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Avatar for Groundworks
Groundworks
4.6(
19
)

Serving Cotati, CA and surrounding areas

Approved (Corporate)

In business since 2023

Free estimates

Warranties offered

"Everything looks good after the work was done. I can finally close my bathroom door. I appreciated the fact that the foreman Erick Baez, went over what was done as they were done. I also appreciated that the two installers Manny Erickson and Jesus Villagomez also communicated with me after they were done to reassure that they did a proper job installing the jacks. Very good to know how the process was going. Great job."
Basement
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+16

175 neighbors recently requested a quote
Recommended by58%of homeowners
RSF Construction Inc.
1.0(
1
)

Serving Cotati, 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(
90
)

Serving Cotati, 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!"
Recommended by100%of homeowners
Avatar for CLEAN CRAWLSPACE INC
CLEAN CRAWLSPACE INC
4.7(
14
)

Serving Cotati, CA and surrounding areas

In business since 2003

Free estimates

Credit card accepted

"The company called us the day after the earthquake, offering to come and do a free check in the crawlspace to be sure there is no damage or places needing repair in the liner after the quake. I phoned them yesterday to make the appointment and they came out today. And there is no damage or repairs needed, and the liner held up, still attached to the foundation cement stones and pillars. I felt this was very thoughtful of them to remember us. Since we installed the product a year ago, they have helped us feel comfortable that the product is doing what it is supposed to do. They also came out during the rains (however brief) in late February and checked that everything was still dry (not that we had flooding or ground water tables rise, but we were concerned that rain might have been coming in from the side vents in the house siding to the crawlspace). It was dry and everything looked good, so we determined that no more work was necessary to close up the house's side vents. That was money and time saved. ...Professional company and good people.
"
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+16

Recommended by100%of homeowners
Avatar for Extreme Makeovers Inc
Extreme Makeovers Inc
5.0(
2
)

Serving Cotati, CA and surrounding areas

In business since 1999

Free estimates

Credit card accepted

"Extreme makeovers was great to work with.  He was always prompt with either phone calls or arriving at my house to do the work.  Staff was courteous and cleaned up when finished.  Extreme kept to the budget and there were no surprises."
Recommended by100%of homeowners
Avatar for Hampton Enterprise LLC
Hampton Enterprise LLC
3.7(
9
)

Serving Cotati, CA and surrounding areas

In business since 1989

Free estimates

Emergency services offered

"I only use James when I need some work done to my house. He responds fast, gets the work done quicker than just about anyone else I've ever used and seems very concerned with leaving his customers happy."
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Recommended by60%of homeowners
Avatar for Rojas Construction & Remodeling, Inc.
Rojas Construction & Remodeling, Inc.
New to Angi

Serving Cotati, CA and surrounding areas

Free estimates

Emergency services offered

Small jobs welcome

Rojas Construction and Remodeling, Inc. is a trusted, family-owned general contractor based in Walnut Creek, serving the entire Bay Area. Since 2007, we’ve specialized in home remodeling, kitchen and bathroom renovations, room additions, and ADUs, providing full-service solutions including framing, plumbing, electrical, flooring, and dry rot repairs. Our team is dedicated to exceptional craftsmanship, attention to detail, and delivering projects on time and within budget. We transform homes with quality, reliability, and care, making every space both beautiful and functional.

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Basement Waterproofing questions, answered by experts

Costs depend on the area's size and condition, damage extent, and chosen method. A professional evaluation provides a tailored estimate based on specific needs.

If you notice standing water under the deck after rainstorms, you may need a drainage system to efficiently move this water. You do not want standing water to rest against your foundation or against support posts for the deck, as this could cause significant structural problems over time. Make sure the area has proper grading, too.

Yes, slab leaks are fairly common, especially in older homes and places that are prone to earthquakes which can move home foundations.

In most cases, a crawl space will not dry out on its own unless the moisture comes from an uncommon flood and isn’t expected to be a recurring issue. For most homeowners, moisture problems in the crawl space will only continue to get worse over time, so addressing the underlying problem with gutter systems or a foundation drainage system and setting up a preventative solution like a dehumidifier is necessary.

Preventing future basement flooding often involves installing sump pumps, improving drainage, sealing foundation cracks, and maintaining gutters. Costs vary, but preventive measures can range from a few hundred to several thousand dollars, depending on the solutions chosen. Investing in prevention can save you money on future flooded basement cleanup costs and repairs.

The Cotati, CA homeowners’ guide to basement waterproofing services

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

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