Metal roofing
Architectural shingles
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roofing Company Across Sunnyvale
Roofing work in Sunnyvale comes down to one decision: which materials actually hold up against coastal fog, UV exposure, and the Wildland-Urban Interface codes that now govern most of the city. We see homes every week where the shingles look passable from the street, but the fasteners have started to rust, the underlayment has turned to powder, or the original 1960s wood shake has become a fire liability. Brennan Roofing Co San Jose serves all of Sunnyvale with roofing installation, replacement, repair, and inspection. Every job starts with a written price before any work begins. Call (669) 238-2101 and you’ll reach a live person, not a voicemail queue.
Why Brennan Roofing Co San Jose Is Sunnyvale’s Preferred Roofing Company
Sunnyvale homeowners don’t need another roofer who quotes low and then revises the number at the door. They need a crew that shows up, does the job to a defined standard, and stands behind it in writing. That’s the backbone of our Roofing Company operation: The Garrison Standard. Written price before any work starts. Background-checked, uniformed technicians on every job. A 365-Day Done Right Promise that covers every repair and installation for a full year, with a free return visit if anything fails. Travis Oakley leads our crews with the same expectation on every roof: if it’s not done right, we make it right. No arguments, no change orders.
We coordinate dispatch and scheduling from our San Francisco Bay Area office, so when a Sunnyvale homeowner calls, the closest available crew gets routed their way without a chain of callbacks. That matters when a winter storm rips shingles off a 1950s ranch near Serra Park or when an Eichler owner on Remington Drive discovers water staining on the ceiling at 6 p.m. on a Tuesday.
Styles & brands we work with
Roofing Contractor in Sunnyvale
A roofing contractor in Sunnyvale handles the full scope of work: tear-off, decking inspection, underlayment, flashing, shingle or membrane installation, and final cleanup. The job is not just nailing shingles down. It’s knowing where a Sunnyvale roof fails first and building backward from that. A typical full replacement on a 1,600-square-foot single-story home in Sunnyvale runs $14,000 to $22,000 depending on the material, the roof pitch, and how much decking needs to be replaced after 60 years of fog exposure. Repairs on specific problem areas run $450 to $1,800.
Wood Shake and Composition Shingle Retrofits
Homes built between 1950 and 1980 make up most of Sunnyvale’s housing stock. The original wood shake roofs in Birdland and Serra are now 60-plus years old, and many of them sit under a thick layer of moss that has wicked moisture into the underlayment for decades. Under Santa Clara County’s WUI codes, these roofs generally can’t be spot-repaired. They have to come off and go back on as Class A fire-rated assemblies. We specify fire-rated underlayment and composition shingles that meet the local code without forcing you into a material you don’t want.
On the faster end of that range, a straightforward composition shingle replacement on a ranch with a simple gable runs $14,000 to $17,500. Tile and metal run higher. When the decking underneath is rotted, which is common in fog-exposed neighborhoods, the price moves up by $2,500 to $5,000 because the plywood has to come out sheet by sheet. We write the decking line item into the quote before we start. You see it on paper first.
Commercial Roofing in Sunnyvale
Commercial roofing in Sunnyvale covers low-slope and flat-roof buildings across the city’s industrial and office corridors, from the semiconductor campuses along Kifer Road to the retail strips off El Camino Real. These roofs need different systems than residential homes: TPO, modified bitumen, and coated systems that handle ponding water and constant sun without cracking. A typical commercial flat roof replacement in Sunnyvale runs $8.50 to $14.00 per square foot for a full tear-off and new membrane. Repairs on leaks, seams, and penetration points run $850 to $3,500.
TPO and Low-Slope Systems
Sunnyvale’s warm, dry summers put a lot of UV load on commercial roofs. TPO membranes in white or light gray reflect more heat and hold up better over 20-plus years than older black EPDM systems. We install TPO and modified bitumen from GAF and other manufacturer lines, with the same written guarantee we give on residential work. The 365-Day Done Right Promise applies to every commercial job, no exceptions.
Eichler and Flat-Roof Residential Work
Eichler homes are everywhere in Sunnyvale, and their flat or nearly flat roofs are a different animal from a gable roof in Cupertino. They need membrane systems, not shingles. We replaced a 1963 Eichler roof off Remington Drive in Serra where the original tar-and-gravel membrane had baked brittle from decades of sun exposure, and the fascia had gone spongy from fog drip. Our crew tore off down to the decking, replaced the rotted plywood, laid a self-adhered ice and water shield over the entire low-slope plane, and finished with a GAF TPO membrane and new drip edge. All fasteners were hot-dip galvanized. Standard zinc-plated nails do not survive the salt air near the bay.
Trusted Brands We Service in Sunnyvale
We install and service roofing systems from GAF, Atlas, and Tamko. Each line has strengths in different situations, and we explain the trade-offs in plain English before you commit. For Sunnyvale’s WUI zones, we lean on GAF’s fire-rated underlayment and composition shingle lines that meet Class A assembly requirements without forcing you into the most expensive option. We stock common components for these brands locally for Sunnyvale customers, which keeps turnaround faster when a repair can be done without a full replacement. You’ll know exactly what product is going on your roof and why it was chosen.
