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Verified Reviews for Basement Waterproofing pros in Cotati, CA

*The Angi rating for Basement Waterproofing companies in Cotati, 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 Cotati, 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 December 31, 2025

Find Basement waterproofing pros in Cotati

Avatar for Groundworks

Groundworks

4.67(
12
)
•Approved Pro

Groundworks

4.67(
12
)
•Approved Pro
Customers say: Quality work
20 years of experience
Free onsite estimate

Groundworks, formerly Bay Area Underpinning, specializes in helping homeowners with their residential and commercial foundation repair and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across the Sacramento and San Jose areas. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation. Schedule your FREE inspection today! 1116054

"We hired Groundworks CA (fka Bay Area Underpinning) for what we understood was a full foundation repair. We paid $42K. They only worked on the rear and never informed us that the front wasn’t included. Months later, while selling our home, a third-party engineer found $189K in unaddressed issues at the front. We were blindsided, lost our buyer, and suffered major financial and emotional stress. Groundworks later admitted they hadn’t measured the front. Their rushed “final inspection” months later felt reactive, not professional. When asked for a partial refund, they refused. We feel misled and abandoned. Avoid."

Dominick M on June 2025

Groundworks, formerly Bay Area Underpinning, specializes in helping homeowners with their residential and commercial foundation repair and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across the Sacramento and San Jose areas. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation. Schedule your FREE inspection today! 1116054

"We hired Groundworks CA (fka Bay Area Underpinning) for what we understood was a full foundation repair. We paid $42K. They only worked on the rear and never informed us that the front wasn’t included. Months later, while selling our home, a third-party engineer found $189K in unaddressed issues at the front. We were blindsided, lost our buyer, and suffered major financial and emotional stress. Groundworks later admitted they hadn’t measured the front. Their rushed “final inspection” months later felt reactive, not professional. When asked for a partial refund, they refused. We feel misled and abandoned. Avoid."

Dominick M on June 2025

Avatar for Groundworks

Groundworks

5.00(
4
)
•Approved Pro

Groundworks

5.00(
4
)
•Approved Pro
2 years of experience
Free onsite estimate

Groundworks specializes in helping homeowners with their residential and commercial foundation repair and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across the Sacramento area. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation.

"Juan G was the Forman and Mike was our Piering crew. They were able to put in 7 jacks and complete the job within 1 week! I really appreciated how Juan kept me informed about the job and how they always left their work areas clean and tidy."

Kristina S on December 2025

Groundworks specializes in helping homeowners with their residential and commercial foundation repair and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across the Sacramento area. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation.

"Juan G was the Forman and Mike was our Piering crew. They were able to put in 7 jacks and complete the job within 1 week! I really appreciated how Juan kept me informed about the job and how they always left their work areas clean and tidy."

Kristina S on December 2025

RSF Construction Inc.

New on AngiNew on Angi
•Approved Pro

RSF Construction Inc.

New on AngiNew on Angi
•Approved Pro
6 years of experience
Free onsite estimate

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!

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!

Avatar for Nor-Cal Maintenance

Nor-Cal Maintenance

5.00(
28
)

Nor-Cal Maintenance

5.00(
28
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Nor-Cal Maintenance is family-owned and -operated. We specialize in gutter covers, gutter protection and all rain gutter maintenance from cleaning to beam repair to complete installation for residential and commercial clients in the greater Santa Rosa area, the Greater Sonoma area, and surrounding cities. Nor-Cal Maintenance provides free, personalized consultations to home owners, business owners, wineries, schools, state and federal municipalities, apartments, HOA's, and more. We offer start-to-finish solutions for every project, as well as full design services. We specialize in complete residential exterior maintenance, window washing and power washing services, downspout cleaning, window screen repair, deck refinishing, and MUCH more.

