Waterproofing Sydney — Licensed Contractors, Free Quotes

Waterproofing costs in Sydney typically range from $800 to $5,000+ depending on the scope. A standard bathroom costs $1,500 to $3,000, while large commercial projects can exceed $10,000. Costs vary based on area size, membrane type, access difficulty, and whether it is new construction or remedial work. We connect you with 3 licensed contractors who provide free quotes so you can compare prices.

Yes. In New South Wales, waterproofing work valued over $5,000 requires a contractor licence issued by NSW Fair Trading. All waterproofing contractors we connect you with hold valid NSW Fair Trading licences and carry appropriate insurance. You can verify any contractor licence at the NSW Fair Trading website.

A typical bathroom waterproofing job in Sydney takes 2 to 4 days, including surface preparation, membrane application, and the mandatory 24-hour curing period before tiling. Larger projects like balconies or basements may take 5 to 10 days. Weather can affect external waterproofing timelines, especially during Sydney's wet season.

AS 3740-2021 is the Australian Standard for waterproofing of domestic wet areas. It applies to all bathrooms, showers, laundries, and other wet areas in residential buildings across Sydney and NSW. Compliance is mandatory under the National Construction Code. All contractors we connect you with are required to comply with AS 3740.

Common signs include water stains on ceilings below wet areas, musty odours, peeling paint, bubbling tiles, damp or discoloured walls, efflorescence (white salt deposits) on masonry, and visible mould growth. If you notice any of these in your Sydney property, we recommend getting a waterproofing inspection before damage worsens.