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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
Castaic, CA 91384
So Cal Crawl Space Solutions is the regional authorized dealer servicing Ventura, Santa Barbara, Palmdale, Edwards, Lompoc
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.

 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: Declined, Shingle Springs, CA 95682

Comment: Water seepage

Project Location: Co. Rd. V V, Glenn, CA 95943

Search Request: basement flood control contractor

Comment: High water table here combined with local farming leaves my basement full spring and summer. Drys up in fall/ winter months. Need help to correct problem. Pumps are overwhelmed by volume of water. Thinking about filling it in with cement.

Project Location: Auburn Dr, Davis, CA 95616

Comment: Interested in an estimate for ThermalDry subfloor installation into a 140 sqft converted garage space with concrete floor.

Project Location: Prosperity Way, San Leandro, CA 94578

Comment: Rain coming soon my basement is leaking

Project Location: Coolidge Ave, Oakland, CA 94602

Comment: My subfloor got flooded with the heavy rains last winter, I want to get this fixed. Look forward to an estimate

Project Location: Excelsior Ave., Oakland, CA 94602

Comment: We have a concrete block basement. We are experiencing a lot of leakage with the rains. We are interested in installing the interior water drainage system but we would like to know the cost.

Project Location: Appian Way, El Sobrante, CA 94803

Comment: Need a drainage system in basement apartment

Project Location: Elmwood Ave, Berkeley, CA 94705

Comment: We have water seeping into our basement. we are about to hire a contractor to rebuild our foundation and would like to consider improving the water flow around our house outside and into the basement. please contact for a discussion. Bruce

Project Location: San Ramon Ave., Berkeley, CA 94707

Comment: Basement flooding. I have a finished basement and when it rains really hard and long it floods.

Project Location: Stuart Street, Berkeley, CA 94703

Comment: Hi I have a leak in my basement.I want to fix it - permanently. It is a finished basement with a concrete floor. I would very much like to get an estimate and timeline. Thanks. Gerry

Project Location: Ramona, Albany, CA 94706

Comment: Water coming into finished, below ground living space

Project Location: Via Del Pinar, Monterey, CA 93940

Search Request: Basement System’s WaterGuard

Comment: There is some standing water under the house and hydrostatic pressure has built up where it leaked into one of the bedrooms. Water tends to pool outside and all runs down towards the house and then gets pooled underneath the house. I was wondering if a sump pump or your new design interior french drain would be appropriate.

Project Location: Robin Whipple Way, Belmont, CA 94002

Comment: Need sump pump replacement. existing shorted out. outside access, not in crawl space. looking for general estimate on parts/labor to replace.

Project Location: Timberlane Way, San Mateo, CA 94402

Comment: We have water coming in the basement closet where the water heater is.The closet floor is dirt so the water is seeping up from the ground.I would like to see if we could seal it somehow to prevent the water from coming up so we can get rid of very loud pump.

Project Location: Tiffany Ave, San Francisco, CA 94110

Comment: I live on top of a creek, so high groundwater and seepage into the garage.