San Jose · Santa Clara County
Commercial Roofing in San Jose: Repair, Re-Roofing and Inspections
Commercial and HOA roofs across San Jose, from North San Jose R&D buildings to condo associations.
- Free roof condition report
- Good, better and best bid options
- Certificate of insurance within 24 hours of request
San Jose's commercial building stock, and the roofs on it
R&D and flex buildings. Kidder Mathews counts 38.3 million square feet of R&D space in San Jose (Q3 2026), the largest submarket in Silicon Valley, with North San Jose a focus of R&D leasing. Most of these buildings have low-slope roofs carrying rooftop HVAC.
Multifamily and condos. The California Department of Finance counts 100,820 housing units in buildings of five or more units and 34,800 single-attached units in San Jose (January 1, 2026). That's apartments, condos and townhome associations, many with low-slope sections, garage podiums or carports.
Tilt-ups. Concrete tilt-up buildings from the 1960s through the 1980s, with low-slope roofs, are typical of the Santa Clara Valley's industrial areas.
Systems typically found here
TPO on re-roofed tilt-ups, modified bitumen and built-up roofs on older buildings, coatings on sound older roofs, and sheet metal at parapets and edges.
Illustrative image, not a completed project.
San Jose weather and what it does to flat roofs
About 82% of San Jose's annual rain falls from November through March, according to the National Weather Service. NOAA's 1991–2020 normals for the San Jose station put the year at 13.48 inches, with January the wettest month (2.80 inches), followed by February (2.69 inches).
The long dry season works on roofs too. Hot, sunny summers age membranes and coatings through UV and heat, which is part of why cool-roof reflectance matters inland.
The practical result: inspect and clear drains in September and October, and expect a wave of leak calls with the first storms. Book a free roof condition report before the rains, and see commercial roof repair and leak response if water is already coming in.
Permits for commercial roofing in San Jose
- Repairs: a building permit is required when 25% or more of the roof is replaced or repaired. Smaller repairs that don't involve framing, done no more than once in 12 months, are exempt (Bulletin #201).
- Re-roofs: San José lists Re-Roof among the permits available online for commercial and industrial properties (SJPermits.org).
- Who pulls it: the city's own advice is to have your licensed contractor pull the permit, because whoever pulls the permit bears the liability (Bulletin #201).
Title 24 cool roofs and insulation
On nonresidential low-slope roofs, California's Energy Code applies cool-roof requirements when the area replaced, recovered or recoated is more than 50% of the roof or more than 2,000 square feet, whichever is less (Energy Code §141.0(b)2B). The new surface must be a CRRC-rated product that meets the code's reflectance and emittance minimums, and a re-roof over conditioned space in Bay Area climate zones 3, 4 and 12 generally also needs R-23 continuous insulation (BayREN, Table 141.0-C). Recoats are exempt from the insulation rule. San Jose is in climate zone 4. Applicability is reviewed for your specific project during scoping rather than assumed. Our Title 24 re-roof guide walks through the trigger, the cool roof values and the insulation rule.
Commercial roofing services in San Jose
Repair & leak response
Leak calls cluster from November through February. Tracing starts at the interior location and works back to the roof.
Replacement
Re-roofs here bring the 25% permit rule and, above the code threshold, Title 24 cool-roof and insulation requirements.
Restoration & coatings
A recoat above the code's size threshold must meet cool-roof requirements, but recoats are exempt from the insulation rule.
Inspections & condition reports
A free roof condition report with photos, findings and options, best scheduled in September or October.
Preventive maintenance
Pre-season drain and seam checks before the first storms, and a spring visit to plan dry-season work.
Sheet metal, flashing & drainage
Parapet coping, counter-flashing, scuppers and gutters that move water off tilt-up and R&D roofs.
Who we work with in San Jose
Property managers
A COI within 24 hours of request and line-item scopes you can forward to the owner.
HOA boards & community managers
Board-ready bid packages with good, better and best options, timed around the reserve study.
Owners & facility teams
Repair versus replace explained in plain terms, with schedule and tenant impact planned up front.
Nearby cities we also cover
Santa Clara and Sunnyvale are next door, and we also work in Milpitas and Mountain View. See commercial roofing across Santa Clara County, and the other five Bay Area counties we serve.
Frequently Asked Questions
Commercial Roofing Inc. repairs and replaces commercial and HOA roofs across San Jose and Santa Clara County: leak tracing, temporary and permanent repairs, inspections, coatings and re-roofs. You get a photo report and a line-item scope you can forward. Call (408) 770-5992 or request a bid.
Yes. San José requires a building permit when 25% or more of a roof is replaced or repaired, and commercial and industrial re-roof permits can be applied for online through SJPermits.org. The city recommends the licensed contractor pull the permit, because whoever pulls it bears liability for the work.
Usually. California's Energy Code sets cool-roof requirements when a nonresidential low-slope roof is replaced, recovered or recoated over more than 50% of its area or more than 2,000 square feet, whichever is less. A re-roof over conditioned space in climate zone 4 generally also needs R-23 continuous insulation. Recoats are exempt from the insulation rule.
For planned re-roofs and coatings, the dry season, roughly April through October, since about 82% of San Jose's annual rain falls November through March, per the National Weather Service. Pre-storm inspections and drain cleaning make most sense in September and October, before the first big rain.
Yes. Bid packages come with good, better and best options so community managers can compare bids and present them at a board meeting. See HOA and condo roofing.
It depends on roof size and access, tear-off versus recover, the number of existing layers, required insulation, the roof system, Title 24 requirements, rooftop equipment, permits and phasing around tenants. A free roof condition report is the way to get a real number for your building.
Let's get started
Request a bid for a San Jose building
Tell us about the building and what you need. Bid invites and plans are welcome. For an active leak, call.
- (408) 770-5992Calling is fastest for an active leak