| M S Elite General Construction Inc | B | 1992 | Active |
| M T Builders & Remodeling Inc | B | 2018 | Active |
| M1 Builds Inc | B | 2025 | Active |
| M1 Construction Corporation | B | 2017 | Renew by Dec 31, 2026 |
| M3 Construction Services Inc | B | 2025 | Active |
| M7 Construction Corp | B | 2021 | Active |
| Maad Construction Group | B | 2026 | Active |
| Mac Construction | B | 2024 | Renew by Dec 31, 2026 |
| Mace Contracting Inc | B | 2016 | Active |
| Mackey Construction LLC | B | 2026 | Active |
| Mackone Development Inc | A, B + C33 | 1989 | Active |
| Madison Real Estate Inc | B | 2015 | Active |
| Mae CM Services Inc | B | 2006 | Renew by Nov 30, 2026 |
| Maf Corporation | B | 2026 | Active |
| Magallan Build LLC | B | 2026 | Active |
| Maingreen Remodel & Construction Inc | B | 2022 | Active |
| Maintenance Concierge Inc The | B + C10, C20, C33 | 2008 | Active |
| Maison Design Build Inc | B | 2020 | Active |
| Malibu Vista Inc | B | 2020 | Renew by Dec 31, 2026 |
| Malkoe Design & Construction | B | 2007 | Renew by Dec 31, 2026 |
| Mam Enterprises Incorporated | B | 2020 | Active |
| Maman & Jal Inc | B | 2025 | Active |
| Mano A Mano LLC | B | 2023 | Active |
| Mantis Construction Corporation | B + C20, C39, C51 +1 | 2024 | Active |
| Marbest Construction Inc | B | 2018 | Active |
| Marco General Construction Inc | B | 2011 | Active |
| Marco's Hauling & Junk Removal Inc | B + D63 | 2017 | Active |
| Marcos Construction Inc | B + C10 | 1994 | Active |
| Marmol Radziner An Architectural Corporation | B + C17, C47, C53 | 1997 | Active |
| Marquel Group Inc | B | 2019 | Active |
| Marseille Construction Inc | B | 2024 | Active |
| Martinez Rivera Plumbing Inc | B + C36 | 2025 | Active |
| Martinko Construction Inc | B | 2014 | Active |
| Mas Design Builders | B | 2022 | Active |
| Mas Developer Company | B | 2024 | Active |
| Mas Real Construction Inc | A, B | 2016 | Active |
| Masami Builders Corp | B | 2009 | Active |
| Mash Builders | B | 2018 | Active |
| Master Brothers Construction Inc | B | 2025 | Active |
| Master Construction Group Inc | B + C8, C33, C39 | 2023 | Active |
| Master Pro Builders Inc | B | 2026 | Active |
| Master Romero Construction | B | 2026 | Active |
| Masterplan Construction Ca LLC | B | 2026 | Active |
| Masters Of Moisture Inc | B | 2024 | Renew by Nov 30, 2026 |
| Mata Construction Services Inc | B | 2004 | Active |
| Maven Design And Construction LLC | B, B2 | 2023 | Active |
| Maya & Sons Developers Inc | B | 2024 | Renew by Nov 30, 2026 |
| Mayas Builders Inc | B | 2020 | Active |
| MB Construction Dewatering Inc | B + D09, D21 | 2021 | Active |
| MBP West Inc | B | 2022 | Active |
| MC Blaine Construction Inc | B | 1991 | Active |
| MC Kenady Construction Inc | B | 2026 | Active |
| McAllister Home Builders Inc | B | 2023 | Active |
| McCormick Universal LLC DBA McCormick Universal Contractor | B | 2025 | Active |
| McCraw Design & Development Inc | B | 2024 | Active |
| McLa Construction Co | B + C10 | 2016 | Active |
| MDL Builders Inc | B + C33 | 2025 | Active |
| Mdo Design Build Inc | B | 2024 | Active |
| MDV General Construction LLC | B | 2026 | Active |
| Meadow Ridge Construction | B + C10, C36 | 2020 | Active |
| Mectec Inc | A, B + C10, C20, C36 | 2004 | Active |
| Medina Lemus Builders Corporation | B | 2023 | Active |
| Medscom Property Development Inc | B | 2004 | Renew by Dec 31, 2026 |
| Meepos Home Builders Inc | B | 2025 | Active |
| Mega Remodeling | B | 2022 | Renew by Nov 30, 2026 |
| Mejia General Contractors Inc | B | 2026 | Active |
| Mejia Sr Construction Inc | B | 2020 | Renew by Nov 30, 2026 |
| Mel's Construction Company | B | 2025 | Active |
| Melana Inc | B | 2021 | Active |
| Mench Construction Inc | B | 2018 | Renew by Dec 31, 2026 |
| Meneses Construction | B | 2017 | Active |
| Mercury Construction Inc | B | 2015 | Active |
| Mereekh Construction | B | 2023 | Active |
| Mergen Construction Inc | B + C7, C10, C33 +1 | 2006 | Active |
| Meridian Developments Inc | B + C10 | 2016 | Renew by Dec 31, 2026 |
| Meridian Precast Inc | B | 2008 | Active |
| Merit Construction & Design | B | 2020 | Renew by Dec 31, 2026 |
| Merrell Design And Build | B | 2021 | Active |
| Metabuild Solutions Inc | B | 2024 | Active |
| Mettle | B | 2022 | Active |
| Mezian Construction Inc | B | 2025 | Active |
| Michael's Construction Company Inc | B + C21 | 2001 | Active |
| Mid-City Construction Inc | B + C33 | 2009 | Active |
| Mikasa LLC | B | 2024 | Active |
| Millbrook Kitchens Inc | B | 2017 | Active |
| Millennium Real Estate Development Inc | B | 2007 | Active |
| Min N Men Remodeling Inc | B | 2023 | Active |
| Minardos Group | B | 1996 | Active |
| Miracle 8 Builders Corp | B | 2025 | Active |
| Mirage Construction Inc | B | 1999 | Active |
| Miranda Construction Inc | B | 2011 | Active |
| Misong Corporation | B + C39 | 1998 | Active |
| Mizcore Developments Inc | B | 2025 | Active |
| Mja Construction Inc | B + C10 | 2023 | Active |
| MJD Construction Group | B | 2020 | Active |
| Mmo General Construction Inc | B | 2026 | Active |
| Modative Build Inc | B | 2011 | Active |
| Modelo Corp | B | 2022 | Renew by Nov 30, 2026 |
| Modern Blue Construction Inc | B | 2011 | Active |
| Modern Development Expert Inc | B + ASB, C10 | 2009 | Active |