| A&w Builders INC | David Allen Wilson | awbuildersocal@gmail.com | (949) 680 9552 | GC, remodel, ADU | San Juan Capistrano · Orange County | — | — |
| A&z General Construction | Mohammed Abdel Aziz | — | (559) 682 7273 | GC, remodel, ADU | Sanger · Fresno County | — | — |
| A&z Innova Contractors | Jorge Alberto Ocampo Lopez | — | (951) 391 4924 | GC, remodel, ADU | Banning · Riverside County | — | — |
| A'alam Sadeghi | A'alam Sadeghi | — | (714) 776 5599 | Electricians | Orange · Orange County | — | — |
| A's & Sons Concrete | Andrew Jonathan Aguirre | — | (949) 549 9397 | Other | Santa Ana · Orange County | — | — |
| A's 1 Roofing | Ricardo Gonzalez | — | (951) 783 7189 | Other roofers | Redlands · San Bernardino County | — | — |
| A's Artificial Grass | Cesar Eduardo Aguilar Ledezma | — | (760) 485 2723 | Other | Coachella · Riverside County | — | — |
| A's Canvas INC | Martinez Arturo | — | (323) 702 7019 | Other | South El Monte · Los Angeles County | — | — |
| A's Concrete Corporation | Ester O'neal Stevens | — | (747) 388 1564 | Other | Panorama City · Los Angeles County | — | — |
| A's Construction | Sergio Jr Armenta | — | (951) 795 3897 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| A's Construction | Castaneda Alonzo | — | (323) 818 6427 | GC, remodel, ADU | Compton · Los Angeles County | — | — |
| A's Contractor INC | Octavian Petrut | — | (800) 886 1594 | GC, remodel, ADU | Orange · Orange County | — | — |
| A's Custom Builder | A's Custom Builder | — | (949) 357 4969 | GC, remodel, ADU | Laguna Niguel · Orange County | — | — |
| A's Drywall INC | Mario Anaya | estimating@asdrywall.com | (209) 229 1986 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| A's Electric | Arellano Armando | — | (760) 673 9641 | Electricians | Indio · Riverside County | — | — |
| A's Flooring INC | Sergio Alarid | — | (619) 207 6864 | Other | San Diego · San Diego County | — | — |
| A's Heating & Air Services INC | Sevilla Axel | — | (626) 437 1998 | HVAC | Chino · San Bernardino County | — | — |
| A's Landscaping | A's Landscaping | — | (707) 363 2562 | Windows, patio, painters | St Helena · Napa County | — | — |
| A's Landscaping | A's Landscaping | — | (916) 534 2704 | Windows, patio, painters | Elk Grove · Sacramento County | — | — |
| A's Painting | De La Luz Gerardo Alcantara | — | (949) 344 0209 | Windows, patio, painters | Laguna Hills · Orange County | — | — |
| A's Plumbing & Drains | A's Plumbing & Drains | — | (559) 232 8866 | Other | Madera · Madera County | — | — |
| A's Plumbing And Drain Cleaning | A's Plumbing And Drain Cleaning | — | (626) 672 5415 | Other | San Bernardino · San Bernardino County | — | — |
| A's Plumbing Works INC | Jose David Alfaro Quintanilla | — | (310) 892 2013 | Other | San Pedro · Los Angeles County | — | — |
| A's Professional Roofing INC | Aguilar Huipe Martin | — | (949) 903 4121 | Other roofers | Orange · Orange County | — | — |
| A's Quality Concrete | A's Quality Concrete | — | (408) 500 9972 | Other | San Jose · Santa Clara County | — | — |
| A's Rubber Solutions INC | Escobedo Arturo Espino | — | (951) 259 7275 | Other | Moreno Valley · Riverside County | — | — |
| A's Tree Service | Segura Areli | — | (714) 296 2598 | Tree | Placentia · Orange County | — | — |
| A's Tree Service INC | Victor Alfonso Gomez Perez | — | (408) 600 8803 | Tree | San Jose · Santa Clara County | — | — |
| A'sap Tree Care | A'sap Tree Care | — | (916) 793 9480 | Other | Sacramento · Sacramento County | — | — |
| A+ Air Comfort Solutions INC | Gabriel Dominick Rodelo | mn@tritonair.net | (760) 938 6165 | HVAC | Escondido · San Diego County | — | — |
| A+ Build Construction INC | Alfredo Machado Quintero | — | (909) 559 8934 | GC, remodel, ADU | Desert Hot Springs · Riverside County | — | — |
| A+ Construction | Francisco Omar Arauz | — | (415) 323 8421 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| A+ Construction | Jeffrey Scott Orman | — | (714) 350 8232 | GC, remodel, ADU | Aliso Viejo · Orange County | — | — |
| A+ Construction | Jeremy Ray Mclaughlin | — | (559) 760 6857 | GC, remodel, ADU | Ahwahnee · Madera County | — | — |
| A+ Construction | Son Phi Pham | — | (626) 443 9288 | GC, remodel, ADU | South El Monte · Los Angeles County | — | — |
| A+ Construction & Remodeling Adu Builders | Smolevskiy Roman | — | (916) 970 0047 | GC, remodel, ADU | North Highlands · Sacramento County | — | — |
| A+ Construction & Remodeling Adu Builders | A+ Construction & Remodeling Adu Builders | — | (916) 237-3568 | GC, remodel, ADU | North Highlands · Placer County | — | — |
| A+ Contractor INC | Odilon Nemesio Gonzalez | — | (510) 472 4589 | Other | San Leandro · Alameda County | — | — |
| A+ Custom Framing INC | Ilona Beshta | — | (916) 257 2367 | GC, remodel, ADU | Roseville · Placer County | — | — |
| A+ Electric Services INC | Enrique Jr Lopez | — | (310) 850 8151 | Electricians | Upland · San Bernardino County | — | — |