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California contractor license

Mountain Bay Construction Inc

Mountain Bay Construction Inc of Novato holds California license 583372 (A General Engineering, B General Building, C16 Fire Protection, C36 Plumbing). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Dec 31, 2027.

Licensed 36 years, longer than 89% of 29 active Novato plumbing contractors.

Active

Mountain Bay Construction Inc, Novato

License
583372
Class
A General Engineering; B General Building; C16 Fire Protection; C36 Plumbing
Expires
Dec 31, 2027
Bond
$25,000
Workers' comp
Insured to Jan 1, 2027

CSLB file dated Oct 29, 2026

From the CSLB file dated Oct 29, 2026. Not a consumer report; check the board before you hire.

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

Bond
$25,000Merchants Bonding Company (Mutual), from Aug 7, 2025, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredInsurance Company Of The West, from Jan 1, 2026, to Jan 1, 2027

Who is on this license?

Responsible managing officer
Bruce E. BaldwinSince Dec 21, 1989
CEO and president
Peter IwateSince Jan 28, 1994

What work does this license cover?

Issued Dec 21, 1989.

Which other Novato businesses hold A General Engineering?

California plumbing contractorsGeneral Contractors in NovatoCalifornia 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 29, 2026)
  2. Contractors State License Board (CSLB)