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
Trusted Roofing Company for San Francisco Homeowners
Finding a roofing company in San Francisco that shows up when they say they will, writes the price down before work begins, and stands behind the finished job is harder than it should be. Brennan Roofing Co San Francisco operates under The Garrison Standard, which means every job gets a written price up front, every technician is background-checked and uniformed, and every repair or installation carries a written one-year guarantee. If it’s not done right, we make it right at no charge. Call (831) 318-8819 and you’ll reach a live person, not a voicemail queue.
Roofing Contractor
Roofing Contractor work in San Francisco covers the full scope: tear-off and replacement, targeted repair, and preventive inspection. Brennan Roofing Co San Francisco has operated under The Garrison Standard since 2000, and every project starts with a written price in hand before a single shingle comes off. Repairs in the city typically run $450 to $1,200 depending on what’s leaking and where. A full tear-off and reroof on a standard San Francisco home runs $14,000 to $28,000, and we’ll explain every line item plainly.
Licensed, Insured, and Accountable
Every technician who steps onto your roof has passed a background check and arrives in uniform. You know who’s on your property. The 365-Day Done Right Promise is a written guarantee that covers every repair and installation for one full year.
Written Price Before Work Starts
The price goes on paper before any work begins, and it does not move at the door. That’s The Garrison Code, and it applies to every job we take in San Francisco.
Styles & brands we work with
Commercial Roofing
Commercial Roofing in San Francisco means flat or low-slope systems on storefronts, warehouses, office buildings, and multi-unit properties. Brennan Roofing Co San Francisco handles membrane systems, modified bitumen, coatings, and metal retrofits for property owners who need a roof that keeps tenants dry and insurance inspectors satisfied. Commercial roof coating projects in San Francisco typically fall between $3,500 and $9,000 depending on square footage and substrate condition. Full commercial replacement costs run $8 to $14 per square foot.
Flat and Low-Slope Systems
Fog, salt air, and UV exposure punish San Francisco rooftops year-round. We inspect seams, flashing, and drainage first, then write a scope that fixes what’s actually failing, not what’s easy to sell.
Minimizing Tenant Disruption
We schedule work in phases when a building stays occupied. That means clear start times, clean staging areas, and a site that’s picked up at the end of every day. The written guarantee applies to commercial work the same as residential.
Metal Roof Installation
Metal Roof Installation is a long-term roofing option that stands up to San Francisco’s wind and salt air better than most materials. Brennan Roofing Co San Francisco installs standing seam and exposed fastener metal systems, and we walk every homeowner through material gauge, coating type, and expected lifespan before a quote is written. Metal roof installation in San Francisco typically ranges from $18,000 to $40,000 depending on roof complexity, panel profile, and whether old roofing material must be removed first.
Standing Seam vs. Exposed Fastener
Standing seam panels hide the fasteners and move with thermal expansion; exposed fastener systems cost less upfront but need fastener maintenance over time. We’ll show you both options and the real cost difference for your roof.
Underlayment and Ventilation Matter
A metal roof only performs as well as what’s underneath it. We spec high-temperature underlayment and verify attic ventilation so condensation doesn’t become a hidden problem behind the panels.
Residential Roofing
Residential Roofing is the core of what we do in San Francisco: asphalt shingle roofs, tile, and metal on single-family homes across the city’s hillside neighborhoods. Brennan Roofing Co San Francisco installs materials from GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral, and we explain the trade-offs between each so you choose with confidence. Asphalt shingle reroofing on a typical San Francisco home runs $14,000 to $26,000. Tile roofs run higher, from $25,000 to $45,000, reflecting both material weight and the extra structural verification involved.
Hillside Access and Safety
Many San Francisco roofs sit on steep grades that make access difficult. We stage materials carefully and secure them against wind, and every crew member is trained on fall protection. Steep roof work is genuinely dangerous, and it’s not a place for shortcuts or second-guessing.
Materials Sourced From Manufacturer Lines
We install GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral products. Each has a different warranty structure and lifespandifferent aesthetic. We lay out the actual options for your roofline and budget, then write a price that includes everything.
Roof Maintenance
Roof Maintenance is scheduled, preventive work that extends roof life and catches small failures before they become ceiling stains. In San Francisco’s damp, fog-heavy climate, moss and debris accumulation is a real problem, especially on north-facing slopes. Brennan Roofing Co San Francisco offers maintenance plans that include gutter cleaning, flashing inspection, boot replacement, and a written condition report after each visit. Annual roof maintenance in San Francisco generally costs $350 to $800; larger or steeper roofs fall at the higher end.
