Adermatt Charles J Inc

Adermatt Charles J Inc of San Juan Capistrano holds California license 528200 (B General Building, C10 Electrical). The CSLB file dated Oct 31, 2026 lists it as active.¹ It expires Apr 30, 2028.

Licensed 38 years, longer than 86% of 23 active San Juan Capistrano electrical contractors.

Active

Adermatt Charles J Inc, San Juan Capistrano

License: 528200
Class: B General Building; C10 Electrical
Expires: Apr 30, 2028
Bond: $25,000
Workers' comp: Exempt

CSLB file dated Oct 31, 2026

From the CSLB file dated Oct 31, 2026. Not a consumer report; check the board before you hire.

Has the board taken action on this license?

None in the CSLB file dated Oct 31, 2026. Confirm with the board: CSLB license check

What bond, insurance and workers' comp are on file?

Bond: $25,000Atlantic Specialty Insurance Company, from Oct 10, 2025, continuous
Liability insurance: Not in the CSLB fileCheck with the board
Workers' comp: Exemptfrom Jun 8, 2026

What work does this license cover?

Issued Apr 12, 1988.

The workers' comp exemption means the holder told the CSLB it has no employees. If a crew works on your job, ask for a workers' comp certificate.

Which other San Juan Capistrano businesses hold B General Building?

Szemenyei Construction IncLicensed since 1986
Taylor John S General Contracting IncLicensed since 1988
Gabay Dave General BLDG Contractor IncLicensed since 1988
Joseph C Steelman General Contractor LLCLicensed since 1988
Karger CorporationLicensed since 1989

California electrical contractors General Contractors in San Juan Capistrano California general contractors

What should you check before hiring?

What to ask before you hire

Get the license number in writing. The name on the license should match the name on your contract and invoice.
Check the class covers the job. A license for one trade doesn't cover another. California license classes
Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
Ask who will be on site. If a crew works on your property, ask for proof of workers' comp. An exemption on file means the contractor told the CSLB it has no employees.
Put it in a written contract: license number, price, start date and payment schedule. Check the license again on the day you sign.

If the license is lapsed

Don't sign or pay a deposit until the CSLB shows the license active again.
Ask the contractor why. For a bond or insurance lapse, ask for proof that the new bond or policy was filed with the CSLB, then check again.
If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
Check another contractor. California license lookup

Sources

CSLB License Master (cslb.ca.gov, Oct 31, 2026)
Contractors State License Board (CSLB)