| A B Z Tile Company | Barnas Jerry | — | (760) 510 9383 | Other | San Marcos · San Diego County | — | — |
| A Baca Electric | Anthony Richard Baca | — | (951) 342 0007 | Electricians | Sun City · Riverside County | — | — |
| A Barajas Concrete | A Barajas Concrete | — | (805) 260 4624 | Other | Santa Maria · Santa Barbara County | — | — |
| A Barrios General Building Contractor Painting & Decorating | Abner Asael Barrios | — | (415) 264 6092 | Electricians | Redwood City · San Mateo County | — | — |
| A Barron Painting | A Barron Painting | — | (951) 505 3395 | Windows, patio, painters | Fontana · San Bernardino County | — | — |
| A Bean Electric | Alexander Boston Bean | — | (707) 498 4036 | Electricians | Eureka · Humboldt County | — | — |
| A Bearded Handyman | A Bearded Handyman | — | (916) 548 7353 | GC, remodel, ADU | Sacramento · Sacramento County | — | — |
| A Beautiful Finish INC | Paul Eric Rinehart | — | (323) 864 5511 | Other | Glendale · Los Angeles County | — | — |
| A Beautiful Rose Fencing Company INC | Pete Reyes | — | (916) 910 8412 | Other | Carmichael · Sacramento County | — | — |
| A Beristain Construction | Jose Antonio Beristain | — | (831) 566 4603 | GC, remodel, ADU | Soquel · Santa Cruz County | — | — |
| A Berumen Construction | Andres Jr Berumen | — | (951) 545 7352 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| A Better Bath & Kitchen | A Better Bath & Kitchen | — | (916) 532 5379 | GC, remodel, ADU | Fair Oaks · Sacramento County | — | — |
| A Better Blind And Drapery | A Better Blind And Drapery | — | (949) 498 3212 | Other | Rancho Mission Viejo · Orange County | — | — |
| A Better Cabinet | A Better Cabinet | — | (562) 619 3981 | Other | La Mirada · Los Angeles County | — | — |
| A Better Cabinet & Design | A Better Cabinet & Design | — | (510) 260 0590 | Other | El Cerrito · Contra Costa County | — | — |
| A Better Choice Development INC | Daniel Osvaldo Mangaroni | — | (909) 931 1007 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| A Better Choice Painting | A Better Choice Painting | — | (916) 966 9700 | Windows, patio, painters | Placerville · El Dorado County | — | — |
| A Better Connection - Plus | A Better Connection - Plus | — | (310) 918 0729 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| A Better Deal INC | Somchai Samanukorn | — | (818) 606 7955 | HVAC | Chatsworth · Los Angeles County | — | — |
| A Better Door Co | Nikitin Sergey | — | (916) 275 7099 | Other | Roseville · Placer County | — | — |
| A Better Electrical Company INC | Jayson Daniel Hinton | — | (707) 230 6701 | Electricians | Vacaville · Solano County | — | — |
| A Better Fence Company INC | Scott William Gregory | — | (916) 417 5585 | Other | Citrus Heights · Sacramento County | — | — |
| A Better Fire Restoration | Daniel Osvaldo Mangaroni | — | (909) 931 1007 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| A Better Home Improvement Company | Ronald Lee Jr Coates | — | (530) 519 5214 | GC, remodel, ADU | Gerber · Tehama County | — | — |
| A Better Home Inspection By Forsters | A Better Home Inspection By Forsters | — | (760) 805-1966 | Inspectors | Fallbrook · San Diego County | — | — |
| A Better Plumb Co LLC | Micah James Vasey | — | (707) 949 3149 | Other | Santa Rosa · Sonoma County | — | — |
| A Better Roofing Company | Brett James Moran | — | (925) 370 1158 | Other roofers | Livermore · Alameda County | — | — |
| A Better Rooter Plumbing & Engineering INC | Jacques Michel Etienne | — | (510) 527 1219 | Other | Berkeley · Alameda County | — | — |
| A Better Surface | A Better Surface | — | (951) 893 7949 | Other | Eastvale · Riverside County | — | — |
| A Better Tree Service | Jeffrey David Strader | — | (916) 483 3948 | Windows, patio, painters | Sacramento · Sacramento County | — | — |
| A Better Way | A Better Way | — | (805) 543 4405 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| A Better Way General Contracting | Miguel Galindo Garcia | info@christianroofing.com | (858) 229 9324 | Other roofers | Escondido · San Diego County | — | — |
| A Better World Construction | Laird Davis Norgeot | — | (707) 273 2389 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| A Bevinetto Const | A Bevinetto Const | — | (818) 261 1332 | GC, remodel, ADU | Woodland Hills · Los Angeles County | — | — |
| A Big Door Co | Steven Kent Fuller | — | (805) 714 7335 | Other | Santa Maria · Santa Barbara County | — | — |
| A Bonner Electric | A Bonner Electric | — | (209) 217-9840 | Electricians | Merced · Merced County | — | — |
| A Bottom Up Home Remodel | A Bottom Up Home Remodel | — | (714) 404 4049 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| A Bright Idea Electric | Juan Carlos Pulido | — | (310) 420 3908 | Electricians | Lakewood · Los Angeles County | — | — |
| A Brinkley Construction | Alvin Lee Brinkley | — | (760) 310 5736 | GC, remodel, ADU | Vista · San Diego County | — | — |
| A Broad Builder INC | Jennifer Lynn Gutierrez | — | (562) 639 8344 | GC, remodel, ADU | Whittier · Los Angeles County | — | — |