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Best basement waterproofing pros near Lagunitas-Forest Knolls, CA

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Top-Rated Basement waterproofing pros in Lagunitas-Forest Knolls - Updated Nov 2026

Avatar for Groundworks
Groundworks
4.6(
19
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Lagunitas-Forest Knolls, 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
Basement
Basement
Basement
Foundation

+16

163 neighbors recently requested a quote
Recommended by58%of homeowners
Avatar for Same Day Plumbing, Heating, Cooling
Same Day Plumbing, Heating, Cooling
5.0(
1
)
Basement Drainage Channels - Install

Serving Lagunitas-Forest Knolls, CA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

Family-owned Same Day Heating, Cooling, Plumbing operates out of Windsor, just north of Santa Rosa. We offer fast, reliable AC repair and installation services, heater repair & installation, and plumbing services, in the North Bay area of California. Our promise to you is always that if we do not fix your system the SAME DAY we arrive… you DON’T pay the service fee. Our home service experts are licensed and insured with more than 100 years of leadership experience. Additionally, we back all of our installation and replacement services with a 24-month, 100% satisfaction guarantee.

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Additional Photos

+8

49 neighbors recently requested a quote
Rebel Pipelines General Engineering Inc.
New to Angi
Basement Drainage Channels - Install

Serving Lagunitas-Forest Knolls, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

Rebel Pipelines General Engineering Inc. is a premier Class A general engineering contractor based in Petaluma, California, serving municipalities, commercial developers, utility districts, and general contractors throughout Sonoma County and the greater North Bay area. Built on a reputation for precision earthmoving, rigorous safety standards, and deep technical expertise, Rebel Pipelines delivers end-to-end underground utility infrastructure and site preparation. \n \nFrom deep municipal sewer line installations to high-capacity water distribution mains and complex earth retention systems, Rebel Pipelines provides dependable, on-schedule site solutions engineered to meet exacting public works specifications and private development standards.

RSF Construction Inc.
1.0(
1
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Lagunitas-Forest Knolls, 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
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Lagunitas-Forest Knolls, 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
Vargas Landscaping
4.7(
48
)
Basement Drainage Channels - Install

Serving Lagunitas-Forest Knolls, CA and surrounding areas

In business since 1999

Free estimates

Emergency services offered

"Splendidly! The work took 3 weeks from the first day, which is exactly how long he estimated. I cannot praise Nato Vargas and his crew enough. They were here working everyday, without fail from 8am to 5pm. At the end of each day they carefully closed the gates and left the place clean and organized. Nato Vargas was always available - every time I needed to talk to him he answered his phone immediately. On more than one occasion my husband and I changed our minds about various things in the plans and Nato was extremely positive and willing to do exactly what we wanted and offered his suggestions for the design as well. He was more than fair when negotiating prices. I have never had a more pleasant experience with a project of this proportion. I interviewed 5 landscape contractors for this project and chose Nato because he had the most competitive bid and was very punctual and courteous and professional. Nato has earned my respect as an excellent landscape contractor and businessman. I will recommend him to all my friends. I wish I could add a photo - I will try."
Recommended by95%of homeowners
Avatar for Integrity Decks & Restoration General Contracting, Inc.
Integrity Decks & Restoration General Contracting, Inc.
4.9(
16
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Lagunitas-Forest Knolls, CA and surrounding areas

In business since 2016

Free estimates

Warranties offered

"Integrity waterproofed the roof of my floating house to create large deck space and some months later waterproofed the new decks around my house, both times using an epoxy based product called Deck 70. They are easy to work with, very pleasant to have around the house, and do top quality work. I cannot praise them highly enough. Top notch people doing top notch work."
Response time4 hrs
Recommended by33%of homeowners
Showing 1-10 of 42
Basement Waterproofing FAQs, answered by experts

Methods include interior sealants, exterior excavation and waterproofing membranes, sump pump installation, and vapor barriers for encapsulation. Techniques vary based on the structure and severity of moisture issues.

Unfortunately, mold can grow pretty much anywhere, on any kind of surface. However, you’re most likely to see it in damp areas like basements or bathrooms, as well as anywhere there has been a water leak. Consult a local mold specialist to determine if certain areas of your home are prone to mold based on climate and other factors.

Generally, moisture barrier padding costs $0.75 to $1.50 per square foot, varying by brand and mix. That’s a lot more than standard padding, which runs $0.25 to $0.90 per square foot. The price difference between these two options might seem steep, but think of it as insurance against future carpet replacement costs and subfloor damage. If you have pets or kids, that extra investment in high-risk areas like your living room often pays off.

If not properly maintained, an underground downspout may damage your home's foundation. A clogged downspout can back up, causing water to pool around the base of your home and seep into the foundation. Regular inspections and maintenance keep your downspout in good working order, preventing damage and protecting your home.

Yes, it’s worth it to repair a crawl space foundation, even if the issue seems relatively minor. Foundation problems often get worse and more expensive to fix if you leave them untreated. Additionally, your entire home, from the framing and flooring to the roof system, relies on the foundation for even and level support. Issues with your foundation will almost always manifest as problems in and above your living space, so it’s important to find a solution.

The Lagunitas-Forest Knolls, CA homeowners’ guide to basement waterproofing services

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