| Ams Pro Plumbing | Arreola Mario Murillo | — | (408) 218 9549 | Other | Modesto · Stanislaus County | — | — |
| Analito U Rama | Analito U Rama | — | (209) 567 2026 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Anaya Elite Renovation & Construction INC | Jose Marcos Anaya Larios | — | (925) 765 3267 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Anchor Glass Windows And Doors | Anchor Glass Windows And Doors | — | (209) 505 1293 | Windows, patio, painters | Oakdale · Stanislaus County | — | — |
| Andalon Construction | Roberto Lomeli Andalon | — | (209) 595 2485 | GC, remodel, ADU | Riverbank · Stanislaus County | — | — |
| Anderson Tree Experts INC | Samuel Ray Anderson | — | (209) 845 8710 | Tree | Oakdale · Stanislaus County | — | — |
| Anderson-litfin INC | Chandler Tyler Anderson | — | (209) 667 4141 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Andrade's Air | Andrade's Air | — | (209) 602 8946 | HVAC | Modesto · Stanislaus County | — | — |
| Andrade's Plumbing | Omar Jesus Nevarez-andrade | — | (209) 828 6600 | Other | Ceres · Stanislaus County | — | — |
| Andrew Bolt | Andrew Bolt | — | (209) 404 1746 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Andrew Electric | Luke Thomas Andrew | — | (209) 552 6552 | Electricians | Modesto · Stanislaus County | — | — |
| Andrew Welch | Andrew Welch | — | (209) 499 2200 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Andrews Roofing | John Garner Andrews | — | (209) 863 1068 | Other roofers | Oakdale · Stanislaus County | — | — |
| Andy Souza Masonry | Andy Souza Masonry | — | (209) 648 1164 | Other | Turlock · Stanislaus County | — | — |
| Angel's Glass And Windows Co | Yepez Ubaldo | — | (209) 247 4501 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Angelo Rovedatti | Angelo Rovedatti | — | (209) 996 3088 | GC, remodel, ADU | Crows Landing · Stanislaus County | — | — |
| Anna Christine Jordan DBA Signs Your Way | Signs Your Way | — | (209) 576 8787 | Other | Ceres · Stanislaus County | — | — |
| Anthony J Barro Iii Structural Steel | Anthony Joseph Iii Barro | — | (209) 538 7474 | Other | Ceres · Stanislaus County | — | — |
| Antigua Pools | Antigua Pools | — | (209) 324 5827 | Windows, patio, painters | Turlock · Stanislaus County | — | — |
| Antoni Rashidzadeh Fred's Painting | Antoni Rashidzadeh Fred's Painting | — | (209) 552 6465 | Windows, patio, painters | Turlock · Stanislaus County | — | — |
| Anvil Construction | Rafael Mendez-Lara | — | (209) 996 0926 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Apex Plumbing Solutions INC | Mark Antonio Williams | — | (209) 420 7424 | Other | Modesto · Stanislaus County | — | — |
| Apollo Construction | Curtis James Ellis | — | (408) 364 5179 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Apollo Drain & Rooter Service | John Gerrit Boer | — | (209) 523 3727 | Other | Modesto · Stanislaus County | — | — |
| Applegate Septic & Sewer | Applegate Septic & Sewer | greg@applegatesepticsewer.com | (209) 575 4531 | Other | Modesto · Stanislaus County | — | — |
| Applied Power Systems INC | Brian Kevin Elkins | — | (209) 595 2399 | Electricians | Riverbank · Stanislaus County | — | — |
| Aqua Clear Pool Service And Repair | Ralph William Kahler | — | (209) 845 2225 | Pool | Oakdale · Stanislaus County | — | — |
| Ar Ag Serv LLC | Alexander Eduardo Santiago | — | (209) 678 7880 | Other | Turlock · Stanislaus County | — | — |
| Aragon Construction | Sabino Miguel Aragon | info@aragonconstruction.com | (209) 968 0547 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Arambula Appliance Installation INC | Gutierrez Pedro Arambula | — | (209) 568 8318 | Other | Ceres · Stanislaus County | — | — |
| Arana's Construction | Arana Felix Everardo | — | (209) 605 3085 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Araz Electric INC | Azari Hameed | — | (408) 661 3410 | Electricians | Patterson · Stanislaus County | — | — |
| Arbor Green Tree Service | Amador Denise | — | (209) 499 3178 | Tree | Modesto · Stanislaus County | — | — |
| Arborn Tree Care | Arborn Tree Care | — | (209) 409 5767 | Tree | Ceres · Stanislaus County | — | — |
| Archibeque Custom Stucco | Archibeque Custom Stucco | — | (209) 551 3606 | Other | Modesto · Stanislaus County | — | — |
| Archibeque's Flooring | Archibeque's Flooring | — | (408) 726 4184 | Other | Modesto · Stanislaus County | — | — |
| Ardel Builders INC | Edwin William Arvizu Delgado | — | (209) 247 3265 | GC, remodel, ADU | Riverbank · Stanislaus County | — | — |
| Areco Building Construction INC | Chiquete Cuitlahuac Arellano | — | (209) 450 1052 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Arellano Construction Solution INC | Magallon Everardo Arellano | everardoarellano1983@icloud.com | (209) 568 2296 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Aria General Building | Aria General Building | — | (209) 416 6755 | Electricians | Turlock · Stanislaus County | — | — |