Updated: Apr 29, 2026
Location and Projects
Headquarters Address
Grants Pass, OR, 97528
Local address
P O BOX 9331, Mammoth Lakes, CA, 93546
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Plumbing Masters
Plumbing Masters, Mammoth Lks, Po Box 9331, Mammoth Lakes, CA (Employees: David Lopez, David Lopez, and Eric Keith Hermansen) holds a Plumbing license and 3 other licenses according to the California license board.
Their BuildZoom score of 98 ranks in the top 16% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Plumbing Masters, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Plumbing Masters Services
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Plumbing Masters Contact Information
Phone Number: (541) 972-0595
Edit
Headquarters Address: Grants Pass, OR, 97528
Local Address: P O BOX 9331, Mammoth Lakes, CA 93546
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Responsible for disconnecting all water supply lines on any equipment that is being relocated/removed in affected areas. responsible for ensuring all relocated equipment (post mix slurpy open air cases etc.) have proper drains
Valuation:
N/A
Permit #:
21042-10000-05773
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Responsible for disconnecting all water supply lines on any equipment that is being relocated removed in affected areas. responsible for installing booster pump (gc provided) in predetermined location. responsible for ensuring all relocated equipment has proper drains
Valuation:
N/A
Permit #:
21042-30000-05852
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Install new grease interceptor for a 3 compartment sink. we will tie into exisitng sewer line. vent lines for grease trap to be ran through the roof comply with department order effective date 09/08/2004
Valuation:
N/A
Permit #:
21042-10000-53056
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Installing new grease trap for existing 3-compartment sink wmp req'd loa in file
Valuation:
N/A
Permit #:
2025-1865
Status:
issued
Fee:
$245
Permit Type:
N/A
Building Type:
N/A
Installing new grease trap for 3 compartment sink. per the applicant the project is approved by the los angeles county health department and city of los angeles bureau of sanitation
Valuation:
N/A
Permit #:
20042-10000-11498
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
1 floor drains/sinks 1 all other fixtures 1 floor drains/sinks 1 all other fixtures 1 back flow device 1 repipe
Valuation:
N/A
Permit #:
21042-10000-05735
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
1 floor drain/sinks 1 all other fixture 1 floor drains/sinks 1 all other fixtures 1 back flow device 1 repipe
Valuation:
N/A
Permit #:
21042-10000-05714
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
1 floor drains 1 all other fixtures 1 floor drains 1 all other fixtures 1 back flow device 1 repipe
Valuation:
N/A
Permit #:
21042-10000-05699
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Kearny mesa: plumbing permit for an existing walmart. proposed work to install 4 three inch floor sinks in claims department
Valuation:
N/A
Permit #:
2368495
Status:
complete
Fee:
$306
Permit Type:
N/A
Building Type:
N/A
Checking equipment and plumbing
Valuation:
N/A
Permit #:
21042-10000-83051
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Permit to install (2) sewer cleanouts on existing sewer - line for a commercial site
Valuation:
N/A
Permit #:
BLD19-005012
Status:
final
Fee:
$158
Permit Type:
Commercial
Building Type:
N/A
Pacific beach plumbing permit to install grease trap for extg convenience store
Valuation:
N/A
Permit #:
2055425
Status:
complete
Fee:
$254
Permit Type:
N/A
Building Type:
N/A
Pacific beach: plumbingpermit for installing grease trep in an (e) store
Valuation:
N/A
Permit #:
2046961
Status:
complete
Fee:
$274
Permit Type:
N/A
Building Type:
N/A
Relocate 3 floor sinks in existing 7-eleven
Valuation:
N/A
Permit #:
BLD-21-00660
Status:
complete
Fee:
$116
Permit Type:
N/A
Building Type:
N/A
Install 40 gallon water heater
Valuation:
$1,545
Permit #:
201906503
Status:
complete
Fee:
$237
Permit Type:
Water heater permit
Building Type:
N/A
Gas test
Valuation:
N/A
Permit #:
2023-1892
Status:
final
Fee:
$234
Permit Type:
N/A
Building Type:
N/A
Plubming permit-replace hand sink & raised elr sink
Valuation:
N/A
Permit #:
1992921
Status:
complete
Fee:
$114
Permit Type:
N/A
Building Type:
N/A
Responsible for disconnecting all water supply lines on any equipment that is being relocated/removed in affected areas. (example) under coffee bar or boh) responsible for ensuring all relocated equipment (post mix slurpy open air cases etc.) have proper drains
Valuation:
N/A
Permit #:
21042-10000-06787
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
3 comparable sink mop sink and water heater del taco
Valuation:
$119,519
Permit #:
BPL160220
Status:
APPLIED
Fee:
$424
Permit Type:
N/A
Building Type:
N/A
Plumbing permit with plans for the installation of a new ground mounted 50 gal grease trap for an existing 7-11 store.
Valuation:
N/A
Permit #:
1324970
Status:
complete
Fee:
$169
Permit Type:
N/A
Building Type:
N/A
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Plumbing Masters License info
Verified License
| License # | 470265 |
| Status | Active |
| State | California |
| Type | Plumbing |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Plumbing Masters at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 781743 |
| Status | Active |
| State | California |
| Type | Plumbing |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Plumbing Masters at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PM33 |
| Status | Inactive |
| State | Oregon |
| Type | Combo License |
| Business Type | Sole Ownership |
- According to the Oregon Building Codes Division, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Plumbing Masters at the Oregon Building Codes Division.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 734115 |
| Status | Inactive |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning, Plumbing |
| Business Type | Sole Ownership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Plumbing Masters at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
98
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
761
Permits
- Building permit records show that Plumbing Masters has worked on 761 permitted projects.
Plumbing Masters Employees
DL
David Lopez
Sole Owner
DL
David Lopez
Sole Owner
EH
Eric Keith Hermansen
Sole Owner
RM
Richard George Markland
Rme