| Osiris Engineering | Osiris Engineering | — | (707) 350 7413 | Other | Fort Bragg · Mendocino County | — | — |
| Otilio Tree Service | Espinoza Otilio | — | (707) 357 1088 | Tree | Fort Bragg · Mendocino County | — | — |
| P & G Painting | P & G Painting | — | (707) 272 9435 | Windows, patio, painters | Willits · Mendocino County | — | — |
| P L D Construction | Paul Lawrence De Grange | — | (707) 962 9110 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| Pab Electrical | Phil A Barajas | — | (707) 367 3276 | Electricians | Redwood Valley · Mendocino County | — | — |
| Pacific Home Inspections | Pacific Home Inspections | craig@pacifichomeinspections.com | (503) 320-4005 | Inspectors | Fort Bragg · Mendocino County | — | — |
| Pacific Painting Petey Martinez | Pacific Painting Petey Martinez | — | (707) 357 2540 | Windows, patio, painters | Fort Bragg · Mendocino County | — | — |
| Pacific West Development Co | Stephen Dale Dangler | — | (707) 489 7613 | Electricians | Ukiah · Mendocino County | — | — |
| Pacific Woods Glass | Pacific Woods Glass | contact@pacificwoodsglass.com | (707) 884 9453 | Windows, patio, painters | Gualala · Mendocino County | — | — |
| Paramount Sign Contractors INC | Harold Octave Iii Bainbridge | butch@paramountsigncontractors.com | (707) 485 7555 | Other | Redwood Valley · Mendocino County | — | — |
| Partners Gallery | Partners Gallery | partners@mcn.org | (707) 962-0233 | Windows, patio, painters | Mendocino · Mendocino County | — | — |
| Passenger Construction Corp | Mark Stephen Cederborg | — | (707) 975 3105 | Other | Fort Bragg · Mendocino County | — | — |
| Patrick William Doyle | Patrick William Doyle | — | (707) 367 4509 | Other | Fort Bragg · Mendocino County | — | — |
| Paul Riley Drywall | Paul Riley Drywall | — | (707) 272 6261 | Other | Willits · Mendocino County | — | — |
| Paul Stover Construction | Paul Warren Stover | — | (707) 391 0901 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| Paulson Excavating INC | Bryan Thomas Paulson | paulson@myomnitel.com | (707) 937 0492 | Other | Albion · Mendocino County | — | — |
| Pb General Construction | Peter Ward Boudoures | — | (707) 489 2382 | GC, remodel, ADU | Philo · Mendocino County | — | — |
| Peabody Construction | Jesse Wayne Peabody | — | (530) 736 6405 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| Perez Aaa Construction & Remodel | Perez Armando | — | (818) 389 2358 | GC, remodel, ADU | Covelo · Mendocino County | — | — |
| Peridot Electric | Nathan Dean Coleman | — | (707) 972 7339 | Electricians | Willits · Mendocino County | — | — |
| Perry Gulch General Engineering | Perry Gulch General Engineering | — | (707) 489 3653 | Other | Ukiah · Mendocino County | — | — |
| Pete & Sons' Glass Shop | Jeremiah Brantz Mayer | — | (707) 884 4902 | Windows, patio, painters | Gualala · Mendocino County | — | — |
| Pete Mihelcic | Pete Mihelcic | — | (707) 756 0311 | Other | Willits · Mendocino County | — | — |
| Peterson Welding And Fabrication | Peterson Welding And Fabrication | — | (707) 972 5285 | Other | Ukiah · Mendocino County | — | — |
| Peterson's Painting | Peterson's Painting | — | (707) 972 6120 | Windows, patio, painters | Philo · Mendocino County | — | — |
| Phil Austin Woodworks | Phil Austin Woodworks | — | (707) 485 2800 | Other | Redwood Valley · Mendocino County | — | — |
| Philo Saw Works INC | James Peter Boudoures | jack@philosawworks.com | (707) 895 3668 | GC, remodel, ADU | Philo · Mendocino County | — | — |
| Pine Mountain Construction | Jonathan William Irish | — | (707) 357 7567 | GC, remodel, ADU | Willits · Mendocino County | — | — |
| Pinnacle Built | Pinnacle Built | — | (707) 621 0228 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| Piper Logging & Engineering INC | Robert Henry Piper | — | (707) 489 7923 | Other | Manchester · Mendocino County | — | — |
| Pittman Construction | Charles Bret Pittman | — | (707) 972 0886 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| Plumbline Services INC | John Conner Scroggs | — | (707) 391 5016 | HVAC | Talmage · Mendocino County | — | — |
| Pomilia Civil | Joseph Michael Pomilia | — | (707) 489 2465 | Other | Redwood Valley · Mendocino County | — | — |
| Positive Interior Concepts INC | Peter Joseph Rasmusen | — | (707) 884 3039 | GC, remodel, ADU | Gualala · Mendocino County | — | — |
| Potter Construction | Eugene Thomas Potter | — | (707) 513 5385 | GC, remodel, ADU | Willits · Mendocino County | — | — |
| Potter Construction Services | Plumbing & Mechanical Potter | — | (707) 354 2596 | GC, remodel, ADU | Willits · Mendocino County | — | — |
| Potter Plumbing & Mechanical | Potter Plumbing & Mechanical | — | (707) 354 2596 | Other | Willits · Mendocino County | — | — |
| Potter Valley Turfarm | Potter Valley Turfarm | — | (707) 743 2950 | Windows, patio, painters | Potter Valley · Mendocino County | — | — |
| Pound For Pound Construction | Snyder Forest | — | (707) 357 1719 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| Powers Forestry LLC | Michael Joseph Powers | — | (707) 272 8803 | Windows, patio, painters | Elk · Mendocino County | — | — |