Water damage repair and restoration in Castro Valley, CA
Most water damage calls in Castro Valley, CA come down to plumbing failures, roof leaks and storm water. 40% of Castro Valley's 22,909 homes were built before 1960, so galvanized pipe, cast-iron drains, plaster walls and older foundations are common. Restoration companies in our network serve 2 Castro Valley ZIP codes in Alameda County.
Quick answer
For water, fire or smoke damage in Castro Valley, CA, shut off the water or power if it's safe, then call (833) 462-1975. We connect you with an independent restoration company that serves your ZIP; 2 Castro Valley ZIP codes are covered. With many older homes here, hidden pipe and drain leaks are common, so ask for a moisture check behind walls.
Census data
Castro Valley homes by the numbers
- Homes
- 22,909
- Median year built
- 1966
- Built before 1960
- 40%
- Owner-occupied
- 71%
Among the 213 California cities with pages on this site, Castro Valley ranks #135 by number of homes and has older housing than 76% of them (median build year 1966). Its share of pre-1960 homes (40%) is well above the 24% average for those cities, which points to more pipe, drain and foundation leaks.
Source: U.S. Census Bureau, American Community Survey 2019–2023 5-year estimates (tables B25034, B25035, B25003).
Local risks
What causes water damage in Castro Valley
Aging pipes and drains
With 40% of homes built before 1960, many Castro Valley houses still have galvanized supply lines that corrode from the inside and cast-iron or clay drains that crack. Leaks often start slowly inside walls or under floors.
Atmospheric rivers
Winter storms bring heavy rain, roof leaks and flooding.
Slab leaks
Leaks in pipes under the slab go unnoticed.
Seasonal risks, licensing and FEMA history across the state are on the California page.
Common calls
Most requested in Castro Valley
Disaster history in Alameda County
Since 2000, FEMA has included Alameda County in 7 major disaster declarations: 4 severe storms, 3 floods. The most recent was Severe Winter Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides in 2023 (DR-4699).
Source: OpenFEMA disaster declarations, retrieved October 5, 2026.
FAQ
Castro Valley water damage questions
Who do I call for water damage in Castro Valley?
For water, fire or smoke damage in Castro Valley, CA, shut off the water or power if it's safe, then call (833) 462-1975. We connect you with an independent restoration company that serves your ZIP; 2 Castro Valley ZIP codes are covered. With many older homes here, hidden pipe and drain leaks are common, so ask for a moisture check behind walls.
How old are homes in Castro Valley?
The median home in Castro Valley was built in 1966. About 40% of its 22,909 homes were built before 1960 and 7% in 2000 or later, according to the Census Bureau's American Community Survey. Older homes are more likely to have corroded pipes and drains; newer homes see more appliance and supply-line leaks.
Has Alameda County had federally declared disasters?
Yes. Since 2000, FEMA has included Alameda County in 7 major disaster declarations for storms, floods, fires and similar events, most recently Severe Winter Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides (2023). Federal assistance is only available for declared events; most water damage is handled through homeowners or flood insurance.
Do you cover all of Castro Valley?
Restoration companies in our network cover 2 Castro Valley ZIP codes. Coverage is set ZIP by ZIP, so enter yours in the ZIP checker or call to confirm a company serves your address.
ZIP codes covered in Castro Valley
94546, 94552
Water damage help near Castro Valley
- Water damage restoration in San Leandro, CA5 mi
- Water damage restoration in Hayward, CA6 mi
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- Water damage restoration in Dublin, CA9 mi
- Water damage restoration in Danville, CA9 mi
- Water damage restoration in Oakland, CA10 mi
- Water damage restoration in Pleasanton, CA10 mi
- Water damage restoration in Alameda, CA11 mi
Also covered in Alameda County: Oakland · Fremont · Hayward · Berkeley · San Leandro · Livermore · Alameda · Pleasanton · Dublin · Union City · Newark · San Lorenzo · Albany · Emeryville · Sunol
Guides for Castro Valley homeowners
Water damage in Castro Valley?
Stop the source if you can, then call. We'll connect you with a local restoration company that serves your ZIP.
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