Redwood City · San Mateo County
Commercial Roofing in Redwood City: Office, Lab and Multifamily Roofs
Office, lab and apartment roofs across Redwood City.
- Free roof condition report
- Good, better and best bid options
- Certificate of insurance within 24 hours of request
Redwood City's permit and work-hour rules
From the City of Redwood City Building Division:
- Roofing permits are reviewed over the counter (Approximate Plan Review Times).
- Applications are electronic only, through the city's eTRAKiT portal.
- At inspections, the contractor must have a qualified employee on site with the plans, permit and job card (Building FAQ).
- Construction hours are 7 a.m. to 8 p.m., Monday through Friday. Weekend or holiday work must be requested 30 calendar days ahead and approved in writing by the Building Official; emergency work is allowed after hours (Building FAQ).
- The 2025 California codes apply to applications from January 1, 2026 (city notice).
What that means for scheduling
Offices and labs that want roof work off-hours need a weekend request about a month ahead. Build that lead time into the bid schedule.
Illustrative mockup, not an issued project document.
Office and lab roofs
Redwood City's commercial stock includes office and lab buildings, with rooftop air handlers, exhaust fans and dense penetrations over tenants who stay in operation. Property managers also need COIs and safety paperwork in order before work starts. See roof maintenance programs and TPO roofing.
Title 24
Redwood City ZIPs 94063 and 94065 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. Our Title 24 re-roof guide walks through the trigger, the cool roof values and the insulation rule.
Redwood City weather on roofs
Redwood City has its own NOAA station. Its 1991–2020 normals: 19.02 inches of rain a year, 86% of it November through March, with December (3.92 inches) and January (3.81 inches) the wettest months. The July average high is 81.0°F, warmer than SFO's warmest month (74.8°F in September) (NCEI).
That's more rain than the South Bay and warmer summers than the north Peninsula: concentrated winter rain on drains and flashing, and summer heat on coatings. See flashing, sheet metal and drainage.
Apartments and condos
The California Department of Finance counts 33,575 housing units in Redwood City: 11,925 in 5+ unit buildings, 2,025 in 2–4 unit buildings and 4,491 single-attached, in a city of 81,809 (January 1, 2026). See roofing for property managers and HOA and condo roofing.
Nearby
San Mateo: north, the county's biggest apartment city, with an Express reroof permit.
Menlo Park, San Carlos and Belmont: neighboring mid-Peninsula cities.
Palo Alto is across the county line: see commercial roofing in Santa Clara County.
The rest of the county: commercial roofing in San Mateo County.
Frequently Asked Questions
Only with approval. Redwood City limits construction to 7 a.m. to 8 p.m. on weekdays. Weekend or holiday work has to be requested 30 calendar days ahead and approved in writing by the Building Official; emergency work is allowed after hours. If your building needs weekend phasing, build that lead time into the schedule.
Yes. Redwood City requires a building permit for work that isn't exempt under the building code, and roofing permits are reviewed over the counter. Applications are submitted electronically through the city's eTRAKiT portal, and a qualified contractor employee must be on site with the permit and job card for inspections.
Commercial Roofing Inc. repairs, inspects, coats and replaces roofs on Redwood City office and apartment buildings. Schedules have to fit the city's weekday work hours, so plan any weekend work a month ahead. You get a photo report and good, better and best options. Call (408) 770-5992 or request a bid.
About 19 inches a year, according to NOAA's 1991–2020 normals for the Redwood City station, and 86% of it falls November through March. December and January are the wettest months. Get drains, scuppers and flashing checked in early fall, before that run of storms.
Let's get started
Request a bid for a Redwood City 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