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CA metro service · 4 counties · calls answered 24/7
Roof leak repair starts with the problem found and photographed, then the scope and price in writing before any work starts.
For roof leak repair in San Jose and 5 towns across Santa Clara, San Mateo and Santa Cruz counties, Roofers Hotline takes one call at (855) 512-1072. The line is answered around the clock, and you get a written estimate before work starts.
With 61% of homes inside the city limits built before 1980 by Census estimates, a repair estimate often comes with a replacement estimate.
Water often enters a roof several feet from the stain on your ceiling. Roof leak repair here starts in the attic and on the roof surface to find the actual entry point. Homes built before 1980 make up 61% of the stock here, so older roofing details are common. Call to book the inspection.
Flashing around chimneys and walls, plumbing boots and valleys are the joints where leaks usually start. The median home here was built in 1975, so these parts have often been through many seasons. You get a written estimate that says which ones need resealing and which need replacing. Ask for it when you call.
Once water gets past a shingle, it soaks the underlayment beneath it, and sealing the surface alone leaves that layer wet. The estimate lists the damaged shingles and the underlayment to be replaced. The metro averages 16.1 inches of precipitation a year in the 1991 to 2020 climate normals, so a repair has to hold through every rainy season. Call before the next rain.
Slow leaks can soften the plywood or boards under the roofing long before a ceiling stain shows. The last federal disaster declaration covering this area was for severe winter storms, flooding and mudslides on April 3, 2023, and soaked roofs from a season like that can hide rot. Call to have the decking checked.
For the work itself, read how roof leak repair works, which follows a job from the first call onward.
San Jose's housing is older than many people assume: 61% of homes were built before 1980 (ACS 2019-2023), and the median home dates to 1975. Many of those roofs are on a second or later covering, and the flashing, vent boots and valleys around them have been through decades of sun and rain. Roof leak repair here starts by tracing where water gets in, from the attic and from the roof surface, then resealing or replacing the part that failed. Call 24 hours a day if water is coming through a ceiling.
San Jose gets 16.1 inches of precipitation a year and about 2 days with a freeze (1991-2020 normals), so leaks here rarely come from ice dams or hail. NOAA's county record since 2015 shows no hail of 1 inch or larger, and the largest hail on record is 0.75 inch. Leaks tend to start where old flashing, boots and valleys wear out, and they show up when a heavy winter storm finally finds the weak spot.
For this service locally, see roof inspection across this metro, booked across the metro's 144 ZIP codes with a written estimate first.
Sources: U.S. Census ACS 2019 to 2023; NCEI 1991 to 2020 normals. Updated October 2026.
Winter storms and straight-line winds are the local pattern, so two signs matter most. A drip or stain that appears during or after rain usually points to flashing, a boot or a valley that wind and rain have worked loose. A musty attic or damp insulation shows water getting in where you can't see it from inside the house. Peeling paint below the roofline is the third thing to check, since slow leaks often reach the eaves first.
Costs
| Job | Range | Per unit |
|---|---|---|
| Roof leak repair | $400–$1,800 | per job |
| Flashing repair (chimney, wall, vent) | $200–$700 | per job |
| Roof repair, minor (a few shingles, a boot, sealant) | $100–$1,700 | per job |
| Roof repair, moderate (a section, valley or underlayment) | $1,100–$3,300 | per job |
Full roof cost breakdown for this metro.
Typical range for this metro, built from published ranges and the local labor index (1.15); a written estimate depends on pitch, layers and decking.
Not a quote: typical 2026 ranges from published cost guides and Census County Business Patterns 2022 payroll data; your written estimate depends on pitch, layers and decking.
Source: published 2026 cost guides (Fixr, Bob Vila, Today's Homeowner) and Census County Business Patterns 2022 roofing-contractor payroll.
Roofers Hotline also handles emergency roof repair across this metro here, with photographs taken before any estimate is written.
Why call
Hail reports within 15 km of San Jose peak in March, and the county's most recent federal declaration, on April 3, 2023, was for severe winter storms, straight-line winds, flooding, landslides and mudslides. FEMA lists 15 declarations from 1977 to date. Rain-driven damage is what to plan around here. Check the attic and ceilings after the first big storm of the wet season, and call as soon as you see a stain or drip, because a small leak is easier to repair before the decking gets wet.
20 miles away, this service is booked through the same number; see our coverage of Atherton for that town's figures.
California licensing: California requires roofing contractors to hold a CSLB license, usually the C-39 Roofing classification. Look up any license at CSLB.
Questions
Age is a factor. In the metro, 61% of homes were built before 1980 and the median build year is 1975 (ACS 2019-2023). Many of those roofs are on a second covering or later, and flashing, boots and valleys wear out first. A repair finds the entry point and fixes that part.
Rarely. NOAA's county record since 2015 shows no hail of 1 inch or larger, and the largest hail on record is 0.75 inch. Leaks here come more often from wind-driven rain and aging flashing, boots and valleys than from hail impact.
It starts with tracing the entry point from the attic and the roof surface. Then the repair reseals or replaces flashing, boots and valleys, replaces wet underlayment and damaged shingles, and checks the decking for rot. A written estimate comes before any work starts.
California requires roofing contractors to hold a CSLB license, usually the C-39 Roofing classification. Look up any license at CSLB before you agree to work. Deductibles are never waived or rebated.
A common question across the metro is Does homeowners insurance cover roof replacement?
Our guide to how storm claims work here goes deeper, from the same county storm and housing records. See also our local guide to common roof problems here, written from the same county storm and housing records.
Takes about a minute. Tell us the ZIP code and what the roof is doing, and a local roofer calls you back to book an inspection and written estimate.
Start your requestOr call: the number at the top of this page is answered 24/7.