# South Bay Roof Replacement
> Independent referral service that helps homeowners in Santa Clara County, from Palo Alto to San Jose 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 does a new roof cost in the South Bay?](https://southbayroofreplacement.com/guides/roof-replacement-cost-south-bay/): The closest published metro survey, the 2025 Cost vs. Value report for San Francisco, prices a midrange 30-square tear-off and replacement at roughly $38,000 in asphalt shingles and roughly $65,000 in metal. Your roof's size, pitch, material and access will move the number; a free written estimate is the only figure that applies to your home.
- [Should I repair or replace my South Bay roof?](https://southbayroofreplacement.com/guides/repair-or-replace-roof-south-bay/): For a South Bay tile roof, the question is often underlayment, not tile. For 1970s shingle tracts, granule loss and curling across sunny slopes usually mean replacement. For flat Eichler roofs, repeated ponding and split seams point the same way. Repair only when the damage is limited and the rest is sound.
- [How long does a roof last under South Bay sun?](https://southbayroofreplacement.com/guides/how-long-does-a-roof-last-south-bay/): InterNACHI estimates about 20 years for 3-tab shingles and 30 for architectural shingles, with tile at 100-plus and metal at 40 to 80. Santa Clara County's hot, dry summers are hard on shingles and flat membranes, so many South Bay roofs wear out on the early side of those ranges.
- [What are the signs my South Bay roof needs replacing?](https://southbayroofreplacement.com/guides/signs-you-need-a-new-roof/): In the South Bay, look for sun-bleached, curled or bald shingles on south and west slopes, cracked or slipped tiles with stains below, and ponding or blisters on Eichler flat roofs. Granules piling in downspouts and attic stains after the first winter rain are strong signs the roof is near the end.
- [How do South Bay reroof permits work, and who issues them?](https://southbayroofreplacement.com/guides/roof-replacement-permits-south-bay/): San Jose issues residential re-roof permits online at SJPermits.org, with fees set by the city's current building fee schedule. Each other Santa Clara County city, from Palo Alto to Milpitas, runs its own building department, and the county handles unincorporated areas. All of them sit in climate zone 4.
- [Does my South Bay home need a Class A fire-rated roof?](https://southbayroofreplacement.com/guides/class-a-fire-rated-roof-south-bay/): It depends on whether your address is in a mapped fire hazard severity zone. In the South Bay that's mostly foothill areas of Los Gatos, Saratoga, Cupertino and San Jose's east hills. In a very high zone, state law requires a Class A assembly when more than half the roof is replaced.

## El Niño 2026–27 and your roof
- [Does El Niño mean I should replace my South Bay roof now?](https://southbayroofreplacement.com/guides/el-nino-roof-replacement-south-bay/): Only if the roof is already worn out. NOAA expects a strong El Niño into early 2027, but storms aren't guaranteed. San Jose had just 0.27 inches of rain by November 11, 27% of normal, so South Bay roofers may still have dry weeks for a tear-off.

## Get a quote
- [Request a roof replacement quote](https://southbayroofreplacement.com/roof-replacement/): Complete the short form with your situation, roof age, timeline and ZIP. One independent, licensed C-39 roofer who replaces roofs in Santa Clara County contacts you, inspects the roof and writes a free estimate that should include a cool-roof product and San Jose or your city's permit. You're never obligated to hire.

## Cost and quotes
- [What will a new roof cost for a house my size in the South Bay?](https://southbayroofreplacement.com/guides/new-roof-cost-by-home-size-south-bay/): Size sets the starting point, but no honest page can price your roof from square footage. Use the estimator below to turn your home's size and pitch into roofing squares and see which cost factors apply in the South Bay. Most full replacements are five-figure jobs; a free written estimate gives your exact price.
- [What does dry rot or decking repair add to a roof replacement in the South Bay?](https://southbayroofreplacement.com/guides/roof-dry-rot-decking-south-bay/): Anywhere from a little to a lot. After tear-off, a South Bay roofer may find a few soft sheets or a whole deck that can't hold new roofing. Insist on a unit price for replacement decking in the contract, and get a free written estimate before work starts.
- [Who takes my solar panels off for a reroof in the South Bay, and what does it cost?](https://southbayroofreplacement.com/guides/solar-panel-removal-reroof-south-bay/): Plan on solar removal and reinstall adding several thousand dollars or more to a South Bay reroof, depending on how many panels you have, how they're mounted and how hard the roof is to work on. The electrical side is a solar or electrical contractor's job. Request one estimate that covers both.

