| Lewis Mark & Son Construction Inc | B + C36 | 2003 | Active |
| Lido Interiors | B | 2015 | Active |
| Lobos Constructions Inc | B | 2026 | Active |
| Long Beach Community Action Partnership | B | 1991 | Active |
| Long Beach Developers Inc | B | 1982 | Active |
| Long Beach Property Maintenance Inc | B, B2 | 2024 | Active |
| Lovco Construction Inc | A + ASB, C12, HAZ | 1988 | Renew by Nov 30, 2026 |
| LVL General Contracting | B | 2026 | Active |
| Maginn Construction Co | B | 2010 | Active |
| Maldonado Crown | B | 2005 | Active |
| Marina Homes Construction Inc | B | 2002 | Active |
| Marouni Industries Inc | B | 2011 | Active |
| Martinez Gregorio Centennial Roofing LLC | B + C39 | 2022 | Active |
| Master Professional Builders | B | 2018 | Active |
| Masterworks Construction Services Inc | B | 1992 | Active |
| Maverick Construction | B + C10 | 2002 | Active |
| Maycab Companies Inc | B | 2012 | Active |
| Mayfield Environmental Engineering | A + ASB, C27, C49 +1 | 2004 | Active |
| MC Carty Dennis Equipment Inc | A | 2010 | Active |
| MC Grail Services Inc | B + C10, C38, D21 +1 | 2003 | Active |
| McIntyre Gary Construction Inc | B | 2013 | Active |
| Metco Equipment Inc | A | 1970 | Active |
| Mida Industries Inc | B + C20, C21, D38 +2 | 1989 | Active |
| Miguel A Gonzalez Construction Inc | B | 2004 | Renew by Nov 30, 2026 |
| Millennia Development Inc | B | 2023 | Active |
| Millennium Construction Services | B + C10, C36 | 2018 | Active |
| Moldy Construction | B | 2026 | Active |
| Mora Construction | B | 2020 | Renew by Nov 30, 2026 |
| Moya Restoration Inc | B | 2026 | Active |
| MTZ Contractors Inc | B | 2017 | Active |
| Murrieta General Construction Inc | B | 2009 | Active |
| MV Piping Services Inc | A + C34 | 2022 | Active |
| MVP Contractors LLC | A, B | 2019 | Active |
| Nansen Associates Inc | B | 2005 | Active |
| National Plant Services Inc | A + C33, C42, D38 | 1978 | Active |
| ND Construction Company Inc | A, B + C10, C46 | 2000 | Active |
| Neri's General Contractors | B | 2001 | Active |
| Neveling Enterrpises Inc | B | 1994 | Active |
| New Era General Contractor Inc | B + C10 | 2026 | Active |
| Newman Midland Corp | A, B + C36 | 1999 | Active |
| Next Level Construction & Design Inc | B | 2024 | Active |
| Nold's Equipment Inc | A | 2008 | Active |
| Norm Wilson & Sons Inc | B | 1983 | Active |
| Oak Home Renovation Inc | B | 2025 | Active |
| Ocean Blue Environmental Services Inc | A + HAZ | 1995 | Active |
| Ocean Electric Construction | B + C10 | 2013 | Active |
| Ocean Home Solutions Inc | B | 2026 | Active |
| Odigos Construction Inc | A | 2020 | Active |
| Ohka Construction Inc | B | 2025 | Active |
| Olson R Construction Inc | B | 1980 | Active |
| On Point Builders Inc | B | 2009 | Active |
| On Point Building Company LLC | B | 2021 | Active |
| Onsitemike And The Builders Inc | B | 2022 | Renew by Nov 30, 2026 |
| Os-Handyman | B | 2017 | Active |
| Outten Construction Inc | B | 2007 | Active |
| Ov Construction Inc | B + C10, C36 | 2018 | Active |
| Over Powered Construction Inc | B | 2021 | Active |
| P C L Construction Inc | A | 2008 | Active |
| P C M C U S Inc | A, B + C10, C11 | 2006 | Active |
| PA General Construction LLC | B | 2019 | Active |
| Pacific Coast Building & Maintenance | B | 1996 | Active |
| Pacific Crane Maintenance Company LLC | A, B + C10, C11 | 2017 | Active |
| Pacific Diving Inc | A | 2026 | Active |
| Paragon Building Companies LLC | B | 2025 | Active |
| Parallax Building | B + C9 | 2022 | Active |
| Parent Family Crafts & Construction Inc | B | 2024 | Renew by Nov 30, 2026 |
| Park Construction Incorporated | B + C10, D34 | 1978 | Active |
| Patriot Environmental Services Inc | A + HAZ | 2002 | Active |
| Patterson Construction Group Inc | B | 1982 | Active |
| PCL Construction West Coast Inc | A | 2025 | Active |
| Pettigrew Construction Inc | B | 1981 | Active |
| PG Engineering & Environmental Inc | A + HAZ | 2017 | Active |
| Phoenix Construction Service Corporation | B | 2010 | Active |
| Platinum Home Remodeling Inc | B + C10, C20, C36 | 2019 | Active |
| Ponce-Magana General Construction Inc | B | 2026 | Active |
| Poppin Backhoe Service | A + HAZ | 2008 | Active |
| Power Custom Builders Inc | B | 2016 | Active |
| Primerestoration247 Inc | B | 2026 | Active |
| Pro Maintenance | B | 2015 | Active |
| Property Maintenance Solution Of California LLC | B | 2025 | Active |
| Pure Water Constructors | A | 2026 | Active |
| Pyramid Framing Inc | B | 1998 | Renew by Dec 31, 2026 |
| R M C O Construction Inc | B | 2011 | Active |
| R M J Communications Inc | A + C7 | 2010 | Active |
| R3 Pros | B2 | 2022 | Active |
| Rad Building And Development Inc | B + C36 | 2007 | Active |
| Rasic W A Construction Company Inc | A + C34 | 1979 | Active |
| Rebuilt | B | 2020 | Active |
| Recon | A | 1990 | Active |
| Red Diamond Painting & Construction Corp | B + C33 | 2004 | Active |
| Reform Residential Inc | B2 | 2025 | Active |
| Reinhart Builders | B | 2016 | Active |
| Renova General Electrical Inc | B + C10 | 2025 | Active |
| Rice's Concrete Cutting Services Inc | A, B + D06, HAZ | 1992 | Active |
| Right Choice Builders | B | 2004 | Active |
| Rivsan General Construction | B | 2024 | Active |
| Robinson Brothers | B | 1995 | Active |
| Romberg Excavation & Operations Inc | A, B + C12 | 1999 | Active |
| Ronald Electric & Construction Inc | B + C10 | 2001 | Active |
| Royal Refrigeration Services Inc | B + C20, C36, C38 | 2020 | Active |