Full Roof Replacement in San Jose, CA

Full Roof Replacement in San Jose, CA

A full roof replacement in San Jose typically costs between $12,000 and $28,000 for a standard single-family home, depending on square footage, roofing material, and the condition of the underlying decking. Most tear-off and replacement jobs take 2 to 5 days once permits are approved. At Brennan Roofing Co San Jose, we put the price in writing before any work starts, so you know the full number before a single shingle comes off your roof. Call (669) 238-2101 for a free estimate.

Full roof replacement means removing the existing roof down to the decking, inspecting what’s underneath, repairing or replacing damaged wood, and installing a new roofing system from the deck up. That includes underlayment, leak barriers, drip edge, flashing, and the outer roofing material itself. It’s a bigger job than a repair or a partial reroof, and it’s the right call when your roof is too far gone for patching to make sense. This page covers what full replacement involves, when it’s the right move, what it costs in San Jose, and how we run the job. If you’re still deciding between repair and replacement, our Roof Replacement & Installation page walks through the full range of options.

Travis Oakley leads the crew at Brennan Roofing Co San Jose. Every project runs under The Garrison Standard: a written price before any work starts, background-checked uniformed technicians on site, and a written guarantee that covers the work for one full year. It’s the same standard on every job, no matter the size of the roof.

When You Need Full Roof Replacement

Not every roof problem calls for a full replacement. Here are the situations where pulling everything off and starting fresh is the smarter financial move:

• The roof is 20 to 25 years old and showing age. Most asphalt shingle roofs in the San Jose climate last 20 to 30 years. If yours is in that window and you’re seeing granule loss in the gutters or curling at the edges, replacement is usually cheaper than chasing repairs year after year.
• Leaks are showing up in multiple places. One leak around a pipe boot is a repair. Water stains on ceilings in three different rooms suggest the roof system as a whole is failing. At that point, spot repairs just move the problem around.
• The decking is soft or spongy when you walk the roof. Rotted decking means water has been getting under the shingles for a while. You can patch the decking and reroof, or you can keep patching indefinitely. Full replacement lets us inspect the entire deck and rebuild what’s needed.
• Shingles are cracked, curled, or missing across large sections. On a hot San Jose summer day, a roof surface can hit 140 degrees. Years of that heat cycling breaks down asphalt. If whole slopes look worn, not just a few spots, the roof is done.
• You’re seeing daylight in the attic. If light is coming through the roof boards, water can too. That’s a structural signal, not a cosmetic one.
• A roof inspection flagged extensive flashing failure. Flashing is the metal that seals the joints where the roof meets chimneys, walls, and valleys. When flashing fails in several places at once, the leak points multiply quickly.

If you’re not sure which category you’re in, call us. We inspect, tell you plainly what we found, and give you the honest answer, even when the honest answer is that a repair will hold for a few more years.

Our Full Roof Replacement Process

We follow the same sequence on every full replacement in San Jose. The homeowner always knows what’s happening next, and the price doesn’t shift after we start.

1. Inspection and written estimate. Travis or a lead technician walks the roof, checks the attic, and evaluates the decking, flashing, and ventilation. You get a written price for the full scope of work before any work starts. The number on that paper is the number you pay unless you ask for a change in scope.
2. Permit and material delivery. We pull permits through the City of San Jose and order materials from manufacturer lines we trust. Depending on what you choose, that may include roofing from GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, or Boral. We explain the differences in lifespan, weight, and price so you pick with confidence, not guesswork.
3. Tear-off and deck inspection. The crew removes all existing roofing down to the deck. This is when we find what’s underneath. Rotted or weakened plywood gets replaced. Open deck means we can finally see everything.
4. Underlayment, leak barrier, and drip edge. We install the water-shedding layers first. That includes synthetic underlayment across the deck, leak barrier in valleys and around penetrations, and new drip edge at the eaves and rakes to carry water away from the fascia.
5. Flashing and roof material installation. New flashing at every joint, valley, and penetration goes in before the outer roofing material. Then the shingles, tile, or metal goes on. Every row is aligned, nailed per the manufacturer’s spec, and checked as the crew works.
6. Cleanup and final walk-through. We run a magnetic sweeper over the yard and driveway to catch stray nails, haul off all debris, and walk the roof with you before we leave. The paperwork includes your written guarantee, in force for one full year.

Throughout the job, the same background-checked, uniformed technicians who started your roof are the ones who finish it. Nobody new shows up unannounced.

Full Roof Replacement Pricing in San Jose

Here’s what we see across San Jose for full roof replacement as of 2025 and early 2026. These are ballpark ranges for a typical single-family home, not quotes. Your specific price depends on roof size, pitch, accessibility, material choice, and decking condition. We give the exact number in writing after the inspection, free of charge.

Scope	Typical Range in San Jose
Full tear-off + asphalt shingle replacement (1,200 – 1,800 sq ft roof)	$12,000 – $18,000
Full tear-off + asphalt shingle replacement (1,800 – 2,600 sq ft roof)	$18,000 – $26,000
Full tear-off + standing seam metal roof	$28,000 – $48,000
Full tear-off + concrete or clay tile roof	$30,000 – $55,000
Decking replacement (per 4×8 sheet, if rot found during tear-off)	$90 – $140 per sheet
Skylight replacement (if existing skylight is at end of life)	$1,200 – $2,800 per unit

What moves the number:

• Roof pitch. A steep roof in the hills around Alum Rock or the east foothills takes longer and costs more in labor than a low-slope roof in Willow Glen or Blossom Valley.
• Decking condition. Older San Jose homes, especially those built before the 1980s, often have plywood that’s absorbed decades of heat and occasional moisture. If we find rot during tear-off, the cost per sheet above applies. We only replace what’s actually bad, and we show you the rot before we touch it.
• Material choice. Asphalt shingles from Owens Corning or CertainTeed are the workhorse of San Jose roofs. Tile from Boral or standing seam metal costs more up front, but lasts longer and handles the sun differently.
• Access and landscaping. A steep driveway in the Evergreen foothills, tight property lines in Naglee Park, or fragile landscaping under the eaves all add setup time. It’s real labor, and we price it honestly.

