Public Record · California Contractor

Is Prime Mechanical Service INC licensed, insured & complaint-free in California?

Prime Mechanical Service INC has held an active California contractor license (CSLB #819114, B) for 23 years, with no open enforcement actions on record as of June 27, 2026, according to the California Contractors State License Board (CSLB).

Contractor record · CSLB #819114

Prime Mechanical Service INC

General Building (B) · Livermore, CA
License Active

Active · no open actions

License status is CLEAR with no open enforcement actions on record, per the California Contractors State License Board (CSLB).

As of June 27, 2026CSLB code: CLEARVerify on CSLB
License #
CSLB #819114
Classification
B
General Building (B)
Years licensed
23
since April 23, 2003
Contractor's bond
Active
$25,000
The full dossierRedacted preview
Bond suretywho to file a claim against
Bond number
How to make a bond claim
What “Active · no open actions” means + what to ask
License expiration date
All 5 classifications held
Registered business entity & contact
Dated certificate PDF — emailed with your receipt

Unlock every field above for Prime Mechanical Service INC — including who to file a claim against the $25,000 bond. Delivered as a dated certificate PDF, emailed with your receipt. Public records, not a background check.

$9 · instant PDF · emailed with receipt

Principals on record · CSLB

ESHELMAN JOHN MATTHEWSole Owner · Responsible Managing Officer/Chief Executive Officer/President · Responsible Managing Officer
HASKINS ROBERT LAWRENCEResponsible Managing Officer

Workers’ compensation · CSLB

Leasing Firm, Temp Agency, etc
Carrier
ACE AMERICAN INSURANCE COMPANY
Policy
C73853126
Effective
August 1, 2025
Expires
August 1, 2026

What this record means

How to verify this yourself

Every fact on this page comes from the California Contractors State License Board (CSLB). You can confirm it directly: look up CSLB license #819114 on the official CSLB site. This page is current as of June 27, 2026; the CSLB record is updated continuously.

What the contractor's bond covers

California requires most licensed contractors to carry a $25,000 contractor's bond. It can pay certain claims for license-law violations — it is not insurance for your project and is not a measure of work quality. The CSLB lists the surety and bond number.

What this record does and does not tell you

The California Contractors State License Board (CSLB) tracks license status, classification, bond, and workers'-comp. It does not rate work quality, track general-liability insurance, or collect customer reviews. Use it to confirm the license is real and in good standing, then check references and a written contract separately.

What classification B covers

CSLB #819114 is classified General Building (B). A California contractor is licensed only for the classifications on record; work outside them may fall outside the license. The full classification list is on the official CSLB record.

Common questions

Is Prime Mechanical Service INC licensed in California?

Yes. As of June 27, 2026, the California Contractors State License Board (CSLB) lists Prime Mechanical Service INC with an active contractor license, CSLB #819114 (classification B), in a CLEAR status.

Is Prime Mechanical Service INC insured?

As of June 27, 2026, the California Contractors State License Board (CSLB) shows an active workers'-compensation policy on file for CSLB #819114. This covers workers' comp; it does not by itself confirm general-liability coverage, which the CSLB does not track.

Does Prime Mechanical Service INC have complaints or violations?

As of June 27, 2026, the California Contractors State License Board (CSLB) shows no open enforcement actions, citations, or disciplinary bonds on record for CSLB #819114. The CSLB is the authoritative source for complaint history.

Who runs Prime Mechanical Service INC?

The California Contractors State License Board (CSLB) lists 2 principals on record for CSLB #819114, shown by name and title in the personnel section below.

Is Prime Mechanical Service INC bonded?

As of June 27, 2026, the California Contractors State License Board (CSLB) shows an active contractor's bond on file for CSLB #819114. California requires a $25,000 contractor's bond; it protects against certain license-law violations, not a guarantee of work quality.

How long has Prime Mechanical Service INC been licensed?

The California Contractors State License Board (CSLB) shows CSLB #819114 was first issued on April 23, 2003, about 23 years ago.

Get a free quote from a vetted general building contractor in Livermore.

Comparing options? We can connect you with a licensed, insured general building contractor for a free quote. Optional — the verdict above is already free and never behind a form.

Free · no obligation

This record compiles California Contractors State License Board (CSLB) data — license, insurance, principals, and enforcement — that CSLB publishes across separate pages, current as of June 27, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.