| Atascadero Plastering | Atascadero Plastering | — | (805) 610 6318 | Other | Atascadero · San Luis Obispo County | — | — |
| Ati Drywall INC | Christopher Harry Crompe | — | (805) 929 6513 | Other | Nipomo · San Luis Obispo County | — | — |
| Atilius Living Construction | Attilio Raen Turrini-smith | — | (831) 238 0590 | GC, remodel, ADU | San Miguel · San Luis Obispo County | — | — |
| Atkinson Concrete Construction Incorporated | Susan Viola Atkinson | — | (805) 462 2715 | Pool | Atascadero · San Luis Obispo County | — | — |
| Atkinson Engineering INC | Angela Dee Atkinson | — | (805) 423 5933 | Other | Santa Margarita · San Luis Obispo County | — | — |
| Atlas Construction & Remodel | Mark Maurice Kellenbarger | — | (805) 975 7131 | GC, remodel, ADU | Los Osos · San Luis Obispo County | — | — |
| Atwood Framing & Rough Carpentry | Atwood Framing & Rough Carpentry | — | (805) 674 3755 | Other | Los Osos · San Luis Obispo County | — | — |
| Atz Painting | Atz Painting | — | (714) 595 6808 | Windows, patio, painters | Atascadero · San Luis Obispo County | — | — |
| Au | Jonathan Lee Avrett | — | (805) 441 5877 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Auhltimate Electric | Timothy Raymond Auhll | — | (805) 878 2777 | Electricians | Nipomo · San Luis Obispo County | — | — |
| Austin Building Services | Christopher Pardee Austin | — | (805) 806 0088 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Austin Elsworth Bonjour | Austin Elsworth Bonjour | — | (805) 835 2313 | Other | Templeton · San Luis Obispo County | — | — |
| Austin Powell | Austin Powell | — | (805) 806 0195 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Autumn Landscapes | Autumn Landscapes | — | (805) 550 1670 | Windows, patio, painters | Grover Beach · San Luis Obispo County | — | — |
| Auzco Development LLC | Hamish Scott Marshall | — | (805) 592 1110 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Av Dirtworks LLC | Joseph Anthony Duran | — | (805) 835 7201 | Other | Paso Robles · San Luis Obispo County | — | — |
| Available Plumbing Services | Maldonado Richard | — | (805) 462 8006 | Other | Templeton · San Luis Obispo County | — | — |
| Avalon Painting INC | Juan Ramon Gutierrez | — | (805) 674 5034 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Avenridge HVAC Repair San Luis Obispo | Avenridge HVAC Repair San Luis Obispo | — | (805) 360-6456 | HVAC | San Luis Obispo · San Luis Obispo County | — | — |
| Avg Plumbing INC | Andrew Vance Greene | avgplumbinginc247@gmail.com | (805) 296 2646 | Other | Pismo Beach · San Luis Obispo County | — | — |
| Avid Trails LLC | James Anthony Hoeschler | info@avidtrails.com | (310) 779 1271 | Windows, patio, painters | San Luis Obispo · San Luis Obispo County | — | — |
| Avila Cabinetry And Millwork | Avila Cabinetry And Millwork | — | (805) 674 7786 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Avila Contractors LLC | Micheal Ernest Jr Avila | — | (805) 365 5003 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Avina Construction | Jorge Ivan Avina | — | (805) 210 0083 | GC, remodel, ADU | Cambria · San Luis Obispo County | — | — |
| Axiom 360 LLC | Brandon Kyle Hoffman | — | (805) 840 2161 | Other roofers | Grover Beach · San Luis Obispo County | — | — |
| Ayers Construction LLC | Ronald Eugene Ayers | — | (805) 674 9638 | GC, remodel, ADU | Templeton · San Luis Obispo County | — | — |
| Aztec Lawn Care INC | Marcos Antonio Jimenez Ramirez | — | (805) 975 5629 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Azteca Builders | Jacob Emanuel Sanchez | — | (805) 748 5742 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| B & B Concrete Construction | Bruce Irl Bergstrom | — | (805) 550 6911 | Other | Grover Beach · San Luis Obispo County | — | — |
| B & B Construction Clean Up INC | Michael Francis Brunick | bbconstcleanup@gmail.com | (805) 489 1819 | Other | Nipomo · San Luis Obispo County | — | — |
| B & B Overhead Door INC | Casey Alex Pozdolski | — | (805) 528 4283 | Other | Los Osos · San Luis Obispo County | — | — |
| B & T Construction INC | Theodore Eldebechel Wolff | — | (805) 235 2891 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| B - Pac | Thomas Howard Stanton | — | (805) 286 6785 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| B C Construction & Electric | Bryan Neal Carlson | — | (805) 748 9586 | Electricians | Morro Bay · San Luis Obispo County | — | — |
| B C S | B C S | — | (805) 431 0589 | GC, remodel, ADU | Grover Beach · San Luis Obispo County | — | — |
| B D C Development Corporation | Eron Jesse Loughead | — | (805) 773 7990 | GC, remodel, ADU | Pismo Beach · San Luis Obispo County | — | — |
| B E B Builders | B E B Builders | — | (805) 215 8572 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| B H Painting | B H Painting | — | (805) 550 0892 | Windows, patio, painters | Los Osos · San Luis Obispo County | — | — |
| B Hirsch Plumbing | B Hirsch Plumbing | — | (805) 700 1611 | Other | Grover Beach · San Luis Obispo County | — | — |
| B J Harvey Construction INC | Brian Joseph Harvey | — | (805) 440 5931 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |