| Pinner Construction Co Inc | A, B | 1957 | Active |
| Platinum Builders | B | 2017 | Active |
| Pool Connection Inc The | B + C8, C29, C53 | 2020 | Active |
| Pooles Construction Incorporated | B + C9 | 1996 | Active |
| Post Bros Construction Co | A | 2021 | Active |
| Power One LLC | A, B + C21, C22, C34 +3 | 2017 | Active |
| Power Plus | B + C10, D31 | 2013 | Active |
| Prado General Construction Inc | B | 2015 | Active |
| Precision General Construction Inc | B | 2017 | Active |
| Preferred Concept Inc | B | 1990 | Active |
| Premium Zone General Construction Inc | B | 2021 | Active |
| Prestige Construction Enterprises Inc | B + C10, C33, C36 | 2007 | Active |
| Prestige Design Center | B + C10, C54 | 2014 | Active |
| Primacast Construction LLC | B + C8 | 2025 | Active |
| Prime Enc Inc | B + C20, C36, C39 +1 | 2014 | Active |
| Pro Home Improvement And Repair Corp | B + C20 | 2016 | Active |
| Pro Quality Plumbing Heating & Air | B + C20, C36 | 1991 | Active |
| Pro Restoration Inc | B | 2025 | Active |
| Pro Service Maintenance Inc | B | 2025 | Active |
| Pro Star Mechanical Services | B + C4, C20 | 2009 | Active |
| Pro-Team Construction | B + C10 | 1983 | Active |
| Producers Construction Inc | B | 2025 | Active |
| Promise Land General Construction Inc | B | 2018 | Active |
| Pros Construction | B | 2025 | Active |
| Protech Construction And Restoration | B + C39 | 2025 | Active |
| Protech Seal Construction Inc | B | 2015 | Active |
| Pulse Heating And Air Corp | A, B + C10, C20, C36 | 2025 | Active |
| Puroclean Emergency Restoration Inc | B | 2010 | Active |
| Pyramid Construction Inc | B | 2015 | Active |
| Quality Construction Services | B + C2, C39, D64 | 2023 | Active |
| Quality Preferred Construction Inc | B | 2024 | Active |
| Quality Sprayers Inc | B + C27 | 1997 | Active |
| R & M Electrical Contracting | A + C10 | 2002 | Active |
| R C D Construction | B | 2022 | Active |
| R C K Services Inc | B + C10 | 1993 | Active |
| R C Pro Construction Services | B | 2022 | Active |
| R Construction Group Inc | B + C33 | 2025 | Active |
| R D L Site Construction Inc | A | 2015 | Active |
| R J Construction | B | 2006 | Active |
| R J Construction | B | 2009 | Active |
| R M G Construction & Home Improvement Inc | B | 2015 | Active |
| R M P Remodeling Inc | B | 2006 | Active |
| R N A L Construction | B | 2023 | Active |
| R V Concrete Inc | A, B + C8 | 2008 | Renew by Nov 30, 2026 |
| R&M General Construction | B | 2022 | Active |
| R-3 Contractors Inc | A + HAZ | 1991 | Active |
| Ram1 Construction Inc | B | 2022 | Active |
| Rdcnm Systems Inc | B | 2020 | Active |
| RDG Construction Services Inc | B | 2014 | Active |
| Realhomes Construction Inc | B | 2026 | Active |
| Refresh My View Contracting | B2 | 2025 | Active |
| Reliable Construction Unlimited Inc | B + C17, C21 | 2003 | Active |
| Reliable Maintenance Solutions | B | 2024 | Renew by Nov 30, 2026 |
| Remodeling Solutions Inc | B | 2025 | Active |
| Renaissance Builders Inc | B | 1991 | Active |
| Restoration Management Services Corp | B | 2021 | Active |
| RGS Landscape & Arbor Care | B + C27, D49 | 1985 | Active |
| Right Angle Solutions Inc | A, B + C36, C42, HAZ | 2010 | Active |
| Right Zone General Contracting | B | 2025 | Active |
| Rivera General Builders | B | 2026 | Active |
| RN Pimentel Constructionn | B | 2022 | Active |
| Roberson Waite Electric | A, B + C10 | 2013 | Active |
| Roberson Waite Electric LLC | A, B + C10 | 2026 | Active |
| Rodriguez Development Company | B | 2023 | Active |
| Romen Construction Corporation | B | 2019 | Active |
| RPS Rental Properties Services | B | 2025 | Active |
| RQS Construction Inc | B | 2023 | Active |
| Ruiz Brothers & Associates Inc | B | 2015 | Active |
| RVM Construction Inc | B + C36 | 1990 | Active |
| Rys Construction Inc | B | 2023 | Active |
| S & R Builds Inc | B | 2024 | Active |
| S D Organized Home Construction | B | 2019 | Active |
| S F Shield Inc | B + C8, C10, C36 +1 | 2019 | Active |
| S J F Construction Inc | B | 1999 | Active |
| S P C Builder Inc | B + C10 | 2016 | Renew by Nov 30, 2026 |
| Saintal Construction LLC | B | 2024 | Active |
| Salsbury Engineering Inc | A + C12, C21, HAZ | 1989 | Active |
| Sanchez L Construction | B | 2020 | Renew by Nov 30, 2026 |
| Sandoval Construction Corp | B | 2026 | Active |
| Sanel Construction Inc | B | 2026 | Active |
| Sasser Restoration | B + C22 | 2022 | Active |
| Seating Component Manufacturing Inc | B | 1999 | Active |
| Seaver Construction | B | 2025 | Active |
| Seismic West Construction | B + C8, C51 | 2018 | Active |
| Select Electric Inc | A, B + C7, C10 | 1974 | Active |
| Select Home Improvements Inc | B + C20 | 2018 | Active |
| Selvaggi Built Inc | B | 2021 | Active |
| Servpro Of Anaheim Central / Garden Grove East | B | 2020 | Active |
| Servpro Of Yorba Linda/Brea | B | 2020 | Active |
| Shielding Technologies Inc | B | 2007 | Active |
| Shoreline Construction | B + D50 | 2016 | Active |
| Shoreline Striping Services Inc | B + C32 | 2011 | Active |
| Shower Walls Inc | B + D34 | 1994 | Active |
| Sierra Roof Inc | B + C39 | 2011 | