Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
After
Before
AfterFast, Reliable Roof Replacement Across San Dimas
A full roof replacement in San Dimas typically runs $14,000 to $32,000 for a standard ranch-style home, with hillside and tile projects landing higher. Our crews know the city’s mix of 1960s tract homes, foothill estates, and acreage parcels off Via Verde and San Dimas Canyon Road. We coordinate tear-off, decking, underlayment, and the final material install around your family’s schedule, and you’ll have a written price before any work starts. Call (424) 766-4937 for a free estimate.
Why Birchbark Roofing Is San Dimas’s Preferred Roof Replacement Company
San Dimas homeowners call us because we treat the property like a lived-in home, not a job site. Shoe covers at the door, drop cloths through the hallway, and a photo of the completed clean-up before the crew leaves are standard on every job. Erik Lindgren, who leads our team, set that expectation from day one: the roofer’s name should be attached to the work, and the work should hold up to a long look. The 365-Day Done Right Promise is stamped on every replacement we perform. If it’s not done right, we make it right.
The hillside parcels north of the 210 Freeway and the open acreage that edges up against the San Gabriel foothills each bring their own permitting and material demands. That local knowledge means we order the right materials the first time and schedule inspections without surprises during the job. Because crews are dispatched from our Los Angeles office and serve San Dimas directly, we respond to calls across the city quickly, from the valley floor near the 57 up into the hills above Bonita and Lone Hill.
New Roof Installation in San Dimas
New Roof Installation in San Dimas usually comes up two ways: the original roof on a 1960s or 70s ranch is beyond another repair, or a new build or addition is going up and needs a roof from scratch. On valley-floor homes, this means full tear-off, deck inspection, fresh underlayment, and new asphalt or architectural shingles. A standard single-story ranch in San Dimas runs $15,000 to $26,000. Homes with steep pitches, complex valleys, or tile upgrades push toward the upper $20s and $30s. You’ll see your exact number in writing before we begin.
Decking and structural decisions
Most original roofs in San Dimas were built over 1/2-inch plywood or even spaced-board decking that has sagged or delaminated after 50+ summers of triple-digit heat. We check every sheet during tear-off. If the deck won’t hold the fastener pattern required for wind-uplift resistance, we replace it with code-rated sheathing before laying underlayment. That step gets priced into the written quote, not sprung later.
Material choices that hold up in San Dimas heat
Asphalt shingles in San Dimas take more punishment than the same product in a coastal city. We’re seeing granule loss and cracking accelerate on older composition roofs across the valley floor. For replacement we typically recommend architectural shingles from GAF or Owens Corning, which carry better heat-resistance ratings and stronger wind warranties for the Santa Ana gusts that come down through the foothill passes.
Reroofing in San Dimas
Reroofing in San Dimas means a complete roof replacement over an existing roof system, and on most valley homes that means one of two paths: a full tear-off to the deck, which city code requires when there are already two layers, or a re-cover where a single layover is permitted. For the 1950s-through-70s ranch stock around town, the original or first-replacement roof is almost always past serviceable life. A full tear-off reroof on a typical San Dimas ranch runs $16,000 to $28,000. A re-cover, where code allows it, runs $11,000 to $19,000.
Fire-zone compliance on foothill parcels
If your home sits north of the 210 in the Very High Fire Hazard Severity Zone, the re-roofing permit requires Class A fire-rated materials. That bars restoring an original wood shake roof, period. The discovery usually happens at the permit counter, not at the curb, and it changes the scope immediately. We handle the paperwork for you and price the job assuming the Class A requirement from the first line on the estimate.
Acreage properties and outbuildings
On acreage parcels off Via Verde and San Dimas Canyon Road, a reroof often involves more than the house. Detached garages, shops, and ADUs may sit under the same failing roof system, and each structure has its own deck condition and drainage pattern. We scope every structure on the lot before writing a quote, because the last thing you want on open ground is a price that doesn’t include the shop roof you expected to be part of the job.
Trusted Brands We Service in San Dimas
We install and service roofing systems from GAF, CertainTeed, and Owens Corning, with full manufacturer warranties intact on every full replacement. Because we stock common materials and have direct supply lines into San Dimas, most jobs start without the two-week wait some crews pass along. If you have a specific shingle line or color from an existing roof you want matched, bring it up during the estimate and we’ll source it before the job is scheduled. We don’t install a material we wouldn’t put on our own crew’s homes, and we stand behind every brand we carry with the same 365-Day Done Right Promise.
