| Process Gas And Water Piping | David Thomas Andres | — | (209) 815 1042 | Other | Turlock · Stanislaus County | — | — |
| Professional Carpet And Vinyl Installation | Professional Carpet And Vinyl Installation | — | (209) 613 6086 | Other | Keyes · Stanislaus County | — | — |
| Professional Chimney & Venting Services | Robert Wayne Lehr | — | (209) 892 2933 | Other | Patterson · Stanislaus County | — | — |
| Professional Tree Service U S A | Martinez Federico | — | (209) 968 4039 | Tree | Riverbank · Stanislaus County | — | — |
| Prouty Construction Services INC | Preston Hunter Prouty | — | (209) 568 9909 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Prozone Contractors INC | Juan Manuel Gonzalez | build@prozonecontractors.com | (209) 678 7850 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Pump Pros INC | Michael Glenn Thomas | — | (209) 250 0530 | Other | Ceres · Stanislaus County | — | — |
| Pure Water Pool Service | Roam Bradley Dunn | — | (209) 883 2288 | Pool | Hughson · Stanislaus County | — | — |
| Pursley's Window Coverings INC | Daniel Wayne Pursley | — | (209) 668 3700 | Other | Turlock · Stanislaus County | — | — |
| Pyle Legacy Floors | Pyle Legacy Floors | — | (209) 483 2699 | Other | Modesto · Stanislaus County | — | — |
| Q's Green Valley INC | Maria Guadalupe Quirarte Gomez | — | (209) 818 6463 | Windows, patio, painters | Newman · Stanislaus County | — | — |
| Qc Quality Control INC DBA Qc Concrete | Ernesto Aguilar Hernandez | — | (925) 409 6680 | Other | Newman · Stanislaus County | — | — |
| Quad Automation | Joseph Patrick Zapien | — | (209) 893 8483 | Electricians | Ceres · Stanislaus County | — | — |
| Qualitech Electrical Services INC | Jhesse Nino Yumul Santos | jsantos@qualitechelectricalservices.com | (408) 623 4658 | Electricians | Patterson · Stanislaus County | — | — |
| Quality Construction | Santiago Geronimo Cornejo Cervantes | — | (209) 992 7941 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Quality Construction Building INC | Thomas Rein Groen | — | (209) 614 5048 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Quality Design Electric | Aaron Joseph Davis | — | (209) 765 4726 | Electricians | Waterford · Stanislaus County | — | — |
| Quality Garage Door Company | Randal James Stambaugh | — | (209) 551 2955 | Other | Modesto · Stanislaus County | — | — |
| Quality Roofing INC | Aldana Federico Joaquin | — | (209) 814 9902 | Other roofers | Patterson · Stanislaus County | — | — |
| Quality Scaffolding INC | Robert Dean Ii Bagley | — | (209) 845 0964 | Other | Oakdale · Stanislaus County | — | — |
| Quality Turns LLC | Braulio Alfredo Juarez Higuera | — | (650) 776 5460 | GC, remodel, ADU | Riverbank · Stanislaus County | — | — |
| Quality Wise Painting INC | Gutierrez Nestor | — | (209) 849 5272 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Quantum Innovation Construction INC | Lance Edward Donaldson | — | (209) 667 6574 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Quantum Technology INC | Lance Edward Donaldson | — | (209) 667 6574 | Electricians | Turlock · Stanislaus County | — | — |
| Quintero Construction | Hipolito G Quintero | — | (209) 300 1500 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Quintero General Construction | Quintero Gustavo | — | (209) 662 2000 | GC, remodel, ADU | Patterson · Stanislaus County | — | — |
| R & D Tree Service | Eric Roberto Hernandez | — | (209) 634 8863 | Windows, patio, painters | Denair · Stanislaus County | — | — |
| R & K Automatic Gate & Access | Jenni Rebecca Collins | — | (209) 847 7800 | Other | Oakdale · Stanislaus County | — | — |
| R & M Pipelines INC | Enrique Alvarez Mendoza | — | (209) 479 3550 | Other | Waterford · Stanislaus County | — | — |
| R & S Erection Tri-county INC | Gerald Trask | — | (209) 526 8760 | Other | Modesto · Stanislaus County | — | — |
| R A Custom Finishes INC | Raul Aguilera | — | (209) 404 5267 | Windows, patio, painters | Patterson · Stanislaus County | — | — |
| R A D Traffic Control INC | Ricardo Rodriguez Cano | — | (209) 990 4515 | Other | Modesto · Stanislaus County | — | — |
| R A M Construction | Rocco Anthony Mustaca | — | (209) 613 4094 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| R A Muller Construction | Robert Arthur Muller | — | (209) 602 1822 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| R B Construction | George Gilbert | — | (209) 222 6161 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| R B G Construction INC | Gilbert George | — | (209) 222 6161 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| R B M Remodeling Co | Rudolph Paul Bueno | — | (209) 534 6626 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| R C Plumbing | R C Plumbing | randy@rcplumbing.com | (209) 863 8751 | Other | Modesto · Stanislaus County | — | — |
| R D G Construction | Duran Gonzalez Ricardo | — | (408) 230 3670 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| R Galvan Company | Galvan Rigoberto | — | (209) 595 4722 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |