| Pryor Contractors | Ignacio Zocca | — | (925) 783 1114 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Pterodactyl Construction Co INC | Jed Alan Linsley | — | (707) 953 4614 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Pumpman Norcal | Jason Robert Smith | — | (707) 584 9191 | Electricians | Santa Rosa · Sonoma County | — | — |
| Pure Heart Redwood Renovations | Donald Wayne Jr Martin | — | (415) 302 0835 | GC, remodel, ADU | Rohnert Park · Sonoma County | — | — |
| Pure Homeriver Property Management Of California | Pure Homeriver Property Management Of California | — | (707) 524-8380 | Property managers | Santa Rosa · Sonoma County | — | — |
| Pure Power Solutions | Rody Richard Jonas | sales@purepowersolutions.com | (707) 433 6556 | Electricians | Healdsburg · Sonoma County | — | — |
| Purtell Construction | James Edward Purtell | — | (707) 321 1536 | GC, remodel, ADU | Sonoma · Sonoma County | — | — |
| Pyramid Construction | Dennis Michael Bolen | — | (443) 615-3303 | GC, remodel, ADU | Rohnert Park · Sonoma County | — | — |
| Qualified Builders Construction | Christopher Arredondo | — | (707) 303 5844 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Quality & Precision Construction INC | Julio Cesar Molina Martinez | — | (707) 393 0804 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Quality Awning | Quality Awning | — | (707) 322 6290 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Quality Builders And Renovation INC | Ordaz Jesus Garcia | — | (707) 292 4597 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Quality Craftsmen Construction INC | Daniel Albor Ramirez | — | (707) 540 3354 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| Quality Flooring Center INC | Elaine Mary Harper | — | (707) 763 9663 | Other | Petaluma · Sonoma County | — | — |
| Quality Plastering | Quality Plastering | qualityplasterllc@gmail.com | (707) 935 7461 | Other | Sonoma · Sonoma County | — | — |
| Quantum Mechanical Of Sonoma County INC | Gregory Scott Quackenbush | — | (707) 479 6950 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Questa Environmental Design | Margaret Henderson Peters | — | (707) 484 6826 | Windows, patio, painters | Penngrove · Sonoma County | — | — |
| Quinn Nielsen | Quinn Nielsen | — | (707) 486 9842 | GC, remodel, ADU | Cloverdale · Sonoma County | — | — |
| Quinn's California Landscapes INC | Quinn Payton Walt | — | (415) 246 2380 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| Quintanar Low Voltage Solutions | Quintanar Low Voltage Solutions | — | (661) 437 9137 | Other | Santa Rosa · Sonoma County | — | — |
| R & J Bros Construction | Peralta Raul Cuevas | — | (707) 241 5130 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| R & S Erection Of Santa Rosa Incorporated | John Paul Jones | — | (707) 585 0892 | Other | Cotati · Sonoma County | — | — |
| R A C General Construction & Drywall Services | Roberto Antonio Castillo | — | (415) 312 3088 | GC, remodel, ADU | Sonoma · Sonoma County | — | — |
| R A H Construction | Robert Alan Holt | — | (707) 484 5348 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| R A Howard Construction | Russell Albert Howard | — | (707) 799 9640 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| R A K Plumbing | R A K Plumbing | — | (707) 710 5563 | Other | Santa Rosa · Sonoma County | — | — |
| R A M C O | R A M C O | — | (707) 332 6999 | Other | Rohnert Park · Sonoma County | — | — |
| R A M Construction | Remberto Alexander Canales Majano | — | (707) 293 4739 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| R A Newkirk Co | Robert Arthur Newkirk | — | (707) 396 3631 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| R A Wilson Construction Corp | Robert Alan Wilson | — | (707) 938 7377 | GC, remodel, ADU | Sonoma · Sonoma County | — | — |
| R B Construction & Remodel | Rigoberto Valencia Barragan | — | (707) 478 5853 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| R B Contracting & Son | Randy Lee Brattin | — | (707) 894 9065 | GC, remodel, ADU | Cloverdale · Sonoma County | — | — |
| R Bruins INC | Ralph Dennis Bruinsslot | — | (415) 246 3555 | GC, remodel, ADU | Occidental · Sonoma County | — | — |
| R C Cabinets & Closets | Christopher William Hall | — | (855) 572 2227 | Other | Cotati · Sonoma County | — | — |
| R C Construction | Robbin William Cummins | — | (707) 578 0360 | Other | Windsor · Sonoma County | — | — |
| R C Custom Painting | R C Custom Painting | — | (707) 494 6144 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| R C Electric | Ronald Alan Cox | — | (707) 484 4565 | Electricians | Santa Rosa · Sonoma County | — | — |
| R C Holman General Construction | Robert Conrad Holman | — | (707) 484 2075 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| R C X INC | Thomas Michael Swegle | — | (707) 539 5069 | Other | Windsor · Sonoma County | — | — |
| R Clarke & Sons | R Clarke & Sons | — | (707) 481 9499 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |