Best Waterproofing Contractors in Sydney
Compare the top waterproofing contractors in Sydney, NSW, ranked by our composite reputation score.
Updated October 2026 · Based on 574 real Google reviews across the 39 waterproofing contractors
Top Waterproofing Contractors in Sydney, NSW
The short answer
As of October 2026, the 3 highest-ranked waterproofing contractors in Sydney, NSW on the Starworks directory are The Waterproofing Shop (4.8 stars from 112 Google reviews), Ultimate Water Seal (5.0 stars from 63 Google reviews) and Rising Damp Sydney (5.0 stars from 39 Google reviews).
Starworks ranks 39 waterproofing contractors in Sydney, NSW, holding 574 Google reviews between them. Across the 39 the median rating is 5.0 stars from a median of 7 reviews. Of the 39, 35 are rated 4.5 or better and 1 has passed 100 reviews.
Every figure here is computed from Google review data that Starworks collects for waterproofing contractors in Sydney, NSW, recalculated when this page rebuilds. Placement on this list cannot be bought.
Michael Joint Sealer pty ltd
Read 59 reviews · Score: 72/100
Sydney Waterproofing & Caulking Group
Read 20 reviews · Score: 64/100
WetStop Waterproofing Solutions PTY LTD Sydney NSW - Torch on waterproofing, Sheet waterproofing, Liquid waterproofing
Read 8 reviews · Score: 61/100
Sydney Waterproofing and Maintenance
Read 3 reviews · Score: 57/100
Titan Waterproofing PTY LTD
Read 1 reviews · Score: 57/100
Premium Seal Solutions
Read 19 reviews · Score: 48/100
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Frequently Asked Questions
Common questions about waterproofing contractors in Sydney.
Who are the best waterproofing contractors in Sydney?
As of October 2026, the 3 highest-ranked waterproofing contractors in Sydney, NSW on the Starworks directory are The Waterproofing Shop (4.8 stars from 112 Google reviews), Ultimate Water Seal (5.0 stars from 63 Google reviews) and Rising Damp Sydney (5.0 stars from 39 Google reviews). Every figure here is computed from Google review data that Starworks collects for waterproofing contractors in Sydney, NSW, recalculated when this page rebuilds. Placement on this list cannot be bought.
How many waterproofing contractors does Starworks rank in Sydney?
Starworks ranks 39 waterproofing contractors in Sydney, NSW, holding 574 Google reviews between them. Across the 39 the median rating is 5.0 stars from a median of 7 reviews. Of the 39, 35 are rated 4.5 or better and 1 has passed 100 reviews.
What star rating should I expect from a good waterproofing contractor in Sydney?
The median Google rating across the 39 waterproofing contractors Starworks ranks in Sydney, NSW is 5.0 stars, and 35 of them sit at 4.5 or above. A rating at or near that median is ordinary for waterproofing contractors in Sydney, NSW rather than a warning sign on its own, and a rating well above it only means much when enough reviews stand behind it.
How many Google reviews does an established waterproofing contractor in Sydney have?
The median waterproofing contractor Starworks ranks in Sydney, NSW carries 7 Google reviews, and 1 of the 39 waterproofing contractors have passed 100.
How does Starworks rank waterproofing contractors in Sydney?
Starworks gives every waterproofing contractor in Sydney, NSW a reputation score out of 100 from three things: its Google star rating (up to 47 points), how many reviews back that rating (up to 35), and whether customers can reach it by website and phone number (up to 18). Review volume is the one part that can subtract: below 15 reviews it costs points, because a near-empty review record gives a stranger very little to go on. No score falls below 0 and placement cannot be bought. The score measures the strength of a business's public review record rather than the quality of its work, so it is worth reading the reviews as well, and every listing links to them on Google.
Why does a waterproofing contractor in Sydney with all 5-star reviews score lower than one with a lower rating?
Because review volume counts as well as rating, and below 15 reviews it counts against you. Five perfect reviews are encouraging but thin evidence; three hundred reviews averaging 4.7 tell a stranger far more about what to expect on the day. That is a judgement about how much proof exists, not about the quality of the work, and a newer waterproofing contractor with a handful of excellent reviews may still be the right choice in Sydney, NSW. The star rating and review count sit next to every score so you can weigh both yourself.
Why does the same waterproofing contractor not appear several times on this list?
Some businesses run more than one Google listing, often one per suburb they service. Those are the same company, so Starworks groups them and shows the business once, using the listing with the strongest review record. That is why this page opens with 39 distinct waterproofing contractors in Sydney, NSW rather than a longer list of repeats.
How often is this list of waterproofing contractors in Sydney updated?
This ranking of waterproofing contractors in Sydney, NSW rebuilds on a 30-day cycle and prints the date of its last rebuild above the list, which for the current version is October 2026. Ratings and review counts are re-read from Google over time rather than on a fixed schedule, so an individual figure here can be older than the rebuild date.
How can I improve my waterproofing contractor business ranking in Sydney?
Collect genuine customer reviews consistently, and keep a working website and phone number on your Google listing, because those are the three inputs the score reads. There is no placement to buy on this page. For scale: the median waterproofing contractor Starworks ranks in Sydney, NSW carries 7 Google reviews at 5.0 stars.
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