Alameda County · East Bay
Commercial Roofing in Alameda County: East Bay Industrial, Multifamily and HOA Roofs
Commercial, industrial and HOA roofs across Alameda County: Oakland · Fremont · Hayward · San Leandro · Pleasanton.
- Free roof condition report
- Good, better and best bid options
- Certificate of insurance within 24 hours of request
The East Bay's industrial roofs
Kidder Mathews counts 211.6 million square feet of industrial space across nine East Bay submarkets (East Bay Industrial, Q3 2026); Kidder's East Bay also includes Richmond, in Contra Costa County. The four largest are in Alameda County:
| Submarket | Industrial square feet |
|---|---|
| Fremont / Newark | 58.6 million |
| Hayward | 43.5 million |
| Oakland | 34.4 million (11.4% total vacancy) |
| San Leandro / San Lorenzo | 24.3 million |
Fremont also has 17.7 million square feet of R&D (Kidder Mathews, Silicon Valley R&D, Q3 2026), so the south county looks more like the South Bay. On the roof, that means big low-slope areas in TPO, modified bitumen, metal and coatings, with skylights and drainage across large areas.
Multifamily and HOA buildings
The California Department of Finance counts 199,668 units in 5+ unit buildings, 67,311 in 2–4 unit buildings and 53,323 single-attached units in Alameda County, population 1,666,136 (January 1, 2026). By city:
| City | Units in 5+ unit buildings |
|---|---|
| Oakland | 75,539 |
| Fremont | 23,423 |
| Berkeley | 20,957 |
| Hayward | 15,466 |
| Alameda | 11,078 |
| San Leandro | 8,815 |
| Dublin | 8,271 |
| Emeryville | 6,808 |
| Pleasanton | 6,782 |
In Emeryville, 6,808 of 8,469 housing units are in 5+ unit buildings, about 80% (DOF).
Two climates in one county
NOAA's 1991–2020 normals show two different roof environments:
- Bay side: Oakland International Airport averages 18.68 inches of rain a year, with December the wettest month (3.84 inches), and a July average high of 71.6°F.
- Tri-Valley: the Livermore station averages 14.60 inches a year, with a July average high of 89.0°F.
Two Title 24 climate zones
The California Energy Commission's ZIP list puts the Oakland, Berkeley, San Leandro, San Lorenzo, Castro Valley, Hayward and Fremont ZIPs we checked in climate zone 3, and the Livermore, Pleasanton and Dublin ZIPs in climate zone 12. For nonresidential low-slope re-roofs, the cool-roof minimums and R-23 continuous insulation over conditioned space apply in both zones (BayREN), so the code result is similar. Confirm a building's zone by address with the CEC's tool. Our Title 24 re-roof guide walks through the trigger, the cool roof values and the insulation rule.
The difference is exposure. Bay-side roofs need drainage and wind-driven leak checks before December. Tri-Valley roofs take far more summer heat and UV, so reflectance, coating condition and heat-aging of membranes and sealants matter more.
Permits: city by city, plus the unincorporated county
| Where | What we've confirmed | Source |
|---|---|---|
| Oakland | A “Non-Residential Re-Roofing” permit type in the Online Permit Center; the contractor needs a current Oakland Business Tax Certificate | City of Oakland |
| Unincorporated areas (Castro Valley, San Lorenzo, Ashland, Cherryland, Fairview, Sunol) | The Alameda County Permit Portal lists RE-ROOF as a non-residential building permit with no plan review | permit.acgov.org |
| Fremont | An Express Reroof permit for residential and commercial re-roofs removing and replacing more than 100 square feet, applied for online and issued automatically; commercial roofs with solar removal need a regular building permit | City of Fremont, Permit Types |
| Hayward | A permit when more than 200 square feet of roof covering is installed, repaired or replaced; re-roofs are usually over the counter | City of Hayward, Reroofing Requirements; Permit Center FAQ |
| San Leandro | Reroofs are issued without plan review, usually over the counter in one visit; apply online or at the Permit Center | City of San Leandro FAQs |
| Pleasanton | Roof repairs up to the lesser of 25% of the roof area or 500 square feet are exempt; a reroof is a “Commercial Alteration” permit applied for online, and Planning approval may still apply | City of Pleasanton, Construction Permit Requirements and Exemptions |
Cities we cover
Oakland
32,987 units in 2–4 unit buildings alongside 75,539 in 5+ (DOF): a small-multifamily city with 34.4 million square feet of industrial (Kidder Mathews).
Fremont
The largest industrial submarket in the East Bay (58.6 million square feet with Newark), plus 17.7 million of R&D (Kidder Mathews).
Hayward
43.5 million square feet of industrial at 11.7% vacancy, with the East Bay's highest sublease rate (Kidder Mathews).
San Leandro
24.3 million square feet of industrial with San Lorenzo (Kidder Mathews), and 8,815 units in 5+ unit buildings (DOF).
Pleasanton
Climate zone 12 in the Tri-Valley.
Services across the county
Repair & leak response
Leak tracing on industrial and multifamily roofs, with temporary and permanent repairs.
Replacement
Tear-off or recover, with each city's permit and the Title 24 cool-roof and insulation rules.
Restoration & coatings
Reflective coatings on sound roofs, where Tri-Valley heat and UV make the case.
Inspections & condition reports
A free roof condition report, including before a re-lease.
Preventive maintenance
Drains and flashings checked before December on the bay side.
TPO roofing
White, heat-welded single-ply on the I-880 tilt-ups and warehouses.
Neighboring counties
Santa Clara County: south of Fremont, a drier valley in climate zone 4 with the largest R&D stock in the region. See commercial roofing in Santa Clara County.
Contra Costa County: north and east, the I-680 office and HOA belt. See commercial roofing in Contra Costa County.
Across the bay: commercial roofing in San Francisco.
Frequently Asked Questions
Yes. Commercial Roofing Inc. repairs, inspects, coats and replaces commercial, industrial and HOA roofs across Alameda County, from Oakland and Berkeley through the I-880 cities of San Leandro, Hayward and Fremont to Pleasanton and the Tri-Valley. Call (408) 770-5992 or request a bid.
Alameda County issues them through its online permit portal, which lists re-roofing as a non-residential building permit that doesn't require plan review. Properties inside a city, such as Oakland or Hayward, go through that city's building department instead, and each city sets its own process.
In summer, yes. NOAA's 1991–2020 normals put Livermore's average July high at 89°F, versus about 72°F at Oakland's airport, so inland roofs take more heat and UV. Oakland gets more rain, about 18.7 inches a year versus 14.6 in Livermore. Inland, watch reflectance and coatings; bay-side, watch drainage.
Bay-side cities such as Oakland, San Leandro, Hayward and Fremont are generally climate zone 3, while Livermore, Pleasanton and Dublin are zone 12, per the California Energy Commission's ZIP list. For nonresidential low-slope re-roofs, both zones require cool roof products and, over conditioned space, R-23 continuous insulation. Confirm by address.
Yes. The East Bay has more than 211 million square feet of industrial space, per Kidder Mathews, much of it under large low-slope roofs. We inspect, repair, coat and re-roof these buildings and document conditions with photos, so you can compare options before committing to a scope.
Let's get started
Request a bid for an Alameda County building
Tell us the city, 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