| Pro Energy Scaffold Services | Arthur Joseph Cruz | — | (925) 667 8046 | Other | Point Richmond · Contra Costa County | — | — |
| Pro M Tree Service | Zerimar Alvarado | promtreeservice@outlook.com | (925) 826 8529 | Tree | Antioch · Contra Costa County | — | — |
| Pro Plumbing And Rooter LLC | Juan Jose Rosales | — | (510) 943 8336 | GC, remodel, ADU | Antioch · Contra Costa County | — | — |
| Pro Plumbing Services | Bryan Elliott Shetler | — | (925) 706 8694 | Other | Antioch · Contra Costa County | — | — |
| Pro Pol Flooring | Pro Pol Flooring | — | (925) 642 3850 | Other | Brentwood · Contra Costa County | — | — |
| Pro-active HVAC Incorporated | Hayward Alphonso Jr Calhoun | — | (510) 693 6943 | HVAC | San Pablo · Contra Costa County | — | — |
| Pro-coat Painting | Pro-coat Painting | — | (925) 705 1166 | Windows, patio, painters | Lafayette · Contra Costa County | — | — |
| Pro-construction | Iram Santiago Martinez | proconstruction17@yahoo.com | (925) 437 6298 | GC, remodel, ADU | Pittsburg · Contra Costa County | — | — |
| Proair Solution Corp | Tovar Diego Leal | — | (925) 565 3994 | HVAC | Pittsburg · Contra Costa County | — | — |
| Probox Demolition INC | Divino Cicero Sr Borges De Oliveira | — | (925) 304 3380 | Other | Martinez · Contra Costa County | — | — |
| Probuilt LLC | Brody James Obrien | — | (925) 381 0697 | GC, remodel, ADU | Clayton · Contra Costa County | — | — |
| Prodigy Works | Prodigy Works | — | (925) 917 9520 | Windows, patio, painters | Bay Point · Contra Costa County | — | — |
| Production Engineering & Construction INC | James Ryan Ewing | — | (925) 876 9991 | Other | Brentwood · Contra Costa County | — | — |
| Production Excavating | Production Excavating | — | (925) 575 0255 | Other | Danville · Contra Costa County | — | — |
| Proedge Landscape INC | Peter Joseph Schultz | jjacobo@proedge1.com | (925) 265 7545 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Professional Coatings | Professional Coatings | — | (510) 384 2633 | Windows, patio, painters | Pittsburg · Contra Costa County | — | — |
| Professional Electric Contractors INC | Gene Brandan Simoni | — | (925) 642 2997 | Electricians | Danville · Contra Costa County | — | — |
| Professional Flooring And Design INC | Mitchell Carl Moore | — | (925) 671 2556 | Other | Concord · Contra Costa County | — | — |
| Professional Landscape Management | Alejandre Jesus Flores | — | (925) 820 9364 | Windows, patio, painters | Martinez · Contra Costa County | — | — |
| Professional Window Covering Installers | Professional Window Covering Installers | — | (925) 550 7078 | Other | Discovery Bay · Contra Costa County | — | — |
| Professor Playground INC | Warren Michael Sealock | — | (925) 726 3269 | Other | Pleasant Hill · Contra Costa County | — | — |
| Proficient Termite And Construction Co | Jessie Randolph Jr Ivey | — | (510) 222 9199 | GC, remodel, ADU | Pinole · Contra Costa County | — | — |
| Progreso Construction | Joseph Anthony Piscitelli | — | (925) 262 3699 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Progreso Painting | Hugo Enrique Hernandez | — | (510) 691 6621 | Windows, patio, painters | Hercules · Contra Costa County | — | — |
| Prohomedirect INC | Siarhei Shauchuk | — | (781) 975 2084 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Projat Solutions | Projat Solutions | — | (925) 800 3636 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Promodeling INC | Guy Zelig Oren | — | (888) 222 8553 | GC, remodel, ADU | El Cerrito · Contra Costa County | — | — |
| Prompt Plumbing Services | Pablo Alfonso Boteo | — | (415) 786 3114 | Other | San Pablo · Contra Costa County | — | — |
| Propac Construction | Jose Ernesto Pacheco Morales | — | (925) 223 7304 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| Property Maintenance Painting & Construction | Chad Anthony Banuelos | — | (510) 791 8800 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Prorenovating | Marian Kostka | — | (510) 512 4880 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Proscape | Matthew Robert Lane | — | (925) 934 1146 | Windows, patio, painters | Walnut Creek · Contra Costa County | — | — |
| Prosiding INC | Ralph Gerard Austin | — | (925) 295 9827 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Prospect Engineering INC | Marcus Michael Tobin | — | (925) 476 5383 | Other | Walnut Creek · Contra Costa County | — | — |
| Prospective Construction Services | Abdul Haleem Haleemi | — | (510) 631 4334 | GC, remodel, ADU | Bay Point · Contra Costa County | — | — |
| Prostone World INC | Catalin Vasile Gavrila | — | (925) 594 1660 | Other | Clayton · Contra Costa County | — | — |
| Protech Painting Company | Brian Hansen De Loache | — | (510) 253 6795 | Windows, patio, painters | San Ramon · Contra Costa County | — | — |
| Protek Co INC | Damen Thaddeus Nikolakakis | — | (925) 705 5280 | GC, remodel, ADU | Pleasant Hill · Contra Costa County | — | — |
| Providence Development Corporation | Corliss Suen Lee | — | (925) 289 9288 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Providence Water Heaters INC | Anthony Andreas Achermann | providencewaterheaters@gmail.com | (925) 232-8639 | Other | Walnut Creek · Contra Costa County | — | — |