The WA rules in brief. Mandurah works under the same state rules as Perth. Building work that needs a permit and is worth $20,000 or more has to be done by a registered building contractor, retaining walls generally need a building permit once they hold back more than 0.5 m, and councils inspect pool barriers at least every four years. Sprinklers follow Water Corporation's two-day roster for Perth and Mandurah, with the switch-off from 1 June to 31 August and exemptions for new lawns and for trade work after wetting agents or fertiliser. Our page for Perth landscapers sets these out, along with Water Corporation's Waterwise endorsements, so this page sticks to the Peel.
The estuary. The Peel Inlet and Harvey Estuary take the run-off from a large farming catchment, and the Department of Water and Environmental Regulation says much of that farmland sits on soils that hold nutrients poorly. By the 1980s, nutrient loads were causing persistent algal blooms and fish kills; the Dawesville Channel restored good water quality to the main body of the estuary, though the department says active catchment management is still needed. Most of the nitrogen and phosphorus comes from farming, beef farming above all, so household gardens aren't the main source. Householders have still been asked to play their part: in 2016 the Home River Ocean campaign, backed by the Peel-Harvey Catchment Council, urged residents to fertilise lawns in autumn and spring, measure the dose and hold off when rain is around. A maintenance business that explains how it fertilises is answering something locals have been asked to think about.
Canals and the Shire of Murray. Mandurah's residential canals run through Mandurah itself, Halls Head and Dudley Park off the estuary, Wannanup off the Dawesville Channel, and South Yunderup near the mouth of the Murray River, in the Shire of Murray. Murray's building guidance says retaining walls over 500 mm need a building permit, must be designed by a professional engineer and can't have any part, footings included, over the property boundary, and that any retaining wall on Canal-zoned land must first receive planning approval. The Shire is an endorsed Waterwise Council. Its verge guidelines, last updated in December 2024, cap hardscape at a third of the verge, keep a 2 m clear zone beside the kerb and describe a Waterwise Verge Rebate for soft landscaping that matches half of what the owner spends, up to a cap; owners need the Shire's approval before work starts and before-and-after photos to claim. Private jetties are licensed separately by the Department of Transport, which our Mandurah tradies page covers.
Fire season on bigger blocks. The City of Mandurah's Fire Break and Fuel Hazard Reduction Notice for 2026/27, issued under the Bush Fires Act 1954, splits properties at 4,000 m². Below that size, land has to be kept clear of flammable material other than living trees, shrubs, garden plants and lawn, with grass mown or slashed to 40 mm. At 4,000 m² and above, owners need a trafficable mineral-earth firebreak at least 4 m wide, with 4.2 m of vertical clearance, inside every boundary and around outbuildings, plus at least 2 m between trees or shrubs and any habitable building and no tree overhanging one. The work is due by 17 November 2026 and has to be kept up until 31 May 2027. The Shire of Murray and the City of Rockingham publish their own notices and dates, so a firebreak page should link to each council rather than copy them.
Working with us. We're a web design team in Adelaide, and Peel businesses work with us by phone and email. Our working day overlaps most of yours: Adelaide clocks run 90 minutes ahead of Mandurah's, and two and a half hours ahead while South Australia has daylight saving. We haven't built for a WA client yet, so the sites below are from New South Wales.