A leak on a flat roof is a today problem, not a next-week problem. Calbest answers in about two hours — every message, 100% of the time — and carries a 5.0 rating across 72 reviews. Owner Steve Kim quotes the job himself.
Residential and commercial roofing across San Francisco and San Mateo County.
Modified bitumen systems for flat and low-sloped roofs — the work Calbest is built around.
Asphaltic shingle systems for pitched and sloped roofs.
Leak assessment and repair, including storm damage.
Full residential roof replacement, tear-off through cleanup.
Rotted decking, rafters and fascia replaced before the new roof goes on.
Commercial buildings and multi-unit properties.
Calbest Roofing is a Redwood City roofing corporation run by Steve Kim, licensed by the California Contractors State License Board (#1069869) and BBB-accredited with an A+ rating since 2021. Where most Peninsula roofers treat flat roofs as an afterthought between shingle jobs, Calbest built the business around modified bitumen systems — and takes the sloped shingle work too.
The public permit record shows 103 permitted projects, 74 of them roofing, in San Mateo, San Bruno, San Francisco, Belmont and Redwood City. BuildZoom scores the license 111, the top 4% of California's licensed contractors. The customer listing carries a 5.0 rating across 72 reviews, with a typical response time of about two hours.
“I needed my whole roof repaired due a leakage and old condition from original work. Steve came by and quoted the work asap and had very fair prices.”
“So glad we found Steve and his team! We had discovered a leak during the recent storms … got the work done just a few days later!”
San Francisco County, San Mateo County and parts of San Jose. Permitted projects on record in:
Call, or send a few details. Expect an answer in about two hours during business hours.
| Mon–Fri | 8:00 AM – 5:00 PM |
| Saturday | 8:00 AM – 1:00 PM |
| Sunday | Closed |