| 3G Carpentry INC | Gregory Gordon Govan | — | (831) 566 3719 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| 4 Long Term Construction | Nieves Reyes Longino | — | (831) 840 4293 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| 4A Electric & Building | Brian Vale Foraker | — | (831) 332 3374 | Electricians | Santa Cruz · Santa Cruz County | — | — |
| 6th Gen Masonry | 6th Gen Masonry | 6thgenmasonry@gmail.com | (831) 359 3849 | Other | Aptos · Santa Cruz County | — | — |
| 831 Builder | 831 Builder | — | (831) 224 6822 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| 831 Electric LLC | Wesley Adam Merrell | — | (831) 239 2271 | Electricians | Boulder Creek · Santa Cruz County | — | — |
| 831 Garage Doors | 831 Garage Doors | — | (831) 400 6596 | Other | Watsonville · Santa Cruz County | — | — |
| A & B Construction Services | Monte Michael Bishop | — | (408) 674 5072 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| A & B Raingutters | A & B Raingutters | — | (831) 588 0720 | Other | Santa Cruz · Santa Cruz County | — | — |
| A & C Grading INC | Steven Frank Gonzales | — | (831) 840 0554 | Other | Watsonville · Santa Cruz County | — | — |
| A + Construction INC | Kenneth Walter Clausing | — | (831) 335 0128 | GC, remodel, ADU | Felton · Santa Cruz County | — | — |
| A + Tree Service | Jason Matthew Clausing | — | (831) 566 4145 | Tree | Felton · Santa Cruz County | — | — |
| A - 1 Building Solutions INC | Tracy Lynn Armintrout | — | (831) 763 0563 | GC, remodel, ADU | Freedom · Santa Cruz County | — | — |
| A - 1 Garage Doors | A - 1 Garage Doors | — | (831) 818 1527 | Other | Watsonville · Santa Cruz County | — | — |
| A - Locksmith - Craig | A - Locksmith - Craig | — | (831) 234 4025 | Other | Felton · Santa Cruz County | — | — |
| A Accurate O H Door | A Accurate O H Door | — | (831) 722 1234 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| A And G Tile | A And G Tile | info@agtile.com | (831) 818 4002 | Other | Watsonville · Santa Cruz County | — | — |
| A Angelo's Roofing Co | Medina Angel | — | (831) 427 8334 | Other roofers | Aptos · Santa Cruz County | — | — |
| A Beristain Construction | Jose Antonio Beristain | — | (831) 566 4603 | GC, remodel, ADU | Soquel · Santa Cruz County | — | — |
| A C Bentley Concrete INC | Adam Calman Bentley | adam@acbentleyconcrete.com | (831) 419 0368 | Other | Soquel · Santa Cruz County | — | — |
| A C C Construction | Adrian Morales Jimenez | — | (831) 316 8912 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| A C Fencing | A C Fencing | — | (831) 566 2914 | Other | Capitola · Santa Cruz County | — | — |
| A C R Pro Painting | A C R Pro Painting | acrpropainting@gmail.com | (831) 288 4209 | Windows, patio, painters | Watsonville · Santa Cruz County | — | — |
| A D S Wallcovering | A D S Wallcovering | — | (408) 529 1769 | Windows, patio, painters | Capitola · Santa Cruz County | — | — |
| A G Roofing | Guerrero Jimenez Alejandro | — | (831) 761 8242 | Other roofers | Watsonville · Santa Cruz County | — | — |
| A Growing Concern | Donald Loewen Berry Penner | — | (831) 458 3447 | Windows, patio, painters | Santa Cruz · Santa Cruz County | — | — |
| A I C Painting | A I C Painting | — | (831) 750 7791 | Windows, patio, painters | Felton · Santa Cruz County | — | — |
| A P C S C INC | Andrew Maximilian Towne | — | (831) 345 8101 | Other | Scotts Valley · Santa Cruz County | — | — |
| A P M | A P M | — | (650) 776 4064 | GC, remodel, ADU | Capitola · Santa Cruz County | — | — |
| A S Pool And Spa Maintenance | Andres Gutierrez Vega | — | (669) 639 0319 | Pool | Soquel · Santa Cruz County | — | — |
| A To Z Builders | Salvador Martinez Zuniga | — | (831) 234 4034 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| A-1 Deadbolt & Door | A-1 Deadbolt & Door | — | (831) 476 7970 | GC, remodel, ADU | Capitola · Santa Cruz County | — | — |
| A-custom Construction Company | Ronald Albert Esche | — | (831) 818 1323 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| A-n-j Roth Electric INC | Glenn Anthony Roth | — | (831) 428-1424 | Electricians | Soquel · Santa Cruz County | — | — |
| A-team Energy Solutions INC | Saki Sharan Quintero-Shawar | — | (831) 334 8575 | Electricians | Freedom · Santa Cruz County | — | — |
| Aaron Ackerman Construction | Aaron James Ackerman | — | (831) 809 4922 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Aaron Anderson | Aaron Anderson | — | (831) 419 2131 | GC, remodel, ADU | Ben Lomond · Santa Cruz County | — | — |
| Aaron Chase | Aaron Chase | — | (831) 566 1336 | GC, remodel, ADU | Boulder Creek · Santa Cruz County | — | — |
| Aaron Garfinkel Construction | Garfinkel Aaron | — | (831) 335 3996 | GC, remodel, ADU | Boulder Creek · Santa Cruz County | — | — |
| Aaron Lakey Construction | Aaron John Lakey | — | (831) 234 0072 | GC, remodel, ADU | Scotts Valley · Santa Cruz County | — | — |