| Aspeotis Construction INC | Thomas Andrew Aspeotis | — | (916) 381 5443 | GC, remodel, ADU | Sacramento · Sacramento County | — | — |
| Asphalt Impressions INC | Stephan Eugene Biondi | — | (916) 383 0441 | Other | Sacramento · Sacramento County | — | — |
| Aspire Painting INC | Chance Christopher Denton | — | (800) 510 5902 | Windows, patio, painters | Sacramento · Sacramento County | — | — |
| Assad Mansoori Moayed | Assad Mansoori Moayed | — | (916) 212 9808 | GC, remodel, ADU | Folsom · Sacramento County | — | — |
| Assets Only Construction | Milan Ninkovic | — | (510) 922 0135 | GC, remodel, ADU | Sacramento · Sacramento County | — | — |
| Assurance Construction | Dan Manuel Fotos | — | (916) 997 4614 | Other roofers | Carmichael · Sacramento County | — | — |
| Astral Electric Company | Jacob Daniel Elliott | — | (209) 712 9597 | Electricians | Galt · Sacramento County | — | — |
| Astro Painting And Decorating | Jiri Weinhauer | — | (916) 349 1314 | Windows, patio, painters | Antelope · Sacramento County | — | — |
| Astro Painting INC | Daniel Armando Rodriguez Ochoa | — | (916) 508 3227 | Windows, patio, painters | Sacramento · Sacramento County | — | — |
| Astro Security Monitoring | Troy Allen Studer | — | (916) 252 9121 | Alarm and generators | Sacramento · Sacramento County | — | — |
| Asv & Ph Flooring | Asv & Ph Flooring | — | (916) 882 6870 | Other | Sacramento · Sacramento County | — | — |
| At Your Service Home Improvement | David Robert Mc Innes | — | (916) 799 8246 | GC, remodel, ADU | Carmichael · Sacramento County | — | — |
| At&t Datacomm | Victor David Pelayo | — | (916) 606 3034 | Other | Sacramento · Sacramento County | — | — |
| Ata Custom Tile | Patrick Mitchell Brothers | — | (916) 417 8175 | Other | Sacramento · Sacramento County | — | — |
| Atchley Construction | Troy Elliott Atchley | — | (916) 224 9068 | GC, remodel, ADU | Fair Oaks · Sacramento County | — | — |
| Atchley Electrical | Robert Jonathan Atchley | — | (916) 585 6628 | Electricians | Sacramento · Sacramento County | — | — |
| Ate | Harold Hibbard Carr | — | (916) 853 6280 | Electricians | Rancho Cordova · Sacramento County | — | — |
| Atesa Concrete | Atesa Concrete | atesapacific@gmail.com | (916) 757 8913 | Other | Sacramento · Sacramento County | — | — |
| Athens West Builders INC | Dimitrios George Lignos | — | (408) 210 5583 | GC, remodel, ADU | Citrus Heights · Sacramento County | — | — |
| Atlantic Flooring | Atlantic Flooring | — | (720) 327 7427 | Other | Sacramento · Sacramento County | — | — |
| Atlantic H V A C INC | Kanwardeep Singh| Singh Kanwardeep Bhullar | — | (916) 743 7096 | HVAC | Elk Grove · Sacramento County | — | — |
| Atlantic Pool And Spas | Atlantic Pool And Spas | — | (916) 495 3307 | Pool | Sacramento · Sacramento County | — | — |
| Atlantis Diving & Salvage Company | Gary Lynn Borton | — | (916) 692 8004 | Other | Carmichael · Sacramento County | — | — |
| Atlas Fence | Atlas Fence | — | (916) 223 2425 | Other | Citrus Heights · Sacramento County | — | — |
| Atlas Field Services INC | Walter Lee Chenoweth | — | (916) 988 7100 | Other | Orangevale · Sacramento County | — | — |
| Atlas Kitchen & Bath | Zabetian Steve | — | (916) 638 7100 | GC, remodel, ADU | Rancho Cordova · Sacramento County | — | — |
| Atlas Mobile Home Service INC | Thomas Patrick Smith | — | (916) 289 0381 | Other | Citrus Heights · Sacramento County | — | — |
| Atlas Painting Co | Liakopoulos Athanasios | — | (916) 922 6807 | Windows, patio, painters | Sacramento · Sacramento County | — | — |
| Atlas Plumbing Incorporated | William Roy Loftus | — | (916) 539 1059 | Other | Citrus Heights · Sacramento County | — | — |
| Atlas Retail Services INC | Aaron Ararat Davitian | — | (760) 214 7442 | GC, remodel, ADU | Sacramento · Sacramento County | — | — |
| Atlas Shower Door Co | Steven Kenneth Emburg | — | (916) 641 6718 | Windows, patio, painters | Sacramento · Sacramento County | — | — |
| Atlas Tech Service | Christopher Lee Moat | — | (530) 644 1000 | Electricians | Orangevale · Sacramento County | — | — |
| Atm Electric INC | Movsesyan Artak | atmelectric@yahoo.com | (916) 595 1381 | Electricians | Fair Oaks · Sacramento County | — | — |
| Atma Construction INC | Vasile Rilea | atmaconstruction2025@gmail.com | (916) 879 7693 | GC, remodel, ADU | Antelope · Sacramento County | — | — |
| Ato Floors | Ato Floors | — | (916) 500 2028 | Other | Carmichael · Sacramento County | — | — |
| Atom Construction | Thomas Ingraham Scatchard | tom@atom-construction.com | (916) 425 7888 | GC, remodel, ADU | Sacramento · Sacramento County | — | — |
| Ats Welding & Fabrication | Ats Welding & Fabrication | — | (916) 833 7043 | Other | North Highlands · Sacramento County | — | — |
| Attaboy Garage Door & Repair | Attaboy Garage Door & Repair | — | (916) 213 6418 | Other | Wilton · Sacramento County | — | — |
| Atticman Heating & Air Conditioning Insulation INC | Mario Arturo Ray Lopez | — | (916) 520 9566 | HVAC | Sacramento · Sacramento County | — | — |
| Atticman Heating And Air Conditioning Insulation | Atticman Heating And Air Conditioning Insulation | — | (916) 818-1194 | HVAC | Sacramento · Sacramento County | — | — |