| Nunez Concrete INC | Eduardo Natividad Nunez | name@msm.com | (530) 558 0779 | Windows, patio, painters | El Dorado · El Dorado County | — | — |
| O'sullivan Construction | Dennis Michael O'sullivan | — | (916) 605 6596 | GC, remodel, ADU | El Dorado Hills · El Dorado County | — | — |
| Oak Alarm Co | Michael Dunning Jr Rich | — | (408) 395 2324 | Electricians | Shingle Springs · El Dorado County | — | — |
| Oak Creek Construction | Jaime Ruben Gutierrez | — | (530) 306 7572 | GC, remodel, ADU | Cameron Park · El Dorado County | — | — |
| Oak Hills Plumbing | Oak Hills Plumbing | — | (916) 277 5864 | Other | Shingle Springs · El Dorado County | — | — |
| Oakley General Engineering | James Jacob Oakley | — | (530) 957 4478 | Other | Placerville · El Dorado County | — | — |
| Odin Systems INC | Michael Lee Saylor | contact@odinsystems.com | (866) 748 3174 | Electricians | Diamond Springs · El Dorado County | — | — |
| Offsite Utilities INC | Jesse D'amato | — | (916) 370 3345 | Other | Shingle Springs · El Dorado County | — | — |
| Old World Timber Works | Old World Timber Works | — | (206) 650 0717 | GC, remodel, ADU | South Lake Tahoe · El Dorado County | — | — |
| Olivcon General Building Contractor | Olivcon General Building Contractor | — | (916) 275 3075 | GC, remodel, ADU | El Dorado Hills · El Dorado County | — | — |
| Olympeak Construction | Pavel Koltsov | — | (916) 713 9026 | GC, remodel, ADU | Placerville · El Dorado County | — | — |
| On - Site Welding And Equipment Repair | Daniel Henry Blandford | — | (805) 556 2407 | Other | El Dorado Hills · El Dorado County | — | — |
| On The Level Construction INC | Thomas Vincent Hau | — | (530) 577 7888 | GC, remodel, ADU | South Lake Tahoe · El Dorado County | — | — |
| On-site Equipment INC | Robert Findleton | — | (530) 545 0899 | Other | Diamond Springs · El Dorado County | — | — |
| Osborn Stair Construction | Kennett Arthur Osborn | — | (530) 622 0551 | GC, remodel, ADU | El Dorado · El Dorado County | — | — |
| Outdoor Lighting Perspectives Of Sierra Foothills | Lawrence Albert Velasco | — | (916) 249 3999 | Electricians | Cameron Park · El Dorado County | — | — |
| Overstreet Tile & Stone | Overstreet Tile & Stone | — | (916) 616 0776 | Other | Shingle Springs · El Dorado County | — | — |
| Owens Plumbing | Owens Plumbing | — | (530) 209 6835 | Other | Somerset · El Dorado County | — | — |
| P Bruce Booher Construction | Peter Bruce Booher | — | (916) 201 6819 | Electricians | Placerville · El Dorado County | — | — |
| P G K Services | Paul Gene Komarchuk | — | (916) 439 7792 | GC, remodel, ADU | El Dorado Hills · El Dorado County | — | — |
| P H I Construction | Dennis Barton Paddock | — | (530) 906 8918 | GC, remodel, ADU | Diamond Springs · El Dorado County | — | — |
| P J Plumbing | P J Plumbing | — | (916) 709 6935 | Other | El Dorado Hills · El Dorado County | — | — |
| P K Construction | Paul Warren King | — | (916) 591 5917 | GC, remodel, ADU | Shingle Springs · El Dorado County | — | — |
| Pac West Elevator INC | Joseph Aaron Speel | info@pacwestelevator.com | (530) 672 6789 | Electricians | Shingle Springs · El Dorado County | — | — |
| Pacific Electric | Martin Ray Radekin | — | (530) 577 0907 | Electricians | South Lake Tahoe · El Dorado County | — | — |
| Pacific Fencing | Vincent Neal Roselli | — | (916) 767 6929 | Other | El Dorado Hills · El Dorado County | — | — |
| Pacific Performance Drywall INC | Frank Avery Neeley | — | (530) 957 6827 | Other | Shingle Springs · El Dorado County | — | — |
| Pacific Performance Enterprise INC | Peter Simon Gutkowski | — | (530) 748 5299 | GC, remodel, ADU | Shingle Springs · El Dorado County | — | — |
| Pacific Plot Tree & Brush Service | Todd Jonathan Morine | — | (530) 318 8920 | Other | Placerville · El Dorado County | — | — |
| Pacific Rim Construction LLC | Sukhvir Singh Thind | — | (916) 430 7801 | GC, remodel, ADU | El Dorado Hills · El Dorado County | — | — |
| Pacific West Construction | Adam Christopher Stupek | — | (530) 417 7704 | GC, remodel, ADU | Placerville · El Dorado County | — | — |
| Pack Rat Demolition | Pack Rat Demolition | — | (530) 416 2018 | Other | South Lake Tahoe · El Dorado County | — | — |
| Padilla Landscaping | Padilla Landscaping | — | (530) 651 6147 | Windows, patio, painters | Cameron Park · El Dorado County | — | — |
| Paint Maintenance Co | Richard Waring Horrell | — | (530) 903 0121 | Windows, patio, painters | Diamond Springs · El Dorado County | — | — |
| Painting Contractors INC | Michael Joseph Schneeweis | — | (530) 544 6722 | Windows, patio, painters | South Lake Tahoe · El Dorado County | — | — |
| Painting Solutions | Painting Solutions | — | (206) 240 7547 | Windows, patio, painters | South Lake Tahoe · El Dorado County | — | — |
| Pancho's Landscaping Services | Francisco Javier Gonzalez | — | (808) 308 7060 | Windows, patio, painters | Placerville · El Dorado County | — | — |
| Paradise Painting By Tim Reynders | Paradise Painting By Tim Reynders | — | (916) 804 0995 | Windows, patio, painters | Pollock Pines · El Dorado County | — | — |
| Paradise Woodworks | Paradise Woodworks | create@paradisewoodworks.com | (808) 767-1725 | GC, remodel, ADU | South Lake Tahoe · El Dorado County | — | — |
| Paradyme Builders | Paradyme Builders | — | (530) 906 7760 | GC, remodel, ADU | Placerville · El Dorado County | — | — |