| Ron Clegg | Ron Clegg | — | (831) 252 6790 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Ronald Rodriguez | Ronald Rodriguez | — | (831) 535 3848 | Electricians | Watsonville · Santa Cruz County | — | — |
| Ronzano Sheet Metal INC | Michael Joseph Ronzano | — | (831) 688 9650 | HVAC | Aptos · Santa Cruz County | — | — |
| Roofscreen Mfg INC | Ryan Wesley Bruce | — | (831) 421 9230 | Other roofers | Scotts Valley · Santa Cruz County | — | — |
| Rootstic Art Landscapes INC | Max Igor Rivera | — | (831) 431 7187 | Windows, patio, painters | Watsonville · Santa Cruz County | — | — |
| Rory Ullman Electric Co | Rory Isaac Ullman | — | (831) 234 0568 | Electricians | Watsonville · Santa Cruz County | — | — |
| Rose Bros Plumbing | Justin Ryan Rose | — | (831) 440-7905 | Other | Felton · Santa Cruz County | — | — |
| Rose Construction INC | Timothy Scott Rose | — | (831) 588 8740 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Rosenthal Plumbing INC | David Aaron Rosenthal | — | (831) 476 4756 | Other | Santa Cruz · Santa Cruz County | — | — |
| Ross Swalve | Ross Swalve | — | (831) 239 2388 | GC, remodel, ADU | Scotts Valley · Santa Cruz County | — | — |
| Rowley Construction | John Arthur Rowley | — | (831) 234 0688 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Roxanne Marie Dean | Roxanne Marie Dean | — | (949) 735 3324 | Windows, patio, painters | Scotts Valley · Santa Cruz County | — | — |
| Roy Horn Design & Construction | Roy E Horn | — | (831) 238 6787 | GC, remodel, ADU | Soquel · Santa Cruz County | — | — |
| Ruben Rojas Construction INC | Ruben Carlos Rojas | — | (831) 431 3865 | GC, remodel, ADU | Boulder Creek · Santa Cruz County | — | — |
| Ruckle Construction | Matthew Peter Ruckle | — | (831) 247 2653 | GC, remodel, ADU | Felton · Santa Cruz County | — | — |
| Ruiz Tile & Marble | Ruiz Tile & Marble | — | (831) 818 3872 | Other | Watsonville · Santa Cruz County | — | — |
| Running Electric | John Charles Fasolas | — | (831) 335 9024 | Electricians | Felton · Santa Cruz County | — | — |
| Russell Hardwood Floors | Russell Hardwood Floors | — | (831) 335 5013 | Other | Santa Cruz · Santa Cruz County | — | — |
| Russell Smith Concrete | Russell Smith Concrete | — | (831) 247 1560 | Other | Santa Cruz · Santa Cruz County | — | — |
| Russo Company Masonry | Ralph Edward Russo | — | (831) 426 9131 | Other | Santa Cruz · Santa Cruz County | — | — |
| Ryan Burgess | Ryan Burgess | — | (831) 345 5171 | Windows, patio, painters | Aptos · Santa Cruz County | — | — |
| Ryan Comini | Ryan Comini | ryan@ryancomini.com | (831) 345 2548 | GC, remodel, ADU | Ben Lomond · Santa Cruz County | — | — |
| Ryan Doherty Construction | Ryan Patrick Doherty | — | (831) 359 8173 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| Ryan James Tile And Stone | Ryan James Tile And Stone | — | (831) 345 7913 | Other | Aptos · Santa Cruz County | — | — |
| Ryan Mcclain Construction | Ryan Joseph Mcclain | — | (650) 291 6761 | GC, remodel, ADU | Boulder Creek · Santa Cruz County | — | — |
| Ryan Muhr | Ryan Muhr | — | (831) 359 3275 | GC, remodel, ADU | Davenport · Santa Cruz County | — | — |
| Ryder Webb Construction | Ryder Chapman Webb | — | (831) 227 6533 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| S A Plumbing | S A Plumbing | — | (831) 840 3058 | Other | Watsonville · Santa Cruz County | — | — |
| S A R Development Corporation | Nathaniel Patrick Hart | hello@rfuenzalida.com | (831) 708 7300 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| S C Bean | S C Bean | — | (831) 818 6529 | GC, remodel, ADU | Boulder Creek · Santa Cruz County | — | — |
| S Hart Floor Co | Stephen James Hart | — | (530) 624 6920 | Other | Felton · Santa Cruz County | — | — |
| S J S Construction | Stephen John Shiner | — | (831) 345 1350 | GC, remodel, ADU | Felton · Santa Cruz County | — | — |
| S K P Plumbing | Scott Kevin Prince | — | (831) 419 3704 | Other | Santa Cruz · Santa Cruz County | — | — |
| S L R Construction INC | Scott Lewis Rogers | slrconstruction@mac.com | (831) 430 6235 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| S L V Electric INC | David Erik Duppen | — | (831) 227 9362 | Electricians | Felton · Santa Cruz County | — | — |
| S S Zuniga Construction INC | Salvador Martinez Zuniga | — | (831) 724 1328 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| Sal's Plumbing | Sal's Plumbing | — | (831) 840 3123 | Other | Watsonville · Santa Cruz County | — | — |
| Salata Ornamental Metals | Fred John Salata | — | (831) 786 8503 | Other | Watsonville · Santa Cruz County | — | — |
| Salted Oak Flooring | Christopher Walter Haltom | — | (831) 426 7300 | Other | Santa Cruz · Santa Cruz County | — | — |
| Saltline Electric | Macwhorter Alexander | — | (831) 600 6297 | Electricians | Santa Cruz · Santa Cruz County | — | — |