San Leandro · Alameda County
Commercial Roofing in San Leandro: Industrial, Warehouse and Multifamily Roofs
Industrial, warehouse, multifamily and HOA roofs across San Leandro.
- Free roof condition report
- Good, better and best bid options
- Certificate of insurance within 24 hours of request
San Leandro's industrial roofs
Kidder Mathews counts 24,325,276 square feet of industrial space in the San Leandro/San Lorenzo submarket, at 10.3% total vacancy and 12.2% availability. Year to date, the submarket absorbed +231,973 square feet while the East Bay as a whole was at −135,790 square feet (East Bay Industrial, Q3 2026).
Space is being taken up, so owners either re-roof with tenants in the building or get roofs ready for new ones. On big low-slope roofs, the choice between repair, coating and replacement is an expensive one. See also TPO roofing.
Apartments and townhomes
The California Department of Finance counts 8,815 units in 5+ unit buildings and 2,170 single-attached units in San Leandro, population 87,431 (January 1, 2026).
Illustrative image, not a completed project.
San Leandro permits: reroofs skip plan review
- The City lists reroofs among work that can be issued without plan review, and says re-roofing permits are usually issued over the counter in a single visit to the Permit Center (City of San Leandro FAQs).
- Apply online through the City's permit portal, or in person at the Permit Center by appointment.
- The City's current codes are the 2025 California codes (City of San Leandro, Permits and Plan Review).
- Plan review comes back into play when the scope goes beyond the reroof, such as structural work or rooftop equipment changes.
Next door, Oakland lists a separate “Non-Residential Re-Roofing” permit type (City of Oakland permit types).
Flatlands and hills: San Leandro rain
NOAA's 1991–2020 normals (NCEI) show two rain levels in one city:
- Bay flats: Oakland International Airport, about 4 miles west, averages 18.68 inches a year, December wettest at 3.84 inches.
- Hills: the Upper San Leandro Filters station, above the city, averages 25.25 inches, December wettest at 5.12 inches.
That's about 35% more rain in the hills (25.25 vs. 18.68 inches, NCEI). Industrial roofs on the flats get less rain but often have flat decks and long drain runs; hillside multifamily and HOA roofs get more. See flashing, sheet metal and drainage.
Title 24 and warehouses
San Leandro ZIP codes 94577, 94578 and 94579 are in climate zone 3 (CEC ZIP list). 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. Roof area over unconditioned warehouse space doesn't trigger the cool-roof rules (CEC FAQ), which matters on distribution buildings. Our Title 24 re-roof guide walks through the trigger, the cool roof values and the insulation rule.
Common calls in San Leandro
Ponding and drain backups
Standing water on big industrial roofs with long drain runs.
Skylight and curb leaks
Around skylights, rooftop units and penetrations on warehouses.
Fastener back-out
Fasteners working loose on mechanically attached single-ply roofs.
Apartment flat roofs
Low-slope roofs on apartment buildings. See commercial roof repair.
Who we work with in San Leandro
Property managers
A line-item scope to forward to the owner, and a COI within 24 hours of request.
Facility teams
Condition reports and repair, coat or replace options for industrial buildings.
HOA boards
Board-ready good, better and best options for townhome communities.
Nearby
Oakland: north, with its own “Non-Residential Re-Roofing” permit type.
Hayward: south on I-880, with a permit trigger at 200 square feet.
Fremont: further south, the East Bay's largest industrial submarket with Newark (Kidder Mathews).
The rest of the county: commercial roofing in Alameda County.
Frequently Asked Questions
Usually not. San Leandro lists reroofs among work issued without plan review, and the City says re-roofing permits are usually issued over the counter in a single visit. You can apply online or at the Permit Center. Structural changes or new rooftop equipment can move a project into plan review.
Commercial Roofing Inc. repairs, inspects, coats and replaces roofs on San Leandro industrial, warehouse, multifamily and HOA buildings. We document leak sources with photos and send a line-item scope with repair, coating and replacement options. Call (408) 770-5992 or request a bid.
Only to the parts over conditioned space. Roof area over an unconditioned warehouse doesn't trigger California's cool-roof rules. Over office or other conditioned space in climate zone 3, a qualifying low-slope re-roof needs a CRRC-rated cool roof and R-23 continuous insulation.
It depends on elevation. NOAA's 1991–2020 normals show about 18.7 inches a year at Oakland's airport on the bay shore and about 25.3 inches at the Upper San Leandro Filters station in the hills. December is the wettest month at both.
Coating suits a roof with a sound deck and little wet insulation, and it avoids a tear-off and the disruption that comes with it. Widespread wet insulation or failed seams point to replacement. Find out how much of the roof is wet before you spend on either.
Let's get started
Request a bid for a San Leandro building
Tell us the property, the building type and what you need. Bid invites and plans are welcome. For an active leak, call.
- (408) 770-5992Calling is fastest for an active leak