New Construction in San Jose, CA

New Construction in San Jose, CA

New construction roofing in San Jose means installing a roof on a newly built home, an addition, or an accessory dwelling unit (ADU) before the structure is occupied. For homeowners and general contractors in San Jose, the job requires coordination with framing, city inspections, and material lead times that a re-roof doesn’t. Brennan Roofing Co San Jose handles new construction roofing from the deck up, with a written price before any work starts and a full-year guarantee on the finished roof. If you’re planning a build or a major addition, call us at (669) 238-2101 and we’ll walk you through the process in plain language.

This page covers what new construction roofing involves, when it’s the right call, how our process works, and what you can expect to pay in San Jose. For a broader look at roof replacement on existing homes, see our Roof Replacement & Installation in San Jose page. And if you’re just getting oriented with who we are, start at our home page.

Key Takeaways

• New construction roofing in San Jose typically runs $8,500 to $28,000 depending on roof size, pitch, and material.
• We coordinate directly with your general contractor and the City of San Jose building inspection schedule.
• Every new construction roof from Brennan Roofing Co San Jose comes with a written price up front and the 365-Day Done Right Promise in writing.
• We install materials from GAF, CertainTeed, Owens Corning, Atlas, and other major manufacturers.

When You Need New Construction

New construction roofing is a different animal than roof replacement. On a re-roof, you’re tearing off old material and working around a lived-in house. On new construction, you’re installing on fresh decking, usually before siding, gutters, or interior finishes go in. The schedule is tighter because the roof has to pass inspection before the trades behind you can do their work. Here’s when San Jose homeowners and builders call us:

• You’re building a new home – Whether it’s a custom build in Willow Glen or a spec house in Evergreen, the roof has to go on fast and pass inspection the first time.
• You’re adding a second story or a room addition – Tying a new roofline into an existing roof is detail work. Flashing, slope transitions, and valley construction have to be right or the whole structure leaks at the seam.
• You’re building an ADU – San Jose has one of the most active ADU markets in the state. A detached unit or garage conversion typically needs its own roof system, and the City of San Jose requires a separate inspection for it.
• Your general contractor needs a roofing sub who shows up when scheduled – A roof that goes on late stalls framing inspection, insulation, drywall, and every trade after it. We show up inside the window we give you.
• You’re replacing a roof after a major structural remodel – If you’ve opened up walls, added dormers, or re-framed the roofline, the old roof comes off and a new one goes on as part of the same permit.
• You bought a property with an unfinished build – Abandoned or half-finished construction is not rare in San Jose’s hotter real estate cycles. We’ll assess what’s been done, what’s salvageable, and what needs to come off.

Our New Construction Process

Every new construction roofing job in San Jose follows the same sequence. Here’s what you can expect when you work with Brennan Roofing Co San Jose.

1. Site walk and roof plan review. We meet you or your contractor at the site, go over the architectural drawings, and take measurements. If there’s no plan set, we’ll measure the framed roof directly and flag anything that looks off before materials get ordered.
2. Written price, before any work starts. You get a line-item written price that includes decking, underlayment, flashing, drip edge, vents, and the roofing material itself. That number does not move at the door. We don’t start the job until you have it on paper.
3. Material selection and order. We work through GAF, CertainTeed, Owens Corning, Atlas, and Tamko product lines with you, explaining the practical differences between architectural shingles, tile profiles, and standing seam options. Once you pick, we order. Lead times on tile and standing seam in San Jose can run two to six weeks, and we plan around that so your framing inspection doesn’t stall out waiting.
4. Installation and mid-job communication. Our technicians are background-checked and arrive in uniform. You know exactly who’s on the property. We install the full system: underlayment, drip edge, flashing at penetrations and transitions, and the finished roof surface. If your general contractor is managing the schedule, we update them after each workday.
5. Final inspection coordination. We’re familiar with the City of San Jose Building Division’s roof inspection requirements, including nailing pattern documentation and underlayment class compliance under the current California Building Code. We leave the job site clean and we stay available if the inspector wants documentation.
6. 365-Day Done Right Promise. Before we leave, you get our guarantee in writing for one full year. If a repair fails or a workmanship problem shows up within that year, we come back and make it right at no charge.

