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Got a wet basement? Musty odors? Protect your home with our proven solutions & lifetime warranty.

A dry, healthy home starts here.
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Our Services

  • Concealed drainage system
  • Powerful, reliable sump pumps
  • Battery backup systems
  • Patented waterproofing products
  • ENERGY STAR® dehumidifiers
  • Industry-leading warranties

Our Basement Systems Dealers Serving California

31858 Castaic Rd #204
Castaic, CA 91384
So Cal Crawl Space Solutions is the regional authorized dealer servicing Ventura, Santa Barbara, Palmdale, Edwards, Lompoc, and surrounding areas.
67 Galli Drive Ste. C
Novato, CA 94949
Bay Area Moisture Control is a basement waterproofing contractor and authorized Basement Systems dealer servicing Bay Area, San Francisco, Oakland, Berkley, Daly City, Vallejo, and Novato.
4861 Sunrise Dr #105
Martinez, CA 94553
NorCal Foundation Support is the regional choice for crawl space repair, encapsulation, crawl space waterproofing and more. Call today for your FREE Estimate! We proudly serve Sacramento, Concord, Vacaville, Roseville, Yuba City, Placerville, Grass Valley, Truckee, Chico, Artois, Butte City, Elk City and the surrounding areas.

 Your Home faces Water Damage

1. California may not receive a lot of precipitation on average but you would be surprised that California flood insurance loss from 1978 to 2001 was over 350 million dollars. That is the ninth highest in the nation.

2. When flooding hits your area, your basement is most likely to be the prime target for water damage.

3. If you allow it to be wet, moldy, humid, smelly, and unhealthy, you're abandoning an entire floor of space in your home. Additionally, the basement air - filled with odors, dust mite feces, humidity, and mold spores - will rise into the rest of the house, ruining the healthy environment of the home.

Basement Waterproofing & Crawl Space Repair

Whether you live in San Francisco, Sacramento, Oakland, Los Angeles or San Diego, our certified basement and crawl space contractors in your local areas are ready to help you find the right solutions to your basement or crawl space problems. They offer FREE basement or crawl space Estimates and Inspections!

We Provide:
  • Basement Waterproofing
  • Crawl Space Encapsulation
  • Leak Repairs
  • Exclusive, Patented Products
  • World's Best Sump Pumps
  • Energy-Efficient Dehumidifier             
You Receive:
  • Permanently Dry Basement or Crawl Space
  • Controlled Humidity
  • Mold Mitigation
  • Lifetime Transferable Warranty
  • Greater Home Value
  • Peace of Mind

Your home in California may face many types of basement or crawl space water problems, but we've seen them all! In our experiences we've found that the patented WaterGuard basement waterproofing system is the perfect solution for a wet basement, and our sump pumps are the best.

We also have other basement waterproofing products including the SunHouse window well (as seen on "I Want That" on HGTV), the most powerful and energy-efficient basement dehumidifier on the market (the SaniDry Basement Air System), basement walls and floors, and more. We can even take on indoor plumbing leaks or leaky water heaters.

California's Trusted Waterproofing Company

  • ""Thank you very much for your great work and for working with us."" Read Full Testimonial

    E. V. of South San Francisco, CA

    Customer Testimonial

              "Thank you very much for your great work and for working with us."
    E. V.
    South San Francisco, CA
  • "Your product uniquely fit our health needs. Our house feels so much healthier; we're sleeping better and have..." Read Full Testimonial

    K. C. of Corte Madera, CA

    Customer Testimonial

              "Your product uniquely fit our health needs. Our house feels so much healthier; we're sleeping better and have reduced sniffles."
    K. C.
    Corte Madera, CA

The Basement Systems International Network of Authorized Basement Waterproofing Dealers is a respected and highly professional network, and there are several network dealers that serve California.

Click here to contact us or call 800-638-7048 to schedule a free quote for your basement or crawl space waterproofing project. We service all of the state of California, including San Francisco, Los Angeles, San Diego, San Jose, Sacramento and Oakland.

Don’t entrust the health of your home to an amateur. When your basement is wet, call the company that has been revolutionizing basement waterproofing for more than 35 years. Basement Systems has solved wet basement problems for hundreds of thousands of homeowners throughout the United States, Canada, the United Kingdom, and Ireland. As a Basement Systems company, we offer an ensemble of patented products that aren't available to other contractors. We can provide a permanent solution to your basement waterproofing problem and will back it up with a lifetime, transferable warranty.

Click to see why people hire us

Recent job requests for basement waterproofing in CA:

Project Location: , Farmington, CA 95230

Comment: Buying an older home. There is water in the basement and we would like to use the basement as an additional room. Have not closed yet but would like to know if this is a fixable problem.

Project Location: San Napoli Drive, Goleta, CA 93117

Comment: We have a groundwater leak that needs to be repaired.

Project Location: Parkway Court, Orinda, CA 94563

Comment: Water intrusion issues. Please arrange for a visit and propose solutions.

Project Location: El Dorado St., Vallejo, CA 94590

Comment: Not sure if i have a broken sump pump or need to install one. I recently bought my house and with the first rain my basement is flooded.

Project Location: Diehl Ave., San Leandro, CA 94577

Comment: We have a small basement and a garage we went to convert to a living space.

Project Location: 3rd Street, Rodeo, CA 94572


Project Location: Sunnyside Road, Saint Helena, CA 94574

Comment: Need garage back wall sealed and waterproofed.

Project Location: Calvert Ct., Piedmont, CA 94611

Comment: I have water coming into the basement from the concrete foundation during heavy rains

Project Location: Valley VIew Road, El Sobrante, CA 94803

Comment: Water seeping from basement

Project Location: Jordan Ave, Los Altos, CA 94022

Comment: I need a crawl space access cover. 30" by 20" and 10" deep in front.

Project Location: Oak ST, Alameda, CA 94501

Comment: Ground water leak through foundation, possible put in a French drain or some kind of water removal system. Please get back to me asap as my basement is filling up with water Thank you

Project Location: University Ave, Los Altos, CA 94022

Comment: Client with water intrusion in their finished basement. Need an estimate for French drain and water proofing of foundation in the area.

Project Location: Park Ave, Sonoma, CA 95476

Comment: My basement gets flooded when it rains very hard. I do not know where the water is coming from...

Project Location: San Carlos Ave,, San Carlos, CA 94070

Comment: Water leaking into the garage space through cracks in the floor.

Project Location: Alta Mesa Road, Woodside, CA 94062

Comment: Wet basement. Water is seeping through foundation. I'd like to get an estimate for basement system. Thank you.

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All products and services are provided exclusively by local contractors within the Basement Systems Network.

To ensure professional installation and superior service we carefully created an international network of over 350 trusted basement contractors.

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