San Mateo County
San Mateo, CA water damage cleanup and restoration
Water damage in San Mateo, CA usually starts in one of a few places: a failed supply line or water heater, a roof or window leak, or water that gets into a basement or crawl space. 44% of San Mateo's 42,431 homes were built before 1960, so galvanized pipe, cast-iron drains, plaster walls and older foundations are common. Restoration companies in our network serve 5 San Mateo ZIP codes in San Mateo County.
Check a San Mateo ZIP
Fast callback on emergency requests · 5 ZIP codes covered
Quick answer
For water, fire or smoke damage in San Mateo, 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; 5 San Mateo ZIP codes are covered. With many older homes here, hidden pipe and drain leaks are common, so ask for a moisture check behind walls.
Local risks
What causes water damage in San Mateo
Original plumbing in older homes
44% of San Mateo's housing predates 1960. Pipes that old narrow with rust, joints weaken and drain lines crack, so a small drip behind plaster or under a floor can go unnoticed until stains or soft spots appear.
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.
Census data
San Mateo homes by the numbers
- Homes
- 42,431
- Median year built
- 1964
- Built before 1960
- 44%
- Owner-occupied
- 51%
Among the 213 California cities with pages on this site, San Mateo ranks #55 by number of homes and has older housing than 82% of them (median build year 1964). Its share of pre-1960 homes (44%) 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); 103,006 residents per the 2024 population estimate.
Disaster history in San Mateo County
Since 2000, FEMA has included San Mateo County in 7 major disaster declarations: 3 severe storms, 3 floods, 1 fire. 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
San Mateo water damage questions
Who do I call for water damage in San Mateo?
For water, fire or smoke damage in San Mateo, 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; 5 San Mateo 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 San Mateo?
The median home in San Mateo was built in 1964. About 44% of its 42,431 homes were built before 1960 and 11% 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 San Mateo County had federally declared disasters?
Yes. Since 2000, FEMA has included San Mateo 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 San Mateo?
Restoration companies in our network cover 5 San Mateo ZIP codes. Coverage is set ZIP by ZIP, so enter yours in the ZIP checker or call to confirm a company serves your address.
Common calls
Most requested in San Mateo
ZIP codes covered in San Mateo
94401, 94402, 94403, 94404, 94497
Water damage help near San Mateo
- Water damage restoration in Burlingame, CA4 mi
- Water damage restoration in South San Francisco, CA7 mi
- Water damage restoration in San Bruno, CA8 mi
- Water damage restoration in Pacifica, CA10 mi
- Water damage restoration in Hayward, CA12 mi
- Water damage restoration in San Leandro, CA13 mi
- Water damage restoration in Alameda, CA13 mi
- Water damage restoration in Oakland, CA15 mi
Also covered in San Mateo County: Daly City · Redwood City · South San Francisco · San Bruno · Pacifica · Menlo Park · Burlingame · San Carlos · Belmont · Millbrae · Half Moon Bay · Atherton · El Granada · Brisbane · Portola Valley · Emerald Lake Hills · Montara · Moss Beach
Guides for San Mateo homeowners
Water damage in San Mateo?
Stop the source if you can, then call. We'll connect you with a local restoration company that serves your ZIP.
Fast callback on emergency requests