| 3 D Plumbing | John Keith David | — | (209) 304 4911 | Other | Sutter Creek · Amador County | — | — |
| 56 West Construction | Harrison Ray Read | — | (503) 800 8467 | GC, remodel, ADU | Ione · Amador County | — | — |
| 7 Bar 7 Fence | 7 Bar 7 Fence | — | (916) 479 6371 | Other | Jackson · Amador County | — | — |
| A & M Cooling And Heating INC | Paul David Gonzales | — | (209) 256 9115 | HVAC | Pioneer · Amador County | — | — |
| A - Zap Electric | Steven John Fogal | a_zapelectric@hotmail.com | (209) 274 4966 | Electricians | Ione · Amador County | — | — |
| A B C Auto Glass INC DBA Glass Doctor Of The Gold Country | Mark Richard Borchin | — | (209) 223 3101 | Windows, patio, painters | Jackson · Amador County | — | — |
| A C Sealant | A C Sealant | — | (209) 296 4531 | Other | Pine Grove · Amador County | — | — |
| A Leon Building | A Leon Building | — | (209) 256 6177 | GC, remodel, ADU | Pioneer · Amador County | — | — |
| A R J Painting | A R J Painting | — | (209) 295 6707 | Windows, patio, painters | Pine Grove · Amador County | — | — |
| Absolute Mechanical INC | John Randolph Scott | — | (209) 304 2402 | HVAC | Jackson · Amador County | — | — |
| Absolutely Floored | Absolutely Floored | interested@domainmarket.com | (209) 304 2506 | Other | Jackson · Amador County | — | — |
| Accents In Tile And Stone | Accents In Tile And Stone | — | (925) 998 5017 | Other | Jackson · Amador County | — | — |
| Access Sewer | Access Sewer | — | (916) 605 8643 | Other | Pine Grove · Amador County | — | — |
| Adkins Electric | Ted J Adkins | — | (209) 614 5762 | Electricians | Pine Grove · Amador County | — | — |
| Advanced Electric | James Raymond Wilson | — | (209) 256 1999 | Electricians | Sutter Creek · Amador County | — | — |
| Advanced Hardscapes Concrete INC | Eugenio Ivan Uribe | — | (916) 802 2333 | Other | Ione · Amador County | — | — |
| Affordable Electrician | Affordable Electrician | — | (916) 280 7916 | Electricians | Pine Grove · Amador County | — | — |
| Agricultural Pest Control Services | Agricultural Pest Control Services | — | (858) 536-2999 | Pest, tile roofs | Lakeside · Amador County | — | — |
| Agustin Custom Cabinetry | Agustin Custom Cabinetry | — | (209) 304 1701 | Other | Jackson · Amador County | — | — |
| Air King | Air King | info@air-king.com | (209) 274 2807 | HVAC | Ione · Amador County | — | — |
| Al's Building Construction | Alfred Mark Nunes | — | (209) 296 7890 | GC, remodel, ADU | Sutter Creek · Amador County | — | — |
| Al's Custom Painting | Al's Custom Painting | — | (760) 670-9083 | Windows, patio, painters | Valley Center · Amador County | — | — |
| Alan J Clinton Construction | Alan James Clinton | — | (209) 418 8536 | GC, remodel, ADU | Pine Grove · Amador County | — | — |
| Alfredo's Roofing | Alfredo's Roofing | — | (760) 705-7483 | Other roofers | Escondido · Amador County | — | — |
| All American Welding | All American Welding | — | (209) 295 6208 | Other | Pioneer · Amador County | — | — |
| All County Construction | Kurt Marcus Todden | — | (209) 256 6679 | GC, remodel, ADU | Ione · Amador County | — | — |
| All Locks And Doors | Marko Modi Jermy | — | (925) 918 7568 | Other | Fiddletown · Amador County | — | — |
| All Sierra Roof Company INC | Robert Timothy Thornhill | — | (209) 768 9496 | Other roofers | Jackson · Amador County | — | — |
| Allcom Telecom INC | Tom Henry Steahnke | — | (916) 990 4456 | Other | Plymouth · Amador County | — | — |
| Aloha Septic & Excavation | Fredric Eugene Waters | — | (209) 768 0368 | Other | Plymouth · Amador County | — | — |
| Alpine Air Conditioning And Heating | Alpine Air Conditioning And Heating | — | (209) 295-6484 | HVAC | Pioneer · Amador County | — | — |
| Amador Builders | Amador Builders | artisan@volcano.net | (209) 223 0778 | GC, remodel, ADU | Pine Grove · Amador County | — | — |
| Amador County Property Management | Amador County Property Management | — | (209) 223-9900 | Property managers | Pine Grove · Amador County | — | — |
| Amador Electric | Nicholas Jon Godman | — | (209) 770 3472 | Electricians | Volcano · Amador County | — | — |
| Amador Electrician | Amador Electrician | — | (209) 256-6595 | Electricians | Jackson · Amador County | — | — |
| Amador Fence Company | Jesse Andrew Dorris | — | (209) 304 4577 | Other | Jackson · Amador County | — | — |
| Amador Mechanical INC | Anthony William Vicini | — | (209) 245 3850 | Other | Plymouth · Amador County | — | — |
| Amador Plumbing | Amador Plumbing | — | (209) 223 2204 | Other | Sutter Creek · Amador County | — | — |
| Amador Roofing | Amador Roofing | — | (786) 391-1826 | Other roofers | Amador · Amador County | — | — |
| Amador Roots Tree Service And Property Maintenance LLC | Ernest Joseph Hernandez | — | (925) 413 0976 | Other | Jackson · Amador County | — | — |