Throughout the process, you’re working with a roofing company that operates under The Garrison Standard. That name matters because it’s not a slogan. It’s a written commitment to a specific way of doing business: show up inside the window, put the price on paper before any work starts, and stand behind the finished job in writing. Travis Oakley, who leads Brennan Roofing Co San Jose, is accountable to that standard on every project, new construction included.

New Construction Pricing in San Jose

New construction roofing in San Jose typically runs between $8,500 and $28,000 for a standard single-family home or ADU. The range is wide because roof size, pitch, and material choice swing the number hard. Here’s a practical breakdown of what we see across San Jose’s neighborhoods, from the flat lots of Almaden Valley to the hillside builds in the East Foothills.

Roof Type / Material	Typical Range (San Jose)	Notes
Architectural asphalt shingle, 1,500-2,200 sq ft roof	$8,500 – $14,000	Most common choice for new construction. 30-year material options available.
Architectural shingle, steep pitch or complex roofline	$12,000 – $19,000	Additional labor for pitch, valleys, dormers. Expect the high end in hillside areas.
Concrete or clay tile, 1,500-2,200 sq ft roof	$18,000 – $28,000	Heavier material, longer lead time, additional structural consideration in some zip codes.
Standing seam metal	$22,000 – $35,000+	Higher material cost, excellent for ADU roofs and modern designs.
ADU only (400-700 sq ft roof)	$4,500 – $9,000	Smaller scale but still a full permit and inspection.

What moves the number on new construction in San Jose:

• Roof pitch. Anything steeper than 6:12 means more safety equipment, slower labor, and a higher price. Hillside lots in Alum Rock and the East Foothills often have steeper pitches.
• Material choice. A GAF architectural shingle roof costs less than a Boral concrete tile roof. Both are good products. The right one depends on your structure, your HOA if you have one, and your budget.
• Decking condition. On true new construction, decking is usually new OSB or plywood installed by the framer. We inspect it before covering it. If the framer used substandard wood or left gaps that don’t meet code, that’s a change order conversation, not a door-to-door price hike.
• Underlayment class. California building code requires specific underlayment ratings depending on the roof covering and the fire hazard severity zone of your parcel. Some parts of San Jose’s wildland-urban interface require Class A assemblies, which add material cost.
• Permit and inspection coordination. The City of San Jose building permit for the roof is usually pulled as part of the overall construction permit. We work within that process and don’t add a “coordination fee” like some outfits do.

We don’t do estimates over a quick phone call without seeing the roof or the plans. But we’ll give you an honest ballpark on a first call. Then we’ll put the exact number in writing before any work starts. Call (669) 238-2101 for a free estimate on your new construction project in San Jose.

Why New Construction Roofing Requires a Different Standard

New construction roofing has a tighter job sequence than re-roofing, and the mistakes compound faster. If the decking gets covered before a nail pattern inspection, you’re tearing material off and eating the cost. If underlayment isn’t rated correctly for the roof assembly, the inspector fails it and the entire schedule slips. If flashing isn’t cut and folded precisely at a wall transition, water finds its way in and you don’t discover it until the drywall is up and the paint is done.

This is where The Garrison Standard earns its keep. The discipline we operate under isn’t about being polite; it’s about doing the job in a way that passes inspection and stays watertight. Background-checked, uniformed technicians show up inside the promised window. The price on paper doesn’t change at the door. And the finished roof is guaranteed in writing for a full year. That accountability matters most on new construction, where so many hands touch the project that it’s easy for a roofer to blame the framer, the framer to blame the architect, and the homeowner to get stuck in the middle. We don’t play that game.

We also carry real familiarity with the major manufacturer lines. When you’re choosing between an Atlas shingle and a Tamko shingle, we can explain the practical difference in the context of your specific roof: slope, sun exposure, and the San Jose microclimate. We’ll show you the actual product samples and give you the written spec sheet. You choose based on facts, not a sales pitch.

What We Look For on Every New Construction Roof

Before we install a single shingle or tile, we run through a checklist that catches problems early. This matters because new construction doesn’t always mean “done right.” We’ve seen framers leave decking with gaps over a quarter inch, which violates the manufacturer’s installation requirements. We’ve seen HVAC penetrations cut through the roof with no curb or flashing detail in the plans. We’ve seen roof trusses set slightly out of tolerance, which creates a visible hump in the finished roof plane.

