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Licensed roofing contractors in Diamond Bar
5 contractors with a Diamond Bar mailing address hold an active (CLEAR) CSLB C-39 Roofing license in CSLB's license file dated Oct 20, 2026. 5 of them show a workers' comp policy on file. Get quotes from up to 3 of them →
A stand-alone roofing job calls for a C-39 Roofing license. CSLB requires C-39 licensees to carry workers' compensation even if they have no employees, so check that a policy is on file.
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A Featured spot on this roofing page for Diamond Bar is a paid ad for a License Verified contractor, labeled "Ad" every time. It sits apart from the directory and never changes the order below. From $49/mo. Join the waitlist →
Ad space · openAdvertise here
A Featured spot on this roofing page for Diamond Bar is a paid ad for a License Verified contractor, labeled "Ad" every time. It sits apart from the directory and never changes the order below. From $49/mo. Join the waitlist →
All 5 licensed roofing contractors
Order: A–Z by business name (neutral, stated). Showing 1–5. IMPERIUM ROOFING INC
C-39 · Lic. #1141782 · Diamond Bar 91765
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
KERTLAND ROOFING INC
C-39 · also B · Lic. #510174 · Diamond Bar 91765
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
PARK S ROOFING USA
C-39 · Lic. #1142782 · Diamond Bar 91765
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
SUNSHINE ROOFING INC
C-39 · Lic. #755126 · Diamond Bar 91765
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
THE HOT MOPPER
C-39 · Lic. #978099 · Diamond Bar 91765
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026