Structural steel contractors in South San Francisco, CA

1 licenses with the C-51 classification list South San Francisco (San Mateo County) as their address with the state, 1 of them active. Active licenses with nothing flagged come first.

• ✓Umili America IncC-23 · C-51 · #454679 South San Francisco · San Mateo County Active

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