Is Triangle Mechanical System licensed, insured & complaint-free in California?
Triangle Mechanical System has held an active California contractor license (CSLB #878141, C20) for 20 years, with no open enforcement actions on record as of June 27, 2026, according to the California Contractors State License Board (CSLB).
Triangle Mechanical System
Active · no open actions
License status is CLEAR with no open enforcement actions on record, per the California Contractors State License Board (CSLB).
- Bond surety — who 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
- Registered business entity & contact
- Dated certificate PDF — emailed with your receipt
Unlock every field above for Triangle Mechanical System — 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.
Principals on record · CSLB
Workers’ compensation · CSLB
- Carrier
- MARKEL INSURANCE COMPANY
- Policy
- MWC0210205
- Effective
- February 3, 2023
- Expires
- February 3, 2027
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 #878141 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 C20 covers
CSLB #878141 is classified Heating & Air Conditioning (C-20). 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 Triangle Mechanical System licensed in California?
Yes. As of June 27, 2026, the California Contractors State License Board (CSLB) lists Triangle Mechanical System with an active contractor license, CSLB #878141 (classification C20), in a CLEAR status.
Is Triangle Mechanical System insured?
As of June 27, 2026, the California Contractors State License Board (CSLB) shows an active workers'-compensation policy on file for CSLB #878141. This covers workers' comp; it does not by itself confirm general-liability coverage, which the CSLB does not track.
Does Triangle Mechanical System 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 #878141. The CSLB is the authoritative source for complaint history.
Who runs Triangle Mechanical System?
The California Contractors State License Board (CSLB) lists Triangle Mechanical System as a sole-owner or single-principal license (CSLB #878141). The named principal is shown in the personnel section below, as recorded by the CSLB.
Is Triangle Mechanical System bonded?
As of June 27, 2026, the California Contractors State License Board (CSLB) shows an active contractor's bond on file for CSLB #878141. California requires a $25,000 contractor's bond; it protects against certain license-law violations, not a guarantee of work quality.
How long has Triangle Mechanical System been licensed?
The California Contractors State License Board (CSLB) shows CSLB #878141 was first issued on May 22, 2006, about 20 years ago.
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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.