ADU CITIES Contractor Directory

Mechanical Insulation Systems

Also listed as: Plumbing Systems West Inc

● Active — license status verified against CSLB public data as of November 6, 2026

☎ Call (909) 794-3823Verify this license at CSLB
CSLB license#992207
ClassificationsB — General Building · C-2 — Insulation and Acoustical · C-36 — Plumbing
Office of record31491 Outer Highway 10
Redlands, CA 92373
Address as listed in the CSLB record — the office of record, not a service-area claim.
Phone (CSLB record)(909) 794-3823
Contractor bond$25,000 — Nationwide Mutual Insurance Company
Workers' comp (CSLB record)Workers' Compensation Insurance — Insurance Company Of The West
Business typeCorporation
License issuedApril 17, 2014
License expiresApril 30, 2028

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Data source: CSLB public records as of November 6, 2026. License status can change at any time — verify live at CSLB before signing a contract.