| Proximity Home Inspection Corporation | Proximity Home Inspection Corporation | fred@proximityhomeinspection.com | (510) 472-1817 | Inspectors | Concord · Contra Costa County | — | — |
| Proyecto Bay Painting | Pena Inocencio Luevano | — | (925) 818 2561 | Windows, patio, painters | Pittsburg · Contra Costa County | — | — |
| Psr West Coast Builders INC | Michael Robert Turgeon | — | (925) 299 0518 | Electricians | Concord · Contra Costa County | — | — |
| Puckett Construction | Ronald Dewayne Puckett | — | (510) 755 8512 | GC, remodel, ADU | Pittsburg · Contra Costa County | — | — |
| Pure Color | Oliver Armando Navarro | — | (430) 400 6929 | Windows, patio, painters | Pinole · Contra Costa County | — | — |
| Pure Electric LLC | Michael John Muha | — | (925) 634 6802 | Electricians | Discovery Bay · Contra Costa County | — | — |
| Pure Pool Solutions Services | Michael Thomas Hennigan | — | (925) 683 3961 | Pool | Danville · Contra Costa County | — | — |
| Pure Water Plumbing | Pure Water Plumbing | — | (925) 238 0754 | Other | Oakley · Contra Costa County | — | — |
| Pureflo INC | Justin Patrick Andrews | — | (925) 516 7000 | Other | Brentwood · Contra Costa County | — | — |
| Purev General Contracting LLC | Baatarchuluu Purev | — | (925) 549-1658 | GC, remodel, ADU | Clayton · Contra Costa County | — | — |
| Puroclean Of Antioch | Curtis Raymond Elowe | — | (818) 970 8511 | Other | Antioch · Contra Costa County | — | — |
| Purple Oak Landscape | Sandoval Carlos Armenta | — | (661) 229 8297 | Windows, patio, painters | Antioch · Contra Costa County | — | — |
| Pythagoras Construction LLC | Luis Enrique Barrios Camejo | — | (925) 446 5386 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Q D M Construction | Quentin Dale Mc Curdy | — | (925) 260 7588 | GC, remodel, ADU | Antioch · Contra Costa County | — | — |
| Q G L INC | Eddie Wayne Jr Abrao | — | (925) 370 9700 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Ql Drain Cleaning & Plumbing LLC | Jean Vladimir Quirarte | — | (925) 381 8273 | Other | Antioch · Contra Costa County | — | — |
| Qlr Electric | Dennis Lynn Fitzwater | dennis@qlrelectric.com | (925) 595 5049 | Electricians | Concord · Contra Costa County | — | — |
| Qps INC General Contractors | Alfredo J Henriquez | — | (925) 387 8076 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Quality Building Techniques INC | Rick Lee Eberhardt | mehedidb@gmail.com | (925) 626 7354 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Quality Built Cabinets | Quality Built Cabinets | glenn@qualitybuiltcabinets.com | (407) 900-6050 | Other | Concord · Contra Costa County | — | — |
| Quality Food Service Construction INC | Abramians Artin Avadisi | — | (925) 212 4655 | Electricians | Concord · Contra Costa County | — | — |
| Quality Painting | Quality Painting | — | (510) 621 4888 | Windows, patio, painters | El Cerrito · Contra Costa County | — | — |
| Quality Painting & Construction | Michael Dean Kelly | — | (510) 882 4199 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Quality Plumbing & Rooter INC | William Antonio Cordova | qualityplumbingca@yahoo.com | (925) 584 1951 | Other | Antioch · Contra Costa County | — | — |
| Quality Pool And Construction INC | Alex Radusin | — | (925) 303 2911 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Quality Pro Plumbing | Quality Pro Plumbing | — | (925) 238 6524 | Other | Antioch · Contra Costa County | — | — |
| Quality Roofing Co INC | Robert Paul Jensen | — | (925) 935 1380 | Other roofers | Pleasant Hill · Contra Costa County | — | — |
| Quality Roofing Services INC | Edgar Josue Franco Fajardo | — | (925) 418 2773 | Other roofers | Antioch · Contra Costa County | — | — |
| Quality Tree Care | Joe Duarte Mattos | — | (925) 689 8733 | Tree | Pleasant Hill · Contra Costa County | — | — |
| Quality Tree Care Arborist & Tree Removal | Quality Tree Care Arborist & Tree Removal | — | (844) 909-5255 | Tree | Pleasant Hill · Contra Costa County | — | — |
| Quality Window Fashions | Quality Window Fashions | — | (925) 354 8777 | Other | San Pablo · Contra Costa County | — | — |
| Qualtech Heating & Cooling | Daniel Joulfred Alvarez | — | (925) 831 2444 | HVAC | Danville · Contra Costa County | — | — |
| Quest Plumbing | Quest Plumbing | — | (415) 377 4512 | Other | Concord · Contra Costa County | — | — |
| Questa Engineering Corporation | Mathew Francis Woll | — | (510) 236 6114 | Other | Point Richmond · Contra Costa County | — | — |
| Quick Solution Pools | Quick Solution Pools | info@quicksolutionpools.com | (925) 316 9402 | Pool | Alamo · Contra Costa County | — | — |
| Quintanilla Builders INC | Niwmar Ivan Quintanilla Milian | — | (510) 322 0746 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Quintero Landscapes | Pablo De Jesus Quintero | — | (510) 230 9563 | Windows, patio, painters | Richmond · Contra Costa County | — | — |
| R & D Welding Company | Richard Edward Jr Pitcher | — | (925) 382 5171 | Other | Pittsburg · Contra Costa County | — | — |
| R & De Construction INC | Sandoval Mauricio Rojas | — | (510) 736 8181 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| R & J Climate Services INC | Rene A Uriarte Aviles | — | (510) 200 1896 | HVAC | Richmond · Contra Costa County | — | — |