Licensed General Building (B) contractors in Columbia, CA

The California Contractors State License Board (CSLB) lists 26 General Building (B) contractors in Columbia, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of August 14, 2026.

26 contractors

1. Warren R Christianson

   Columbia, CA · CSLB #344886 · as of August 14, 2026
   Active · clear
2. Ed Renovate Enchance Negotciate Trade Service

   Columbia, CA · CSLB #593201 · as of August 14, 2026
   Active · clear
3. First Finish LLC

   Columbia, CA · CSLB #981707 · as of August 14, 2026
   Active · clear
4. Grayum Construction

   Columbia, CA · CSLB #842366 · as of August 14, 2026
   Active · clear
5. Gunn Henderson Construction

   Columbia, CA · CSLB #1117665 · as of August 14, 2026
   Active · clear
6. Ray Hall Construction INC

   Columbia, CA · CSLB #826584 · as of August 14, 2026
   Active · clear
7. Humphrey Rich Construction Group INC

   Columbia, CA · CSLB #1035599 · as of August 14, 2026
   Active · clear
8. KR Construction

   Columbia, CA · CSLB #1121038 · as of August 14, 2026
   Active · clear
9. Bradford W Lorenzen DBA Lorenzen Construction

   Columbia, CA · CSLB #706031 · as of August 14, 2026
   Active · clear
10. Max Potter Construction

    Columbia, CA · CSLB #835869 · as of August 14, 2026
    Active · clear
11. Milcon Systems INC

    Columbia, CA · CSLB #955962 · as of August 14, 2026
    Active · clear
12. Mobley Construction Company

    Columbia, CA · CSLB #1144709 · as of August 14, 2026
    Active · clear
13. Mother Lode Services

    Columbia, CA · CSLB #727768 · as of August 14, 2026
    Active · clear
14. Mountain Mann Construction

    Columbia, CA · CSLB #1078300 · as of August 14, 2026
    Active · clear
15. M R G Construction

    Columbia, CA · CSLB #1002412 · as of August 14, 2026
    Active · clear
16. Eric Owens Construction

    Columbia, CA · CSLB #809550 · as of August 14, 2026
    Active · clear
17. Bob Ragan Construction

    Columbia, CA · CSLB #335069 · as of August 14, 2026
    Active · clear
18. Duane Ragan Construction

    Columbia, CA · CSLB #874188 · as of August 14, 2026
    Active · clear
19. Ron Hessler Construction INC

    Columbia, CA · CSLB #414227 · as of August 14, 2026
    Active · clear
20. Zak Sawyer Construction

    Columbia, CA · CSLB #973204 · as of August 14, 2026
    Active · clear
21. Tri County Construction

    Columbia, CA · CSLB #926021 · as of August 14, 2026
    Active · clear
22. Wynne Construction

    Columbia, CA · CSLB #1027918 · as of August 14, 2026
    Active · clear
23. Adam Ehlers Construction

    Columbia, CA · CSLB #1118141 · as of August 14, 2026
    Suspended · bond
24. Michael Patrick Gorman

    Columbia, CA · CSLB #989032 · as of August 14, 2026
    Suspended · bond
25. Mid America Contracting INC

    Columbia, CA · CSLB #1065417 · as of August 14, 2026
    Suspended · bond
26. American Made Masonry

    Columbia, CA · CSLB #956393 · as of August 14, 2026
    Suspended · workers' comp

See all General Building (B) contractors in California →

Data sourced from the California Contractors State License Board (CSLB), current as of August 14, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.