| Affordable Electric Services | Michael Robert Giovacchini | — | (707) 812 0133 | Electricians | Davis · Yolo County | — | — |
| Affordable Gardening & Landscaping LLC | Satpreet Singh Dhanda | — | (530) 220 5522 | Windows, patio, painters | Woodland · Yolo County | — | — |
| Affordable House Painting | Affordable House Painting | — | (530) 219 3041 | Windows, patio, painters | Woodland · Yolo County | — | — |
| Afm Environmental INC | Mark Douglas Gillming | — | (916) 514 7526 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Afridi Enterprises INC | Nasrullah Afridi | — | (916) 803 5243 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Aggie HVAC & Electrical Corp | Qiang Zhou | — | (530) 908 5621 | HVAC | Davis · Yolo County | — | — |
| Aggregate Engineering INC | Berardi Michael | — | (510) 750 5955 | Other | Davis · Yolo County | — | — |
| Airpro LLC | Jaswant Singh Virk | — | (916) 476 7878 | HVAC | West Sacramento · Yolo County | — | — |
| Airtight Sd | Airtight Sd | airtightsocal@gmail.com | (619) 886 0489 | HVAC | Woodland · Yolo County | — | — |
| Aj Pools | Aj Pools | — | (530) 908 5431 | Pool | Woodland · Yolo County | — | — |
| Aj's Concrete And Landscape Contractors | Jacobo Armando | — | (916) 376 0777 | Windows, patio, painters | West Sacramento · Yolo County | — | — |
| Aj's Roofing | Verduzco Alejandro Jaramillo | info@ajsroofing.com | (505) 453-5626 | Other roofers | Woodland · Yolo County | — | — |
| Alamo Heating & Cooling INC | Sergio Alamo-Hernandez | — | (707) 689 8559 | HVAC | Esparto · Yolo County | — | — |
| Alan's House Painting | Alan's House Painting | — | (530) 756 8188 | Windows, patio, painters | Davis · Yolo County | — | — |
| Alderson M Olvera | Alderson M Olvera | — | (916) 995 7753 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Alejandro - J R Hernandez Construction | Alejandro Jr Hernandez | — | (530) 923 1055 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Alexis Landry | Alexis Landry | — | (916) 412 1270 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Aliev Construction INC | Nasim Aliev | alievconstruction@gmail.com | (916) 585 6806 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| All About Him Electric | Ross Edward Taylor | — | (916) 534 3518 | Electricians | West Sacramento · Yolo County | — | — |
| All About Patios | David Allen Rochester | — | (916) 764 2124 | Electricians | West Sacramento · Yolo County | — | — |
| All Action Awards INC | Jay Peter Cahn | — | (530) 666 3220 | Other | Woodland · Yolo County | — | — |
| All Bay Construction | Gavin Huntington Broder | info@allbayconstruction.com | (925) 308-5919 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| All Construction Engineering Contractors | Gus Tony Jr Stanko | — | (916) 628 0985 | Other | West Sacramento · Yolo County | — | — |
| All HVAC Services INC | Ricardo Gonzalez | — | (916) 793 9205 | HVAC | West Sacramento · Yolo County | — | — |
| All In One Painting And Decorating | Timothy Michael Shea | — | (530) 771 7729 | Windows, patio, painters | Davis · Yolo County | — | — |
| All Points Recycling And Demolition | All Points Recycling And Demolition | — | (530) 979 7950 | Other | Woodland · Yolo County | — | — |
| Alliance Tree Service INC | Lopez Alberto | — | (530) 662 6851 | Tree | Woodland · Yolo County | — | — |
| Allied Doors | Weldon Randall Kelley | info@allieddoors.com | (916) 421 3080 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Alonso's Roofing INC | Juan Alonso Cota Ruiz | alonso.cota@icloud.com | (530) 867 3431 | Other roofers | Woodland · Yolo County | — | — |
| Alpha General Builders | Eduardo Fabian Dominguez Mejia | — | (916) 308 3850 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Alta Quality Painting INC | Altamirano Cristian | — | (530) 450 9717 | Windows, patio, painters | Davis · Yolo County | — | — |
| Altos Utilities And Grading | Altos Utilities And Grading | — | (530) 204 7643 | Other | Woodland · Yolo County | — | — |
| Alvo Heating And Cooling | Alvo Heating And Cooling | — | (916) 501 3362 | HVAC | West Sacramento · Yolo County | — | — |
| Am Landscaping Services | Harjindra Kaur Singh | impallari@gmail.com | (530) 393 6807 | Windows, patio, painters | Woodland · Yolo County | — | — |
| Amazing Wood Floors | Amazing Wood Floors | interested@domainmarket.com | (530) 219 4902 | Other | Woodland · Yolo County | — | — |
| American Electric | Joseph Michael Thompson | — | (707) 529 8150 | Electricians | Woodland · Yolo County | — | — |
| American Industrial Flooring INC | Dan Quin Chervinskas | — | (530) 787 4875 | Other | Esparto · Yolo County | — | — |
| American Therapy Tubs | Keith Bryant Howard | — | (916) 685 0888 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| American Water Works | American Water Works | — | (707) 333 6088 | Other | Winters · Yolo County | — | — |
| Amigo Roofing | Gustavo Alejandro Ayala | — | (916) 371 3517 | Other roofers | West Sacramento · Yolo County | — | — |