Nor-Cal Maintenance is family-owned and -operated. We specialize in gutter covers, gutter protection and all rain gutter maintenance from cleaning to beam repair to complete installation for residential and commercial clients in the greater Santa Rosa area, the Greater Sonoma area, and surrounding cities. Nor-Cal Maintenance provides free, personalized consultations to home owners, business owners, wineries, schools, state and federal municipalities, apartments, HOA's, and more. We offer start-to-finish solutions for every project, as well as full design services. We specialize in complete residential exterior maintenance, window washing and power washing services, downspout cleaning, window screen repair, deck refinishing, and MUCH more.

Avatar for Garage Experts Of Sacramento

Garage Experts Of Sacramento

5.00(
25
)

Garage Experts Of Sacramento

5.00(
25
)
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

We provide professional installation of commercial and residential epoxy flooring and storage solutions. Our service area stretches from North of Lake Tahoe to areas in and around San Jose and Santa Cruz. We travel for work!! We offer various types of lifetime warrantied epoxy flooring (multi-layer build-ups of "speckled" and metallic fleck) and lifetime warrantied cabinetry, slat wall and overhead racks. coatings and metallic fleck suspended in clear epoxy). Garage Experts has an enormous client base of garage makeover customers. In addition, we provide concrete makeovers (Capping, Stamping, Staining, Resurfacing, Etching, etc). We can provide unique, durable custom counter tops too.

"From start to finish it was a very pleasant experience. The workers who came out to a simple the cabinets and put on the Apoxsee floor were very professional and courteous. I would highly recommend them to anybody who wants epoxy flooring or cabinets."

jay f on February 2021

We provide professional installation of commercial and residential epoxy flooring and storage solutions. Our service area stretches from North of Lake Tahoe to areas in and around San Jose and Santa Cruz. We travel for work!! We offer various types of lifetime warrantied epoxy flooring (multi-layer build-ups of "speckled" and metallic fleck) and lifetime warrantied cabinetry, slat wall and overhead racks. coatings and metallic fleck suspended in clear epoxy). Garage Experts has an enormous client base of garage makeover customers. In addition, we provide concrete makeovers (Capping, Stamping, Staining, Resurfacing, Etching, etc). We can provide unique, durable custom counter tops too.

"From start to finish it was a very pleasant experience. The workers who came out to a simple the cabinets and put on the Apoxsee floor were very professional and courteous. I would highly recommend them to anybody who wants epoxy flooring or cabinets."

jay f on February 2021

Avatar for B A Morrison

B A Morrison

4.77(
79
)

B A Morrison

4.77(
79
)
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers

B.A. Morrison is a family-owned Heating, Ventilation, Air-Conditioning (HVAC) and General Construction company. We have been in business since 1990 and are fully insured and bonded. Our employees are experienced, trustworthy, and honest tradesmen. We are ready to meet your needs in a timely scheduled manner, to your satisfaction, and at a fair price. We offer free estimates for regularly scheduled maintenance of your HVAC equipment, new and replacement HVAC equipment installation, and your general construction needs. Please consider our service, installation, replacement, or home improvement and remodeling services the next time you have a need for your residential or commercial building.

B.A. Morrison is a family-owned Heating, Ventilation, Air-Conditioning (HVAC) and General Construction company. We have been in business since 1990 and are fully insured and bonded. Our employees are experienced, trustworthy, and honest tradesmen. We are ready to meet your needs in a timely scheduled manner, to your satisfaction, and at a fair price. We offer free estimates for regularly scheduled maintenance of your HVAC equipment, new and replacement HVAC equipment installation, and your general construction needs. Please consider our service, installation, replacement, or home improvement and remodeling services the next time you have a need for your residential or commercial building.

Ned Clyde Construction Inc

4.84(
68
)

Ned Clyde Construction Inc

4.84(
68
)
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers

Foundation and leveling specialists serving the entire bay area. Licensed, bonded and insured with 30 years of experience. We have licensed geologists, civil and geotechnical engineers on staff, so there's generally no need for outside consultants. Please call the office at 925-689-5411 to talk to an engineer and schedule an appointment.

"Engineer responded within my time frame. He provided the report I needed quickly."

