Skip to content
State files updated Oct 28, 2026
Look up a contractor
MenuClose

Home / License lookup / California / Advanced Conservation Systems Inc

California contractor license

Advanced Conservation Systems Inc

Advanced Conservation Systems Inc of Lancaster holds California license 508902 (B General Building, C2 Insulation and Acoustical, C46 Solar). The CSLB file dated Oct 28, 2026 lists it as active.1 It expires Apr 30, 2027.

Licensed 39 years, longer than 95% of 181 active Lancaster general contractors.

Active

Advanced Conservation Systems Inc, Lancaster

License
508902
Class
B General Building; C2 Insulation and Acoustical; C46 Solar
Expires
Apr 30, 2027
Bond
$25,000
Workers' comp
Insured to Oct 1, 2027

CSLB file dated Oct 28, 2026

From the CSLB file dated Oct 28, 2026. Not a consumer report; check the board before you hire.

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

Bond
$25,000Western Surety Company, from Apr 5, 2025, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredSunz Insurance Company, from Oct 1, 2026, to Oct 1, 2027

What work does this license cover?

Issued Apr 10, 1987.

Which other Lancaster businesses hold B General Building?

General Contractors in LancasterCalifornia general contractors

What should you check before hiring?

What to ask before you hire

  1. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  2. Check the class covers the job. A license for one trade doesn't cover another. California license classes
  3. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  4. 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.
  5. 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

  1. Don't sign or pay a deposit until the CSLB shows the license active again.
  2. 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.
  3. If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
  4. Check another contractor. California license lookup

Sources

  1. CSLB License Master (cslb.ca.gov, Oct 28, 2026)
  2. Contractors State License Board (CSLB)