| Arborguard | Jonathan Clarke Godman | — | (916) 585 6013 | Other | Foresthill · Placer County | — | — |
| Arc Energy Electric LLC | Bradley Michael Simmons | — | (916) 741 7017 | Electricians | Loomis · Placer County | — | — |
| Arc Heating And Air Conditioning | Vitaliy Vasilyevich Ivanov | — | (916) 540 0123 | HVAC | Roseville · Placer County | — | — |
| Arcade Builders INC | Sergei Vladimir Mysin | — | (916) 292 5757 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Arcadian Fence | Arcadian Fence | — | (530) 368 0317 | Other | Colfax · Placer County | — | — |
| Arcado's Plumbing INC | David Michael Jr Arcado | darcado@att.net | (707) 486 6687 | Other | Roseville · Placer County | — | — |
| Arci Floors | Arci Floors | — | (530) 305 5431 | Other | Granite Bay · Placer County | — | — |
| Argueta Construction | Jose Andres Argueta Argueta | arguetaconstructioninc@gmail.com | (530) 401 4290 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Aries Electric | John Robert Kilgour | — | (916) 716 5747 | Electricians | Auburn · Placer County | — | — |
| Ark's Electric | Shmorgon Arkady | — | (209) 996 5481 | Electricians | Roseville · Placer County | — | — |
| Armoured Plumbing | Barry Dean Arnold | danielle@armouredplumbing.com | (916) 782 8133 | Other | Roseville · Placer County | — | — |
| Armstrong Chiropractic INC DBA All Seasons Landscape | Scott D Armstrong | — | (916) 791 7313 | Windows, patio, painters | Granite Bay · Placer County | — | — |
| Armstrong Landscape Services INC | Brandon Neil Armstrong | — | (916) 412 3977 | Windows, patio, painters | Rocklin · Placer County | — | — |
| Armstrong Sierra | Armstrong Sierra | — | (916) 792 7488 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Aronson Industries INC | Levi Wayne Aronson | — | (916) 243 9350 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Art Gomez Construction | Arthur Guadalupe Gomez | — | (916) 607 6881 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| Art Melick Construction | Arthur Louis Melick | — | (916) 548 3028 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Art Michel General Contractor | Art Michel General Contractor | — | (530) 559 4802 | GC, remodel, ADU | Applegate · Placer County | — | — |
| Artemio's Landscape INC | Artemio Munoz | — | (530) 414 1461 | Windows, patio, painters | Tahoe City · Placer County | — | — |
| Artisan Building Contractor | Artisan Building Contractor | — | (916) 751 8086 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Artisan Construction | Paul Thomas Barmettler | — | (530) 525 1905 | GC, remodel, ADU | Tahoma · Placer County | — | — |
| Artisan Construction | Walter Bruno Cavenecia | — | (916) 767 5090 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Artistic Impressions Concrete | Artistic Impressions Concrete | micah@micahrich.com | (916) 501 3347 | Other | Roseville · Placer County | — | — |
| Artistic Iron | Artistic Iron | contact@artisticiron.com | (916) 276 5126 | Other | Auburn · Placer County | — | — |
| Artistic Life | Yingji Wu | — | (916) 886 1936 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| Artistic Tile Designs | Artistic Tile Designs | — | (916) 223 6247 | Other | Newcastle · Placer County | — | — |
| Artragous Painting | Artragous Painting | — | (916) 969 2222 | Windows, patio, painters | Roseville · Placer County | — | — |
| Arx Group INC | Veronica Colfescu | — | (916) 833 2998 | GC, remodel, ADU | Roseville · Placer County | — | — |
| As Carpentry INC | Sobolev Andrei | — | (916) 595 3010 | Electricians | Roseville · Placer County | — | — |
| As Construction INC | Vitaliy Skots | — | (916) 289 8007 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Asbury Building Company | Daniel Wayne Asbury | asburybuilding@gmail.com | (916) 297 5816 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Ash Construction | Wayne Douglas Ii Ash | ashconstructionservicesuk@gmail.com | (530) 401 3438 | GC, remodel, ADU | Newcastle · Placer County | — | — |
| Ashby Communications INC | Patric Brian Ii Ashby | — | (916) 774 0808 | Other | Roseville · Placer County | — | — |
| Aslan Electric | Aaron Nogueda | — | (916) 696 4234 | Electricians | Loomis · Placer County | — | — |
| Aspen Grove Landscape | Aspen Grove Landscape | — | (530) 546 6166 | Windows, patio, painters | Tahoe Vista · Placer County | — | — |
| Aspen Home Improvements | Aspen Home Improvements | — | (530) 308 4720 | Electricians | Kings Beach · Placer County | — | — |
| Asphalt Aces | Donna Marie Floros | — | (209) 200 7612 | Other | Roseville · Placer County | — | — |
| Asphalt Consultants & Contractors INC | Mark Gregory Jouras | — | (916) 435 5070 | Other | Rocklin · Placer County | — | — |
| Astra Construction & Design | Pavel A Naydenko | — | (916) 910 8911 | GC, remodel, ADU | Loomis · Placer County | — | — |
| Astra Spaces | Pavel A Naydenko | — | (916) 910 8911 | GC, remodel, ADU | Loomis · Placer County | — | — |