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One Roofing

5.0 from 32 reviews

Roofing contractor in San Francisco, California

B 1148106Street address on fileWebsite

License Verified

1148106 with Contractors State License Board, clear status, classified B, issued December 23, 2025. Note that this license does not carry the C-39 Roofing classification. Ask them which classification covers the work you need before you sign.

We read the state file on September 20, 2026. A license can change status any week, so check it yourself before you hand over money. Check it on the Contractors State License Board site.

One Roofing is a roofing company in San Francisco, California, rated 5.0 out of 5 from 32 reviews.

At a glance

Based in San Francisco, in the San Francisco part of the county.
Rated 5.0 out of 5 across 32 reviews.
Posted hours are listed below.
Has a website you can check before calling.

What to ask when you call

Every roofer in this directory is a real company with a working number. What separates a good call from a wasted one is the questions you bring. Ask for the state contractor license number and the C-39 Roofing classification. Ask whether the crew doing the work is on staff or subcontracted. Ask who pulls the permit and who handles the city inspection.

California licenses roofing contractors through the Contractors State License Board. Look up a license before you hire.

Then ask for the quote in writing with the roof area in squares, the material by product name, a price per sheet for any bad plywood, and the labor warranty in months. A company that gives you all of that on the first call has done this a lot.

Before you sign anything

In California, keep the deposit inside the state cap of one thousand dollars or ten percent. If a bid comes in far under the others, find out what got left out of the scope rather than assuming you found a deal.

Our guide to reading a roofing estimate walks through the lines that belong on every quote. Checking a contractor license takes about ten minutes.