| Absolute Water | Absolute Water | — | (805) 489 0819 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| AC Cor Pavers | AC Cor Pavers | accorpavers@gmail.com | (805) 704 7512 | Other | Atascadero · San Luis Obispo County | — | — |
| Acapulco Home Renovation & Builders | Ivan Manuel Meza | — | (805) 440 6600 | GC, remodel, ADU | Pismo Beach · San Luis Obispo County | — | — |
| Access Limited Construction | Brian Wade Mc Neal | — | (805) 592 2230 | Other | Oceano · San Luis Obispo County | — | — |
| Ace Certified Tree Care | Ace Certified Tree Care | dave@acecertifiedtreecare.com | (805) 474 8013 | Tree | Arroyo Grande · San Luis Obispo County | — | — |
| Acme Stucco | Acme Stucco | — | (805) 481 0885 | Other | Grover Beach · San Luis Obispo County | — | — |
| Acosta's Painting | Acosta's Painting | — | (805) 927 1402 | Windows, patio, painters | Cambria · San Luis Obispo County | — | — |
| Acoustical Connection | Acoustical Connection | — | (805) 801 1089 | Other | Oceano · San Luis Obispo County | — | — |
| Action Home Inspection Service | Barry Samuel Stone | — | (805) 438 3000 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Action Rooter | Action Rooter | — | (805) 541 1333 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Adam Mcalexander Electric | Adam Joe Mcalexander | — | (805) 806 1153 | Electricians | Arroyo Grande · San Luis Obispo County | — | — |
| Adam Smith | Adam Smith | — | (805) 670 1386 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Adam's Heating & Cooling | Adam's Heating & Cooling | — | (805) 550 4932 | HVAC | Grover Beach · San Luis Obispo County | — | — |
| Addison Landscape And Maintenance INC | Tyler Robinson Addison | — | (805) 473 0913 | Windows, patio, painters | Arroyo Grande · San Luis Obispo County | — | — |
| Advanced Concrete & Construction INC | Micah Henry Utter | — | (805) 238 7888 | GC, remodel, ADU | Templeton · San Luis Obispo County | — | — |
| Advanced Electrical Contractors LLC | Richard Liam Healy | interested@domainmarket.com | (425) 210 8477 | Electricians | Atascadero · San Luis Obispo County | — | — |
| Advanced Electrical Systems INC | Dennis Armand Mastagni | — | (805) 237 1309 | Electricians | Paso Robles · San Luis Obispo County | — | — |
| Advanced Fire Protection | James Dale Bye | — | (805) 235 8108 | Other | Atascadero · San Luis Obispo County | — | — |
| Advanced Pools | Advanced Pools | rlegnon@advancedpools.com | (805) 550 7944 | Pool | Atascadero · San Luis Obispo County | — | — |
| Advanced Septic Solutions | Todd Allen Robinson | interested@domainmarket.com | (805) 440 3348 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Advanced Wireless | Karen Elizabeth Rudnick | — | (805) 922 2252 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Advantage Technical Services INC | Bryce Orian Griffith | — | (805) 595 2282 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Affordable General Construction Company | Miguel Angel Soto Galvan | — | (805) 712 1555 | GC, remodel, ADU | Grover Beach · San Luis Obispo County | — | — |
| Age Busters INC | Sean Martin Flavin | — | (760) 920 3546 | Electricians | Pismo Beach · San Luis Obispo County | — | — |
| Aggson's Paint & Glass | Gale Marie Garrison | — | (805) 543 0835 | Windows, patio, painters | San Luis Obispo · San Luis Obispo County | — | — |
| Agin Construction | Nathan Lee Agin | — | (805) 709 1746 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Aguilar Landscape & Maintenance | Marco Antonio Aguilar | — | (805) 471 5587 | Windows, patio, painters | Oceano · San Luis Obispo County | — | — |
| Aguilar Pools | Aguilar Pools | — | (805) 674 6430 | Pool | Paso Robles · San Luis Obispo County | — | — |
| Aguirre Painting | Aguirre Painting | aguirrepainting11@yahoo.com | (805) 345 1342 | Windows, patio, painters | Grover Beach · San Luis Obispo County | — | — |
| Ah Carpentry | Ah Carpentry | — | (661) 889 6090 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Aiello Electric | Greg Lewis Aiello | aielloelectricllc@gmail.com | (805) 441 1142 | Electricians | Templeton · San Luis Obispo County | — | — |
| Air - Left Refrigeration & Heating | Richard James Jr Avery | — | (805) 441 0761 | HVAC | Atascadero · San Luis Obispo County | — | — |
| Air Care Heating And Air Conditioning | David Allen Andreatta | — | (805) 717 8131 | HVAC | Nipomo · San Luis Obispo County | — | — |
| Air Champs | Air Champs | — | (408) 603 8784 | HVAC | Paso Robles · San Luis Obispo County | — | — |
| Air-rite Refrigeration | James Arne Johansen | — | (805) 461 3033 | HVAC | Atascadero · San Luis Obispo County | — | — |
| Airway Heating & Air | Kenneth Edward Ii Rice | — | (805) 710 7851 | HVAC | Nipomo · San Luis Obispo County | — | — |
| Al's Septic Pumping Service INC | Robert Matthew Beavers | — | (805) 528 0432 | Other | Los Osos · San Luis Obispo County | — | — |
| Albert Electric | Albert Marc | — | (805) 471 7817 | Electricians | Paso Robles · San Luis Obispo County | — | — |
| Alcatraz Landscape INC | Marco Antonio Martinez Andres | — | (805) 788 8509 | Windows, patio, painters | San Luis Obispo · San Luis Obispo County | — | — |
| Alden Construction | Holt Roland Alden | — | (805) 235 1329 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |