| Integrated Cryogenic Solutions LLC | A, B + C10 | 2020 | Active |
| Interior Refinishing Inc | B | 2024 | Active |
| Intone Coatings And Finishes LLC | B + C33 | 2024 | Active |
| Italian Artisan Inc | B + C29, C54 | 2016 | Active |
| J D Construction | B | 2019 | Active |
| J D T Development Inc | B | 2007 | Active |
| J G E Construction Inc | B | 2026 | Active |
| J T Construction And Development Inc | B | 2012 | Active |
| J T Y Window And Door Specialist | B + C17 | 2007 | Active |
| J'Nr Restoration Contractor Inc | B2 | 2026 | Active |
| Jauregui & Culver Inc | A, B + C10, C21, C36 +2 | 1995 | Active |
| Jav Constructions Inc | B | 2021 | Active |
| Jay-Vee Construction Inc | B + ASB | 1995 | Active |
| JDP Remodeling | B2 | 2024 | Active |
| JH Construction | B | 2024 | Active |
| JLR Builders Inc | B | 2025 | Active |
| JM Construction & Remodeling Inc | B | 2022 | Renew by Nov 30, 2026 |
| Jpa Crossstorm Engineering Inc | A | 2025 | Active |
| K N W Construction Inc | B | 1979 | Active |
| King & Sun Construction Inc | B | 2024 | Active |
| King Custom Metal Inc | B + C23, C51 | 2013 | Active |
| Kitchen Face - Lifters Inc | B | 1987 | Renew by Nov 30, 2026 |
| Ko Olina Industries | B | 2018 | Active |
| L B Civil Construction Incorporated | A, B + HAZ | 2006 | Renew by Dec 31, 2026 |
| L B L Constructors | B + C6, C10, C36 | 1999 | Active |
| L C Paving & Sealing Inc | A, B + C12 | 1991 | Active |
| LDC Construction | B | 2025 | Active |
| Left Coast Concepts Inc | B + C20 | 2017 | Active |
| Left Coast Remodeling Inc | B | 2023 | Active |
| Leon's Construction Inc | B | 2022 | Active |
| Lister Doug Construction Inc | B | 2004 | Renew by Nov 30, 2026 |
| Lister R C Construction Inc | B | 2001 | Active |
| LNV Construction Inc | B | 2023 | Active |
| Long's Welding & Iron Works Inc | B + C51 | 2002 | Active |
| Loth And Son Construction Inc | B | 2024 | Active |
| Lp&R Construction Inc | B | 2020 | Active |
| LPZ Specialties | B + D28, D34 | 2025 | Active |
| Lupe Pina Construction Inc | B + C5 | 2017 | Active |
| M G E Custom Painting | B + C33 | 2005 | Active |
| M R H Pro Construction & Painting Inc | B + C33 | 2019 | Active |
| M S B Inc | B | 1983 | Active |
| M V W General Contractors Inc | B + C2 | 2010 | Active |
| Mac Development Inc | B + C29 | 2022 | Active |
| Maddox Gary Construction Inc | B | 1990 | Active |
| Maid Fast Construction Inc | B + C33 | 2011 | Active |
| Make It Right Works | B | 2017 | Active |
| Malone Tile Design Inc | B2 + C54 | 1994 | Active |
| Marathon General Inc | A | 1988 | Active |
| Marcon Engineering Inc | A, B + C8 | 1991 | Active |
| Masing Construction Inc | B | 1987 | Active |
| Master Craftsman Builders Inc | B | 2011 | Active |
| Mastercare Restoration Inc | B + C15 | 2005 | Active |
| MC Cluskey Construction | B | 2005 | Active |
| MC Cullough Plumbing Inc | A, B + ASB, C8, C36 +1 | 1989 | Active |
| MC Mahon Engineering Construction | A | 2015 | Active |
| McI Contracting | B + C8 | 2023 | Active |
| Meridian Industries LLC | A, B + C21 | 2026 | Active |
| Method Development Corp | B | 2012 | Renew by Nov 30, 2026 |
| Midwest Handyman | B2 + D06 | 2024 | Active |
| Mielgerd Development Corp | B | 2023 | Active |
| Mill Shop Inc The | B | 2019 | Active |
| Mintin Group | A | 2025 | Active |
| Mirabella Design Build | A, B | 1993 | Active |
| Mission Pools | B + C53 | 1976 | Active |
| MLZ Construction | B | 2024 | Active |
| Modern Builder Solutions Inc | B | 2025 | Active |
| Modern Edge Construction Inc | B | 2026 | Active |
| Moretti Construction Inc | B + C15, C54 | 1996 | Active |
| Morgan Trent Construction Inc | B | 2016 | Active |
| Mr General Engineering Inc | A | 2021 | Active |
| MSB Building & Restoration | B | 2005 | Active |
| MSG Contracting And Design | B + C33 | 2010 | Active |
| N & D Construction | B | 2003 | Active |
| Namenyi Luxury Construction Inc | B + C6 | 2025 | Active |
| Namenyi's Construction Inc | B + C6 | 2014 | Active |
| Neitzel Construction LLC | B + C54 | 2020 | Active |
| Next Level Pier Foundations Inc | A | 2021 | Active |
| Northrop Construction Inc | B | 2004 | Active |
| Nuhome Construction LLC | B | 2025 | Active |
| Nuvex Construction Inc | B | 2025 | Active |
| O & M Masonry Inc | B + C29 | 2024 | Active |
| Olivera Construction | B | 2021 | Renew by Nov 30, 2026 |
| Oregon Trail Remodeling & Restoration Inc | B | 2015 | Active |
| Org San Diego | B | 2008 | Active |
| Out West Builders Inc | B | 2020 | Active |
| Overhaul Construction And Repair Inc | B | 2023 | Active |
| P K & R Construction Inc | B | 2007 | Renew by Dec 31, 2026 |
| Pacific Sunset Construction Inc | B | 2022 | Active |
| Palla Construction Inc | B | 2021 | Active |
| Pandawhite Inc | B | 2017 | Active |
| Passion Builders Inc | B | 2022 | Active |
| Pdplay | B + D12, D34 | 1994 | Active |
| Perpetual Creations Remodeling Inc | B2 | 2025 | Active |
| Pina Construction Inc | B + C5 | 2010 | Active |
| Piperin Corporation | A, B | 2011 | Active |
| Pit River Construction Inc | B + C10 | 2009 | Active |
| Polar AC | B2 + C20 | 2025 | Active |
| Power United Construction Inc | B | 2025 | Active |
| Prava Construction Services Inc | A, B + C8 | 2006 | Active |
| Precision Concrete Construction Inc | A, B + C8 | 1984 | Active |