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Best basement waterproofing pros near San Mateo, CA

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Top-Rated Basement waterproofing pros in San Mateo - Updated Nov 2026

Avatar for Geico Builders
Geico Builders
5.0(
62
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving San Mateo, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Free estimates

Warranties offered

"We were in need to Remodel our Bathroom due to leak from the pipe in between two Bathrooms and change out the plumbing of our house from galvanized steel to copper, upgrade drain to ABS pipes. Geico Builders crew had an immediate availability to solve our issues. Mila was assigned to our project as a project manger. The communication of the project manager was outstanding as well as guidance on what has to be purchased for completing our beautiful Bathroom. Once the water leak was discovered and the subfloor damage was assessed. A repair plan was quickly in place for the leak. Plus a plan to restructure and build a stronger subfloor. Overall, Mila and Supervisor Ruiz and their team were very excellent at staying on schedule and completing the project with quality workmanship. Overall we are very happy with our beautiful new bathroom. Our renovation project was completed on time and the new look absolutely met our expectations. Our main expectations/requirements were a regular shower pan, the shower walls and the flooring, all done with quality porcelain tile. Adding a shampoo niche and 2 safety grab bars in the shower area. Plus the bench which I am so happy with. All of these items were installed with attention to detail and with quality workmanship. Thank you Geico Builders for your professionalism and hard work we are truly Happy with everything you had done to our house and looking forward to work with you for our new project which is going to be Kitchen Remodeling by next year."
Composite Deck Replacement Trex
Full Backyard Remodel with Outdoor Kitchen
Remodeling - Kitchen & Bathroom Project
Deck Replacement Composit
Composite Deck

+270

Response time1 day
Response rate100%
11 neighbors recently requested a quote
Avatar for In & Out Plumbing & Construction Inc
In & Out Plumbing & Construction Inc
4.2(
79
)
Basement Drainage Channels - Install

Serving San Mateo, CA and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Arrived on time, told me there were three possibilities for the source of the leak, gave me quotes for the different options, and said that he would start with the inexpensive option and if that didn't work we'd progress. The first thing he tried worked, and the price was fair. He reminded me, as he left, that the work was warrantied for 30 days and to call him if there was any subsequent recurrence. Very competent, friendly, professional."
San Francisco Sewer Line
Floor Drain
San Francisco Sewer Line
Floor Drain
San Francisco Sewer Line

+27

Response time1 day
Response rate99%
12 neighbors recently requested a quote
Avatar for Mike Counsil Plumbing and Rooter
Mike Counsil Plumbing and Rooter
4.0(
331
)
Basement Drainage Channels - Install

Serving San Mateo, CA and surrounding areas

Approved (Corporate)

In business since 1994

Emergency services offered

Warranties offered

"All went great they rehung the sewer pipes under the house. Replaced the damage sewer pipe. Installed a new fresh water pipe from the water meter to the house installed a pressure regulator and a back flow on the hot water heater. Pached all the holes and even one the didn’t cause"
Preparing a safe environment for working on a sewer line replacement.
Water heater installation with expansion tank
Additional Photos
Additional Photos
Additional Photos

+28

Response time8 hrs
Response rate100%
Recommended by81%of homeowners
RSF Construction Inc.
1.0(
1
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving San Mateo, 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(
112
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving San Mateo, 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.

Recommended by100%of homeowners
Palm Construction, Inc.
5.0(
90
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving San Mateo, 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 Platinum General Engineering and Construction
Platinum General Engineering and Construction
5.0(
11
)
Basement Drainage Channels - Install

Serving San Mateo, CA and surrounding areas

In business since 2015

Free estimates

Credit card accepted

"I hired Platinum to replace our home’s water and sewer line. This work included concrete and asphalt replacement in the street. They did an amazing job with all of there work, and the street looks great. They were helpful and friendly. I recommend their service to anyone looking for a professional finished product!!!"
Water Main Extension with Asphalt Restoration
Trenchless Sewer Line Replacement - Alameda
Trenchless Sewer Line Replacement - Orinda
Sewer Drain Line Replacement Project
Concrete - Pouring & Repair Project

+26

Recommended by100%of homeowners
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Basement Waterproofing FAQs, answered by experts

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.

It depends on what caused your basement flooding, the extent of the problem, and the risk of the flood continuing. If your flood is coming from a septic system or sewer line, breathing in the sewer gasses can be dangerous, so you should vacate. If the flood occurs from an ongoing natural disaster, relocating to a safe area might be wise. If you just have a plumbing leak or rainwater coming in, you can likely stay in the house if you don’t have electrical lines down there, but make sure you call in professionals to fix the issue immediately.

Make sure you're calling in the right expert to help repair and/or clean your crawl space. A serious issue may require multiple experts that include a local mold remediation pro, an HVAC pro, a foundation pro, and a plumber. You should also consider using a nearby junk removal service to avoid handling debris that could be covered in mold, fungi, rot, or asbestos.

There are a few downsides to a wet room, the most important of which is the risk of mold growth from the moisture and humidity. Standard bathrooms can have the same issue, but wet rooms are more likely to experience problems because water is less carefully contained. You also have less privacy since the entire bathroom is open, and the room must include waterproofing, which makes wet rooms more expensive to install than regular bathrooms.

Underfloor insulation alone will not cause moisture and mold, but improper installation can. Although the purpose is to seal any drafts, your subfloor still needs ventilation. If you seal the area too tightly and prevent all airflow, this can cause moisture to get trapped. This moisture eventually leads to mold and—if your floors are wood—rotting.

The San Mateo, CA homeowners’ guide to basement waterproofing services

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