Licensed Contractors in San Ramon, California

San Ramon has 322 licensed contractors registered with the California Contractors State License Board across 45 trade classifications. The most common specialties are Electrical Contractor (37), Plumbing Contractor (21), Warm-Air Heating, Ventilating and Air-Conditioning (HVAC) Contractor (18). 199 contractors hold general contractor licenses (Class A or B).

All license data is sourced from the California Contractors State License Board (CSLB). Last data update: February 20, 2026.

Contractors by Classification

General Contractors

B: General Building Contractor (167) A: General Engineering Contractor (31) B-2: Residential Remodeling Contractor (1)

Specialty Contractors

Show all 42 specialty classifications

Gentz Construction Inc Active
License #336930 B San Ramon, CA Est. 1977
Smith & Son Active
License #386621 C-33 San Ramon, CA Est. 1979
Morgan Electric Inc Active
License #396423 C-10 San Ramon, CA Est. 1980
Michael Clancy Construction Active
License #410491 B San Ramon, CA Est. 1981
Alcosta Shower Door Inc Active
License #416420 D08 San Ramon, CA Est. 1982
Kurt Alan Rieboldt Dba Northwest Concrete Active
License #442983 C-8 San Ramon, CA Est. 1983
Landscape Dynamics Active
License #443939 B, C-27 San Ramon, CA Est. 1983
Man Tat Szeto Active
License #446926 B San Ramon, CA Est. 1983
Advanced Automatic Sprinkler Inc Active
License #479521 C-16 San Ramon, CA Est. 1985
Sut'S Superior Underground Tank Service Inc Active
License #482356 A, B +3 more San Ramon, CA Est. 1985
Shu Sun Poon Active
License #497415 B San Ramon, CA Est. 1986
R S W Specialties Active
License #500429 C-33 San Ramon, CA Est. 1986
Calcon Systems Inc Active
License #508284 C-10 San Ramon, CA Est. 1987
C M Farr Metal Construction Inc Active
License #526206 C-23, C-60 San Ramon, CA Est. 1988
Summerhill Construction Company Active
License #528275 B San Ramon, CA Est. 1988
Young & Burton Inc Active
License #531879 B, C-8 San Ramon, CA Est. 1988
Patricia L Thompson Active
License #535617 C-27 San Ramon, CA Est. 1988
Peter Construction Active
License #535822 B San Ramon, CA Est. 1988
Defentec Security Active
License #547780 C-7, C-10 San Ramon, CA Est. 1988
Donald Utley Active
License #553201 B San Ramon, CA Est. 1989
Native Sons Landscaping Incorporated Active
License #556113 B, C-27 San Ramon, CA Est. 1989
Bernard Construction Co Inc Active
License #557760 B San Ramon, CA Est. 1989
Plumbing Unlimited California Active
License #564231 C-36 San Ramon, CA Est. 1989
R C Construction Active
License #573165 B San Ramon, CA Est. 1989
C / S Erectors Inc Active
License #575606 C-17 San Ramon, CA Est. 1989
Sunview Landscape Active
License #587956 C-27 San Ramon, CA Est. 1990
Vanni Electric Service Active
License #594617 C-10 San Ramon, CA Est. 1990
Mc Guire Electric Active
License #605447 C-10 San Ramon, CA Est. 1990
S Costa Construction Inc Active
License #607454 B San Ramon, CA Est. 1990
Chui'S Construction Active
License #609892 B San Ramon, CA Est. 1991
Electrical Source Ltd Active
License #611866 C-10 San Ramon, CA Est. 1991
Hugh Armand Donatello Active
License #619627 B San Ramon, CA Est. 1991
Four Brothers Active
License #627506 B San Ramon, CA Est. 1991
Solar Control Glass Tinting Company Active
License #636209 D52 San Ramon, CA Est. 1992
California Interior Shutters Active
License #636241 D52 San Ramon, CA Est. 1992
Davidson Tile Active
License #637980 C-54 San Ramon, CA Est. 1992
Abstract Drywall Active
License #642989 C-9 San Ramon, CA Est. 1992
Sunset Development Company Active
License #644638 B San Ramon, CA Est. 1992
Tnd Engineering & Construction Active
License #645402 B San Ramon, CA Est. 1992
Douglas M Brandeburg Active
License #645573 B San Ramon, CA Est. 1992
Gene'S Laser Grading Active
License #652604 C-12 San Ramon, CA Est. 1992
Roof Life Construction Active
License #653956 B, C-39 San Ramon, CA Est. 1992
Tri Valley Plumbing Active
License #654790 C-36 San Ramon, CA Est. 1992
Aztec Consultants Active
License #659133 A, B San Ramon, CA Est. 1992
Uniframe Windows And Siding Inc Active
License #665358 C-17, D41 San Ramon, CA Est. 1993
Dave'S Pool Service Active
License #672475 D35 San Ramon, CA Est. 1993
The Helsing Group Inc Active
License #672692 B San Ramon, CA Est. 1993
D'Ambrosio Construction Active
License #677569 B San Ramon, CA Est. 1993
Mihos Painting Active
License #693518 C-33 San Ramon, CA Est. 1994
Color Touch Painting Inc Active
License #698327 C-33 San Ramon, CA Est. 1994

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