# San Mateo Roof Replacement
> Independent referral service that helps homeowners in San Mateo County, from Daly City to Menlo Park and the coast decide whether to replace an old roof and connects them with an independent, licensed C-39 roofing contractor for a free estimate. Guides cite public sources (Cost vs. Value 2025, city and county permit pages, California law including SB 1301). Updated November 11, 2026.

## Key answers
- [How much is a new roof on the Peninsula?](https://sanmateoroofreplacement.com/guides/roof-replacement-cost-peninsula/): No public source prices Peninsula reroofs city by city. The closest published benchmark is the 2025 Cost vs. Value report: $38,289 for a defined 3,000-square-foot asphalt shingle tear-off in its San Francisco market and $36,391 for the Pacific region. Use it to sanity-check written bids, not as a quote.
- [Repair or replace: what's right for a Peninsula roof?](https://sanmateoroofreplacement.com/guides/repair-or-replace-roof-peninsula/): On a Peninsula home from the 1950s or 60s, repair makes sense when one area fails and the rest is sound. Replace when shingles are curling across whole slopes, a low-slope membrane is blistered, moss has lifted shingles on the fog side, or the roof already has two layers.
- [How many years will a Peninsula roof last?](https://sanmateoroofreplacement.com/guides/how-long-does-a-roof-last-peninsula/): Expect about 20 years from 3-tab shingles and about 30 from architectural shingles, per InterNACHI, with tile and metal lasting far longer. On the Peninsula, fog-belt roofs in Daly City and Pacifica lose ground to moss and corrosion, while sunny bayside roofs lose granules to UV.
- [How can I tell my Peninsula roof needs replacing?](https://sanmateoroofreplacement.com/guides/signs-you-need-a-new-roof/): Peninsula roofs give a few clear signals: moss lifting shingles on fog-side homes, curled or bald shingles on sunny bayside slopes, puddles and split seams on mid-century low-slope roofs, and attic stains after storms. When signs show up across the roof rather than in one spot, plan a replacement.
- [Which Peninsula building department issues my reroof permit?](https://sanmateoroofreplacement.com/guides/roof-replacement-permits-peninsula/): It depends on your address. San Mateo County has 20 incorporated cities and towns, from Daly City to East Palo Alto and Portola Valley, and each has its own building department. Unincorporated areas such as Emerald Hills, El Granada and Montara go through the county. The table links all 21 offices.
- [Do I need a Class A roof in the Peninsula hills or on the coast?](https://sanmateoroofreplacement.com/guides/class-a-fire-rated-roof-peninsula/): If your home is in a mapped very high fire hazard severity zone, state law requires a Class A assembly when more than half the roof is replaced. On the Peninsula that's most likely in foothill and coastside areas. Check the 2025 state map for your address, then confirm with your building department.

## El Niño 2026–27 and your roof
- [Is El Niño a reason to reroof my Peninsula home this winter?](https://sanmateoroofreplacement.com/guides/el-nino-roof-replacement-peninsula/): Only if the roof is already failing. NOAA expects a strong El Niño into early 2027, but impacts aren't guaranteed. San Francisco Airport, the Peninsula's NWS station, had 0.45 inches of rain by November 11, 32% of normal, so there may still be dry weeks to schedule work.

## Get a quote
- [Request a roof replacement quote](https://sanmateoroofreplacement.com/roof-replacement/): Use the form to tell us your situation, roof age, timeline and ZIP code. One independent, licensed C-39 roofer who works in San Mateo County gets your request, contacts you to inspect the roof and gives you a free written estimate. There's no cost to you and no obligation to hire.

## All guides
- [Guide index](https://sanmateoroofreplacement.com/guides/): every guide on this site by topic

## About
- [About San Mateo Roof Replacement](https://sanmateoroofreplacement.com/about/)
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