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California contractor license
Renkow Service Co
Renkow Service Co of Gardena holds California license 741409 (C20 Warm-Air Heating, Ventilating and Air-Conditioning). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Oct 31, 2027.
Doing business as Renkow Group Inc.
Licensed 29 years, longer than 54% of 22 active Gardena HVAC contractors.
Active
Renkow Service Co, Gardena
- License
- 741409
- Class
- C20 Warm-Air Heating, Ventilating and Air-Conditioning
- Expires
- Oct 31, 2027
- Bond
- $25,000
- Workers' comp
- Insured to Jul 1, 2027
CSLB file dated Nov 1, 2026
From the CSLB file dated Nov 1, 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 Nov 1, 2026. Confirm with the board: CSLB license check
What bond, insurance and workers' comp are on file?
- Bond
- $25,000Merchants Bonding Company (Mutual), from Jan 30, 2026, continuous
- Liability insurance
- Not in the CSLB fileCheck with the board
- Workers' comp
- InsuredHartford Casualty Insurance Company, from Jul 1, 2026, to Jul 1, 2027
Who is on this license?
- Responsible managing officer, CEO and president
- Arvester GladneySince Jun 17, 1999
What work does this license cover?
Issued Oct 15, 1997.
Which other Gardena businesses hold C20 Warm-Air Heating, Ventilating and Air-Conditioning?
- Horizon HVAC IncLicensed since 1986
- Ace Mechanical Heating And Air ConditioningLicensed since 2002
- Cooland IncLicensed since 2009
- L P AC & Heating IncLicensed since 2016
- AC & Heat Contractor IncLicensed 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, Nov 1, 2026)
- Contractors State License Board (CSLB)