Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
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Before
AfterRoofers in San Lorenzo, CA
Roofers in San Lorenzo work on one of California’s most uniform housing stocks: nearly the entire community was built by David D. Bohannon between 1945 and 1955 as a single postwar planned development. That means most roofs here are aging through the same 70-80 year milestones at once, often with original board sheathing still in place beneath two or three re-roof layers. We’re Birchbark Roofing, and we coordinate dispatch for San Lorenzo from our Bay Area office. If you’re seeing moss streaks, soft spots, or granules in the gutters, call us at (424) 766-4937 and we’ll schedule a free estimate with a written price before any work starts.
Why San Lorenzo Homes Are Different
San Lorenzo sits in the flat East Bay lowlands where marine layer fog rolls in regularly and lingers until late morning, especially on north- and west-facing roof planes. That persistent dampness drives faster moss and algae growth on older composition shingles and accelerates granule loss compared to hillside neighborhoods just inland. The Bohannon-era homes here, typically 900-1,200 square feet with low-pitched gable roofs, were originally built with diagonal or skip-board sheathing rather than plywood. When we tear off old shingles, we routinely find those original boards still in place, often with dry rot or bounce from decades of moisture cycling. Because San Lorenzo is unincorporated Alameda County, roofing permits route through the Alameda County Building Department, not a city hall. Contractors unfamiliar with this quirk sometimes lose days searching for a municipal permit counter that doesn’t exist.
Our Main San Lorenzo Services
San Lorenzo homeowners call us most often for roof repair and roof replacement. Here’s what each job looks like in this community.
Roofing Company in San Lorenzo
As a Roofing Company in San Lorenzo, we handle everything from minor leak diagnosis to full roof system evaluations for Bohannon-era homes. Our background-checked, uniformed technicians arrive with shoe covers and drop cloths, and we coordinate door schedules with families who have pets or kids at home. Every visit ends with a photo of the completed clean-up before we leave.
Roof Repair in San Lorenzo
Most Roof Repair in San Lorenzo involves addressing the damage that coastal moisture causes: moss-deteriorated shingles, flashing gaps at original chimney crickets, or soft sheathing spots where fog-driven condensation has collected for years. We use pet-safe product choices where available and explain every repair in writing before we start.
Roof Replacement in San Lorenzo
A Roof Replacement in San Lorenzo almost always means working through multiple old roof layers down to that original 1940s or 1950s board sheathing. We replace rotted boards with modern plywood, install proper underlayment, and finish with shingles from GAF, CertainTeed, or Owens Corning. The 365-Day Done Right Promise covers every replacement we perform.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in San Lorenzo
We work with GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral materials, and we stock common repair components locally for faster turnaround on San Lorenzo jobs. See our brands for full details on warranty tiers and color options.
Pricing for Roofers in San Lorenzo, CA
| Service | Typical range in San Lorenzo |
|---|---|
| Minor shingle repair (1-3 shingles) | $180 - $340 |
| Flashing repair around chimney or vent | $320 - $580 |
| Small leak diagnosis and patch | $280 - $520 |
| Partial re-roof (1-2 planes) | $2,800 - $5,200 |
| Complete roof replacement, small home (900-1,200 sq ft) | $12,000 - $18,500 |
| Complete roof replacement with sheathing replacement | $15,500 - $24,000 |
| Moss treatment and preventive coating | $450 - $850 |
| Gutter cleaning and roof debris removal | $220 - $380 |
| Skylight repair or reflash | $380 - $720 |
| Emergency tarp service | $280 - $480 |
Prices in San Lorenzo run higher when we need to replace original board sheathing or work around multiple old roof layers. You’ll always see your exact number in writing before we start, and that written price doesn’t change once work begins.
Neighborhoods We Serve in San Lorenzo
We work across all of San Lorenzo’s residential areas, from the original Bohannon tracts near Hesperian Boulevard to the neighborhoods bordering San Leandro and Castro Valley. Most appointments are scheduled within a few days, with Bay Area dispatch keeping crews moving efficiently through the East Bay.
- Bohannon Park area
- Hesperian Corridor
- San Lorenzo Village core
- Washington Manor vicinity
- Neighborhoods near Lewelling Boulevard
Service Area – Cities Near San Lorenzo
Our crews serve the broader East Bay from San Lorenzo, including Castro Valley, CA to the east, San Leandro, CA to the north, Union City, CA to the south, and Oakland, CA to the west. Dispatch and scheduling are coordinated from our Bay Area office.
Serving San Lorenzo, CA - Our Local Coverage Area
We’re based in the San Lorenzo 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 Roofers in San Lorenzo
Yes. Because San Lorenzo is unincorporated Alameda County, we file all roofing permits directly with the Alameda County Building Department. Contractors who expect a city permit counter often face delays; we know the county process and keep jobs on schedule. Call (424) 766-4937 to discuss your project.
Most San Lorenzo estimates are scheduled within two to four business days, and a live person answers our phone 24 hours a day to set appointments. Emergency tarping for active leaks is prioritized when weather threatens. Call (424) 766-4937 to check current availability.
Some San Lorenzo neighborhoods, particularly within the original San Lorenzo Village planned community, have architectural guidelines or HOA oversight for exterior changes. We review these requirements during our estimate and include any needed documentation in our permit filing. Call (424) 766-4937 and we’ll confirm what’s required for your specific street.
What happens when you call
- 1A real person answersNo phone trees - talk to a local roofing pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What San Lorenzo Customers Say
"Roof repair and they were meticulous about the cleanup, tarps over the garden beds and a magnet sweep for nails. We have a dog and a toddler so that mattered a lot."
- Thaddeus Bloom"New roof after hail. They covered everything below, kept the site neat each day, and did a full nail sweep of the whole yard twice. Thoughtful people."
- Caroline Prejean"New roof section and gutter guards. They protected everything below, worked tidy, and did a full nail sweep of the yard and driveway at the end. Thoughtful crew."
- Mariana Lopez