| 2 Scorpio Communications | 2 Scorpio Communications | — | (916) 412 2446 | Other | Lincoln · Placer County | — | — |
| 24 Seven Tile | 24 Seven Tile | — | (916) 218 9805 | Other | Roseville · Placer County | — | — |
| 3 D Plumbing | 3 D Plumbing | — | (650) 714 7692 | Other | Auburn · Placer County | — | — |
| 4 Cals Concrete Pumping | 4 Cals Concrete Pumping | — | (916) 548 3283 | Other | Roseville · Placer County | — | — |
| 530 Pipe Flow | 530 Pipe Flow | info@pipeflow.com | (530) 906 1226 | Other | Auburn · Placer County | — | — |
| 5P Iron | 5P Iron | — | (916) 293 1130 | Other | Newcastle · Placer County | — | — |
| 5th Generation Plumbing | 5th Generation Plumbing | — | (916) 470 3132 | Other | Rocklin · Placer County | — | — |
| 9 Elevate | 9 Elevate | — | (916) 607 7663 | Other | Auburn · Placer County | — | — |
| 916 Floors INC | Pavlo Pavliouk | — | (916) 303 3731 | Other | Roseville · Placer County | — | — |
| A 1 Quality Flooring | A 1 Quality Flooring | — | (916) 821 3329 | Other | Rocklin · Placer County | — | — |
| A A Fire Systems INC | Manuel Neftali Valdez Perez | — | (916) 933 0800 | Other | Granite Bay · Placer County | — | — |
| A Better Door Co | Nikitin Sergey | — | (916) 275 7099 | Other | Roseville · Placer County | — | — |
| A C Dike Co | Paul Floyd Mc Clain | — | (916) 645 7747 | Other | Lincoln · Placer County | — | — |
| A D S Flooring A Partnership | Adam David Slaugh | — | (916) 745 1237 | Other | Auburn · Placer County | — | — |
| A Davis Paving Co INC | John Uce | — | (530) 806 3458 | Other | Roseville · Placer County | — | — |
| A J S Sprinkler Landscape INC | Steve Singleton Jr Loe | — | (916) 772 1785 | Other | Roseville · Placer County | — | — |
| A P Plumbing | A P Plumbing | — | (916) 289 7595 | Other | Roseville · Placer County | — | — |
| A R Sunscreens | A R Sunscreens | — | (916) 435 2119 | Other | Rocklin · Placer County | — | — |
| A S Concrete Construction | Silveria Anthony | — | (916) 879 5555 | Other | Foresthill · Placer County | — | — |
| A Sewer Guy Plumbing | A Sewer Guy Plumbing | asewerguy@gmail.com | (530) 313 7923 | Other | Bowman · Placer County | — | — |
| A Star Plumbing | A Star Plumbing | andrey@a-star-plumbing.com | (916) 389 4022 | Other | Roseville · Placer County | — | — |
| A To Z Window Screening & Chimney Sweep INC | Aaron Robert Zambrana | — | (916) 408 2496 | Other | Lincoln · Placer County | — | — |
| A+ Tile & Stone | A+ Tile & Stone | — | (916) 240 0473 | Other | Loomis · Placer County | — | — |
| A-t Counter Tops DBA A-t Tile | Salgado Adrian Gonzalez | — | (916) 622 2729 | Other | Roseville · Placer County | — | — |
| Aa Tree Care LLC | Alberto Mares | — | (916) 918 6836 | Other | Roseville · Placer County | — | — |
| Aaron Richie Fencing | Aaron Richie Fencing | — | (530) 263 4942 | Other | Auburn · Placer County | — | — |
| Aaron's Flooring | Aaron's Flooring | — | (916) 474 0855 | Other | Loomis · Placer County | — | — |
| Aaron's Plumbing | Aaron's Plumbing | — | (916) 280 8790 | Other | Lincoln · Placer County | — | — |
| Ab Concrete Coatings INC | Brian Sean Fenno | — | (530) 823 6869 | Other | Meadow Vista · Placer County | — | — |
| Able Door Company | Martin Guenter Conner | — | (916) 708 1381 | Other | Granite Bay · Placer County | — | — |
| Absolute Rooter And Plumbing INC | Kareem John Haddad | — | (916) 899 0490 | Other | Roseville · Placer County | — | — |
| Aca Flooring | Svetislav Sveto Maletin | — | (916) 899 1199 | Other | Roseville · Placer County | — | — |
| Aceto Tile And Stone | Aceto Tile And Stone | — | (916) 765 7278 | Other | Lincoln · Placer County | — | — |
| Acrylic Technologies INC | James Allen Teague | — | (916) 219 2461 | Other | Roseville · Placer County | — | — |
| Acuna Ornamental Ironworks | Acuna Ornamental Ironworks | — | (916) 289 3313 | Other | Roseville · Placer County | — | — |
| Adrian Mocan Drywall And Texture | Adrian Mocan Drywall And Texture | — | (916) 997 3898 | Other | Roseville · Placer County | — | — |
| Adroit Plumbing | Adroit Plumbing | — | (916) 380 0140 | Other | Roseville · Placer County | — | — |
| Advanced Garage Screens | Advanced Garage Screens | — | (916) 396 0819 | Other | Roseville · Placer County | — | — |
| Advanced Geotechniques INC | Greg Garth Gularte | — | (916) 765 4284 | Other | Rocklin · Placer County | — | — |
| Advanced Leak Detection Services INC | Karen Ann Hamilton | — | (916) 846 5179 | Other | Sheridan · Placer County | — | — |