Crawlspace flooding in Stinson Beach and West Marin, CA
Water under the house is easy to miss and slow to leave. It raises humidity indoors, soaks floor framing and insulation, and can lead to mold. Here's what that looks like in Stinson Beach and West Marin, what to do, and how to get connected with an independent, licensed local provider.
Crawlspace flooding in Stinson Beach and West Marin: what we see
Low-lying areas of Stinson Beach and Bolinas can see water from coastal storms, high tides and creeks, and many beach homes are raised or have crawlspaces close to sand and groundwater. Inland, rural homes on slopes catch runoff. Second homes may not be checked until well after a storm.
The local picture
Slopes and runoff. Where water comes from depends on where the house sits. Stinson Beach and West Marin spans coastal flats and dunes at Stinson Beach, steep slopes along Highway 1, and rolling ranchland and wooded ridges inland.
Creeks, tides and groundwater. Proximity to water affects groundwater and flood risk under the house. Stinson Beach and West Marin is shaped by the Pacific coast, Bolinas Lagoon, Tomales Bay, Lagunitas Creek and Easkoot Creek, with coastal storms and high tides affecting low areas.
Conditions vary a lot from street to street in Stinson Beach and West Marin, so a provider should assess your specific home.
What to do right now
- Don't enter a flooded crawlspace if wiring may be wet or if the water could be sewage or floodwater.
- Photograph the water level from the access hatch.
- Check your sump pump and its power, if you have one.
- Fix obvious sources you can reach safely, like a disconnected downspout.
- Call for professional pumping and drying.
Want a local pro to take a look?It's free for homeowners and there's no obligation.
Stinson Beach and West Marin checklist
- Arrange for someone to check under the house after major storms if you're not there.
- Clean gutters and extend downspouts well away from the foundation.
- Make sure soil slopes away from the house.
- Check that the vapor barrier covers the soil and isn't torn.
- Look under the house after the first big storm of the season.
How a provider handles it
Providers pump out the water, remove wet insulation and damaged vapor barrier, clean framing (and treat it after contaminated water), and dry with dehumidifiers while monitoring moisture in the wood. Lasting fixes usually involve drainage work. For the full picture, read our complete guide and the deep dive on crawlspace flooding in Marin. We also have a storm-season article on gutters and drainage for hillside homes.
Before you hire anyone, check the license on the CSLB website. Here's how we vet providers.
Nearby towns and more for Stinson Beach and West Marin
- Water Damage in Stinson Beach and West Marin: our full local page
- Crawlspace flooding service
- Burst pipe water damage in Stinson Beach and West Marin
- Storm and flood damage in Stinson Beach and West Marin
- Same problem nearby: crawlspace flooding in Mill Valley, crawlspace flooding in Fairfax, crawlspace flooding in Novato
Frequently asked questions
Can king tides affect my Stinson home?
Combined high tides and storms can raise water levels in low coastal areas. Watch NWS and AlertMarin notices.
Is water in the crawlspace covered by insurance?
It depends on the cause. A sudden plumbing failure is treated differently from groundwater or outside flooding. Check your policy.
Will this cause mold?
Damp crawlspaces are a common source of mold. Dry it out and fix the source. See our sister site's crawlspace mold guide.