Best Licensed Plumbers in Sunnyvale, CA
33 plumbing companies registered in Sunnyvale hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by workers' compensation cover and years licensed.
How we chose: We identified 33 companies registered in Sunnyvale. 33 passed license verification. The 8 below are the top-ranked of those. Our methodology
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- ✓ CSLB License #427328 - look up this number at CSLBInsured - REPUBLIC INDEMNITY COMPANY OF AMERICABonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 1982
- Phone
- (408) 734-3569
- ✓ CSLB License #734942 - look up this number at CSLBInsured - NORGUARD INSURANCE COMPANYBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 1997
- Phone
- (408) 593-6146
- ✓ CSLB License #757196 - look up this number at CSLBInsured - TECHNOLOGY INSURANCE COMPANY INCBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 1998
- Phone
- (650) 796-5836
- ✓ CSLB License #801323 - look up this number at CSLBInsured - NORGUARD INSURANCE COMPANYBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 2001
- Phone
- (408) 738-8878
- ✓ CSLB License #814302 - look up this number at CSLBInsured - OAK RIVER INSURANCE COMPANYBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 2002
- Phone
- (408) 747-0276
- ✓ CSLB License #890650 - look up this number at CSLBInsured - HARTFORD CASUALTY INSURANCE COMPANYBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 2007
- Phone
- (408) 455-3752
- ✓ CSLB License #951887 - look up this number at CSLBInsured - AMTRUST INSURANCE COMPANYBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 2010
- Phone
- (408) 502-0932
- ✓ CSLB License #969133 - look up this number at CSLBInsured - CONTINENTAL CASUALTY COMPANYBonded - $25,000
- Verified
- August 17, 2026
- Licensed since
- 2012
- Phone
- (408) 835-3339
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Backflow Prevention Specialists Inc. | #427328 | On file | 1982 |
| Washburn Construction Inc. | #734942 | On file | 1997 |
| Pascal Engineering Inc. | #757196 | On file | 1998 |
| A & A Plumbing | #801323 | On file | 2001 |
| Roger K Olsen Inc. DBA California Waterscape | #814302 | On file | 2002 |
| Maan Plumbing Inc. | #890650 | On file | 2007 |