The state rules, and why owners check. Registration, home indemnity insurance and the rule about your number in advertising apply in Mandurah just as they do in Perth; our Perth builders page explains them with sources. Peel has its own recent reminder of why owners look. In August 2025 Mandurah Magistrates Court fined a man $14,500 after he told a Dudley Park couple he was a registered builder, took a $12,000 deposit on roughly $24,000 of renovation work, and stopped after some demolition, with no written contract or insurance in place. Building and Energy used the case to urge owners to check registration online or in the ServiceWA app, and not to hand over more than 6.5 per cent up front on home building work valued over $7,500.
Local Planning Scheme No. 12. The City's planning rules changed on 11 April 2022, when Scheme 12 was gazetted and revoked Town Planning Scheme No. 3, which had applied since 1999. Scheme 12 writes canal setbacks into its site requirements. On most canal developments, buildings sit at least 4 metres from a boundary on the canal, with a 6-metre average at the rear, measured from the canal side of the wall; anything proposed closer than 6 metres to a canal wall needs a structural engineer's certification. Port Mandurah Stage 1 and Waterside have a flat 6-metre minimum. The scheme also has a flood hazard special control area, drawn from the state's 1-in-100-year floodplain mapping.
Coastal floor levels are arriving site by site. Amendment 7 to Scheme 12, gazetted on 15 May 2026, set a minimum habitable floor level of 2.42 m AHD for one development site at Falcon, or a lower level shown through an approved coastal hazard plan, but never below 2.25 m AHD. The City finished a Coastal Hazard Risk Management and Adaptation Plan for the northern beaches in 2023, endorsed one in 2026 for the southern beaches, from Roberts Point in Halls Head to the southern end of Clifton, after consultation that closed in January, and in September 2026 awarded a tender for a separate plan covering the estuary. A builder who has worked to a set floor level can say so on the site. The level for any particular lot is for the City to confirm.
Across the boundary in Murray. The Shire of Murray's canal policy sets any part of a house, other than a patio, verandah, shade sail or deck, at least 9 metres back from the canal frontage in Yunderup Canals Stage 1, Murray Lakes and Murray Waters, and limits side fences near the water. A 2024 Supreme Court decision, McComish v Shire of Peppermint Grove, made clear that where the state regulations exempt a house from planning approval, a local policy can't require it unless the land is in a special control area, and the Shire's report noted that single houses meeting the Residential Design Codes no longer had to follow its canal policy as a result. In March 2025 the Shire began Amendment 328 to make South Yunderup's canal-front lots a special control area, and it was advertised from September 2025. If you build in the Yunderups, say on your site that you confirm the current position with the Shire before drawings are finalised.
Working with us. We're a web design team in Adelaide and work with Peel builders by phone and email. Our builder client is in South Australia, and we haven't built for a WA builder yet. Mandurah keeps Perth time, which is 1.5 hours behind Adelaide, or 2.5 hours while South Australia is on daylight saving.