| JL Building LLC | CC-01 | 2023 | Active |
| JM Land Development LLC | CC-01 | 2023 | Active |
| JM Legacy Builders LLC | CC-01 | 2021 | Active |
| Johnson CSTM Farmg/Exvtng LLC | CC-01 | 2014 | Active |
| JQ Handyman & Concrete LLC | CC-01 | 2026 | Active |
| Jr Drywall LLC | CC-01 | 2022 | Active |
| JS Infinity Construction LLC | CC-01 | 2016 | Renew by Nov 1, 2026 |
| K Excavation And Hauling LLC | CC-01 | 2024 | Renew by Dec 23, 2026 |
| Kaup Construction LLC | CC-01 | 2024 | Active |
| KC Industries Inc | CC-01 | 2003 | Active |
| KC Plumbing Services | CC-01 | 2011 | Active |
| Ken Adams Plumbing Inc | CC-01 | 2024 | Active |
| Kennedy Hardesty Contrng LLC | CC-01 | 2023 | Active |
| Ketelsen Construction Company | CC-01 | 1991 | Active |
| Klicker Enterprises LLC | CC-01 | 2007 | Active |
| Koncrete Industries Inc | CC-01 | 2000 | Active |
| Konen Rock Crushing Inc | CC-01 | 1991 | Active |
| L S Construction | CC-01 | 2012 | Active |
| Lara's Custom Painting LLC | CC-01 | 2018 | Active |
| Licho's Landscape LLC | CC-01 | 2025 | Active |
| Lightfoot's Construction LLC | CC-01 | 2023 | Active |
| Lindsay Professional Srvcs LLC | CC-01 | 2021 | Active |
| Living Space LLC | CC-01 | 2010 | Active |
| Lobos Plastering LLC | CC-01 | 2021 | Active |
| Lofthouse Construction Inc | CC-01 | 2014 | Active |
| Lozano's Remodel LLC | CC-01 | 2017 | Active |
| LPZ Houze Construction LLC | CC-01 | 2022 | Active |
| Ludwig Irrig & Gen Contrng LLC | CC-01 | 2026 | Active |
| Lumber Construction LLC | CC-01 | 2026 | Active |
| Macroberts Construction LLC | CC-01 | 2013 | Active |
| Mahurin Construction LLC | CC-01 | 2015 | Active |
| Many Waters Construction | CC-01 | 2023 | Active |
| Mario's Yard Care | CC-01 | 2017 | Active |
| MCJ Construction LLC | CC-01 | 2019 | Active |
| Mendez Construction LLC | CC-01 | 2020 | Active |
| Mentzer Bros LLC | CC-01 | 2019 | Active |
| Metalcraft Northwest Inc | CC-01 | 2020 | Active |
| Mid Valley Enterprises Inc | CC-01 | 2007 | Active |
| Midland Construction LLC | CC-01 | 2026 | Active |
| Mill Creek Mechanical LLC | CC-01 | 2024 | Active |
| Molina Bros Painting LLC | CC-01 | 2024 | Active |
| Moreno & Nelson Construction | CC-01 | 2007 | Active |
| Mr General Construction LLC | CC-01 | 2018 | Active |
| N & J Diaz Framing | CC-01 | 2006 | Active |
| Nico Electrical Contracting | CC-01 | 2026 | Active |
| NJM Hndmn RPRS & Imprvmnts LLC | CC-01 | 2024 | Active |
| Oasis Landscaping LLC | CC-01 | 2023 | Active |
| Oetman Construction | CC-01 | 2024 | Active |
| Ojcius Lawn Care | CC-01 | 2014 | Active |
| Oltman Brothers Const LLC | CC-01 | 2008 | Active |
| Overhead Door Co / Walla Walla | CC-01 | 2014 | Renew by Dec 8, 2026 |
| Pearce Moody Construction Co | CC-01 | 2016 | Active |
| PFC Home Improvements LLC | CC-01 | 2023 | Active |
| Pina's Roofing LLC | CC-01 | 2022 | Active |
| Porter & Sons Construction | CC-01 | 2010 | Active |
| Powers Refrigeration LLC | CC-01 | 2024 | Active |
| Premier Blinds LLC | CC-01 | 2026 | Active |
| Premier Property Maint LLC | CC-01 | 2026 | Active |
| Pristine Brush Painting LLC | CC-01 | 2023 | Active |
| Progressive Interiors LLC | CC-01 | 2007 | Active |
| Proguard Fence Inc | CC-01 | 2024 | Active |
| Proscapes W2 Inc | CC-01 | 2005 | Active |
| Prutsman Inc | CC-01 | 1980 | Active |
| R And TR Construction LLC | CC-01 | 2012 | Active |
| Rbi Construction LLC | CC-01 | 2007 | Active |
| Real Roofing LLC | CC-01 | 2021 | Active |
| Reiff Manufacturing | CC-01 | 2017 | Active |
| Reyes Brothers Const LLC | CC-01 | 2005 | Active |
| RH General Construction LLC | CC-01 | 2024 | Active |
| Riley Ag Fencing LLC | CC-01 | 2023 | Active |
| Rincon Construction LLC | CC-01 | 2015 | Active |
| Rouse LLC | CC-01 | 2021 | Active |
| Royal Pro Painting LLC | CC-01 | 2026 | Active |
| Rugged Land | CC-01 | 2025 | Active |
| RWB Excavation | CC-01 | 2025 | Active |
| S & K Construction LLC | CC-01 | 2025 | Active |
| S & S Property Maintenance LLC | CC-01 | 2026 | Active |
| Salazar General CNST LLC | CC-01 | 2016 | Active |
| Sanford Design Build | CC-01 | 2023 | Active |
| Settle In Construction LLC | CC-01 | 2018 | Active |
| Signature Fencing | CC-01 | 2025 | Active |
| Simplicity Homes LLC | CC-01 | 2009 | Active |
| Simplistic Customs LLC | CC-01 | 2026 | Active |
| Single Man Construction Inc | CC-01 | 1997 | Active |
| Skyline WW Construction LLC | CC-01 | 2024 | Renew by Dec 26, 2026 |
| Sloan Prutsman Pool Servs LLC | CC-01 | 2021 | Active |
| Small Jobs Walla Walla | CC-01 | 2026 | Active |
| Smith Brothers Industries LLC | CC-01 | 2003 | Active |
| Smith Insulation Inc | CC-01 | 1997 | Active |
| Spinning Arrow Const LLC | CC-01 | 2025 | Active |
| Stonecreek Custom Homes LLC | CC-01 | 2013 | Active |
| Summit Lawn Care LLC | CC-01 | 2020 | Active |
| Sunshine Landscaping LLC | CC-01 | 2026 | Active |
| Sunshine Pools LLC | CC-01 | 2026 | Active |
| Sutherland Enterprises LLC | CC-01 | 2009 | Active |
| Tamarack Trailworks LLC | CC-01 | 2026 | Active |
| Taproot Builders | CC-01 | 2025 | Active |
| Tektoniks Corp | CC-01 | 1987 | Active |
| Thad Sirmon Construction Inc | CC-01 | 2005 | Active |
| The Project By B&K | CC-01 | 2026 | Active |