Electrical contractor (C-10) in Ontario, CA

31 licenses · checked Oct 27, 2026

There are 31 Electrical contractor (C-10) licenses with an address of record in Ontario, CA, in the CSLB License Master data checked Oct 27, 2026. That is 0.8% of the 3,983 such licenses statewide; Ontario ranks #15 of 620 CA cities for this license type. They are spread across 3 ZIP codes; the most common are 91761 (17), 91762 (9), 91764 (5). Most list San Bernardino County. By business type: Corporation 18, Sole Owner 8, Limited Liability 4, JointVenture 1. The median first-issue year is 2018; the oldest license dates from 2015. 10 of them come up for renewal or expiration in the next 12 months, so re-check status before you sign a contract.

What a Electrical contractor (C-10) license covers

Electrical (C-10) covers placing, installing, erecting or connecting electrical wires, fixtures, appliances, conduits and apparatus that generate, transmit or use electrical energy, including service panels and solar photovoltaic wiring.

How to verify a license

Enter the license number in CSLB Instant License Check and confirm the status is active, the classification matches the work, and the contractor has a current bond and workers' compensation coverage (or a valid exemption). California requires the license number on contracts and advertising. Official lookup: CSLB Instant License Check.

Electrical contractor (C-10) licenses in Ontario

Showing 31 of 31, A to Z. Listing order is alphabetical, not a recommendation.

Frequently asked questions

How many Electrical contractor (C-10) licenses are in Ontario?

31 active licenses in the CSLB License Master data checked Oct 27, 2026 (0.8% of CA).

What does a Electrical contractor (C-10) license cover?

Electrical (C-10) covers placing, installing, erecting or connecting electrical wires, fixtures, appliances, conduits and apparatus that generate, transmit or use electrical energy, including service panels and solar photovoltaic wiring.

How do I verify a Electrical contractor (C-10) license in Ontario?

Enter the license number in CSLB Instant License Check and confirm the status is active, the classification matches the work, and the contractor has a current bond and workers' compensation coverage (or a valid exemption). California requires the license number on contracts and advertising. Use the license number shown here with the CSLB Instant License Check.

How many Ontario Electrical contractor (C-10) licenses expire soon?

10 of 31 have an expiration date in the next 12 months. A license that lapses must be renewed before the holder can work under it again.

Other license types in Ontario

General building contractor (45) · General engineering contractor (16) · Painting contractor (C-33) (13) · HVAC contractor (C-20) (13) · Plumbing contractor (C-36) (10) · Low-voltage contractor (C-7) (9) · Landscaping contractor (C-27) (7) · Drywall contractor (C-9) (6) · Tile contractor (C-54) (4) · Cabinet and finish carpentry contractor (C-6) (4) · Flooring contractor (C-15) (3) · Concrete contractor (C-8) (3)

All Electrical contractor (C-10) licenses in CA →

Source: CSLB License Master. Licensed California is independent and not affiliated with the licensing agency. Data checked Oct 27, 2026.