• Decking flatness and fastener spacing. We check that the decking meets the nailing pattern required for the material and seismic zone.
• Valley construction. Closed-cut valleys, open valleys, or woven valleys each need a specific underlayment and flashing detail. We verify the plan matches the roofline.
• Penetration locations. Pipes, vents, skylights, and hoods. Each one needs a flashing boot or curb detail. We locate every penetration before the underlayment goes down.
• Drip edge at eaves and rakes. The code requirement gets missed on plenty of new construction. We install drip edge at every eave and rake edge without exception.
• Ventilation plan. San Jose attics trap heat, especially in the summer. We make sure the intake and exhaust ventilation is balanced before the roof goes on, because retrofitting it after construction is expensive.

If we find a problem, we’ll tell you or your contractor in plain English. If the fix is simple and within our trade, we’ll include it in the written price. If it requires the framer to come back out, we’ll flag it before we cover the decking. We don’t charge for that conversation. We consider it part of doing the job correctly.

New Construction Roofing Materials We Install

We install materials from leading manufacturer lines including GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. Real options, explained plainly. Here’s how that plays out on new construction jobs in San Jose.

For standard single-family homes, architectural asphalt shingles from GAF or CertainTeed are the most common choice. They carry 30-year to 50-year manufacturer warranties depending on the line, and they install efficiently, which keeps labor costs realistic. For homes with a Spanish or Mediterranean style, which is common in neighborhoods like Cambrian and Willow Glen, a Boral concrete tile profile looks right and carries serious longevity. For ADUs and modern designs, standing seam metal from a manufacturer like Atlas is a clean look with strong performance in San Jose’s dry summers and wet winters.

The manufacturer warranty on the materials is separate from our 365-Day Done Right Promise. The manufacturer covers material defects. We cover workmanship for one full year, in writing. If something fails inside that year because we didn’t install it correctly, we come back and make it right at no charge. That’s the entire guarantee, stated plainly, and it applies to every new construction roof we install in San Jose.

San Jose Permitting and Inspection for New Construction Roofs

New construction roofing in San Jose falls under the City of San Jose Building Division’s permit process. The roof is one component of the overall construction permit, and the inspector will check it at the framing stage (before decking is covered) and at final inspection. We’ll be there for both if your contractor wants us on site.

The key things the inspector looks for: the underlayment class matches the roof covering and the fire hazard severity zone, the nailing pattern meets the manufacturer’s installation instructions, the flashing details comply with the current California Building Code, and the roof assembly matches the approved plans. If there’s a discrepancy between the plan and what the framer built, we’ll catch it during our pre-installation check and get it addressed before the inspector arrives.

We’ve done new construction roofing in San Jose’s flatlands, hillsides, and everything in between. The city’s inspection standards are consistent across all of them. Our process is too.

FAQs – New Construction

How much does new construction roofing cost in San Jose?

New construction roofing in San Jose typically costs between $8,500 and $28,000 for a standard single-family home, depending on roof size, pitch, and material. Smaller ADU roofs run $4,500 to $9,000. Labor, material, underlayment, flashing, and drip edge are all included in the written price we give you before any work starts. Call (669) 238-2101 for a free estimate on your specific project.

Can you start new construction roofing immediately?

We can typically start within one to three weeks of your written approval, depending on material lead times and our current San Jose schedule. Tile and standing seam roofs take longer because of manufacturer production schedules. Call us at (669) 238-2101 and we’ll give you a realistic start date, not a vague “soon.”

Do you work with general contractors on new construction?

Yes. We regularly install new construction roofing as a subcontractor for general contractors building homes and ADUs across San Jose. We show up inside the promised window, keep the job site clean, and coordinate directly with the GC on inspection scheduling. The written price we give you is the price we hold, which makes budgeting easier for the contractor and the homeowner.

Is new construction roofing guaranteed?

Yes. Every new construction roof we install comes with the 365-Day Done Right Promise: a written guarantee for one full year, with a free return visit at no charge if the installation fails within that period. The manufacturer’s warranty on the material runs separately and covers material defects according to the manufacturer’s terms.

What if the framer’s work has problems before the roof goes on?

We inspect the decking and framing before we install any roofing material. If we find something out of tolerance, like excessive decking gaps or improper truss alignment, we’ll flag it to you or your contractor before we cover it. We don’t install over a problem just to stay on schedule. That’s how homes end up with humped rooflines and leaks after closing.

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