Best Licensed Roofers in Ontario, CA
26 roofing companies registered in Ontario hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by years licensed.
How we chose: We identified 26 companies registered in Ontario. 26 passed license verification. The 8 below are the top-ranked of those. Our methodology
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- ✓ CSLB License #419626 - look up this number at CSLBInsured - INSURANCE COMPANY OF THE WESTBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 1982
- Phone
- (909) 947-4601
- ✓ CSLB License #626422 - look up this number at CSLBInsured - STATE COMPENSATION INSURANCE FUNDBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 1991
- Phone
- (909) 802-6925
- ✓ CSLB License #630203 - look up this number at CSLBInsured - STATE COMPENSATION INSURANCE FUNDBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 1991
- Phone
- (909) 996-2981
- ✓ CSLB License #638856 - look up this number at CSLBBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 1992
- Phone
- (909) 460-5900
- ✓ CSLB License #686396 - look up this number at CSLBInsured - STATE COMPENSATION INSURANCE FUNDBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 1994
- Phone
- (909) 949-0397
- ✓ CSLB License #726974 - look up this number at CSLBInsured - INSURANCE COMPANY OF THE WESTBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 1996
- Phone
- (909) 984-2671
- ✓ CSLB License #790460 - look up this number at CSLBInsured - INSURANCE COMPANY OF THE WESTBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 2001
- Phone
- (909) 988-9717
- ✓ CSLB License #810795 - look up this number at CSLBInsured - SUNZ INSURANCE COMPANYBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 2002
- Phone
- (951) 217-2546
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Spec Construction Co Inc. | #419626 | On file | 1982 |
| B & M Roofing Stripping Services | #626422 | On file | 1991 |
| Custom Construction | #630203 | On file | 1991 |
| Emmons Roof Service Inc. | #638856 | Exempt or none on file | 1992 |
| Espinoza Roofing | #686396 | On file | 1994 |
| All - Right Roofing LLC | #726974 | On file | 1996 |