| American Hmi Insulation | American Hmi Insulation | — | (209) 675 6403 | Other | Dos Palos · Merced County | — | — |
| American Titan Construction | Bobby Jo Colt Maldonado | — | (209) 756 2438 | GC, remodel, ADU | Atwater · Merced County | — | — |
| American Tree Medics INC | Heidi Thomas Britt | — | (209) 303 8729 | Tree | Merced · Merced County | — | — |
| Americore INC | Ryan Marques Cunha | — | (209) 632 5679 | GC, remodel, ADU | Hilmar · Merced County | — | — |
| Amerifab Welding | Mark Anthony Ii Tovar | — | (209) 449 2862 | Other | Merced · Merced County | — | — |
| Amre Construction Clean Up Services | Aguilar Jorge Garcia | — | (209) 678 7242 | Other | Delhi · Merced County | — | — |
| Anaya Concrete | Anaya Concrete | — | (209) 489 5475 | Other | Santa Nella · Merced County | — | — |
| Anderson Tree Service INC | Kenneth James Anderson | andersontreesvc1@gmail.com | (209) 726 9634 | Tree | Merced · Merced County | — | — |
| Anderson's Flooring | Anderson's Flooring | — | (209) 358 2512 | Other | Atwater · Merced County | — | — |
| Andre's | Mendez Andre | — | (209) 358 7071 | GC, remodel, ADU | Atwater · Merced County | — | — |
| Angel's Construction INC | Miguel Angel Mendiola | — | (408) 592 6557 | HVAC | Los Banos · Merced County | — | — |
| Angeles Tree Care INC | Maria De Los Angel Santamaria | — | (408) 649 1950 | Tree | Los Banos · Merced County | — | — |
| Anthony Gomes Electric Service | Anthony Manuel Gomes | — | (209) 826 2444 | Electricians | Los Banos · Merced County | — | — |
| Antonio Valdez Concrete | Antonio Valdez Concrete | — | (209) 276 3767 | Other | Atwater · Merced County | — | — |
| Anytime Glass | Anytime Glass | — | (209) 281 7111 | Windows, patio, painters | Hilmar · Merced County | — | — |
| Anytime Glass Company LLC | Humberto Jr Palafox | — | (209) 281 7111 | Windows, patio, painters | Hilmar · Merced County | — | — |
| Apex Construction Innovations | Joshua Lee Smith | — | (209) 564 9427 | GC, remodel, ADU | Merced · Merced County | — | — |
| Apex Painting | Apex Painting | — | (209) 582 3772 | Windows, patio, painters | Atwater · Merced County | — | — |
| Applegate Construction | Cristobal Jr Leon | — | (209) 676 0552 | HVAC | Atwater · Merced County | — | — |
| Appletree Services INC | Rodriguez Cruz Guadalupe | — | (408) 512 6757 | Tree | Los Banos · Merced County | — | — |
| Applied Electric INC | Dennis William Holmes | — | (209) 277 8436 | Electricians | Stevinson · Merced County | — | — |
| Aqua Supreme | Manuel Mendez | — | (831) 449 4679 | Other | Los Banos · Merced County | — | — |
| Aragon Electric | Dominic Valentino Aragon | — | (408) 591 9813 | Electricians | Atwater · Merced County | — | — |
| Aragon Painting | Aragon Painting | — | (408) 206 5382 | Windows, patio, painters | Atwater · Merced County | — | — |
| Arauz Simple Fence Repair | Arauz Simple Fence Repair | — | (408) 628 9406 | Other | Los Banos · Merced County | — | — |
| Arc Electric | George Edward Ii Mccully | — | (209) 756 5834 | Electricians | Merced · Merced County | — | — |
| Arc Electrical Services | Mario Arturo Ray Lopez | — | (408) 722 5759 | HVAC | Los Banos · Merced County | — | — |
| Armco Roofing | Audy Ross Montgomery | — | (209) 854 6234 | Other roofers | Gustine · Merced County | — | — |
| Arms Air Conditioning & Heating INC | Shelly Duane Jr Haase | — | (209) 357 2994 | HVAC | Atwater · Merced County | — | — |
| Arms Air Conditioning And Heating | Arms Air Conditioning And Heating | — | (209) 357-8199 | HVAC | City Of Atwater · Merced County | — | — |
| Artisan Construction | Byron Michael Price | — | (209) 564 6001 | GC, remodel, ADU | Atwater · Merced County | — | — |
| Ashbaugh Painting | Ashbaugh Painting | — | (209) 585 7824 | Windows, patio, painters | Delhi · Merced County | — | — |
| Aspire Builders INC | Matthew Douglas Cox | — | (209) 617 6588 | GC, remodel, ADU | Snelling · Merced County | — | — |
| Associates Lock And Safe Service | Julia Hope Martinez | — | (209) 722 7944 | Other | Merced · Merced County | — | — |
| Astorga Electrical | Felix Arteaga-Astorga | felixarteaga@astorgaelectrical.com | (209) 875 1209 | Electricians | Atwater · Merced County | — | — |
| Astorga's Builders INC | Nardo Antonio Narvaez | — | (323) 216 9484 | GC, remodel, ADU | Los Banos · Merced County | — | — |
| Atwater Drywall | Atwater Drywall | — | (209) 326 3575 | Other | Atwater · Merced County | — | — |
| Atwater Electric | Patrick Charles Bloed | — | (209) 761 1993 | Electricians | Atwater · Merced County | — | — |
| Atwater Glass | Dean Allen Louis | — | (209) 357 7767 | Windows, patio, painters | Atwater · Merced County | — | — |
| Atwater Metal Fabrication INC | Ian Koakane Hamilton | — | (209) 676 8254 | Other | Atwater · Merced County | — | — |