What We Check Every Visit
Flashing at chimneys and skylights, pipe boots, valley debris, ridge caps, and attic-side signs of moisture all go on the checklist. You get a written report with photos, so you can see what we saw.
Neighborhood Effects on Wear
Roofs in the Sunset and Richmond face constant salt-laden fog. Roofs under the eucalyptus canopy in neighborhoods like Glen Park and Noe Valley collect acidic leaf litter. Our maintenance schedules account for where your house actually sits.
Roof Coating
Roof Coating is a fluid-applied membrane that seals and protects existing roofing systems, most commonly on flat or low-slope commercial buildings but also on some residential structures. It extends the life of an aging roof at a fraction of replacement cost. Brennan Roofing Co San Francisco applies silicone and acrylic coating systems from manufacturers including GAF, and we prep every surface before the coating goes down because adhesion is everything. Roof coating in San Francisco typically costs $3,500 to $9,000 depending on roof size and condition.
Elastomeric Coatings Explained
Silicone coatings resist ponding water and UV breakdown, which makes them useful on flat commercial roofs that hold water after rain. Acrylic coatings cost less but don’t tolerate standing water. We’ll tell you which one fits your roof, not which one fits our margin.
When Coating Is Not the Answer
If the underlying roof has saturated insulation or failed seams, coating just hides a bigger problem. We inspect first. If coating won’t solve it, we’ll say so and write a repair plan instead.
Free Roof Estimate
A Free Roof Estimate from Brennan Roofing Co San Francisco means a technician comes out, inspects the roof, and hands you a written price on the spot. No ballpark, no “we’ll send something in the mail.” The number is specific, itemized, and guaranteed not to move at the door. Estimate visits in San Francisco are free, always. Call (831) 318-8819 and a live person will schedule it.
What You Get On the Estimate
Material type and quantity, labor, tear-off and disposal if applicable, flashing replacement scope, underlayment type, and the warranty period. The estimate is written, so there’s no confusion about what’s included.
No Pressure, No Follow-Up Call Blast
We don’t send sales people to sit in your living room for two hours. The estimate is what it says: a written price for the work described. You decide from there.
Brands We Service
We install GAF roofing systems, including their Timberline HDZ shingle lines and TPO membranes for low-slope applications. For San Francisco homes, we recommend GAF’s wind-rated shingles for hillside and coastal exposure, and we can explain the difference between their standard warranty and the Golden Pledge coverage.
For CertainTeed, we install their Landmark shingle series and their Flintlastic SA self-adhered low-slope systems. CertainTeed’s self-adhered membranes are useful in San Francisco because they seal around fasteners without torches, which matters on occupied buildings and near vent pipes. Whether your roof has GAF, CertainTeed, Tamko, Boral, or any other system, we can inspect, repair, or replace it. We also offer roof repair and roof inspection services for every brand we install.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Water stains on ceilings or walls. A stain means water has already breached the roof and traveled through the assembly. The visible mark may be small while the decking above it is already rotting.
- Granules in the gutters. Asphalt shingles shed granules as they age, and finding a sand-like buildup in your downspouts means the shingles are losing their protective surface and nearing failure.
- Lifted, cracked, or missing shingles. Any breach in the shingle layer lets water reach the underlayment and decking. In San Francisco’s heavy winter rains, one missing shingle can allow enough water to damage ceiling drywall within a single season.
- Daylight visible through roof boards in the attic. If you can see light from inside the attic, water can get in too. This is a direct sign your roof needs repair before the next storm arrives.
- Moss or algae growing on shingles. Moss holds moisture against the roofing material and lifts shingle edges, especially on shaded north-facing slopes common across San Francisco. Left alone, it shortens roof life by years.
Our Process, Step by Step
- 1
Call and schedule. A live person answers at (831) 318-8819. We schedule the estimate window you want, and the technician shows up inside that window. No all-day waiting.
- 2
On-site inspection. The technician walks the roof and the attic, checks flashing, drains, and decking, takes photos, and documents what’s actually wrong. You get to see the evidence, not just hear a summary.
- 3
Written price. Before any work starts, you receive a line-item price on paper. Materials, labor, tear-off, disposal, permit scope if required. That number does not change at the door, ever.
- 4
Scheduled work with a clean site. Crews arrive in uniform, stage materials carefully, protect landscaping, and clean up at the end of every day. Nails and debris don’t get left in your yard.
