Licensed Contractors in Sumner, California

Sumner has 3 licensed contractors registered with the California Contractors State License Board across 3 trade classifications. The most common specialties are Electrical Contractor (1), Low Voltage Systems Contractor (1). 2 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

A: General Engineering Contractor (2)

Specialty Contractors

Potelco Inc Active
License #777857 C-10 Sumner, CA Est. 2000
Sefnco Communications Inc Active
License #913292 A, C-7 Sumner, CA Est. 2008
Infrasource Services Llc Active
License #1071774 A Sumner, CA Est. 2020

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