Waterproofing Membrane Cost Calculator
Estimate the cost of a waterproofing membrane. The scale of the job and how easy the site is to access are the main cost drivers, along with any making-good afterwards.
Your waterproofing membrane details
Above the typical range — usually premium options or a more complex job.
Waterproofing is cheap compared to fixing the damage when it fails, never cut corners on a wet area or balcony. It must be done by a licensed waterproofer with a certificate, which protects you and keeps warranties valid.
💰 Ways to save
- Get at least two or three quotes, trade rates and mark-ups vary widely.
- Clear and prepare the area yourself where you safely can, you are paying tradie rates for any time spent shifting your gear.
- Bundle related jobs into one visit so you pay the call-out and setup once.
How we estimate this
A waterproofing membrane in Australia typically costs around $50 to $90 per square metre in 2026, so a bathroom is roughly $600 to $1,200 and a balcony $1,200 to $2,500, with basement tanking $3,000 and up. Prep and screeding are extra.
Pricing reviewed: November 2026.
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Pricing reviewed November 2026. Indicative Australian costs, not a quote.
Understanding waterproofing membrane costs in Australia
A waterproofing membrane in Australia typically costs around $50 to $90 per square metre in 2026, so a bathroom is roughly $600 to $1,200 and a balcony $1,200 to $2,500, with basement tanking $3,000 and up. Prep and screeding are extra.
A waterproofing membrane seals wet areas, balconies and basements against water. It is priced by the area, with basement tanking the most demanding. It is licensed work with a certificate, and failure causes expensive damage, so quality matters.
Frequently asked questions
How much does waterproofing cost in Australia?
Roughly $50 to $90 per square metre in 2026, so about $600 to $1,200 for a bathroom and $1,200 to $2,500 for a balcony, with basement tanking from $3,000. Prep and screeding are extra.
Does waterproofing need to be certified?
Yes, wet-area and balcony waterproofing is licensed work in Australia and the waterproofer issues a certificate. It is required for compliance and protects you if a leak is ever investigated.
Are you a tradesperson / contractor?
Everyone on this page is working out what waterproofing membrane costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.