- 5
Final walkthrough and written guarantee. You walk the completed work with the crew lead, ask questions, and sign off. Then you get the 365-Day Done Right Promise in writing. If anything fails within a year, we return at no charge.
How Much Does Roofing Company Cost in San Francisco?
A standard asphalt shingle reroof on a San Francisco home typically runs $14,000 to $28,000. That range reflects roof size, pitch, number of layers being removed, and whether the decking needs repair. Simple repairs like replacing a cracked pipe boot or a few lifted shingles run $450 to $900. Leak repairs involving flashing around chimneys or skylights fall between $800 and $1,400. Metal roof installation runs $18,000 to $40,000, and tile roofs start around $25,000. Commercial roof coating projects run $3,500 to $9,000, while full commercial replacement runs $8 to $14 per square foot.
The factors that move a San Francisco roof price most are access, decking condition, and material choice. A steep roof on a tight lot requires more labor hours. Decking that’s rotted from years of leaks must be replaced and sheathed before new shingles go on. Architectural shingles cost more than three-tab but last longer and hold up better to wind. The free estimate includes all of this broken out line by line, so you can see exactly what you’re paying for and why. To avoid overpaying, get a written quote that lists material brands, warranty terms, and the scope of decking replacement. And check whether the quote includes permit costs. It should, and ours does.
Our Service Area Near San Francisco
Brennan Roofing Co San Francisco serves the city and surrounding Bay Area communities including Hayward and Berkeley, plus Daly City, San Leandro, Walnut Creek, Castro Valley, Novato, San Bruno, Martinez, Foster City, and Burlingame. Travel from our local dispatch keeps response times predictable across the East Bay and down the Peninsula. You can learn more about our work in the area by visiting our home page or the Roofing Company in San Francisco page. We also serve Roofing Company in Hayward and Roofing Company in Berkeley with the same Garrison Standard, written pricing, and one-year written guarantee.
Serving San Francisco, CA - Our Local Coverage Area
We’re based in the San Francisco area and know this community well, including nearby areas served by our Daly City roofing company. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Roofing Company in San Francisco
A roofing company is a licensed contracting business that installs, repairs, inspects, and maintains roof systems on homes and commercial buildings. Brennan Roofing Co San Francisco handles residential and commercial work, from shingle tear-offs to flat roof coatings to metal installations. Every job starts with a written price before any work begins.
Most asphalt shingle tear-off and replacement jobs on single-family San Francisco homes take two to five working days, depending on roof size, pitch, and decking condition. Metal and tile installations take longer. We’ll give you a written timeline with your estimate, and we don’t start work until you’ve seen that number on paper. Call (831) 318-8819 to schedule a free estimate and get your timeline.
Repairs in San Francisco generally fall between $450 and $1,400 depending on what’s failing. A simple shingle replacement or boot repair sits at the low end; flashing work around chimneys and skylights runs higher. The written estimate is free and itemized, so you’ll know the exact cost before you approve anything.
Yes, we install and repair GAF roofing systems including Timberline HDZ shingles and TPO commercial membranes. We can explain the warranty differences between standard and Golden Pledge coverage, and we install to manufacturer spec so the warranty stays valid. Whether you have GAF, CertainTeed, Tamko, or Boral, we can help.
When a roof is actively leaking into a home, call us at (831) 318-8819. A live person answers around the clock, not a voicemail system. We’ll talk through the situation, help you contain the damage if possible, and schedule a technician to get there as soon as possible. The repair gets the same written guarantee as every other job we do.
The 365-Day Done Right Promise is a written one-year guarantee on every repair and installation. If the work fails within that year, we return and make it right at no charge. There’s no fine print and no claim process runaround. It’s in writing, and it applies to every job we complete.
Move vehicles out of the driveway, clear items from attic space below the roof if possible, and let us know about any fragile landscaping under eaves. We protect landscaping with tarps and clean the site every day. The crew lead will walk the project with you at the start and the end, so you know what’s happening at every stage.
Schedule Your Roofing Company Service in San Francisco Today
If your roof is leaking, aging, or just needs an inspection before the next winter rain, call Brennan Roofing Co San Francisco at (831) 318-8819. You’ll get a live person, a free estimate, and written pricing before any work starts. The Garrison Standard applies to every job: background-checked technicians, uniformed crews, and a one-year written guarantee. Call today and get the number on paper.
Written by Travis Oakley, Owner at Brennan Roofing Co San Francisco, serving San Francisco since 2000.