| RSG Services LLC | CC-01 | 2024 | Active |
| RTT Services | CC-01 | 2019 | Active |
| Ryner Homes LLC | CC-01 | 2006 | Active |
| S & J Enterprises | CC-01 | 2023 | Active |
| S&I Design LLC | CC-01 | 2024 | Active |
| S&S H Solutions LLC | CC-01 | 2024 | Renew by Nov 1, 2026 |
| Sasquatch Designs LLC | CC-01 | 2026 | Active |
| Sasquatch Land Co LLC | CC-01 | 2026 | Active |
| Sateren Construction Inc | CC-01 | 1993 | Active |
| Savitar General Const LLC | CC-01 | 2026 | Active |
| Schmaus Haus Construction LLC | CC-01 | 2025 | Active |
| Scott's Painting & RMDL Co LLC | CC-01 | 2019 | Active |
| Seattle Bath And Shower | CC-01 | 2023 | Active |
| Seattle Brickmaster | CC-01 | 2018 | Active |
| Seattle Surfaces | CC-01 | 2012 | Active |
| Seattle's Best FLRG DSGN Inc | CC-01 | 2007 | Active |
| Secure A Site Inc | CC-01 | 2010 | Renew by Dec 15, 2026 |
| Sequoia Const & Consulting LLC | CC-01 | 2016 | Active |
| Service Electric Co Inc | CC-01 | 2020 | Renew by Dec 14, 2026 |
| Service Pro WTR DMG Rstrtn | CC-01 | 2025 | Active |
| Servpro/N Evrtt/Lk Stvns/Mnroe | CC-01 | 2013 | Active |
| Setzer Plumbing | CC-01 | 2018 | Active |
| Seven Point Construction LLC | CC-01 | 2025 | Active |
| Sewer Detectives | CC-01 | 2011 | Active |
| Shamrock Metal Systems Inc | CC-01 | 2002 | Active |
| Sheekconstruction LLC | CC-01 | 2023 | Active |
| Sherpa Roofing & Constrctn LLC | CC-01 | 2017 | Active |
| Sholdt Cntrctng & Cnslt LLC | CC-01 | 2021 | Active |
| Silver Line Precision Plus LLC | CC-01 | 2020 | Active |
| SJ Teddy Plumbing Cntrtrs LLC | CC-01 | 2024 | Active |
| Skinner Landscape Service Inc | CC-01 | 1993 | Active |
| SL Quality Tile Inc | CC-01 | 2015 | Active |
| SlideRight Window & Door | CC-01 | 2014 | Active |
| Smith Brothers GNRL Contng LLC | CC-01 | 2026 | Active |
| Smoots Development Inc | CC-01 | 2008 | Active |
| Sno Town Developers LLC | CC-01 | 2025 | Active |
| Sno-Co Door Co LLC | CC-01 | 2023 | Active |
| Snocon LLC | CC-01 | 2023 | Active |
| Snohomish Construction LLC | CC-01 | 2023 | Active |
| Snohomish Roofing Company | CC-01 | 2023 | Active |
| Snohomish Skill Saw LLC | CC-01 | 2022 | Active |
| Snoville Construction LLC | CC-01 | 2025 | Active |
| Solid Centre LLC | CC-01 | 2022 | Renew by Dec 27, 2026 |
| Solid Ground Excavating LLC | CC-01 | 2022 | Active |
| Soper Hill Construction Co LLC | CC-01 | 2022 | Active |
| Sound Crawls LLC | CC-01 | 2024 | Active |
| Sound Home & Proprty Srvcs LLC | CC-01 | 2022 | Active |
| Sound Stump Removal LLC | CC-01 | 2023 | Active |
| Sound To Summit Drywall LLC | CC-01 | 2019 | Active |
| Specialty Pump & Plumbing Inc | CC-01 | 2023 | Active |
| SS Homes LLC | CC-01 | 2024 | Active |
| Star Construction | CC-01 | 2025 | Active |
| Stingrey Services LLC | CC-01 | 2023 | Active |
| Straight Line Striping | CC-01 | 2012 | Active |
| Strom Construction | CC-01 | 2023 | Active |
| Sullivan Construction | CC-01 | 2008 | Active |
| Summit Landscape & Constr LLC | CC-01 | 2026 | Active |
| Sunny Concrete & Const LLC | CC-01 | 2023 | Active |
| Sunrise Const Wa NW LLC | CC-01 | 2023 | Active |
| Surgent Inc | CC-01 | 2010 | Active |
| T & T Selmer Construction Inc | CC-01 | 2001 | Active |
| T Grover Enterprises LLC | CC-01 | 2023 | Active |
| T P C Construction Inc | CC-01 | 2000 | Active |
| T R U Construction LLC | CC-01 | 2012 | Active |
| T-Squared Construction LLC | CC-01 | 2016 | Active |
| Tapert Homes LLC | CC-01 | 2017 | Active |
| Tastad Construction Inc | CC-01 | 2003 | Active |
| Taylor Roberts LLC | CC-01 | 2007 | Active |
| Taylors Snohomish Tree Ser LLC | CC-01 | 2010 | Active |
| Teddy/Miller Developments LLC | CC-01 | 2026 | Active |
| Teka Homes LLC | CC-01 | 2025 | Active |
| Telgenhoff Farms LLC | CC-01 | 2025 | Active |
| Tenney Construction Inc | CC-01 | 2014 | Renew by Dec 18, 2026 |
| The Flooring Team LLC | CC-01 | 2015 | Active |
| The Natural Option LLC | CC-01 | 2009 | Active |
| Tidal General Contractors LLC | CC-01 | 2024 | Renew by Nov 22, 2026 |
| Tim's Backflow Testing LLC | CC-01 | 2016 | Active |
| Timbercrest Homes LLC | CC-01 | 2024 | Active |
| Timberline Communications LLC | CC-01 | 2025 | Active |
| Todd Construction LLC | CC-01 | 2025 | Active |
| Tony Guzman Excavating LLC | CC-01 | 2016 | Active |
| Top Level Contracting | CC-01 | 2009 | Active |
| Total Home Construction LLC | CC-01 | 2018 | Active |
| Tovacon | CC-01 | 2022 | Active |
| Trademark Resdntl/Comm SRV LLC | CC-01 | 2020 | Active |
| Transformative Builds LLC | CC-01 | 2024 | Active |
| Trash Panda General Contr LLC | CC-01 | 2023 | Active |
| Tri Power Construction LLC | CC-01 | 2025 | Active |
| Trigger Welding & Fab Inc | CC-01 | 2021 | Active |
| Triple Net Const Serv LLC | CC-01 | 2022 | Active |
| Triple R Aggregate Inc | CC-01 | 1990 | Active |
| Tristar Construction NW LLC | CC-01 | 2019 | Active |
| Tru Terras Landscaping LLC | CC-01 | 2019 | Active |
| True Built Construction LLC | CC-01 | 2025 | Active |
| Tsuman Group LLC | CC-01 | 2019 | Active |
| Umeasureit.Com LLC | CC-01 | 2007 | Active |
| United Surfaces LLC | CC-01 | 2016 | Active |
| Universal Framing Const Inc | CC-01 | 2024 | Active |
| Universal Landscaping LLC | CC-01 | 2024 | Active |
| Usvet LLC | CC-01 | 2025 | Active |