| Pinar Construction Company | Brett Nathaniel Pinar | brettpinar@gmail.com | (707) 834 1975 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Pine House Edible Gardens INC | Leslie Christianne Bennett | inquiries@pinehouseediblegardens.com | (510) 545 2726 | Windows, patio, painters | Eureka · Humboldt County | — | — |
| Piner Glass Company INC DBA Redwood Glass & Windows | John Alan Stephens | — | (707) 726 7900 | Windows, patio, painters | Fortuna · Humboldt County | — | — |
| Plumb Construction | Shawn Michael Thompson | interested@domainmarket.com | (707) 725 4398 | GC, remodel, ADU | Fortuna · Humboldt County | — | — |
| Porter & Sons Painting & Construction INC | Ronald Lee Porter | — | (707) 267 8124 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Poston Construction | Matthew James Poston | — | (707) 496 9541 | GC, remodel, ADU | Mc Kinleyville · Humboldt County | — | — |
| Powell Concrete Pumping | Gerald Lane Powell | — | (707) 445 9006 | Other | Eureka · Humboldt County | — | — |
| Precision Custom A/v | Precision Custom A/v | — | (530) 515 5640 | Electricians | Eureka · Humboldt County | — | — |
| Precision Heating And Air Conditioning LLC | Ben Jacobsen | — | (707) 683 6452 | HVAC | Fortuna · Humboldt County | — | — |
| Prime Point Contracting INC | Ahmad Anthony Nowaid | — | (855) 477 2669 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Primo Drywall And Construction Co | James Estel Stivers | — | (707) 445 3788 | GC, remodel, ADU | Cutten · Humboldt County | — | — |
| Property Development And Management | Frank Alexander Masten | — | (707) 672 9568 | GC, remodel, ADU | Hoopa · Humboldt County | — | — |
| Protrades Construction INC | Gregory Ernest Pierson | — | (707) 268 1810 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Q O T Construction And Painting | Victor John Smith | — | (707) 382 8529 | GC, remodel, ADU | Bayside · Humboldt County | — | — |
| Qmr INC | Nicholas Joseph Reese | — | (707) 481 7279 | Electricians | Mc Kinleyville · Humboldt County | — | — |
| Quartz Valley Construction | Eric Murry Taylor | — | (707) 601 8436 | GC, remodel, ADU | Mc Kinleyville · Humboldt County | — | — |
| R & R Electric | Roddy Charles Robinson | — | (707) 599 8125 | Electricians | Arcata · Humboldt County | — | — |
| R A Construction | Richard Dean Ayer | — | (707) 499 7317 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| R A O Construction Co INC | Kristina Michele Ellsworth | — | (707) 443 2118 | GC, remodel, ADU | Cutten · Humboldt County | — | — |
| R Brown Construction Co | Roger Dale Sr Brown | — | (530) 629 3702 | Other | Willow Creek · Humboldt County | — | — |
| R Brown Construction Company INC | Roger Dale Sr Brown | — | (530) 629 3702 | Tree | Willow Creek · Humboldt County | — | — |
| R Brown Construction Company INC / Roger Brown | R Construction Company INC Brown | — | (530) 629 3702 | Other | Willow Creek · Humboldt County | — | — |
| R E B Co | Robert Michael Edwards | — | (707) 601 0552 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| R G Goolsby Const Services | Robert Gregory Goolsby | — | (707) 822 8871 | GC, remodel, ADU | Arcata · Humboldt County | — | — |
| R G P Construction | Robert Gene Pfannenstiel | — | (707) 498 4266 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| R H Construction | Ryan Joshua Heussler | — | (707) 834 5358 | GC, remodel, ADU | Rio Dell · Humboldt County | — | — |
| R K M Builders INC | Kalib Joseph Manzi | — | (707) 496 0271 | GC, remodel, ADU | Ferndale · Humboldt County | — | — |
| R S Smith Construction | Ricky Stuart Smith | — | (707) 496 8406 | GC, remodel, ADU | Mc Kinleyville · Humboldt County | — | — |
| R-co Builders | Michael Roman Durant | — | (707) 443 2148 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Ramirez Construction Company LLC | Yorick Ramirez-Moreno | — | (707) 382 1265 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Ramos Painting | Ramos Painting | — | (707) 298 1158 | Windows, patio, painters | Eureka · Humboldt County | — | — |
| Ramy Dickinson Construction | Ramy James Dickinson | — | (707) 498 8630 | GC, remodel, ADU | Arcata · Humboldt County | — | — |
| Randy Cox Electric | Randy Allen Cox | — | (707) 630 3941 | Electricians | Mc Kinleyville · Humboldt County | — | — |
| Ray Chisum Construction | Sherbert Raymond Chisum | — | (707) 725 9441 | GC, remodel, ADU | Fortuna · Humboldt County | — | — |
| Ray Wolfe Construction INC | Raymond Merle Wolfe | — | (707) 822 4285 | Electricians | Arcata · Humboldt County | — | — |
| Red Coast Tree Service | Eri J Marroquin | — | (714) 380 2971 | Tree | Fortuna · Humboldt County | — | — |
| Red Eagle Concrete | Jordan Marcus Hickey | — | (707) 298 8247 | Other | Eureka · Humboldt County | — | — |
| Red Fin Residential Construction | Finta Brett | — | (707) 845 4717 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Redwood Coast Inspections | Redwood Coast Inspections | — | (707) 362-1400 | Inspectors | Eureka · Humboldt County | — | — |
| Redwood Coast Plumbing | Anita Delores Scarfia | customersupport@redwoodcoastplumbing.com | (707) 445 1500 | Other | Arcata · Humboldt County | — | — |