Common Roofing Problems We See in Sunnyvale Homes
- Rust streaks from cheap fasteners. Within two years, standard zinc-plated nails on drip edge, ridge vent, and pipe flashing start leaving rust trails down the roof. Near the bay, we specify hot-dip galvanized or stainless hardware, and it’s a line item on the quote, not an afterthought.
- Moss creep on north-facing Birdland slopes. Coastal fog keeps these slopes damp for months. Moss grows under architectural shingles, lifts the starter strip, and exposes the underlayment to rot. The fix is often a full replacement, not a patch.
- Blown-off shingles at the first winter storm. Original 1950s nailing patterns don’t meet modern wind uplift standards for the valley-to-bay transition zone. We see roofs that survived 40 years suddenly lose shingles because the old fasteners finally let go.
- Powdered underlayment under old wood shake. In Serra and Birdland, the paper or felt underlayment from the original 1960s install has often turned to dust. The shake above it looks fine from the ground, but the waterproofing layer is gone. This is when a roof leaps from repairable to replaceable.
See the difference
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AfterPricing for Roofing Company in Sunnyvale, CA
A full roof replacement on a standard Sunnyvale single-family home runs $14,000 to $22,000. Composition shingle on a simple gable roof sits at the lower end, while tile, metal, and complex roof geometries push toward the upper end. Repairs run $450 to $1,800 for targeted work like flashing replacement, shingle patches, or vent resealing. Commercial flat roof replacement runs $8.50 to $14.00 per square foot. The biggest cost variables are decking replacement, roof pitch, access, and whether the home falls under WUI code requirements. We give you the written price before any work starts, and that number doesn’t move at the door. Call (669) 238-2101 for a free estimate.
We Also Serve Cities Near Sunnyvale
Our crews work throughout the South Bay and Peninsula, including Los Altos, San Jose, Saratoga, and Palo Alto. If you’re in a neighboring city and need a Roofing Company in Sunnyvale or the surrounding area, the same written price guarantee and 365-Day Done Right Promise apply. Call and we’ll route a crew your way.
Serving Sunnyvale, CA - Our Local Coverage Area
We’re based in the Sunnyvale 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 Sunnyvale
Santa Clara County’s Wildland-Urban Interface code requires that replacement roofs in designated zones meet Class A fire assembly standards, which means the entire roof system, not just the shingle, must be fire-rated. For most Sunnyvale homes, that means replacing old wood shake with fire-rated composition, tile, or metal, along with fire-rated underlayment. A Class A assembly won’t necessarily cost drastically more than a standard roof, but it does eliminate certain materials, like untreated wood shake, entirely. Call (669) 238-2101 and we’ll check your address against the current WUI map and tell you exactly what’s required before you spend a dollar.
Because the underlayment beneath a 60-year-old shake roof in Sunnyvale is almost always gone, especially in fog-heavy neighborhoods like Birdland and Serra. Patching missing shakes addresses the cosmetic layer while leaving the waterproofing layer compromised. Under WUI code, once a shake roof reaches that state, a full replacement to a fire-rated assembly is typically required anyway. We walk every homeowner through what’s under the shake before recommending replacement, so you’re never guessing. For an exact quote on your roof’s condition, call (669) 238-2101.
A failing Eichler roof lets water pond and seep through the membrane, which rots the plywood decking and the fascia boards beneath. By the time you see stains on the ceiling, the repair scope has grown from a membrane replacement to full decking and structural work. Waiting typically adds $2,500 to $5,000 to the job in decking replacement alone. If your Eichler is 20-plus years past its last membrane install, get it inspected before the rains return. Estimates are free at (669) 238-2101.
Yes, in most cases. Salt air from the bay corrodes standard zinc-plated roofing nails within a few seasons, especially on drip edge, ridge vent, and pipe flashing. We specify hot-dip galvanized or stainless fasteners on every Sunnyvale job by default. It’s a small cost difference upfront, typically a few hundred dollars on a full roof, and it stops the rust streaks and nail failures that plague coastal-adjacent roofs. We’ll show you the fastener spec on your written quote before any work begins.
The decking is the plywood or OSB layer beneath the shingles and underlayment. In Sunnyvale, decades of fog drip and occasional roof leaks rot this layer even when the shingles on top look acceptable. If the decking isn’t solid, new shingles can’t be properly fastened, and the roof won’t pass inspection. We don’t hide this cost; it’s on the written quote up front, typically $2,500 to $5,000 depending on how many sheets need replacement. You’ll see the exact number before we start, not after. Call (669) 238-2101 for an inspection and written estimate.
Contact Brennan Roofing Co San Jose for Your Sunnyvale Roof
If you need roof installation, replacement, repair, or inspection in Sunnyvale, call (669) 238-2101. A live person answers around the clock. Travis Oakley and the Brennan Roofing Co San Jose team will schedule your free estimate, explain your options in plain English, and hand you a written price before any work starts. The Garrison Standard applies to every job: written price, background-checked uniformed technicians, and a 365-Day Done Right Promise in writing. Don’t settle for a roofer with no standards. Call today.
Written by Travis Oakley, Owner at Brennan Roofing Co San Jose, serving Sunnyvale under the Garrison Standard.