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California contractor license
Knight Mechanical Services Inc
Knight Mechanical Services Inc of Laguna Hills holds California license 714423 (C20 Warm-Air Heating, Ventilating and Air-Conditioning). The CSLB file dated Oct 31, 2026 lists it as active.1 It expires Sep 30, 2027.
Licensed 31 years, longer than 83% of 7,822 active California HVAC contractors.
Active
Knight Mechanical Services Inc, Laguna Hills
- License
- 714423
- Class
- C20 Warm-Air Heating, Ventilating and Air-Conditioning
- Expires
- Sep 30, 2027
- Bond
- $25,000
- Workers' comp
- Insured to Sep 9, 2027
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 Jun 28, 2026, continuous
- Liability insurance
- Not in the CSLB fileCheck with the board
- Workers' comp
- InsuredSecurity National Insurance Company, from Sep 9, 2026, to Sep 9, 2027
Who is on this license?
- Responsible managing officer, CEO and president
- Steven C. DondanvilleSince Oct 26, 1995
What work does this license cover?
Issued Oct 26, 1995. Inactive Nov 1, 1997 to Sep 22, 2011. Reissued Sep 22, 2011.
Which other Laguna Hills businesses hold C20 Warm-Air Heating, Ventilating and Air-Conditioning?
- Phoenix South IncLicensed since 1998
- Air Conditioning Services Of California IncLicensed since 2003
- Controlled Climates IncLicensed since 2004
- True Home Heating And Air ConditioningLicensed since 2017
- Cycle Heating And Air LLCLicensed since 2024
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)