Best Basement Waterproofing Contractors in Mississauga, ON

21 contractors listed · all 21 in Mississauga · 6 open 24/7 · 14 open weekends · 19 rated 4.5+

Data verified October 18, 2026

Water Pro:

Water Pro:

5.0 51 reviews
“Team was professional and before digging they checked everything and covered wherever the work has to be done to avoid the mess completely.”
10% off repair discountFree estimatesInsured25-yr warranty24/7 emergency service30+ years
1251-A Kamato Rd
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Rooterworx

Rooterworx

5.0 85 reviews
“A good company, excellent specialists who do their job efficiently and accurately”
Coupons & offersLicensed24/7 emergency serviceFree consultation
34 Queen St W unit 4
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Aquamen Waterproofing & Underpinning

Aquamen Waterproofing & Underpinning

4.9 92 reviews
“We were experiencing leaks in multiple areas of our basement, and they waterproofed all the exterior walls and installed a sump pump with a pit.”
Free estimates24/7 emergency serviceServes Greater Toronto AreaFamily-ownedSince 2020
16 1951 Rathburn Rd E
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Waterproofing PD

Waterproofing PD

5.0 115 reviews
“Nick came by and assessed the issues, clearly explained what needs to be done and why”
Free consultationLicensedSince 2019Family-ownedPrices online
3200 Wharton Way
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Pryde Group Corp

Pryde Group Corp

5.0 127 reviews
“I recommend, thank you for a great job and a good price.”
Free estimates24/7 emergency serviceServes Toronto, Mississauga +5Since 2021
4279 Woodington Dr
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Galaxy Plumbing Inc.

Galaxy Plumbing Inc.

5.0 125 reviews
“Super nice guy, who also explained everything along the way so we could understand what was happening and what needed to be done.”
Free estimatesServes Great Toronto area
55 Village Centre Pl
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The 21 contractors listed for Mississauga, ON work on wet basements, foundations and crawl spaces. Warranty claims, free inspection offers and hours come from each company's own website. Ask each one how the proposed repair holds up through frost, because that is where local systems fail.

Area overview: Mississauga, ON

All 21 contractors we list here are in Mississauga itself. We have 24 contractors in Mississauga on file; this page shows the highest-rated 21. 20 of the contractors on this page have a rating, from 3.5 to 5.0 across 1,625 reviews; 10 have 50 or more reviews and 19 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (90%), quality (81%) and responsiveness (81%). The topics that come up most in reviews of the contractors on this page are "price", "estimates" and "cleanliness". 6 are open around the clock; 14 are open on Saturdays and 11 on Sundays. The services the contractors on this page list most often on their websites are basement waterproofing (3), exterior waterproofing (2), foundation crack repair (2), foundation repair (2) and interior waterproofing (2). 6 show a licence on their websites. Domain records put 3 websites of the contractors on this page at ten or more years old; the oldest dates from 2008. 6 offer emergency call-outs; 13 give free estimates; 1 is family- or locally-owned and 3 list coupons or special offers. We count these figures across the contractors on this page; hours and prices change, so confirm the details with the contractor before you book.

How many opinions should I get for a damp problem?

There are 21 listings for Mississauga. Get more than one assessment before committing, because diagnoses here differ more than prices do, and one crew's interior system is another crew's regrading and downspout job. Compare what each one says is causing the water rather than the number at the bottom.

Prime Waterproofing

Prime Waterproofing

5.0 124 reviews
“I had a leak in my basement and Nick identified the issue quickly and completed the job clean and on time.”
Free estimatesServes GTHA
3453 Cedar Creek Dr
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Draincom Basement Waterproofing

Draincom Basement Waterproofing

4.9 89 reviews
“They gave me an estimate (with 3 options) and worked around my schedule to get the work done.”
Coupons & offersFree estimatesLicensed & insured20+ yearsServes Greater Toronto Area
1307 Kamato Rd
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Drymax Waterproofing

Drymax Waterproofing

5.0 81 reviews
“If you are having any pooling of water on your lawn or need a French drain, this is the place to resolve it.”
Free consultationLicensedSince 2021
6068 Netherhart Rd Unit #3
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MMT Waterproofing

MMT Waterproofing

5.0 81 reviews
“Mario and his team did an excellent job installing a sump pump and improving our waterproofing.”
25-yr warranty
1563 Blanefield Rd
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Willfix

Willfix

4.7 34 reviews
“Injustbone day they where able to dig out 6 feet of soil across our back wall, back fill, put up a membrane and clean up.”
5% offFree estimatesServes Greater Toronto AreaOpen 24 hours
526 Silver Creek Blvd
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Quality Age Build

Quality Age Build

4.8 38 reviews
“I'm glad I decided to work with you as my expectations were high and you proved that your team is super professional and hardworking.”
30-yr warrantySince 2011Serves Toronto, Greater Toronto AreaFree consultationPrices online
4369 Full Moon Cir
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Drains Canada

Drains Canada

5.0 24 reviews
“I had 3 plumbing companies come to my house before Luke from Drains Canada and he was the only one that knew where the leak was and fixed it after providing me a fair quote.”
$100 offFree estimatesInsured24/7 emergency serviceResponds within 1 hourServes Mississauga, Markham +6
30 Eglinton Ave W Unit 400
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Corcon Construction Limited

Corcon Construction Limited

4.9 21 reviews
“They also seem very keen to ensure there is a high level of communication at all times between their on site management staff and the customer.”
Serves Mississauga, Greater Toronto AreaSince 2011
East Tower, 2233 Argentia Rd Suite 302
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Kome Waterproofing AND Underpinning Toronto

Kome Waterproofing AND Underpinning Toronto

5.0 22 reviews
“Guys were very professional and completed everything according to the contract, giving my company the opportunity to finish the whole basement, converting it to a separate rental unit.”
Since 2020
1055 Bloor Street East
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Aquapro Waterproofing

Aquapro Waterproofing

5.0 19 reviews
“They swiftly fixed my basement, and I'm thrilled to have found them.”
Serves Greater Toronto Area, Mississauga +11
400 Mississauga Vly Blvd
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Pro Master Interlocking & Restoration

Pro Master Interlocking & Restoration

4.5 2 reviews
“We are extremely pleased with such good service and fair price.”
Free consultationInsuredServes Toronto, Mississauga15+ years
600 Matheson Blvd W
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YY Epoxy Applications INC

YY Epoxy Applications INC

5.0 5 reviews
“Quality results,great attention to details,and very good communication throughbout.”
Free consultationSince 2008
17- 6790 Davand Dr #17
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Waterproof Masters & Associates Inc.

Waterproof Masters & Associates Inc.

3.5 10 reviews
“No leaking issues after few months already - so far so good.”
Lifetime warrantyServes Mississauga, TorontoSince 2009
2624 Royal Windsor Dr Unit 5
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D & D Crack Repair Ltd

D & D Crack Repair Ltd

5.0 3 reviews
“David and his team gave a reasonable quote with a detailed scope of work.”
1947 Mattawa Ave
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Elevator Waterproofing Solutions Inc.

Elevator Waterproofing Solutions Inc.

LicensedSince 2019
2624 Royal Windsor Dr Unit 5
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HomeWaterproofing ContractorsOntarioMississauga, ON

Why these companies made our list

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