Roofing Company in San Lorenzo - Written Price, Workmanship Warranty

Fast, Reliable Roofing Company Across San Lorenzo

Roofing work in San Lorenzo usually costs between $450 and $1,900 for repairs, and $11,500 to $24,000 for a full replacement on the 1940s and 1950s ranch homes that fill this unincorporated Alameda County community. Those are the numbers we quote most often, and they reflect the county permit process, the low-slope sections that need modified bitumen instead of shingle, and the haul distance for materials on acreage lots. If your roof is leaking or you’re seeing cracked shingles after a dry summer, call us at (361) 320-9467. We’ll put a written price in front of you before any work starts.

Call (361) 320-9467

We know San Lorenzo, and we know why roofs here fail. The housing stock is mostly post-WWII ranch construction with original framing that predates modern plywood decking. When the October rains hit after a long dry summer, the cracks that UV exposure opened up in August start letting water through at the valleys, around vent pipes, and along the flashing. That’s not a surprise to us. We plan for it, and we scope every job around it.

Why Brennan Roofing Is San Lorenzo’s Preferred Roofing Company Company

Homeowners in San Lorenzo call us because they’re tired of roofers who quote one number on the phone and a different number at the door. The Garrison Standard, which is how Roofing Company operates, means the price goes on paper before any work begins, and it doesn’t move. You know the number before you commit. That discipline matters in an unincorporated community where county permits already add a layer of coordination.

Every technician we send to a San Lorenzo home is background-checked, uniformed, and accountable to a written standard. Travis Oakley, who runs our operations, holds every crew to the same code on every job. When a homeowner lets a roofing crew onto their property, they shouldn’t have to wonder who those people are. With Brennan Roofing, you’ll never have that question.

Phones are answered by a live person, 24/7. No voicemail. No callback queue. If it’s raining and your roof is leaking at 2 a.m., a person picks up the phone and starts getting help moving. That’s the standard, not the exception.

Roofing Contractor in San Lorenzo

Roofing contractor work in San Lorenzo almost always involves two things that generic roofing companies miss: county-level permitting through Alameda County Building Services, and low-slope sections that can’t take standard shingles. A roof tear-off and replacement on a 1,100-square-foot ranch here typically runs $12,000 to $18,000, depending on how much decking needs to be replaced and whether the roof has flat-roof additions or torch-down sections. If a contractor quotes you a price without asking about the permit timeline or the roof pitch, walk away.

The County Permit Variable

San Lorenzo is unincorporated, which means there’s no city building department issuing permits or sending inspectors. Alameda County handles all of it. Plan review can take days longer than neighboring cities with their own departments, and inspection windows run on county scheduling. We factor that into the timeline before we quote, so you’re not sitting under tarp waiting for a sign-off you didn’t know was coming.

Mixed-Pitch Roof Scoping

Many San Lorenzo homes have a shallow-pitch main roof plus a flat-roof addition or carport. Shingle doesn’t shed water on a 2:12 pitch or lower, and that’s where ponding starts. The right scope often includes architectural shingles on the steeper planes and torch-down modified bitumen over the low-slope sections, with drainage detailed at the transition between the two. We quote both in the written estimate, not as a change order later.

Commercial Roofing in San Lorenzo

Commercial roofing in San Lorenzo means low-slope buildings: the shops, warehouses, and office strips along Hesperian Boulevard, plus the larger acreage properties with outbuildings and equipment sheds. A torch-down or rolled modified bitumen roof on a small commercial building here typically runs $8 to $14 per square foot installed, with full tear-off and re-roof on the upper end of that range. County permitting applies, and the inspection process is the same one we manage for residential work, just on a bigger footprint.

Flat and Low-Slope Commercial Systems

Most commercial roofs in San Lorenzo are modified bitumen or built-up systems, and they fail at the seams and penetrations first. UV exposure over a dry East Bay summer opens those seams, and the first hard rain finds them. We inspect around HVAC curbs, vent stacks, and the transitions where a flat roof meets a parapet wall. Those are the failure points, and they’re where the quote should focus.

Acreage and Outbuilding Scopes

On larger lots east toward the hills, commercial and residential roofs often sit on outbuildings, detached shops, and ADUs that a standard residential scope doesn’t account for. A dumpster and lift need access to the roof plane, and if they can’t reach it, labor hours change the price. We walk the entire property before quoting, measure every structure that needs work, and write the access plan into the estimate. No surprises after the contract is signed.

Trusted Brands We Service in San Lorenzo

We install and service roofing systems from GAF, CertainTeed, Owens Corning, IKO, Atlas, and Tamko. For San Lorenzo’s low-slope and flat sections, we also work with Boral’s roofing lines. The point isn’t to sell you a brand name, it’s to match the material to your specific roof geometry and budget. We stock common components locally in the Bay Area so San Lorenzo jobs don’t stall waiting a week for ridge vent or drip edge. When you call (361) 320-9467, we’ll explain the real difference between an Atlas architectural shingle and a Tamko laminate, in plain English, and let you choose with the price on the table.

Common Roofing Company Problems We See in San Lorenzo Homes

• County permit timeline assumptions. Crews that do most of their work in San Leandro or Hayward assume a city department will turn plans around fast. Alameda County doesn’t work that way, and jobs stall when nobody planned for county review windows. We schedule around the county’s process from day one.
• Covering low-slope sections with shingle. San Lorenzo ranches don’t have uniformly steep roofs. Flat-roof additions, carports, and shallow-pitch originals need modified bitumen or torch-down, and if a roofer prices the whole roof as shingle, water finds the low spot within a season or two.
• Skipping the August inspection. Dry heat bakes old shake and first-generation composition shingle until cracks open at valleys, flashing, and pipe boots. By October, those cracks are leaks. A late-summer inspection catches them before the storm does, and it’s the single highest-value maintenance move a San Lorenzo homeowner can make.
• Under-scoping haul and access on acreage lots. Properties off Via Nueva, Bockman Road, and along the valley edge often have outbuildings, detached garages, and ADUs. If the dumpster and lift can’t reach the roof plane, labor hours climb. We measure access before we quote, and the number on paper reflects the real logistics.

Pricing for Roofing Company in San Lorenzo, CA

We Also Serve Cities Near San Lorenzo

Brennan Roofing works throughout the East Bay. Along with San Lorenzo, our crews cover Castro Valley, San Leandro, Union City, and Oakland. Each area has its own permit reality and housing stock, and we scope every job to the local conditions, not to a generic template.

FAQs About Roofing Company in San Lorenzo