## City guides
- [San Jose roof replacement: what will a new roof cost?](https://southbayroofreplacement.com/guides/new-roof-cost-san-jose/): A published midrange benchmark for the San Francisco metro, from the 2025 Cost vs. Value report, is roughly $38,000 for a 30-square asphalt-shingle replacement and roughly $65,000 for metal. Your own roof's price will differ; a free written estimate is the only real number.
- [Palo Alto roof replacement: what will a new roof cost?](https://southbayroofreplacement.com/guides/new-roof-cost-palo-alto/): The 2025 Cost vs. Value survey of a midrange 3,000-square-foot reroof in the San Francisco metro comes in at roughly $38,000 for asphalt shingles and roughly $65,000 for metal. Your roof's size, pitch, material and access will move the number; a free written estimate is the only figure that applies to your home.
- [How much does a new roof cost in Sunnyvale?](https://southbayroofreplacement.com/guides/new-roof-cost-sunnyvale/): Remodeling magazine's 2025 Cost vs. Value report puts a midrange 3,000-square-foot asphalt-shingle replacement in the San Francisco metro at roughly $38,000, and a metal replacement of the same size at roughly $65,000. That is a studied average for a defined job, not a quote for your house; request a free written estimate for your exact price.
- [What should Santa Clara homeowners know before replacing a roof?](https://southbayroofreplacement.com/guides/santa-clara-roof-replacement/): Replacing a roof in Santa Clara means planning around flat valley-floor tracts, hot dry summers, cool-roof rules for climate zone 4, no mapped fire zones and city permits. Have a licensed C-39 roofer inspect it, confirm the permit and fire rules for your address, and put the price in writing. Request a free estimate below.
- [What should Los Altos homeowners know before replacing a roof?](https://southbayroofreplacement.com/guides/los-altos-roof-replacement/): Replacing a roof in Los Altos means planning around ranch homes on large, tree-shaded lots, mostly owner-occupied houses, cool-roof rules for climate zone 4 and city permits. Have a licensed C-39 roofer inspect it, confirm the permit and fire rules for your address, and put the price in writing. Request a free estimate below.
- [What should Cupertino homeowners know before replacing a roof?](https://southbayroofreplacement.com/guides/cupertino-roof-replacement/): Replacing a roof in Cupertino means planning around Eichler and ranch tracts, Very High fire zones in the western foothills, cool-roof rules and the city's own permits. Have a licensed C-39 roofer inspect it, confirm the permit and fire rules for your address, and put the price in writing. Request a free estimate below.
- [What should Campbell homeowners know before replacing a roof?](https://southbayroofreplacement.com/guides/campbell-roof-replacement/): Replacing a roof in Campbell means planning around flat streets of 1950s-70s homes, hot dry summers, cool-roof rules for climate zone 4, no mapped fire zones and city permits. Have a licensed C-39 roofer inspect it, confirm the permit and fire rules for your address, and put the price in writing. Request a free estimate below.
- [What should Milpitas homeowners know before replacing a roof?](https://southbayroofreplacement.com/guides/milpitas-roof-replacement/): Replacing a roof in Milpitas means planning around newer homes and 1950s-70s tracts, hot summers, Moderate fire areas in the eastern hills and cool-roof rules for climate zone 4. Have a licensed C-39 roofer inspect it, confirm the permit and fire rules for your address, and put the price in writing. Request a free estimate below.
- [What should Monte Sereno homeowners know before replacing a roof?](https://southbayroofreplacement.com/guides/monte-sereno-roof-replacement/): Replacing a roof in Monte Sereno means planning around a small hillside town of owner-occupied homes, Very High fire areas, wetter foothill weather and the town's own permits. Have a licensed C-39 roofer inspect it, confirm the permit and fire rules for your address, and put the price in writing. Request a free estimate below.

