Home / License lookup / California / Roser D John Inc
California contractor license
Roser D John Inc
Roser D John Inc of Westlake Village holds California license 506778 (A General Engineering, ASB Asbestos Certification, B General Building, C8 Concrete, C10 Electrical, C12 Earthwork and Paving, C13 Fencing, C27 Landscaping, C36 Plumbing). The CSLB file dated Oct 30, 2026 lists it as active.1 It expires Mar 31, 2027.
Licensed 39 years, longer than 84% of 25 active Westlake Village electrical contractors.
Active
Roser D John Inc, Westlake Village
- License
- 506778
- Class
- A General Engineering; ASB Asbestos Certification; B General Building; C8 Concrete; C10 Electrical; C12 Earthwork and Paving; C13 Fencing; C27 Landscaping; C36 Plumbing
- Expires
- Mar 31, 2027
- Bond
- $25,000
- Workers' comp
- Insured to Jul 1, 2027
CSLB file dated Oct 30, 2026
From the CSLB file dated Oct 30, 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 30, 2026. Confirm with the board: CSLB license check
What bond, insurance and workers' comp are on file?
- Bond
- $25,000American Contractors Indemnity Company, from Jan 1, 2023, continuous
- Liability insurance
- Not in the CSLB fileCheck with the board
- Workers' comp
- InsuredState Compensation Insurance Fund, from Jul 1, 1993, to Jul 1, 2027
Who is on this license?
- Officer
- Natalie A. RoserSince Feb 9, 2001
- Responsible managing officer, CEO and president
- Donald J. RoserSince Mar 9, 1987
What work does this license cover?
Issued Mar 9, 1987.
- A General Engineering
- ASB Asbestos Certification
- B General Building
- C8 Concrete
- C10 Electrical
- C12 Earthwork and Paving
- C13 Fencing
- C27 Landscaping
- C36 Plumbing
Which other Westlake Village businesses hold A General Engineering?
- Recycled Base Materials IncLicensed since 1978
- Whitehawk Construction IncLicensed since 1982
- MC Coy Dennis M & Sons IncLicensed since 1994
- Holwick Constructors IncLicensed since 1999
- Parking Structure Builders IncLicensed since 1999
California electrical contractorsCalifornia plumbing 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 30, 2026)
- Contractors State License Board (CSLB)