Boundary and area
From Landgate's public cadastre map, matched to your street address.
Finding the lot
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Indicative only. Not planning advice. Confirm with a licensed surveyor and your council. Lot areas come from a simplified public map, not your title.
Granny flat
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Check with council
How a split happens
- Surveyor feasibilitySite check, services, layout and a subdivision plan.
- Apply to the WAPCYour surveyor lodges the application. Council and agencies are consulted.
- Meet the conditionsTypically services, crossovers, demolition and fees, each cleared by the agency.
- Plan endorsedLandgate certifies the plan, then the WAPC endorses it. Approval lasts 3 years for 5 lots or fewer.
- New titlesApply to Landgate within 2 years of endorsement.
Source: WAPC, Guide to subdivision applications.
How it works
Three public sources. One honest answer.
R-Code and zone
From the Department of Planning's local planning scheme maps, plus heritage and bushfire overlays.
Today and 2027
R-Codes Volume 1 (2026) Table D, and the proposal announced on 2 July 2026.
Read the R-Codes| Code | Min / avg per lot | For 2 lots today | Proposed |
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Site area per dwelling, R-Codes Vol. 1 (Version 3, 10 April 2026), Table D. Proposed column: minimum only, R20 and below. Indicative.