Contractors in Diamond Bar, California

1 listing: roofing contractors (1).

How Do You Find a Licensed Contractor in Diamond Bar, California?

We list 1 contractor in Diamond Bar, from open map data with no license check. California has a statewide contractor license. Ask for the license number, confirm it with the state or city, and get at least two written bids.

Updated November 6, 2026 · Source: OpenStreetMap (downloaded November 6, 2026).

Chino Hills Roofing Pros

2140 Grand Avenue, Diamond Bar

Map listing: license not checkedRoofing Contractors

Before You Hire in Diamond Bar

California has a statewide contractor license. Threshold: $1,000 in labor and materials, or a job needing a permit or extra workers. Read the California license summary, then use the hiring checklist and compare your bids. Your city’s building department can also tell you which permits your job needs.

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