| Adam Construction | Ross Francis Adam | — | (530) 277 2570 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Adam Kremple Construction | Adam Robert Kremple | — | (530) 913 6582 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Adams Construction Enterprises | Ronald Scott Adams | — | (530) 582 1763 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Addington Tile Works | Addington Tile Works | — | (530) 312 8684 | Other | Grass Valley · Nevada County | — | — |
| Advanced Asphalt | Jerry Todd Bellon | — | (530) 582 0800 | Other | Truckee · Nevada County | — | — |
| Advanced Construction And Development | Carl Salvatore Balistreri | — | (408) 799 5912 | GC, remodel, ADU | Nevada City · Nevada County | — | — |
| Advanced Design Construction | James Ferris Chakedis | — | (530) 277 4538 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Advanced Mechanical | Advanced Mechanical | — | (530) 263 2520 | Other | Grass Valley · Nevada County | — | — |
| Advanced Plumbing | Advanced Plumbing | — | (530) 557 5450 | Other | Nevada City · Nevada County | — | — |
| Advanced Roofing Solutions | Troy Louis Gill | — | (530) 550 1521 | Other roofers | Truckee · Nevada County | — | — |
| Advantage Garage Door Co | Ross Martin Hermann | — | (530) 274 3667 | Other | Grass Valley · Nevada County | — | — |
| Advantage Gutter Systems | Advantage Gutter Systems | — | (530) 277 8555 | Other | Grass Valley · Nevada County | — | — |
| Advantage Painting INC | Matthew Alan Holden | — | (209) 602 4897 | Windows, patio, painters | Nevada City · Nevada County | — | — |
| Ae Construction & Remodeling INC | Stephen John Muerle | — | (530) 564 2656 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Aero Ducks Heating And Air Conditioning | Michael Charles Phillips | — | (530) 919 6959 | HVAC | Truckee · Nevada County | — | — |
| Agape Systems INC | James William Pocock | — | (530) 798 8622 | Electricians | Grass Valley · Nevada County | — | — |
| Agua Fria Landscape | Alyssa Rae Maldonado | info@indiantypefoundry.com | (530) 906 4772 | Windows, patio, painters | Grass Valley · Nevada County | — | — |
| Air Wolf Energy Efficiency Systems | Air Wolf Energy Efficiency Systems | — | (530) 790 0925 | HVAC | Penn Valley · Nevada County | — | — |
| Al Pombo INC | Alfred James Pombo | office.alpombo@gmail.com | (530) 587 4112 | Other | Truckee · Nevada County | — | — |
| Alder Creek Builders | Shawn Lee Burgess | — | (530) 414 1403 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Alderman Drywall | Alderman Drywall | — | (530) 913 6299 | Other | Nevada City · Nevada County | — | — |
| Alex Your Roofer & Gutter Guy | Pozos Alejandro | — | (530) 557 7866 | Other roofers | Grass Valley · Nevada County | — | — |
| All Access Home Lift Company | Eric Matthew Kapp | info@allaccesshomelift.com | (530) 320 2315 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| All Around Electric | Michael Andrew Tackaberry | mike@allaroundelectric.com | (530) 277 0511 | Electricians | Grass Valley · Nevada County | — | — |
| All Concepts Construction | Tyler William Miller | — | (530) 263 6182 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| All Good Plumbing And Drains | Brian Keith Reilly | — | (530) 264 7474 | Other | Nevada City · Nevada County | — | — |
| All Out Pergolas | Adam Guy Ermolenko | — | (279) 244 8251 | Other | Grass Valley · Nevada County | — | — |
| All Phase Excavating Service INC | Vincent Lloyd Cheney | — | (707) 974 3266 | Other | Penn Valley · Nevada County | — | — |
| All Phase Heating And Air Conditioning INC | Max Don Bennett | — | (530) 274 9955 | HVAC | Grass Valley · Nevada County | — | — |
| All Phase Land Clearing INC | Troy Alfred Sidebottom | allphaselandclearing@gmail.com | (530) 265 3867 | Tree | Grass Valley · Nevada County | — | — |
| All Seasons | All Seasons | — | (530) 587 4839 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| All Star Painting Kd INC | Roman Demin | — | (916) 218 2455 | Windows, patio, painters | Grass Valley · Nevada County | — | — |
| Alpen Tree Experts | Ryan Michael Kramer | — | (530) 448 1194 | Tree | Truckee · Nevada County | — | — |
| Alpenglow Construction | Jacob Nicholas Resnikoff | — | (530) 388 8001 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Alpenglow Construction Company | Alex James Rankow | — | (530) 414 9550 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Alpha And Omega Drywall | Alpha And Omega Drywall | — | (530) 308 0679 | Other | Truckee · Nevada County | — | — |
| Alpine Builder | Alpine Builder | — | (775) 741 8085 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Alpine Concrete And Pumping INC | Tyson Andrew Valcalda | — | (530) 401 4570 | Other | Truckee · Nevada County | — | — |
| Alpine Crest Construction INC | James Garren Roth | — | (925) 858 3236 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Alpine Electric | Mark Adam Buzzard | — | (530) 583 3000 | Electricians | Truckee · Nevada County | — | — |