Contractors in DIAMOND BAR, CA

291 licensed · 12 trades · Last verified 2026-08-31

DIAMOND BAR, California has 291 contractors with a current state license as of 2026-08-31. The most listed trades here are electrical & lighting, hvac, plumbing. Each listing is verified against California CSLB records and shows its license number and expiry date.

Trades in this city

Electrical & Lighting

Painting & Drywall

Landscaping & Hardscaping

Roofing & Gutters

Concrete, Masonry & Driveways

Kitchen & Bath Remodeling

Insulation & Weatherization

Windows & Doors

Solar & Energy Upgrades

General Builder

Nearby

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License data from state licensing authorities, refreshed on each state’s own schedule; every listing names the register it came from. Place data © OpenStreetMap contributors, ODbL. Nothing here is purchased, estimated, or user-submitted. How we get our data