| A - 1 Pools & Landscape | J Jesus Rojas | — | (530) 315 3886 | Windows, patio, painters | Yuba City · Sutter County | — | — |
| A - 1 Pools INC | Nicolas George Terlip | — | (909) 931 9396 | Pool | Upland · San Bernardino County | — | — |
| A - 1 Prestige Plumbing INC | James Tracy Thiry | — | (858) 748 3448 | Other | Poway · San Diego County | — | — |
| A - 1 Property Construction | David Michael Perman | — | (925) 686 4663 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| A - 1 Remediation Service | David Eugene Brooks | — | (916) 568 7624 | GC, remodel, ADU | Sacramento · Sacramento County | — | — |
| A - 1 Restoration & Repair INC | Gerri Jo Chambers | — | (760) 568 6672 | Restoration | Palm Springs · Riverside County | — | — |
| A - 1 Restoration INC | Issa Bendi Seoud | — | (408) 516 6993 | GC, remodel, ADU | Morgan Hill · Santa Clara County | — | — |
| A - 1 Sandblasting & Stucco Co INC | Alfredo Franco Torres | — | (310) 880 6584 | Windows, patio, painters | Inglewood · Los Angeles County | — | — |
| A - 1 Service Appliances INC | Amir M Mikhaiel | — | (310) 390 7870 | HVAC | Los Angeles · Los Angeles County | — | — |
| A - 1 Sprinkler & Landscaping | Munoz Ricardo | — | (310) 451 3300 | Windows, patio, painters | Reseda · Los Angeles County | — | — |
| A - 1 Testing / Maintenance INC | Matthew Norman Wied | — | (530) 448 4190 | Other | Truckee · Nevada County | — | — |
| A - 1 Testing / Site Services | Nathan Mark Ruppert | — | (530) 448 4190 | Other | Truckee · Nevada County | — | — |
| A - 1 Total Air Care | Michael Dale Ramsey | — | (916) 223 4397 | HVAC | Rio Linda · Sacramento County | — | — |
| A - 1 Total Service Plumbing | Raymond Lloyd Gray | — | (888) 201 8856 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A - 1 Tree Service INC | Donald Edward Needels | — | (408) 448 6408 | Tree | San Jose · Santa Clara County | — | — |
| A - 1 Welding Iron Works INC | Sophia Yon Hee Shin | — | (323) 277 3590 | Other | Vernon · Los Angeles County | — | — |
| A - 1 Window Tinting | A - 1 Window Tinting | — | (760) 773 9958 | Other | Palm Desert · Riverside County | — | — |
| A - 1 Wrought Iron | A - 1 Wrought Iron | — | (805) 324 1512 | Other | Santa Maria · Santa Barbara County | — | — |
| A - 2 - Z Handyman And Construction Service | Randy Wayne Pharr | — | (805) 610 8992 | GC, remodel, ADU | Templeton · San Luis Obispo County | — | — |
| A - 26 Construction & Electrical Contractors Company | Akaks Daniel | — | (310) 382 6400 | Electricians | Los Angeles · Los Angeles County | — | — |
| A - 3 Electric | Nazarian Norier | — | (818) 429 3431 | Electricians | Burbank · Los Angeles County | — | — |
| A - Accountable Business Systems | A - Accountable Business Systems | — | (619) 246 4158 | Other | San Diego · San Diego County | — | — |
| A - Advantage Plumbing | A - Advantage Plumbing | — | (909) 790 5900 | Other | Yucaipa · San Bernardino County | — | — |
| A - All Construction & Repairs | Michael Stevens Aguilar | — | (916) 470 7005 | GC, remodel, ADU | Carmichael · Sacramento County | — | — |
| A - American Gate Tech | A - American Gate Tech | — | (661) 350 6590 | Other | Lake Los Angeles · Los Angeles County | — | — |
| A - American Sliding Door | A - American Sliding Door | — | (805) 772 7287 | Windows, patio, painters | Los Osos · San Luis Obispo County | — | — |
| A - Automated Security Gates | A - Automated Security Gates | — | (818) 720 4088 | Alarm and generators | Agua Dulce · Los Angeles County | — | — |
| A - Better Glass Co | Garry Ward Wileman | — | (949) 496 2929 | Windows, patio, painters | San Clemente · Orange County | — | — |
| A - Brother Construction | Asikia Pati | — | (650) 518 0617 | GC, remodel, ADU | Newark · Alameda County | — | — |
| A - C Concrete | A - C Concrete | — | (562) 755 1941 | Other | Norwalk · Los Angeles County | — | — |
| A - C Reglazing | A - C Reglazing | — | (909) 973 0988 | Other | Ontario · San Bernardino County | — | — |
| A - Cap Cabinetry | A - Cap Cabinetry | — | (626) 422 4824 | Other | Sugarloaf · San Bernardino County | — | — |
| A - Custom Construction Co | Pete Cabrera Ramirez | — | (323) 722 6435 | GC, remodel, ADU | City Of Commerce · Los Angeles County | — | — |
| A - Custom Door & Window | Mike Allen Robertson | — | (818) 516 2104 | GC, remodel, ADU | Monrovia · Los Angeles County | — | — |
| A - Dependable Overhead Door Co | Christopher Michael Green | — | (209) 484 8977 | Other | Ripon · San Joaquin County | — | — |
| A - Force INC | Anthony Joseph Montantes | — | (209) 333 5296 | Windows, patio, painters | Lodi · San Joaquin County | — | — |
| A - Ford - Able Builders | David James Ford | — | (619) 277 3170 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| A - Fordable Plumbing | A - Fordable Plumbing | — | (562) 502 0216 | Other | Paramount · Los Angeles County | — | — |
| A - Frame Builders | A - Frame Builders | — | (858) 922 0741 | GC, remodel, ADU | Solana Beach · San Diego County | — | — |
| A - Frame Contracting | David Monroe Ashley | — | (714) 878 0473 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |