| Professional Design & Construction | David Joseph Miklovic | — | (805) 674 4002 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Professional Home Inspection Services | Gary Leon Vreeken | — | (805) 462 1978 | Electricians | Atascadero · San Luis Obispo County | — | — |
| Professional Services Construction INC | William John Zolg | — | (949) 635 6700 | Other roofers | Santa Margarita · San Luis Obispo County | — | — |
| Progressive Greenery | Progressive Greenery | — | (805) 238 9461 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Project Management Group | Thomas Howard Stanton | — | (805) 481 6322 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Protec Security Alarm System | Protec Security Alarm System | — | (805) 474-0182 | Alarm and generators | Grover Beach · San Luis Obispo County | — | — |
| Protectpro Security Solutions | Protectpro Security Solutions | — | (805) 459-1258 | Alarm and generators | Grover Beach · San Luis Obispo County | — | — |
| Provins Flooring | Provins Flooring | — | (619) 964 6430 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Pruitt Construction | Daniel Gainard Pruitt | — | (805) 441 8210 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Psn Plumbing INC | Paulo Stanford Sena | — | (805) 770 0390 | HVAC | San Luis Obispo · San Luis Obispo County | — | — |
| Pure Energy Electrical INC | James Leroy Linnenkamp | admin@pureenergyelectrical.com.au | (805) 235 8506 | Electricians | Paso Robles · San Luis Obispo County | — | — |
| Pw White HVAC | Pw White HVAC | — | (805) 801 6852 | HVAC | Arroyo Grande · San Luis Obispo County | — | — |
| Pyzer Construction Services LLC | Rick Earl Pyzer | — | (805) 792 2850 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Q 4 Services | Allan Neil Quist | — | (805) 748 3936 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Quaglino Roofing | James Alexander Quaglino | — | (805) 543 0560 | Other roofers | San Luis Obispo · San Luis Obispo County | — | — |
| Quaglino's Flooring INC | Patrick Philip Quaglino | — | (805) 541 1646 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Quality | Austin Craig Cook | sales@qualitytintingandsigns.com | (805) 541 5533 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Quality Painting And Maintenance | Quality Painting And Maintenance | — | (805) 423 1811 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Quality Tile Co | Shirley Diana Gibson | — | (805) 550 2888 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Quaresma Drywall INC | Brian Thomas Quaresma | — | (805) 459 5960 | Other | Nipomo · San Luis Obispo County | — | — |
| Quincon INC | Jose Castillo Quintana | — | (805) 574 1660 | GC, remodel, ADU | Grover Beach · San Luis Obispo County | — | — |
| R & B Construction Incorporated | Richard William Dale | — | (805) 331 4517 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| R & S Electric | Robert Scott Rucker | ryan@rselectric.com | (805) 462 9166 | Electricians | Atascadero · San Luis Obispo County | — | — |
| R & S General Contracting | Rudy Manuel Zachar | — | (805) 904 4994 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| R & S Whitson INC DBA R W Construction | Thomas Andrew Baer | — | (805) 238 6467 | Electricians | Paso Robles · San Luis Obispo County | — | — |
| R A Martinez & Son Const | Richard Arthur Jr Martinez | — | (805) 801 8726 | GC, remodel, ADU | Los Osos · San Luis Obispo County | — | — |
| R A W Roofing | Robert Allen Williamson | — | (805) 467 5400 | Other roofers | Paso Robles · San Luis Obispo County | — | — |
| R Andrew Pollin | R Andrew Pollin | — | (619) 972 6400 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| R B Construction | Robert Mitchell Boneso | — | (805) 238 0075 | HVAC | Paso Robles · San Luis Obispo County | — | — |
| R Baker INC | Roger Scot Baker | — | (805) 489 8711 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| R Burke Corporation | Kathryn Anne Burke | rburkeartist@gmail.com | (805) 543 8568 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| R C B | Fred E Contractor Harpster | — | (805) 459 7709 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| R C M Building Systems | R C M Building Systems | rcm@rcmbuildingsystems.com | (805) 235 6146 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| R C Parriott Design And Construction | Raymond Craig Parriott | — | (805) 801 0770 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| R C Plumbing | R C Plumbing | randy@rcplumbing.com | (805) 909 1397 | Other | Paso Robles · San Luis Obispo County | — | — |
| R Cameron Construction | Russell Duncan Cameron | — | (805) 481 9711 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| R Cox Construction | Rick Bryan Cox | — | (805) 296 0419 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| R D Norrington | R D Norrington | — | (805) 458 5034 | Windows, patio, painters | Los Osos · San Luis Obispo County | — | — |
| R D Rangel | R D Rangel | — | (805) 331 2668 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| R E Marti Construction | Rafael Edward Marti | — | (805) 235 3651 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |