Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
After
Before
AfterFast, Reliable Roofing Company Across San Martin
Roofing work in San Martin usually costs between $8,500 and $24,000 for a full replacement on a ranch-style home, with repairs running $450 – $1,800 depending on what we find under the shingles. Those are real numbers for this market, not a national average. If you’re calling from Llagas Road, New Avenue, or a parcel up near the Diablo Range foothills, our crews know exactly what your roof is up against: wind-driven rain off Pacheco Pass in winter, upper-90s heat baking low-slope planes in summer, and a county permit process that catches out contractors who mostly work Gilroy or Morgan Hill. Call (743) 200-8347 and you’ll get a live person, not a voicemail tree.
We’re a Roofing Company that works the unincorporated side of Santa Clara County regularly, and we price San Martin jobs for what they actually are: multi-structure properties where the house, the horse barn, and the workshop each need their own material and their own square count. Every visit starts with a written price before anything gets touched.
Why Mercer Roofing Is San Martin’s Preferred Roofing Company
Homeowners in San Martin call us because we show up the way people here want contractors to show up: named, badged, and expected. Before any technician steps onto your property, you get their name and photo sent to you. They arrive in a marked uniform with a photo ID they present at the door. That’s the Threshold Standard, and it’s not optional at any independently owned Mercer location. If you’re home alone, or you’ve got young kids, you’ll know exactly who’s walking up your driveway before the doorbell rings.
Grant Whitlock runs our team with one rule: no work begins without a written price in your hand. That’s not a sales tactic. It’s how we keep quotes honest on properties where one roof turns out to be three roofs. We also put a 365-Day Done Right Promise behind every repair, in writing, with a free second visit if the fix doesn’t hold. When you call the San Martin office line at (743) 200-8347, a real human answers, day or night.
Free Roof Estimate in San Martin
A Free Roof Estimate in San Martin is a full property walk, not a drive-by from the truck. Because most parcels here include a residence plus at least one agricultural or workshop structure, we inspect every roof plane on the property: the house, the barn, the detached garage, the horse shelter if it has roofing. We climb what’s safe to climb, check flashing at every penetration, and photograph the trouble spots so you can see what we see before any number gets quoted. After the walk, you get a written line-item estimate that separates the house from the outbuildings and specifies the material for each structure.
What the Estimate Includes
Every estimate names the brand and type of shingle or panel we’re pricing (GAF architectural shingles on the house, for example, and standing-seam metal on the barn), the square count per structure, the condition of the decking underneath, and whether the parcel sits in a county fire hazard zone that triggers Class A material requirements. You’ll also see the permit line broken out separately, because county permits on San Martin parcels are not optional and they’re not free.
When to Schedule One
The best time to schedule a free estimate is before a failure becomes a leak that’s already inside. If you’re seeing granule loss in the gutters, cracked or curling shingles on the west and south planes, or you heard a storm rip through overnight off Pacheco Pass and something doesn’t look right at the ridge, call (743) 200-8347. We’ll come out, do the walk, and put the written estimate in your hand before you decide anything.
Roofing Contractor in San Martin
A Roofing Contractor in San Martin has to know two things that city roofers never deal with: Santa Clara County’s building department and the fire-zone compliance inspection it attaches to permits on High and Very High Fire Hazard Severity parcels. We pull the county permit on every job, schedule the inspections ourselves, and make sure the material on the roof matches what the county fire officer will sign off on before we order a single pallet. When a contractor tells you the Class A rating is an upgrade, they’re telling you they don’t work San Martin much.
County Permits, Handled
Unincorporated San Martin means no city hall to walk into. Every permit goes through Santa Clara County, and the process is slower if you’re not used to it. We are. We know which parcels fall inside the fire hazard zones, what the compliance inspector will check, and how to sequence the work so the county walk happens on schedule, not two weeks after you expected the roof done.
Multi-Structure Properties, One Contract
Most San Martin estimates are not one roof. They’re a house roof, a metal barn roof, and maybe a workshop. We bid them separately on a single contract so you can see exactly what each structure costs, and we don’t cross-subsidize one structure’s price by burying it in another. You approve each line item in writing before work starts.
Trusted Brands We Service in San Martin
We install and repair GAF, CertainTeed, and Owens Corning shingle systems, and we stock common components for these brands at our Bay Area yard so a San Martin repair doesn’t sit waiting on a distributor. GAF architectural shingles are the most common request on ranch-style homes here because they hold up to the valley’s UV load better than three-tab. For barns and outbuildings, we default to standing-seam or corrugated metal rated for the fire zone. If you’ve got a roof we installed, we service it under the same 365-day written guarantee whether it’s the house or the horse barn.
Common Roofing Problems We See in San Martin Homes
- Wind-driven rain pushed under ridge caps. San Martin sits at the open mouth of Pacheco Pass, and winter storms push rain nearly horizontally. Ridge caps and flashing around vent pipes take the brunt, and we routinely find water stains inside attics where the shingles themselves look fine from the ground.
- UV-baked shingles on south and west planes. Upper-90s summer days thermal-cycle asphalt shingles on low-slope sections until they crack, cup, and lose granules. Homes built in the 1960s and 70s often still carry their original or second-layer shingles, which are well past that point.
