Western Australia’s transitional R-Codes arrangements concluded on 10 April 2026. Single houses and grouped dwellings now need to be assessed against the current site-cover provisions, while a limited solar-orientation exemption continues for certain older R50-and-above planning areas.
Why an old concept plan can mislead
A vendor may present a sketch based on transitional deemed-to-comply settings or a local framework that has since changed. Unless the design is checked against the provisions applying today, the advertised dwelling count is only a hypothesis.
Five checks for an infill acquisition
- Confirm the density coding and current local planning framework.
- Calculate site cover using the current definitions and exclusions.
- Identify whether the narrow solar-orientation exemption actually applies.
- Test open space, access, parking, trees and stormwater together.
- Obtain a fresh designer and planner yield sketch before exchange.
Site cover affects the whole feasibility
Reducing the footprint can change unit size, product mix, build cost per saleable square metre and end values. It can also turn a comfortable grouped-dwelling layout into a compromised project with expensive access or servicing.
Local rules still matter
The R-Codes do not replace every scheme, policy, structure plan or local development plan consideration. Verify the complete statutory framework and any approval history attached to the land.
TPC deal lens
Never pay for yesterday’s yield. A current compliant sketch, conservative build rate and settled-sales evidence are worth more than a glossy concept prepared under superseded assumptions.
Sources and image attribution
- WA Planning — Transitional R-Codes arrangements
- Feature photo: Dietmar Rabich, Wikimedia Commons, CC BY-SA 4.0. Cropped for presentation; licence retained.
This article is general property education, not financial, legal, planning or building advice. Verify current rules and obtain qualified advice for the specific site.
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What should investors know about Why an old concept plan can mislead?
A vendor may present a sketch based on transitional deemed-to-comply settings or a local framework that has since changed. Unless the design is checked against the provisions applying today, the advertised dwelling count is only a hypothesis.
What should investors know about Five checks for an infill acquisition Confirm the density coding and current local planning framework. Calculate site cover using the current definitions and exclusions. Identify whether the narrow solar-orientation exemption actually applies. Test open space, access, parking, trees and stormwater together. Obtain a fresh designer and planner yield sketch before exchange. Site cover affects the whole feasibility?
Reducing the footprint can change unit size, product mix, build cost per saleable square metre and end values. It can also turn a comfortable grouped-dwelling layout into a compromised project with expensive access or servicing.
What should investors know about Local rules still matter?
The R-Codes do not replace every scheme, policy, structure plan or local development plan consideration. Verify the complete statutory framework and any approval history attached to the land.
What should investors know about TPC deal lens?
Never pay for yesterday’s yield. A current compliant sketch, conservative build rate and settled-sales evidence are worth more than a glossy concept prepared under superseded assumptions.
Should investors get professional advice about WA’s R-Codes Transition Has Ended: Recheck Site Cover Before Buying An Infill Block?
Yes. This article is general education, so legal, tax, finance, planning or building questions should be checked with appropriately qualified professionals before acting.
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