Stephen S on August 2018

Foundation and leveling specialists serving the entire bay area. Licensed, bonded and insured with 30 years of experience. We have licensed geologists, civil and geotechnical engineers on staff, so there's generally no need for outside consultants. Please call the office at 925-689-5411 to talk to an engineer and schedule an appointment.

"Engineer responded within my time frame. He provided the report I needed quickly."

Stephen S on August 2018

Avatar for Morgan Construction

Morgan Construction

5.00(
50
)

Morgan Construction

5.00(
50
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

At Morgan Construction we strive to create a quality customer experience, helping our homeowners achieve their goals with a budget minded approach. Our focus on quality, craftsmanship and attention to detail is evident in our work. Our extensive, hands-on industry knowledge and creative vision allows us to make recommendations, becoming a true resource for our customers as they are challenged with decisions. Our customer base includes both residential and commercial construction. Morgan Construction sub contracts out all specialty trades to licensed and insured sub contractors that we have a long term trusting working relationships with. Let us help you realize your vision.

"Our house had significant water damage from the heavy rain season so we called a few contractors for assessment and estimates. Dan spent nearly two hours with us, patiently and thoroughly answering all of our questions, providing direct and honest advice, and ultimately helping us decide on our best course of action. He and his experienced team of subcontractors replaced all of our windows and sliding doors, replaced our wood siding with new stucco (including new building paper and plywood sheathing), installed new insulation and drywall, and handled all of the interior painting. Dan was readily available via text or call and was much more than just a project manager. He was extremely hands-on often at the house working side by side with his subcontractors, especially carpentry work for window framing. We are pleased with the end result and highly recommend Morgan Construction to anyone looking for high quality work and a trusted advisor."

Jeff L on April 2024

At Morgan Construction we strive to create a quality customer experience, helping our homeowners achieve their goals with a budget minded approach. Our focus on quality, craftsmanship and attention to detail is evident in our work. Our extensive, hands-on industry knowledge and creative vision allows us to make recommendations, becoming a true resource for our customers as they are challenged with decisions. Our customer base includes both residential and commercial construction. Morgan Construction sub contracts out all specialty trades to licensed and insured sub contractors that we have a long term trusting working relationships with. Let us help you realize your vision.

"Our house had significant water damage from the heavy rain season so we called a few contractors for assessment and estimates. Dan spent nearly two hours with us, patiently and thoroughly answering all of our questions, providing direct and honest advice, and ultimately helping us decide on our best course of action. He and his experienced team of subcontractors replaced all of our windows and sliding doors, replaced our wood siding with new stucco (including new building paper and plywood sheathing), installed new insulation and drywall, and handled all of the interior painting. Dan was readily available via text or call and was much more than just a project manager. He was extremely hands-on often at the house working side by side with his subcontractors, especially carpentry work for window framing. We are pleased with the end result and highly recommend Morgan Construction to anyone looking for high quality work and a trusted advisor."

Jeff L on April 2024

Avatar for Mulhall Construction

Mulhall Construction

4.86(
50
)

Mulhall Construction

4.86(
50
)
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

We do not do small scale projects, We specialize in Foundation Replacements, Soft Story retrofits and Seismic upgrades

We do not do small scale projects, We specialize in Foundation Replacements, Soft Story retrofits and Seismic upgrades

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Basement Waterproofing questions, answered by experts

In many cases, yes, a damp basement can be bad for your health. Not only can damp air affect your lungs, but it can promote mold growth and pest infestation. Mold spores can be dangerous to breathe in, as can waste particles from insects and rodents attracted to the moisture. Damp, moldy air can also move up into your living area. As such, it’s crucial to fix any basement moisture problems as soon as they crop up.

Anything having to do with the structure of your home, such as raising the ceiling, is usually the most expensive part of finishing a basement. Another project component that could be a surprisingly high expense is adding an exterior entrance. 

The cost of a walkout basement can be anywhere from $5,000 to $35,000.

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

Water that pools under pavers can erode the soil foundation and weaken the paver structure. In some situations, it can also cause mold and mildew growth. If that happens, you may need to start budgeting for the cost to build and install a patio to replace the damaged one.

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

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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