*The Angi rating for Basement Waterproofing companies in Claremont, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.
*The HomeAdvisor rating for Basement Waterproofing companies in Claremont, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.
Last update on May 23, 2026
Serving Claremont, CA and surrounding areas
Approved
In business since 1992
Free estimates
Offers commercial services
At 21st Century Painting and Waterproofing, we offer the best service for your waterproofing needs. We have been in business for over 20 years and have the skill and expertise you need. We look forward to working with you. Give us a call today!
Serving Claremont, CA and surrounding areas
Approved (Corporate)
In business since 1992
Free estimates
Emergency services offered
"Erinn was my initial contact and he gave a very through and fair estimate. We had structural work done to support floor joists and large beams under the garage that needed replacing. Ernesto and his team, Julio, Salvatore and Gilder worked tirelessly to complete the work and were respectful, punctual, informative and good humoured throughout the entire process. I would not hesitate to use them again or recommend them to others. A really great company!!"
+323
Serving Claremont, CA and surrounding areas
Approved
In business since 1981
Free estimates
Emergency services offered
"These guys were unbelievable! It sounds simple to run a water line from the street to the house but it wasn’t. Imagine almost 200 feet and hand dig uphill most of the way and across the yard. Now imagine having to go under a driveway, sidewalk and two concrete flower rails. Now add in they did it through one of the hottest heat waves Southern California had this year! I’m telling you these guys did it with sweat and a smile. Just unbelievable!"
+542
Serving Claremont, CA and surrounding areas
Approved (Corporate)
In business since 1995
Free estimates
Warranties offered
"Roger and his crew of Manuel, Carlos and Josias did everything we asked for and more. Roger answered all of our questions, kept us informed on the status of the project and managed the project extremely well. We definitely made the right decision having Groundworks do our project."
+16
Serving Claremont, CA and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"Nick was amazing and got a big problem done for a reasonable price. He will be my forever plumber now"
+103
Serving Claremont, 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!
Serving Claremont, 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.
Serving Claremont, CA and surrounding areas
In business since 2016
Free estimates
Credit card accepted
"We worked with Ali (sales manager) and Tony (project manager), who took the time to design a project that made sense for our property and our budget, made a number of suggestions and recommendations and were never pushy or tried to "sell" us on something. The crew really went above and beyond to provide top quality workmanship and overall we were in very good hands. Highly recommended!"
Serving Claremont, CA and surrounding areas
In business since 1988
Free estimates
Emergency services offered
"I got the worth of every dollar I spent on Reliable Roofing. I couldn’t ask for better."
+290
Serving Claremont, CA and surrounding areas
In business since 1985
Free estimates
Credit card accepted
"It went very well! They were really professional and I had them also repair some weak spots. They were also very accommodating to the tenants."
+19
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