Bay City Mechanical Incorporated (CSLB #645126)
CSLB #645126
Richmond, CA · (510) 233-7000
License status
Active
Expires May 31, 2028 · Issued 1992
Expires May 31, 2028Issued May 15, 1992
BondContractor bond
$25,000
Fidelity And Deposit Co. Of Maryland
Workers' comp
On filePolicy on file
Zurich American Ins. Co. · to Oct 1, 2027Zurich American Ins. Co. Runs to October 1, 2027
ClassesClassifications
B General building · C-4 · C-20 Warm-air heating, ventilating and air-conditioning · C-36 Plumbing · C-43
FROM THE CSLB FILE DATED NOV 6, 2026
Status can change the same day. We don't approve contractors; this is the state's public file.
Check this license at CSLB ↗CSLB file dated NOV 6, 2026 · Status can change the same day · Check at CSLB ↗
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Helge Theiss-nyland
Role: Responsible managing officer, chief executive officer, president
Qualifies: C-20, C-43, B
Marisa Ann Calavano
Role: Responsible managing employee
Qualifies: C-36, C-4
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The full record
- Business address
- 870 HARBOUR WAY SOUTH, Richmond, CA 94804
- Phone
- (510) 233-7000
- Bond
- Fidelity And Deposit Company Of Maryland · $25,000
- Workers' comp
- Zurich American Insurance Company · policy WC805598000 · Oct 1, 2026 to Oct 1, 2027
About this license
Bay City Mechanical Incorporated of Richmond, CA holds California contractor license #645126 in B — General building, C-4, C-20 — Warm-air heating, ventilating and air-conditioning, C-36 — Plumbing, and C-43. The business phone on the license is (510) 233-7000. The license was issued May 15, 1992 and expires May 31, 2028, and the CSLB file lists it as active. Its contractor bond of $25,000 is with Fidelity And Deposit Company Of Maryland. Workers' compensation is with Zurich American Insurance Company, policy dates October 1, 2026 – October 1, 2027. People on the license include Helge Theiss-nyland (Responsible Managing Officer/Chief Executive Officer/President) and Marisa Ann Calavano (Responsible Managing Employee).