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Best basement waterproofing pros near Fontana, CA

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Top-Rated Basement waterproofing pros in Fontana - Updated Nov 2026

Avatar for Groundworks
Groundworks
3.5(
176
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Fontana, CA and surrounding areas

Approved (Corporate)

In business since 1995

Free estimates

Warranties offered

"These guys were awesome!! If you need foundation work, call them first. I have a raised foundation and it was off by 3 in. in some area's. I went with this company because they do not use contractors or sub-contractors. Everything is done by the company! I had one window break and they called me immediately about it, cleaned it up and got the plywood to cover the opening. When they gave me the quote I didn't quite have the money. I called them apprx 10 mos later to give the go ahead with the work. By that time the prices had gone up ALOT by 10K. But they honered the 1st quote because it was under a year old. And a good warranty!!"
Foundation
Foundation
Foundation
Concrete
Concrete

+16

Response time11 hrs
87 neighbors recently requested a quote
Recommended by38%of homeowners
RSF Construction Inc.
1.0(
1
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Fontana, CA and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

RSF Construction Inc. is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

Palm Construction, Inc.
5.0(
112
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Fontana, CA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

It can be a daunting task looking for not only the right contractor for your job but also the right contractor for you. We completely understand what you're going through. We know every customer has different desires, different needs and different schedules. We're not only here to turn your ideas into reality but to make it a memorable experience every step of the way. Call us right now, no matter where you are in the planning process.

Recommended by100%of homeowners
Avatar for Monarch Concrete Coatings
Monarch Concrete Coatings
4.8(
17
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Fontana, CA and surrounding areas

In business since 1985

Free estimates

Credit card accepted

"We had a second story deck that was leaking water into the garage. We got 4 companies to come and give us a quote.  Two of them were cheaper but they seemed as puzzled as we were about what to do and could not guarantee from future problems. The other company suggested rebuilding the entire deck and was way out of budget. Ryan from Monarch Custom Coatings came with a sample that had several layers to waterproof the deck - we were very impressed that he was very knowledgeable and has a lot of experience with this type of work. He and his crew worked very hard, always professional, prompt, courteous, and our deck looks amazing now. We were so happy with them that we hired them again to redo the garage floors. We have had bad experiences in the past with contractors, so we know that finding a good, reliable, and honest one is very hard and rare. We highly recommend Monarch Custom Coatings!"
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+19

Recommended by93%of homeowners
Palm Construction, Inc.
4.6(
131
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Fontana, CA and surrounding areas

In business since 2016

"I went with Palm Construction on my roof replacement and I am completely satisfied with their work. Jonathan and his team were extremely professional, accurate, well organized and clean. They are really great team! They worked every day till the dark and my roof was finished ahead of schedule. The quality is excellent, my roof is beautiful and I can't recommend enough this company!"
Response time3 hrs
Response rate97%
Recommended by91%of homeowners
Avatar for OM Construction Inc
OM Construction Inc
4.7(
151
)
Basement Drainage Channels - Install

Serving Fontana, CA and surrounding areas

In business since 1990

Free estimates

Emergency services offered

"We had a mainline sewage issue with extensive water damage due to tree root damage that caused us to have to replace flooring, baseboards, subfloor and repair walls removed in the water and asbestos remediation process in bathroom, hallway, laundry, family room and kitchen.

Tony was very helpful in providing a thorough estimate of the costs, including pointing out damage that needed to be repaired,  that had not been itemized by the insurance company's estimator.  He worked within the allotted payments provided by the insurance company and began his work quickly even though he had to wait for a couple of weeks for payment due to insurance company delays.

We had used his services for another bathroom project and found him on Angie's List at that time.  I was very happy with that smaller job and was confident in using his services for this, much larger project."
Roofing Project
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+86

Recommended by95%of homeowners
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Basement Waterproofing FAQs, answered by experts

The primary reason homes have crawl spaces is so the foundation can reach down below the frost line to avoid dangerous soil movement and structural damage when the ground freezes. They’re more popular in colder climates where the ground freezes down to a few feet, and slabs are most popular in warmer areas where there is no frost line. Crawl spaces also provide a space for utility lines to run where they’re at less of a risk of freezing.

Encapsulation can take the place of crawl space vents since it protects the area from moisture and air all year round. Determining whether you should open or close crawl space vents can be complicated since it often depends on the weather and humidity. Skip this step by investing in crawl space encapsulation whenever possible.

Yes, engineers assess soil load-bearing capacity and provide construction guidelines.

Yes, you can technically make a crawl space liveable, but the only way to do so is by converting it into a basement. While some crawl spaces are big enough to walk through and store large items, they lack appropriate insulation and space to be liveable.

Due to the nature of basements, some level of waterproofing is necessary to prevent water from seeping in and causing damage. Some definitive signs that your basement needs waterproofing measures or needs existing waterproofing measures need to be updated include:

  • Water in your basement, including damp walls or puddles on the floor

  • Mold spots in your basement

  • Musty smells or odors

  • Warped doors or walls

  • Cracks in walls

  • Insect issues, such as cockroaches and termites

The Fontana, CA homeowners’ guide to basement waterproofing services

From average costs to expert advice, get all the answers you need to get your job done.