| Romero Bros Construction LLC | CC-01 | 2023 | Active |
| Roof Time Inc | CC-01 | 2015 | Active |
| Rookery Bldrs Collective LLC | CC-01 | 2022 | Active |
| Root Down Design Build LLC | CC-01 | 2022 | Active |
| Rose Homes GC LLC | CC-01 | 2021 | Active |
| Rosemans LLC | CC-01 | 2023 | Active |
| Rosestone & Co LLC | CC-01 | 2025 | Active |
| Royal Rooter Home Services LLC | CC-01 | 2025 | Active |
| RP Services | CC-01 | 2020 | Active |
| RPB Engineering | CC-01 | 2025 | Active |
| RPS Construction Company LLC | CC-01 | 2009 | Active |
| RTG Construction LLC | CC-01 | 2018 | Active |
| Ru Handy | CC-01 | 2026 | Active |
| Rubenstein's Contract CRPT LLC | CC-01 | 1997 | Active |
| Rudd Construction LLC | CC-01 | 2016 | Active |
| Rudd Development Company Inc | CC-01 | 1996 | Active |
| Rudy Painting & Flooring | CC-01 | 2021 | Active |
| Ruiz Construction LLC | CC-01 | 2017 | Active |
| Rumax Construction LLC | CC-01 | 2016 | Active |
| Rush Hill Construction LLC | CC-01 | 2006 | Renew by Nov 15, 2026 |
| Rutheo Designs | CC-01 | 2022 | Active |
| RW Anderson Services Inc. | CC-01 | 2012 | Active |
| Ryan Pacific Construction | CC-01 | 2019 | Active |
| Ryatt Construction LLC | CC-01 | 2014 | Active |
| Ryznar Landscaping LLC | CC-01 | 2025 | Active |
| S W Hathaway Inc | CC-01 | 2004 | Active |
| Sabey Construction Inc | CC-01 | 1997 | Active |
| Sabey Corporation | CC-01 | 2022 | Active |
| Saddle & Spur Construction LLC | CC-01 | 2025 | Active |
| Sae Jeong LLC | CC-01 | 2026 | Active |
| Safe Chimney Inc | CC-01 | 2023 | Active |
| Safe House Renovation LLC | CC-01 | 2024 | Active |
| Safety Team Inc, The | CC-01 | 1989 | Active |
| Sage And Stone LLC | CC-01 | 2015 | Active |
| Saha Construction LLC | CC-01 | 2024 | Active |
| Salient Carpentry LLC | CC-01 | 2026 | Active |
| Salish Builders LLC | CC-01 | 2016 | Active |
| Salmon Bay Artisan LLC | CC-01 | 2022 | Active |
| Salmon Bay BLDG Prctnrs LLC | CC-01 | 2025 | Active |
| Saltwatr Corporation | CC-01 | 2026 | Active |
| Saltycreek LLC | CC-01 | 2024 | Active |
| Sam Construction LLC | CC-01 | 2018 | Active |
| Samara Hubner Inc, The | CC-01 | 1994 | Active |
| Samma Solutions | CC-01 | 2024 | Renew by Nov 22, 2026 |
| San Juan Haak Remodeling LLC | CC-01 | 2024 | Active |
| Sandra's Fresh Start LLC | CC-01 | 2016 | Renew by Dec 14, 2026 |
| Santie Steel LLC | CC-01 | 2023 | Active |
| Santos Landscaping Of Wa LLC | CC-01 | 2021 | Active |
| Sargent Construction Srvcs Inc | CC-01 | 2007 | Active |
| Sash Inc | CC-01 | 2007 | Active |
| Sasquatch Provisions LLC | CC-01 | 2021 | Active |
| Savvy Cabinetry By Design | CC-01 | 2018 | Renew by Nov 22, 2026 |
| Sawhorse Revolution | CC-01 | 2023 | Active |
| Sawtooth Construction GR LLC | CC-01 | 2026 | Active |
| Sawtooth Woodworks LLC | CC-01 | 2006 | Active |
| SB Structures LLC | CC-01 | 2006 | Active |
| Sbd.Services | CC-01 | 2025 | Active |
| Sbe Construction LLC | CC-01 | 2010 | Active |
| Scarsella Bros Inc | CC-01 | 1982 | Active |
| SCC Construction LLC | CC-01 | 2020 | Active |
| Schaefer Construction Inc | CC-01 | 2016 | Active |
| Schenkar Const Dsgn/Bld LLC | CC-01 | 2008 | Active |
| Schlough Studio LLC | CC-01 | 2026 | Active |
| Schrybot Builders LLC | CC-01 | 2018 | Active |
| Schuchart Corporation | CC-01 | 1988 | Active |
| Schulte Construction LLC | CC-01 | 2001 | Active |
| Schultz Miller Inc | CC-01 | 1989 | Active |
| Schumacher Construction | CC-01 | 2023 | Active |
| Schumacher Design Build LLC | CC-01 | 2022 | Renew by Dec 12, 2026 |
| Schuster Group Inc, The | CC-01 | 2007 | Active |
| Schwed Remodeling LLC | CC-01 | 2021 | Active |
| SCL Enterprises LLC | CC-01 | 2000 | Active |
| Scot Eckley Inc | CC-01 | 2001 | Active |
| Scribe Construction LLC | CC-01 | 2017 | Active |
| Sdek LLC | CC-01 | 2022 | Active |
| Sdi Construction Group | CC-01 | 2023 | Active |
| Sea & Shore Construction Inc | CC-01 | 1991 | Active |
| Sea Delta Construction LLC | CC-01 | 2023 | Active |
| Sea Mar Community Health CNTR | CC-01 | 2001 | Active |
| Sea Sec Wtrprfg & FDN RPRS LLC | CC-01 | 2026 | Active |
| Sea-West Contracting | CC-01 | 2022 | Active |
| Seaborn Pile Driving Company | CC-01 | 2006 | Active |
| Seacol Painting LLC | CC-01 | 2026 | Active |
| Seafab Corporation | CC-01 | 2024 | Active |
| Seahome Sweet Construction Co | CC-01 | 2018 | Active |
| Sealaska Const Solutions LLC | CC-01 | 2018 | Active |
| Sealaska Constructors LLC | CC-01 | 2009 | Active |
| Sealaska Secure Const Soln LLC | CC-01 | 2019 | Active |
| Seamos Build LLC | CC-01 | 2025 | Active |
| Seatac Construction & PVNG LLC | CC-01 | 2025 | Active |
| Seattle Arch Millwork LLC | CC-01 | 2020 | Active |
| Seattle Artisan Studio LLC | CC-01 | 2026 | Active |
| Seattle Boiler Works Inc | CC-01 | 1963 | Active |
| Seattle Building LLC | CC-01 | 2020 | Active |
| Seattle Chimney Pros LLC | CC-01 | 2026 | Active |
| Seattle Cleaning Company LLC | CC-01 | 2025 | Active |
| Seattle Cntertops Corporation | CC-01 | 2014 | Renew by Nov 27, 2026 |
| Seattle Const Resources Inc | CC-01 | 1990 | Active |
| Seattle Construction Group LLC | CC-01 | 2015 | Active |
| Seattle Deck Builder LLC | CC-01 | 2025 | Active |