Common Roof Replacement Problems We See in San Dimas Homes
- Wood shake on VHFHSZ hillside parcels. Many foothill homeowners assume they can reshingle in kind. City code bars restoring original wood shake in the fire zone, so the permit mandates an upgrade to Class A tile or rated composition. We flag this at the estimate, not after the old roof is off.
- Santa Ana wind damage at gable ends and ridge lines. Gusts funneling through the San Gabriel passes hit exposed edges harder than they do in flatland neighbors like Pomona. We see seal failures, lifted starters, and peeled drip edge on roofs that were never under-fastened for local wind loads.
- Original decking too thin for modern tile or shingle loads. Ranches built from the late 50s through the 70s often have 1/2-inch decking that sags under a new tile roof or won’t hold the fastener pattern code now requires. Re-decking gets priced into our written quote when the tear-off reveals it.
- Drainage failures on acreage lots. On open parcels outside city limits, roof runoff sheets across the pad and pools against outbuilding and ADU footings. We grade the downslope side during the job so the new roof plane carries water away instead of into the foundation.
Pricing for Roof Replacement in San Dimas, CA
A full roof replacement in San Dimas runs $14,000 to $32,000 for most homes, with three big factors moving the number: your address relative to the fire zone, the condition of the existing deck, and whether the property is in-city or on county-permitted acreage. A standard valley-floor ranch with full tear-off and architectural shingles lands near $16,000 to $22,000. Hillside parcels requiring Class A tile or rated composition run $24,000 to $40,000. Acreage jobs with outbuildings, longer material hauls, and grading work move higher. Every quote includes the written price line by line, so you’ll see exactly what the job costs before the first shingle comes off. Call (424) 766-4937 for a free, written estimate.
We Also Serve Cities Near San Dimas
Beyond San Dimas, our crews cover La Verne, Glendora, Covina, and Azusa. If you’re weighing a roof replacement and want the same written pricing and clean-up standard our San Dimas customers get, we’re a short drive away. For the full breakdown of our approach, see our Roof Replacement page.
Serving San Dimas, CA - Our Local Coverage Area
We’re based in the San Dimas 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 Roof Replacement in San Dimas
Yes. Parcels in the hillside tracts north of the 210 fall inside LA County’s Very High Fire Hazard Severity Zone, and the re-roofing permit requires Class A fire-rated materials. Original wood shake cannot legally be restored, even if the homeowner asks for it. The requirement applies to full replacements and most re-roofs on those parcels. Call (424) 766-4937 before you plan the scope, and we’ll confirm your zone and materials before a quote is written.
Unincorporated acreage outside San Dimas city limits answers to Los Angeles County, not the City of San Dimas. That means county permitting, county inspections, and sometimes different fire and drainage requirements than an in-city parcel two streets over. We pull permits in both systems and schedule inspections accordingly, so the job doesn’t stall at the counter. Estimates account for the correct jurisdiction from the first call.
No, if your parcel sits in the VHFHSZ north of the 210. The code bars restoring or re-covering original wood shake, so a tear-off and Class A replacement is the only legal path. On valley-floor homes outside the zone, a re-cover may be allowed depending on the number of existing layers and deck condition. We’ll verify your zone and layer count before recommending either option. Call (424) 766-4937 and we’ll walk the roof with you.
Santa Ana gusts funneling through the San Gabriel passes hit exposed ridges, gable ends, and roof edges with more force here than in flatland neighbors. That means we use heavier starter strip fastening, additional edge metal anchors, and the manufacturer’s high-wind nailing pattern on every San Dimas replacement. The 365-Day Done Right Promise covers windshield failures, but we’d rather fasten it right the first time than come back for a repair.
Yes, and it should be in the written price from day one. On acreage parcels off Via Verde or San Dimas Canyon Road, a detached garage, shop, or ADU may sit under a different roof system than the main house, with its own deck condition and drainage. We scope every structure on the lot before writing the estimate, including grading work so runoff from the new roof doesn’t sheet toward a foundation. Call (424) 766-4937 and we’ll come walk the whole property.
Written by Erik Lindgren, Owner at Birchbark Roofing, serving San Dimas and the surrounding San Gabriel Valley.