The estimate is free. The price is in writing before we start. It doesn’t move at the door because there’s no door to move it at. Call (669) 238-2101 and we’ll schedule the inspection.

Why San Jose Homeowners Choose Brennan Roofing

We know you’ve got options in San Jose. There are roofers on every bidding site, and a few of them are gone by the time the phone rings twice. Brennan Roofing Co San Jose is part of the Garrison Partners family, founded in 2000. We’re independently owned and operated, and we operate under a defined standard called The Garrison Code. Here’s what that means in practice:

• Written price before any work starts. Always. No exceptions. The number on the estimate is the number you approve, and it doesn’t change unless you change the scope.
• 365-Day Done Right Promise. Every full roof replacement is guaranteed in writing for one full year. If something fails during that year, we come back and fix it at no charge.
• Background-checked, uniformed technicians. You know who is on your property. The crew is vetted, badged, and in uniform every day.
• A live person answers the phone, 24/7. No voicemail, no automated menu, no callback queue. A real human answers when you call (669) 238-2101.
• Materials from manufacturers we trust. We install roofing from lines including GAF, CertainTeed, and Atlas, and we tell you plainly what each material costs and how long it’s built to last.

None of that is marketing language. It’s the way the job runs, every time, because the Garrison Standard is the same on a small repair in Santa Teresa as it is on a full replacement in Almaden Valley.

Full Roof Replacement FAQs

How much does a full roof replacement cost in San Jose?

A full roof replacement in San Jose usually falls between $12,000 and $28,000 for a standard asphalt shingle roof on a single-family home. Tile and metal roofs run higher, typically $28,000 to $55,000 depending on size and pitch. We give an exact written estimate after a free inspection so you don’t have to guess. Call (669) 238-2101 to schedule yours.

Is it cheaper to repair or replace a roof?

Repeated repairs are cheaper in the short run and more expensive over time. If your roof is under 15 years old with a single leak, repair makes sense. If it’s past 20 years old, losing granules, and producing leaks in multiple spots, replacement costs less per year than patching indefinitely. We’ll inspect and tell you which side of that line your roof is on, with numbers to back it up.

How long does a full roof replacement take in San Jose?

Most full replacements take 2 to 5 days once the permit clears and materials are on site. Simple one-story homes with basic gable roofs in neighborhoods like Willow Glen can go faster. Multi-level homes with steep pitches in the east foothills take longer. We give you a schedule in writing with the estimate, and we hit it or we call you with a reason before the window closes.

Do you offer a warranty on full roof replacement?

Yes. Every full roof replacement from Brennan Roofing Co San Jose is backed by the 365-Day Done Right Promise, in writing, for one full year. If any part of the installation fails during that year, we return and fix it at no charge. The manufacturer’s warranty on the roofing material itself runs separately and varies by product line, typically 25 years to lifetime depending on the shingle.

What roofing materials do you install in San Jose?

We install asphalt shingles, standing seam metal, and concrete or clay tile, sourced from manufacturer lines including GAF, CertainTeed, Atlas, and Boral. Each material handles San Jose’s dry summers and wet winters differently, and each has a different price point. During the estimate, we walk you through the real differences in lifespan, weight, and cost so you make an informed decision, not a default one.

Do I need a permit for a roof replacement in San Jose?

Yes. The City of San Jose requires a building permit for roof replacement. We pull the permit as part of the job, schedule any required inspections, and close everything out properly. It’s included in the written estimate, not a surprise line item.

Can you replace my roof if I have solar panels?

Yes. If you have solar on your roof, the panels need to come off before tear-off and go back on after the new roof is done. We coordinate with a solar contractor for the removal and reinstallation. We’ll tell you exactly how it works, what it adds to the schedule, and what it costs before we start. If you need a Roof Replacement & Installation in San Jose job with solar, we handle the sequencing.

Is it cheaper to replace a roof in the off-season?

Not meaningfully in San Jose. The local climate allows roofing year-round, and material prices don’t swing much by season here. The bigger variable is lead time. Scheduling during spring and early summer fills fastest. Booking during fall and winter often means we can start sooner. The price stays the same because we’re not running seasonal discounts to fill a calendar.

Key Takeaways

• Full roof replacement in San Jose typically runs $12,000 to $28,000 for asphalt shingles on a standard home.
• The job takes 2 to 5 days once permits are approved, and we handle the permit process.
• We write the price before any work starts, and it doesn’t move unless you change the scope.
• Every replacement is backed by the 365-Day Done Right Promise: in writing, for one full year, free return if it fails.
• The estimate is free. Call (669) 238-2101 to schedule an inspection with Brennan Roofing Co San Jose.

What to Expect When You Call

You’ll get a live person on the phone. Not a voicemail prompt, not a call center menu. We’ll ask about your roof, set up a time for an inspection, and show up in uniform inside the window we promised. Travis Oakley or one of his lead technicians walks the roof, looks at the attic, and writes up a price you can hold in your hand before any work begins. If full replacement is the right call, you’ll know exactly what it costs and how long it takes. If a repair is the better move, we’ll say that instead. The Garrison Code means we don’t sell you work you don’t need.

Call Brennan Roofing Co San Jose at (669) 238-2101 for a free roof replacement estimate. We serve all of San Jose and the surrounding area, and we answer the phone day or night.

Written by Travis Oakley, Owner at Brennan Roofing Co San Jose, serving San Jose.