| Aaron Richardson Const | Aaron Richardson Const | — | (209) 450 9062 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Aaron Triller | Aaron Triller | — | (209) 303 6284 | Other | Modesto · Stanislaus County | — | — |
| Aaron's Clean - Ups | Aaron's Clean - Ups | — | (209) 988-7467 | Tree | Modesto · Stanislaus County | — | — |
| Aaron's Well Drilling INC | Ron Johns | — | (209) 479 8229 | Other | Denair · Stanislaus County | — | — |
| Ab-rod Tile | Ab-rod Tile | — | (209) 652 9240 | Other | Modesto · Stanislaus County | — | — |
| Abbey Carpet And Interiors | Scott R Larson | — | (209) 847 7656 | Other | Oakdale · Stanislaus County | — | — |
| Abney Carpet Installation INC | Brandy Lee Abney | — | (209) 578 3092 | Other | Modesto · Stanislaus County | — | — |
| Above All Electric | Luis Angel Gonzalez | — | (209) 589 8477 | Electricians | Modesto · Stanislaus County | — | — |
| Above Ground Pool Specialties | Above Ground Pool Specialties | — | (209) 572 3765 | Pool | Modesto · Stanislaus County | — | — |
| Abrams Landscaping INC | Daniel Scott Lucky | — | (209) 422 0000 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Absolute Fire Sprinklers LLC | Jason Christopher Kreisel | — | (925) 580 1926 | Other | Turlock · Stanislaus County | — | — |
| Absolute Tile Co | John Carl Jr Fernandes | — | (209) 569 0806 | Other | Modesto · Stanislaus County | — | — |
| Abundant Metal Works LLC | Acevedo Yael Abundiz | — | (209) 303 8256 | Other | Ceres · Stanislaus County | — | — |
| Ac/dc Heating & Air Conditioning | Ac/dc Heating & Air Conditioning | — | (650) 250 3319 | HVAC | Modesto · Stanislaus County | — | — |
| Aca Remodeling INC | Garcia Ramon Vazquez | — | (209) 581 1691 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Accelerated Construction & Metal LLC | Bruce Charles Elliott | — | (209) 846 7998 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Accelerated Engineering Management INC | Daniel Michael Cotrone | — | (916) 407 2355 | Other | Modesto · Stanislaus County | — | — |
| Accent Tile | Accent Tile | — | (209) 505 0425 | Other | Oakdale · Stanislaus County | — | — |
| Access Electric | Walter Pacheco Resendes | — | (209) 577 1491 | Electricians | Modesto · Stanislaus County | — | — |
| Accesspro Door Solutions | Rene Amilcar Cuellar | — | (209) 605 6947 | Other | Modesto · Stanislaus County | — | — |
| Accurate Sawcutting INC | Mary Elena Machado | — | (209) 632 5010 | Other | Turlock · Stanislaus County | — | — |
| Ace Commercial Plastering INC | Ralph Henry Filippini | — | (209) 531 9030 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Ace Of Concrete | Ace Of Concrete | — | (209) 564 6021 | Other | Modesto · Stanislaus County | — | — |
| Ace Tile And Tadelakt Co | Frank Iii Zavala | — | (209) 620 7112 | Other | Riverbank · Stanislaus County | — | — |
| Acme Construction Company INC | Philip Anthony Mastagni | — | (209) 523 2674 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Acme Electric Co | Randy Stephen Brazil | — | (209) 667 2851 | Electricians | Turlock · Stanislaus County | — | — |
| Acosta & Daughters LLC | Clifford Joel Acosta | — | (209) 872 4815 | Electricians | Oakdale · Stanislaus County | — | — |
| Acosta And Sons INC | Clifford Joel Acosta | — | (209) 322 3181 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Acre Drywall | Acre Drywall | — | (209) 404 2166 | Other | Modesto · Stanislaus County | — | — |
| Active Industrial Contracting INC | Anne Marie Frost | — | (209) 634 5659 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Adams Family Flooring | Adams Family Flooring | — | (209) 499 0296 | Other | Modesto · Stanislaus County | — | — |
| Adams Underground Iii | Adams Underground Iii | — | (209) 485 0092 | Other | Waterford · Stanislaus County | — | — |
| Adan Cortez | Adan Cortez | — | (209) 499 4083 | Other | Patterson · Stanislaus County | — | — |
| Addington Air INC | Jason Alex Addington | addingtonairinc@gmail.com | (209) 876 1724 | HVAC | Patterson · Stanislaus County | — | — |
| Adept Builder INC | Tommy Chongae Jr Yi | — | (408) 254 8557 | GC, remodel, ADU | Patterson · Stanislaus County | — | — |
| Aderholt Drywall | Aderholt Drywall | — | (209) 872 3006 | Other | Modesto · Stanislaus County | — | — |
| Adm Diamond Build INC | Alexander Daniel Ramirez Ramirez | — | (415) 471 9256 | GC, remodel, ADU | Salida · Stanislaus County | — | — |
| Adrian Construction | Donovan George Adrian | info@adrianconstructionca.com | (209) 409 8075 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Adu Coach Construction | Russell Glenn Gerber | aducoachconstruction@gmail.com | (260) 229 0835 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Advanced Core Electric | Amezcua Rogelio | — | (209) 248 5389 | Electricians | Modesto · Stanislaus County | — | — |