| A L M Landscape Company | Albert Jr Medina | — | (805) 581 9811 | Windows, patio, painters | Nipomo · San Luis Obispo County | — | — |
| A M Construction | Anthony James Miller | — | (408) 603 9700 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| A M Enterprises | Marcos Antonio Cisneros | — | (805) 674 3759 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| A M Wighton And Sons DBA A & J Refrigeration | James Sandborn Pape | — | (805) 543 7458 | HVAC | San Luis Obispo · San Luis Obispo County | — | — |
| A Painting | A Painting | — | (805) 345 9614 | Windows, patio, painters | Grover Beach · San Luis Obispo County | — | — |
| A Perfect Plumbing Solution | A Perfect Plumbing Solution | — | (805) 709 6311 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| A Place To Grow | A Place To Grow | — | (805) 704 1313 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| A R C Co | Lawrence Nicholas Laurie | — | (805) 610 4036 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| A R Fuentes Electrical INC | Ramirez Fuentes Armando | — | (805) 440 6018 | Electricians | Morro Bay · San Luis Obispo County | — | — |
| A Smith Construction | Andrew James Smith | — | (720) 838-5307 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| A T D Window Tinting | Devin Thomas Wayner | — | (805) 239 5887 | Other | Templeton · San Luis Obispo County | — | — |
| A T E C Electric | Edward John Chavarria | — | (805) 929 6087 | Electricians | Nipomo · San Luis Obispo County | — | — |
| A Team Fencing INC | Janel Ryan Armet | — | (805) 238 9165 | Other | Templeton · San Luis Obispo County | — | — |
| A V Gheza INC DBA Bayline Builders | Clayton Anthony Gheza | — | (805) 550 1363 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| A Volcano Construction | Cano Alberto | — | (661) 343 4469 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| A-1 Concrete INC | Mark David Simmons | — | (805) 712 5630 | Other | Atascadero · San Luis Obispo County | — | — |
| A-1 Glass | A-1 Glass | — | (805) 227 6697 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| A-1 Pest Management | A-1 Pest Management | — | (805) 460-7566 | Pest, tile roofs | Atascadero · San Luis Obispo County | — | — |
| A-1 Tree Serv | A-1 Tree Serv | — | (805) 929 2520 | Tree | Nipomo · San Luis Obispo County | — | — |
| A-jay Excavating INC | Jacqueline Ann Dallaire | — | (805) 466 0300 | Other | Atascadero · San Luis Obispo County | — | — |
| A-town Av INC | James William Allen | — | (805) 462 2732 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| A-town Electric | Ryan James Reed | info@atownelectric.com | (805) 296 8765 | Electricians | Atascadero · San Luis Obispo County | — | — |
| A.m. Sun Solar | Salvador Roger Jose Alegre | hello@amsunsolar.com | (805) 772 6786 | Other roofers | Paso Robles · San Luis Obispo County | — | — |
| Aaa Landscaping LLC | Shawn Matthew Sousa | — | (805) 542 9695 | Windows, patio, painters | Grover Beach · San Luis Obispo County | — | — |
| Aaaa Engineering Contracting INC | Jesse Duane Arthurs | — | (805) 952 3995 | Other | Templeton · San Luis Obispo County | — | — |
| Aaaa General Engineering INC | Weston Tyler Arthurs | — | (805) 591 9913 | Other | Atascadero · San Luis Obispo County | — | — |
| Aaron Bailey Construction | Aaron Daniel Bailey | — | (805) 806 8195 | GC, remodel, ADU | Los Osos · San Luis Obispo County | — | — |
| Aaron Burger | Aaron Burger | — | (805) 801 7624 | Windows, patio, painters | San Luis Obispo · San Luis Obispo County | — | — |
| Aaron Henson Electric | Aaron Macay Henson | — | (805) 226 6061 | Electricians | Paso Robles · San Luis Obispo County | — | — |
| Aaron Mills Construction INC DBA Mills Construction | Aaron Forrest Mills | — | (805) 461 9048 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Aaron Peel Construction INC | Aaron Scott Peel | — | (805) 674 4824 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Aaron Stern Landscapes | Aaron Stern Landscapes | — | (805) 459 9304 | Windows, patio, painters | Nipomo · San Luis Obispo County | — | — |
| Aaron Wilson | Aaron Wilson | interested@domainmarket.com | (805) 234 1454 | GC, remodel, ADU | Los Osos · San Luis Obispo County | — | — |
| Abbey Carpet & Floor Of San Luis Obispo | Kalen Loel George | — | (805) 541 5153 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Abbott I Reed INC | Shawn Kelly Reed | makeitright@abbottreedinc.com | (805) 543 7277 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Abington's Concrete | Abington's Concrete | — | (805) 574 3052 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Above & Beyond Cleaning Services INC | Lynnette Ann Morrison | — | (916) 704 9370 | Other | Paso Robles · San Luis Obispo County | — | — |
| Above Grade Automation INC | James Kerrigan Ahern | — | (805) 540 5116 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Above The Grade Heating And Air Conditioning | Martin Lewis Lagomarsino | — | (805) 470 9205 | HVAC | Atascadero · San Luis Obispo County | — | — |
| Abraham Mendez Construction | Abraham Edward Mendez | — | (805) 705 9585 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |