Hillside drainage
Storms send runoff into the uphill side of hillside homes and retaining walls.
Yard Drainage, Grading & DownspoutsPacific Coast & Northwest · CA
Basement waterproofing in California
Mostly dry summers and wet winters, with atmospheric-river storms that can bring weeks of rain. Expansive clays are common in parts of the Bay Area and Southern California, and hillside lots are widespread.
Free referral · California
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What kinds of foundations do homes in California have?
Slabs and raised crawl-space foundations are typical; basements are uncommon except in older homes and hillside properties.
What basement and foundation problems are most common in California?
Expansive clay movement
Clay soils crack slabs and stucco with wet-dry cycles.
Foundation Settlement RepairCrawl space moisture after storms
Raised foundations collect water during long storms.
Crawl Space DrainageWhich California cities have local guides?
Which parts of California are covered?
- Los Angeles
- San Diego
- San Jose
- San Francisco
- Fresno
- Sacramento
- Oakland
What do California homeowners ask most?
Do I need a CSLB-licensed contractor?
For jobs above the state's small-job threshold, yes. Check the license number, classification and complaint history on the CSLB website.
Why does water collect under my raised California home in winter?
Long storms saturate the soil and runoff flows under the house. Grading, drains and a crawl space sump are common fixes.
Where can I verify this information about California?
- 1USDA Natural Resources Conservation Service: Web Soil SurveyLook up soil drainage class and shrink-swell potential for any lot in California.
- 2FEMA: Flood Map Service CenterCheck whether a property in California is in a mapped flood zone before finishing a basement.
- 3U.S. Environmental Protection Agency: RadonWhy basements in California should be tested for radon, and how sealed sumps fit with mitigation.
- 4U.S. Environmental Protection Agency: MoldGuidance on moisture control and keeping indoor humidity low to prevent mold.
- 5Federal Trade Commission: Hiring a ContractorWhat to check before hiring: licensing, insurance, written estimates and payment terms.
Wet basement or cracked foundation in California?
By calling, you agree to be connected with an independent waterproofing contractor, who may call or text you back about your request at the number you call from. Calls may be recorded for quality and routing. Consent is not a condition of any purchase; you can opt out at any time, and message and data rates may apply. Privacy policy.