hornsby council approved 421 new dwellings in the 12 months to Jun 2026.
New dwellings approved across the whole Hornsby council area (not just Thornleigh). See the council trend. Source: ABS Building Approvals.
Nearby suburbs
Other suburbs in Hornsby
Compare Thornleigh with the rest of the council area, largest first.
Figures are indicative only — verify any specific property with the relevant council. Sources: council/state planning schemes & flood mapping, Geoscape G-NAF, state police crime statistics, ABS.