Could Your Block Subdivide Under WA's New Planning Rules?
WA's proposed R-Codes reform could let blocks as small as 700m² subdivide — down from 900m² today, opening the door for an estimated 50,000+ Perth properties. Use our free calculator below to get an instant, indicative read on your block, then talk to a licensed WA builder (BC105853) about what's next.
What's Actually Changing
On 2 July 2026, the WA Government announced the biggest overhaul of the Residential Design Codes in three decades. Here's what it means for owners in Perth's western suburbs.
700m² Could Be the New Threshold
WA's proposed R-Codes reform would abolish the average lot size rule for R20-and-below land, dropping the practical subdivision threshold from 900m² to 700m² for a huge slice of Perth's established housing stock.
Now Covering 18 Perth Suburbs
Western and riverside suburbs (Dalkeith, Nedlands, City Beach, Floreat, Mount Claremont, Claremont, Subiaco, Shenton Park, Daglish, Cottesloe, Mosman Park, Peppermint Grove, Wembley/Jolimont) plus established middle-ring suburbs (Mount Lawley, Bayswater, Maylands, Victoria Park, Bassendean) — each tuned to its own typical zoning and land values.
Indicative, Not Guaranteed
The reform is proposed, not yet law — consultation is expected later in 2026, with gazettal targeted for mid-2027. This tool gives you a starting point, then we confirm the specifics for your address.
Could Your Block Subdivide?
WA's proposed R-Codes reform could let blocks as small as 700m² subdivide. Enter your suburb and approximate block size for an instant, indicative read.
Suburb
City of Nedlands · Typical zoning R10–R12.5
Approximate block size (m²)
400m²
Check your rates notice or a recent title search for your exact lot size.
Anything else about your block?
Corner blocks and rear laneway access often make vehicle-access compliance easier. Heritage or character overlays can block subdivision outright, regardless of size.
These reforms are proposed, not yet law. Public consultation is expected later in 2026, with gazettal targeted for mid-2027. This tool gives an indicative read, not a guarantee.
Your Result
Not likely eligible under this specific reform
Already Renovating or Building?
If your block qualifies, we can walk you through the build itself — from a straightforward, transparent itemized quote through to project management if you'd rather we run the whole thing.
See Our Construction ServicesSubdivided blocks usually need site clearing, demolition, or earthworks before the first slab goes down. We handle that directly, priced transparently from the start.
See Earthworks & Site Preparation