Boiler, hot water heating and steam fitting contractors in San Francisco, CA

45 licenses with the C-4 classification list San Francisco (San Francisco County) as their address with the state, 43 of them active. Active licenses with nothing flagged come first.

• ✓White Water Plumbing Inc Dba Clear Flow PlumbingC-4 · C-36 · #875153 San Francisco · San Francisco County Active
• ✓Yum'S Mechanical Co IncC-4 · C-10 · C-20 · C-43 · #583839 San Francisco · San Francisco County Active
• !S F Garage Company Inc.A · B · C-4 · C-10 +2 · #684863 San Francisco · San Francisco County Active Disciplinary bond on file
• !Boilers and Heating Systems Specialist LLCC-4 · #1093232 San Francisco · San Francisco County Suspended: worker bond lapsed
• !United California HVACC-4 · C-10 · C-36 · C-38 · #1071891 San Francisco · San Francisco County Suspended: secretary of state

Source: CSLB license file, Nov 8, 2026All trades in San Francisco