| 02 Treehouse Construction | B | 2022 | Renew by Dec 31, 2026 |
| Abbey Carpet Of Petaluma | B + C15, C54, D12 | 2020 | Active |
| Acapella Building Contractors | B | 2018 | Active |
| Acrat Plumbing & Heating LLC | B + C10, C20, C36 | 1991 | Active |
| Advanced Alternative Energy Solutions Inc | A + C7 | 2023 | Active |
| Advanced Building Solutions Inc | B + C17 | 2005 | Active |
| All Bay Drilling Inc | A, B | 1997 | Active |
| All Hands Restoration Inc | B | 2025 | Active |
| Allied Restoration Company Inc | B + ASB | 2012 | Active |
| Alpha Dynamic Builders | B | 2022 | Renew by Dec 31, 2026 |
| Alvarado Brothers Construction Inc | B | 2010 | Active |
| Ama Diversfied Construction Group | A | 2010 | Renew by Dec 31, 2026 |
| Amy's Roofing And Solar | B + C10, C39 | 2020 | Active |
| Antonis Construction Building & Painting Inc | B + C33 | 2009 | Active |
| Apex Contractors Inc | B | 1990 | Active |
| Arntz Builders Inc | A, B | 2005 | Active |
| Arteaga Builders Inc | B | 2013 | Active |
| Aurelio's Old World Iron Works | B | 2004 | Active |
| Aztrack Construction Corporation | A | 1995 | Active |
| Bannside Construction Inc | B | 2011 | Active |
| Barry Construction Inc | B | 2006 | Active |
| Bertotti Anthony Landscaping Inc | A, B + C27 | 1979 | Active |
| Black Point Excavation | A | 1999 | Active |
| Blue Moon Builders Inc | B + C27 | 2005 | Active |
| Brownstein Construction Inc | B | 1990 | Active |
| C Hardy General Engineering Contractor Inc | A | 1998 | Active |
| C Merz Excavating & Grading Inc | A + C12 | 2021 | Active |
| Caiati Customs Inc | B | 2000 | Active |
| Cameron D L Construction Inc | B + C8 | 1981 | Active |
| Carpenter & Son's Building Inc | B | 2019 | Active |
| Ceresa Jeff & Son Construction Inc | B | 1996 | Active |
| Chris McDermott Construction LLC | B | 2003 | Active |
| Cinecor Construction LLC | B | 2022 | Active |
| Clearview Construction Inc | B | 2016 | Active |
| Cole Crew Construction | B | 2018 | Active |
| Community First Construction Corp | B | 2007 | Active |
| Conner Consulting & Contracting | B | 2011 | Active |
| Cooney Construction Inc | B | 1979 | Active |
| Creedence Corporation | B | 1998 | Active |
| Critical Control Restoration | B + D38 | 2018 | Active |
| Curran Environmental Services Inc | A, B + ASB, C21, C22 | 1971 | Active |
| D & M Underground Construction Inc | A | 2020 | Renew by Nov 30, 2026 |
| D B I Contracting Inc | B | 2014 | Active |
| Damazio Excavating Inc | A + D21 | 2009 | Active |
| De Jong Construction Inc | B | 2010 | Renew by Nov 30, 2026 |
| De Rutte Builders Corporation | A, B | 1982 | Active |
| Desurra Construction Inc | B | 2016 | Active |
| Division Seven | B + C33 | 1990 | Active |
| Dovetail Building & Design | B | 2016 | Active |
| E F Brett & Company Inc | A, B | 2008 | Active |
| E Rodas Construction Inc | B | 2025 | Active |
| Eames Construction Inc | A, B | 2004 | Active |
| Earth Pop Building Inc | B | 2020 | Active |
| Edwards Construction Services Inc | B | 1992 | Active |
| Eleven Engineering Inc | A, B + C21, HAZ | 2015 | Active |
| Elias Construction Inc | B | 2004 | Active |
| Evenich Construction Inc | B | 1986 | Active |
| Evergreen Builders Inc | B | 2018 | Active |
| Fire Water Mold Remediation | B + D64 | 2021 | Active |
| Frietas Freddie Jr General Contracting And Maintenance Inc | B | 1988 | Active |
| Furuli James Investment Co Inc | B + D63 | 1986 | Active |
| Gabbert Acoustical Inc | B + C2 | 1995 | Active |
| Gasperoni Construction Company | B | 2007 | Active |
| Gawronski Tom Contractor Inc | B | 2009 | Active |
| Gazzoli Construction Inc | B | 2017 | Active |
| Geary Construction | B | 2013 | Active |
| Giovacchini Construction Inc | B | 2000 | Active |
| Goebel Construction Inc | A, B + C12, C16, C21 +3 | 1977 | Active |
| Golden State Lumber Inc | B + C17 | 1998 | Active |
| Goltermann Construction Inc | B | 1974 | Active |
| Grid Titans, LLC | B + C10 | 2025 | Active |
| H & R Building Services Inc | A, B + C27 | 2003 | Active |
| Hegarty Construction Inc | B | 2005 | Active |
| Hernandez Construction Corporation | B | 2023 | Active |
| Hillside General Engineering | A | 2026 | Active |
| Home Hard Builder Inc | B | 2019 | Active |
| Incom Mechanical Inc | B + C4, C16, C36 | 1987 | Active |
| Ironsight Homes Construction Corporation | B | 2025 | Active |
| Ironwood Construction Inc | B | 2023 | Active |
| J & J Custom Builders Inc | B | 2016 | Active |
| J & N Construction | B | 2023 | Active |
| J C General Engineering Contractor Inc | A + C12 | 2018 | Active |
| J E C Stone Inc | B + C29 | 2010 | Active |
| Jac And Brida LLC | B | 2026 | Active |
| JCW General Construction Inc | B | 2025 | Active |
| JG Construction And Sons | B | 2025 | Active |
| JLM Construction Services Inc | B | 2023 | Active |
| John Fechter Construction Inc | B | 2023 | Active |
| JW Construction LLC | B | 2011 | Active |
| K & M Renovations Inc | B | 2020 | Active |
| Kearney & Son Contracting And Consulting Inc | B | 2021 | Active |
| Kearney And O'Banion Inc | B | 1992 | Active |
| Kehr Construction Inc | B | 1984 | Active |
| Keller Charles Construction Inc | B + C12, C34, C42 | 2006 | Active |
| Kintz Builders LLC | B | 2026 | Active |
| Kristensen Enterprises Inc | B | 1997 | Active |
| Larrabure Construction And Design | B | 2016 | Active |
| LCR | B | 2008 | Active |
| LHS Construction LLC | B | 2011 | Active |
| Lind Marine Incorporated | A | 2015 | Active |