## Roofers by city
- [How do I hire a roofing contractor in San Jose?](https://southbayroofreplacement.com/guides/roofing-contractor-san-jose/): Hire a C-39 licensed contractor who pulls the permit online through SJPermits.org and prices a rated cool-roof product, since all of San Jose is in climate zone 4. Match the roofer to your roof: Willow Glen and Cambrian shingles, Eichler low-slope roofs, or tile in Evergreen and Almaden. Request a free written estimate below.
- [How do I choose a roofing company in Palo Alto, especially for an Eichler?](https://southbayroofreplacement.com/guides/roofing-company-palo-alto/): Choose a C-39 licensed company with proven low-slope experience if you own one of Palo Alto's many Eichlers, because those roofs need foam or single-ply systems that meet the strict low-slope cool-roof target in climate zone 4. Older homes in Professorville and Old Palo Alto need a different crew. Request a free written estimate below.
- [How do I hire a roofer for a foothill home in Los Gatos or Saratoga?](https://southbayroofreplacement.com/guides/roofing-company-los-gatos-saratoga/): Hire a C-39 licensed roofer who knows foothill rules: many Los Gatos and Saratoga homes near the Santa Cruz Mountains are in mapped fire hazard zones that require Class A, and both towns are in climate zone 4 for cool-roof rules. Each town has its own permit office. Request a free written estimate below.
- [How do I pick a roofing company in Sunnyvale or Mountain View?](https://southbayroofreplacement.com/guides/roofing-company-sunnyvale-mountain-view/): Pick a C-39 licensed company that prices a rated cool-roof product, since Sunnyvale and Mountain View are both in climate zone 4. Then match it to your home: Eichler tracts need low-slope expertise, townhomes may need HOA sign-off, and many roofs carry solar. Each city issues its own permit. Request a free written estimate below.

## Neighborhood estimates
- [Which San Jose neighborhoods are due for new roofs?](https://southbayroofreplacement.com/guides/roof-replacement-by-neighborhood-san-jose/): San Jose's official permit files show which ZIP codes have had the most and fewest reroofs since 2001, relative to older housing. East San Jose and Alum Rock ZIPs show the lowest rates; Cambrian and Almaden Valley the highest. Low rates suggest where roofs may be due. A free roof inspection tells you about yours.

## Materials and roof types
- [How much does a metal roof cost in the South Bay: standing seam or stone-coated?](https://southbayroofreplacement.com/guides/metal-roof-cost-south-bay/): In the South Bay, a metal reroof is typically a larger project than asphalt, frequently running well into the tens of thousands of dollars. Stone-coated steel tends to cost less than standing seam; both outlast shingles and can be Class A. Roof size, pitch and tear-off set your price, which a free estimate gives you.
- [Replacing a flat roof in the South Bay: TPO, torch-down and what drives the price](https://southbayroofreplacement.com/guides/flat-roof-replacement-south-bay/): Most flat roof replacements in the South Bay cost in the tens of thousands of dollars, and the membrane type matters less than drains, parapet flashing, insulation and access. TPO single-ply and torch-applied modified bitumen are the usual choices. Your exact price comes from a written estimate after the roofer inspects the roof.
- [Does my the South Bay tile roof need new tile, or only new underlayment?](https://southbayroofreplacement.com/guides/tile-roof-underlayment-south-bay/): Often just the underlayment. Clay and concrete tiles can outlast several layers of the felt or synthetic underlayment beneath them, so many the South Bay tile roofs are lifted, re-underlaid and relaid with replacement tiles where needed. Broken, brittle or discontinued tile can tip it toward full replacement. A free written estimate prices both options.
- [Eichler roof replacement in the South Bay: foam, TPO or built-up?](https://southbayroofreplacement.com/guides/eichler-roof-replacement-south-bay/): The usual choices for a South Bay Eichler are spray polyurethane foam with a coating, a single-ply membrane such as TPO, or modified bitumen. Each needs proper drainage and edge details, and adding insulation above the deck is common. Costs vary with size and repairs; get a free written estimate.

## Codes, permits and fire
- [Cool roof rules in the South Bay: does a new roof have to be reflective?](https://southbayroofreplacement.com/guides/cool-roof-requirements-south-bay/): A cool roof is a roofing product rated to reflect sunlight and release heat. In the South Bay, many reroofs replacing more than half the roof must use one, because parts of the region are in climate zones where the Energy Code requires it. Find your city's zone below and ask for a free written estimate.

## Planning and hiring
- [How long does a roof replacement take in the South Bay, from contract to final inspection?](https://southbayroofreplacement.com/guides/how-long-does-a-new-roof-take-south-bay/): On-site work for a typical South Bay home often takes a few days, but the whole project, from signed contract to final inspection, takes longer because of permits, materials, weather and any decking repairs. Complex, steep, tile or flat roofs take more time. Ask for a written schedule with your free estimate.

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

## About
- [About South Bay Roof Replacement](https://southbayroofreplacement.com/about/)
- [Privacy](https://southbayroofreplacement.com/privacy/)
- [Terms](https://southbayroofreplacement.com/terms/)