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California contractor license

Plumbing 1 Builder's Inc

Plumbing 1 Builder's Inc of Hayward holds California license 1034873 (B General Building, C36 Plumbing). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Dec 31, 2027.

Licensed 8 years, longer than 56% of 48 active Hayward plumbing contractors.

Active

  • Workers' comp ends Dec 30, 2026 (59 days)

Plumbing 1 Builder's Inc, Hayward

License
1034873
Class
B General Building; C36 Plumbing
Expires
Dec 31, 2027
Bond
$25,000
Workers' comp
Insured to Dec 30, 2026

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
$25,000Western Surety Company, from Dec 14, 2024, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredPacific Compensation Insurance Company, from Dec 30, 2025, to Dec 30, 2026

Who is on this license?

Officer
Adrian Perez-EsquiviazSince Jan 9, 2026
Responsible managing officer, CEO and president
Leonardo F. Cervantes GaytanSince Jan 16, 2018
Responsible managing officer, CEO and president
Victor E. Funes-BolanosSince Aug 1, 2023

What work does this license cover?

Issued Jan 16, 2018. Reissued Dec 14, 2021.

Which other Hayward businesses hold B General Building?

California plumbing contractorsGeneral Contractors in HaywardCalifornia general contractors

What should you check before hiring?

What to ask before you hire

  1. Ask whether it has been renewed. Something on this license ends within 60 days. Check again before you pay a deposit.
  2. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  3. Check the class covers the job. A license for one trade doesn't cover another. California license classes
  4. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  5. 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.
  6. 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, Nov 1, 2026)
  2. Contractors State License Board (CSLB)