Top 10 Waterproofers in Sydney, New South Wales
There are currently 10 highly-rated waterproofing businesses in Sydney, New South Wales listed on TradeRefer, with an average Google rating of 5.0★ across 64 verified reviews. The 10 listed below are ranked from highest to lowest rating, all ABN-verified and community-recommended.
Ranked #2026
By Google Rating
5.0★ Avg Rating
64 Google reviews
100% Verified
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10 Businesses
In Sydney
Top 10 Waterproofing in Sydney — Ranked by Customer Rating
Compare the highest-rated waterproofing in Sydney, New South Wales. All businesses listed are ABN-verified and surfaced without paid placement.
DS Projects Pty Ltd
Concrete leak repair is about sealing cracks, joints and voids from the inside. We use pressure injection to push polyurethane resin directly into the leak path. Once injected, the resin reacts with moisture, expands, and seals the crack completely. Water has nowhere to travel after that.
Waterstop NSW
Waterstop NSW is a top-rated waterproofing business serving Bondi Junction, NSW. With a 5-star rating from 10 reviews, they are one of the most trusted waterproofing providers in the area. Specialising in waterproofing for bathrooms, balconies, and foundations, Waterstop NSW delivers quality workmanship and reliable service. Contact them today for a free quote.
North Shore Pro - Services
North Shore Pro - Services provides expert waterproofing for bathrooms, balconies, and foundations in Crows Nest, NSW. Rated 5 stars by 6 customers, they are known for quality work and professional service. Get in touch with North Shore Pro - Services for a free, no-obligation quote.
North Side Waterproofing
North Side Waterproofing based in Dee Why servicing all of the Northern Beaches. Bathrooms, Balconies Retaining walls, Planter Boxes, all remedial works, we also do tilling
Tech-Dry Building Products
Tech-Dry Building Products offers waterproofing for bathrooms, balconies, and foundations in South Penrith, NSW. With 4 customer reviews and a focus on quality workmanship, they serve homes and businesses across the South Penrith area. Contact Tech-Dry Building Products for a free quote.
Soleace Pty Ltd
Soleace - Waterproofing and building remediation specialists. Sucessful projects across Australia - operating for over 27 years
Horizon Waterproofing
Horizon Waterproofing offers waterproofing for bathrooms, balconies, and foundations in Glenmore Park, NSW. With 3 customer reviews and a focus on quality workmanship, they serve homes and businesses across the Glenmore Park area. Contact Horizon Waterproofing for a free quote.
Aqua1waterproofing
Aqua1waterproofing offers waterproofing for bathrooms, balconies, and foundations in Mount Annan, NSW. With 3 customer reviews and a focus on quality workmanship, they serve homes and businesses across the Mount Annan area. Contact Aqua1waterproofing for a free quote.
Forest Waterproofing
Sydney North shore waterproofer.Leak detection specialist. Apartment building defects rectifications.
AllSydneyWaterproofing
AllSydneyWaterproofing offers waterproofing for bathrooms, balconies, and foundations in Menai, NSW. With 2 customer reviews and a focus on quality workmanship, they serve homes and businesses across the Menai area. Contact AllSydneyWaterproofing for a free quote.
How Much Do Waterproofing Cost in Sydney?
Pricing data based on Australian industry averages for New South Wales. Always get 2–3 written quotes.
Typical Range
$30–$80
/m²
After-Hours Rate
$120
Emergency callout
Avg Hourly Rate
$55
Sydney market average
Prices are estimates only. Always request a written quote before authorising any work.
Waterproofing Licensing Requirements in New South Wales
In NSW, waterproofing must comply with AS 3740. For home building work, waterproofing is a specialist area requiring appropriate contractor licensing.
How to Choose the Best Waterproofing in Sydney
Use this checklist before hiring any waterproofing in Sydney, New South Wales.
- 1
Verify their electrical licence is current at your state's electrical safety authority (e.g. Energy Safe Victoria, NSW Fair Trading).
- 2
Confirm they carry public liability insurance of at least $5 million — ask to see the certificate.
- 3
Get 2–3 written quotes for any job over $500. A written quote protects both parties and clarifies the full scope.
- 4
Check their Google and TradeRefer ratings — look for consistent reviews mentioning punctuality, clean workmanship, and clear communication.
- 5
Ask whether they'll provide a Certificate of Compliance (electrical safety certificate) on completion, as required by law in most states.
Frequently Asked Questions — Waterproofing in Sydney
How much does bathroom waterproofing cost in Australia?
Waterproofing a standard shower costs $300–$600. A full bathroom including shower, floor, and bath area costs $500–$1,200. Balcony waterproofing costs $80–$150/m². These are labour costs only — materials add $50–$200 depending on the membrane system used.
Do I legally need to waterproof my shower?
Yes — AS 3740 (Waterproofing of domestic wet areas) is mandatory under the National Construction Code. All showers, bath surrounds, laundries, and balconies must be waterproofed to this standard. Failure to comply can void home insurance claims related to water damage.
How long does waterproofing last in a shower?
A quality waterproofing membrane correctly installed should last 10–15 years minimum. Cheap products or incorrect installation fail much sooner. The grout and tile system on top doesn't waterproof the shower — the membrane underneath does. Grout cracks don't mean the waterproofing has failed.
How do I know if my shower is leaking?
Signs include damp patches on adjacent walls or floors, mould behind tiles, peeling paint, efflorescence (white mineral deposits), soft or spongy tiles, or a musty smell. A licensed waterproofer can perform a flood test to confirm leakage before expensive rectification work begins.
Can you waterproof over existing tiles?
Generally not recommended for showers. If the existing tiles are sound and firmly bonded, a liquid membrane can be applied over them in some scenarios. However, if there are any cracked, hollow, or loose tiles, these must be removed and the substrate repaired before new waterproofing is applied.
Top Waterproofing in Nearby Cities
Find the highest-rated waterproofing in other cities across New South Wales.
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