| MC Murtrey Lince Inc | B + C10, C42 | 2009 | Active |
| MC Sweeney Enterprises Inc | B + C10 | 2011 | Active |
| McAfee Energy And Construction Inc | A, B + C10 | 2022 | Active |
| McDaniels Construction | B | 2022 | Active |
| MD Renovations & Construction | B | 2022 | Active |
| Mechanical Industries Inc | A + C51 | 1994 | Active |
| Medford Construction Inc | B + C8, C51 | 1983 | Active |
| Meraki Builders Inc | B | 2024 | Active |
| Meraki Construction Inc | B | 2021 | Active |
| Merjil's Steel Fabrication Inc | A + C51 | 2003 | Active |
| MFJ Construction Inc | B | 2026 | Active |
| MHR Construction Inc | B | 2026 | Active |
| Michael General Contractors Inc | B | 2010 | Active |
| Mila | B | 2022 | Active |
| Miocene Inc | A | 2019 | Active |
| Mission Mechanical Plumbing Inc | B + C36 | 2009 | Active |
| MJ & A Engineering | A | 2023 | Active |
| Mmi Services Inc | A + D09 | 1994 | Active |
| Moc Incorporated | A, B + C10, D49 | 1990 | Active |
| Modern Valley Construction Inc | A, B + ASB, C10, C15 +1 | 2020 | Active |
| Monarch Home Services | A, B + C10, C20, C36 +1 | 2008 | Active |
| Monarchs Construction Inc | B | 2017 | Active |
| Moonrock Inc | B + C9 | 2003 | Active |
| Moss Dan Construction Inc | B | 2005 | Active |
| Moss Robert B Jr Architectural Specialties | B + D24, D34, D42 | 1982 | Active |
| Motion Construction Inc | B | 2026 | Active |
| Munoz Home Improvement Inc | B2 | 2024 | Renew by Nov 30, 2026 |
| Narbona Construction LLC | B | 2026 | Active |
| National Engineering & Development | A, B + C36 | 2026 | Active |
| NGS Engineering | A | 2026 | Active |
| Nimo's Plumbing Inc | B + C36 | 2017 | Active |
| Nix Grid Inc | A, B + C10 | 2018 | Renew by Dec 31, 2026 |
| Noble Construction Inc | B | 2015 | Active |
| Norcal Electric | B + C10 | 2000 | Active |
| Northwest Construction Services Inc | B | 2026 | Active |
| Nova General Engineering | A | 2026 | Active |
| Nunez Concrete & Masonry Inc | B + C8, C29 | 2020 | Active |
| Oasis Air Conditioning Inc | B + C2, C20, C36 +1 | 1974 | Active |
| Obl Construction LLC | B | 2026 | Active |
| Ogden Steve Concrete Inc | B + C8, C53 | 1985 | Active |
| Old Ironsides Construction Inc | B + C8 | 2021 | Active |
| Old Mill Construction LLC | B | 2024 | Active |
| Old Ranch Construction Inc | B + C8, C10, C12 +2 | 2016 | Active |
| Olvera's Construction Services | B | 2022 | Active |
| Om Management & Business Associates Inc | B | 2020 | Active |
| Oriole Homes Inc | A, B + C8, C12, C29 +2 | 2009 | Active |
| Ortega Builders Inc | B | 1991 | Active |
| Owen Mike Fabrication Inc | A + C51 | 2006 | Active |
| Owens Construction & Engineering Inc | A | 2014 | Active |
| Owens/Maurer Construction Inc | A + C10 | 2016 | Active |
| P I C Development Inc | A | 2021 | Active |
| P I E Con Inc | A + C36 | 2008 | Active |
| Pac-Man Construction Inc | B | 2026 | Active |
| Pacific Coast Construction | B | 2000 | Active |
| Pacific Coast Energy Conservation Services Inc | B + C20, C36 | 2008 | Active |
| Pacific Coast Heating & Air Conditioning | B2 + C20 | 2024 | Active |
| Pacific Construction Services Inc | B | 2010 | Active |
| Pacific Grading & Excavation | A | 2018 | Active |
| Palacios General Contracting Incorporated | B | 2023 | Active |
| Palmer Tank & Construction Inc | A | 1976 | Active |
| Panthera Construction Inc | B | 2026 | Active |
| Par Valley Construction | A, B | 2025 | Active |
| Paramount Restoration Services LLC | B | 2025 | Active |
| Patriot Pipeline | A | 2023 | Active |
| Patterson Electrical Contracting Inc | A, B + C7, C10 | 2019 | Active |
| Paul Davis Of Bakersfield | B | 2025 | Active |
| Pav Engineering | A | 2017 | Active |
| Pavletich Electric And Communications Inc | A, B + C7, C10 | 1996 | Active |
| Pembridge General Construction Inc | B + C39 | 2015 | Active |
| Perfect Builders Inc | B | 2026 | Active |
| Perfection Iron Painting | B + C23, C33, D28 | 1998 | Active |
| Petrini Gregory Homes Inc | B | 2016 | Active |
| Phillips Mechanical & Plumbing Inc | A, B + C4, C36 | 2014 | Active |
| Phoenix Oilfield Maintenance | A | 2025 | Active |
| Platinum Renovatins & Construction | B | 2016 | Active |
| Precision Vinyl Construction | B | 2017 | Active |
| Preferred Power Solutions Inc | A + C10 | 2011 | Active |
| Premier General Builders | B | 2019 | Active |
| Premier Home Improvements | B + C20 | 2024 | Renew by Dec 31, 2026 |
| Prime Tank Resources Inc | A | 2021 | Active |
| Pro Dirt & Equipment Inc | A | 2026 | Active |
| Pro Property Services Inc | B | 2004 | Active |
| Pro Restoration Services Inc | B + C20, C36 | 2011 | Active |
| Process Instruments Inc | B + C10 | 2009 | Active |
| Project Development Solutions Inc | A | 2023 | Active |
| Proven Construction Inc | B | 2026 | Active |
| Puroclean Certified Restoration Specialist | B | 2015 | Active |
| Quantum Industries | A, B + C10 | 2016 | Renew by Dec 31, 2026 |
| R B I Services Inc | A | 2022 | Active |
| R C H Construction | B | 1986 | Active |
| R D M Real Estate Development Inc | B | 2014 | Active |
| R L H Fire Protection Inc | A + C10, C16 | 2000 | Active |
| R&J Accomplished Builders Inc | B | 2025 | Active |
| R&S Construction Builders Inc | B | 2024 | Active |
| Rain For Rent | A + C34, D21 | 2007 | Active |
| Rainbow Restoration Of Bakersfield | B | 2009 | Active |
| Ram Excavation Inc | A | 2024 | Active |
| Ramos Construction & Remodel Inc | B | 2021 | Active |
| Ramsgate Group Inc | A, B + C10 | 2004 | Active |
| Range Of Works Remodeling LLC | B | 2026 | Active |