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Verified Reviews for Basement Waterproofing pros in Sonoma, CA

*The Angi rating for Basement Waterproofing companies in Sonoma, 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 Sonoma, 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 January 02, 2026

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Avatar for Groundworks

Groundworks

4.67(
12
)
•Approved Pro

Groundworks

4.67(
12
)
•Approved Pro
Customers say: Quality work
21 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
3 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
7 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.

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

Avatar for Benjamin Construction, Inc.

Benjamin Construction, Inc.

5.00(
5
)

Benjamin Construction, Inc.

5.00(
5
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Benjamin Construction provides​ a wide range of residential and commercial construction services for clients throughout the Lafayette Area handling everything from kitchen and bathroom remodeling to addition and custom home building. In addition to its new construction and remodeling services, the company designs and build high-end custom cabinetry, install tile and stone, replace windows, build decks and fences, and more. Owner-operator Benjamin Dumitrascuta is a second-generation building professional—his father, Gelu, established his own construction company in the 1980s after emigrating from Eastern Europe and taught his son the trade at a very young age. “He instilled in me the importance of quality craftsmanship, and that remains my number one objective today,” says Mr. Dumitrascuta. Benjamin Construction takes a personalized approach to dealing with customers and develops close relationships with them that continue even after their construction projects are finished. “Personal service is an important part of my process,” confirms Mr. Dumitrascuta. “I personally handle all cabinet, finish, tile, framing/carpentry, foundation, electrical and plumbing work in-house, and I’m heavily involved in the design of each project.”

Benjamin Construction provides​ a wide range of residential and commercial construction services for clients throughout the Lafayette Area handling everything from kitchen and bathroom remodeling to addition and custom home building. In addition to its new construction and remodeling services, the company designs and build high-end custom cabinetry, install tile and stone, replace windows, build decks and fences, and more. Owner-operator Benjamin Dumitrascuta is a second-generation building professional—his father, Gelu, established his own construction company in the 1980s after emigrating from Eastern Europe and taught his son the trade at a very young age. “He instilled in me the importance of quality craftsmanship, and that remains my number one objective today,” says Mr. Dumitrascuta. Benjamin Construction takes a personalized approach to dealing with customers and develops close relationships with them that continue even after their construction projects are finished. “Personal service is an important part of my process,” confirms Mr. Dumitrascuta. “I personally handle all cabinet, finish, tile, framing/carpentry, foundation, electrical and plumbing work in-house, and I’m heavily involved in the design of each project.”

Avatar for RestoreX, LLC

RestoreX, LLC

5.00(
9
)

RestoreX, LLC

5.00(
9
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

RestoreX, LLC is a locally owned and operated Disaster Restoration Company specializing in water damage and flood removal, sewage cleanup, fire/smoke/odor cleaning services, mold inspections and mitigation for both residential and commercial properties. If you have any one of the following issues or any others please reach out for immediate assistance: Water damage Fire damage Water leak Flood Flooding Basement or crawlspace flood Roof leak Mold Extraction Wall and carpet drying Water leak Fire, smoke and odor cleanup Crawlspace moisture barriers Commercial water damage Direct insurance billing Work with all insurance companies Free inspections 24/7 Call or text: 844-MADEWHOLE (844-623-3936) Price beat guarantee! Immediate response 24/7!! http://restorex.biz

"Vendor was very responsive and professional."

john l on August 2022

RestoreX, LLC is a locally owned and operated Disaster Restoration Company specializing in water damage and flood removal, sewage cleanup, fire/smoke/odor cleaning services, mold inspections and mitigation for both residential and commercial properties. If you have any one of the following issues or any others please reach out for immediate assistance: Water damage Fire damage Water leak Flood Flooding Basement or crawlspace flood Roof leak Mold Extraction Wall and carpet drying Water leak Fire, smoke and odor cleanup Crawlspace moisture barriers Commercial water damage Direct insurance billing Work with all insurance companies Free inspections 24/7 Call or text: 844-MADEWHOLE (844-623-3936) Price beat guarantee! Immediate response 24/7!! http://restorex.biz

"Vendor was very responsive and professional."

john l on August 2022

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Basement Waterproofing questions, answered by experts

In most cases, standard homeowners insurance policies cover water damage from sudden, accidental damage, like burst pipes and leaking appliances. However, water damage caused by flooding, groundwater seepage, or heavy rain is likely to be excluded from coverage. Check your policy to be sure, as some plans include opt-in flood insurance coverage. Certain companies also allow homeowners to add an optional water backup endorsement to a policy.

A sump pump can remove excess moisture from under a house if standing water is present. Other ways to protect your crawl space from moisture include installing a vapor barrier, using a dehumidifier, installing insulation, and using a fan to dry the space. Finally, keeping your gutters clear of debris and positioning your downspouts away from the home’s foundation can prevent moisture from getting into the crawl space in the first place.

Basements are commonly converted into game rooms. The potential challenges you may run into include controlling moisture, working with low ceilings, limited natural light, and the need for additional electrical or HVAC work. Addressing these issues can add to the total cost, but it ensures a comfortable and functional space.

A crawl space can be as little as 42 inches below the grade of your house, but this is not always recommended in flood-prone areas. At a minimum, there must be at least 16 inches of clearance between the ground and the floor joists to access the space in an emergency.

A crawl space is an area under the house that provides access to plumbing, electrical, heating ducts, and other HVAC units. Its purpose is to create a buffer between the ground and the living area, helping with ventilation, moisture control, and access for maintenance or repairs. Crawl spaces are most often seen in houses in North America which are built on concrete foundations versus other parts of the world where buildings are constructed differently.

The Sonoma, CA homeowners’ guide to basement waterproofing services

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