- Original skip sheathing that’s too brittle to re-nail. On ranch homes from the 60s through the 80s, the decking underneath is often 1x boards spaced with gaps. When it’s been cooked for 50 years and soaked by wind-driven rain, it splinters when you try to fasten new shingles, and it has to be re-decked.
- One roof quoted when the property has three. The house, the barn, and the detached workshop each need their own evaluation. A contractor who quotes a single square count for a San Martin parcel has either not walked the property or doesn’t intend to roof the outbuildings correctly.
Pricing for Roofing Company in San Martin, CA
Roof repair in San Martin runs $450 – $1,800 for typical flashing, valley, or small leak fixes, with the higher end covering sections that need re-decking once the shingles come off. A full architectural shingle replacement on a 1,800 – 2,400 square foot ranch home in this area lands between $14,000 and $22,000, and re-decking one plane in plywood adds roughly $1,800 – $3,200 depending on size. Standing-seam metal on a barn or workshop starts around $9,500 and goes up with roof complexity. Class A fire-rated materials required on county fire-zone parcels add 10 – 15% over standard shingle, and that is a permit requirement, not an option. Every estimate is free, written, and line-itemed, and the price you approve is the price you pay. Call (743) 200-8347 to schedule yours.
We Also Serve Cities Near San Martin
Mercer Roofing crews serve San Martin and the surrounding South Valley communities, including Morgan Hill, Gilroy, Los Gatos, and Campbell. If your property straddles a county line or you own parcels in more than one town, one call to (743) 200-8347 covers it. We’ll dispatch the same Threshold Verified crews to each address.
Serving San Martin, CA - Our Local Coverage Area
We’re based in the San Martin area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Roofing Company in San Martin
It needs a permit. San Martin is unincorporated, so there is no city building department to route around; every roofing permit here is issued by Santa Clara County Building Department, and if your parcel sits in a High or Very High Fire Hazard Severity Zone, the county requires a fire-zone material compliance inspection before the job can close. A contractor who tells you a permit isn’t needed is leaving you with an unpermitted roof that can stall a future sale. We pull the permit, schedule the inspection, and the compliance walk happens before we call the job done. Call (743) 200-8347 with your parcel number and we’ll tell you exactly what the county requires for your address.
Because most quotes are not quoting the same job. One contractor may price only the house roof while another includes the barn and workshop, or one may bid standard shingles while another correctly recognizes that your parcel sits in a county fire hazard zone where Class A material is mandatory. If a bid ignores the outbuildings or the fire-zone rating, it’s not a cheaper roof; it’s an incomplete one that will balloon once the county inspector shows up. We write the permit requirements and every structure into the estimate before you sign anything. Call (743) 200-8347 for a written quote that covers the whole property.
Sometimes yes, and the most common surprise on San Martin ranch homes is the decking underneath: original 1x skip sheathing that’s too brittle to take a nail. We handle this by writing a decking allowance into the contract up front, stated per sheet or per square, so if we find rot or splintering, the price for that work is already agreed and you approve it in writing before we replace anything. On a 1970s home off Llagas Road, our crew tore off baked, cracked three-tab, found the skip sheathing couldn’t be re-nailed, re-decked that plane in plywood, laid ice and water shield in the valleys, and put GAF architectural shingles on the house while standing-seam metal went on the adjacent horse barn, all on the same visit. Both roofs passed the county fire-zone compliance inspection the first walk. The surprise is only a problem when the contractor hasn’t priced for it; we price for it upfront.
We typically put composition shingles on the house and metal on the barn, and the reason is practical: a barn roof has different pitch, different structural loading, and often no attic ventilation, so standing-seam or corrugated metal handles the San Martin heat and wind better than shingles over the long run. If the barn sits in a fire hazard zone, the metal also needs to meet the county’s Class A standard, which standard standing-seam does. The house gets architectural shingles like GAF or CertainTeed because they perform well on gently pitched ranch roof planes and meet Class A fire ratings where the county requires them. Call (743) 200-8347 and we’ll walk each structure with you and explain why the material recommendation is what it is, in plain English.
Because the wind here doesn’t come straight down; it comes through Pacheco Pass at speed and pushes rain sideways under whatever it can get underneath. Ridge caps, sidewall flashing, and pipe collars fail long before shingle granule loss becomes the problem, and that’s what we see over and over on San Martin homes built from the 1960s through the 90s. When we replace a roof here, we upgrade the flashing details as standard: wider drip edge, properly lapped valley metal, and ridge caps nailed and sealed for horizontal rain, not just gravity. If your roof is leaking at the ridge or around a vent while the shingles still look okay, call (743) 200-8347 for a targeted repair estimate.
If you own property in San Martin and you want a roof priced honestly, permitted correctly, and installed by technicians who show you a photo ID before they step inside your gate, call us at (743) 200-8347. You’ll get a live person, a free written estimate, and a straight answer about what your roof actually needs.
Written by Grant Whitlock, Owner at Mercer Roofing, serving San Martin and the South Santa Clara Valley since 2000.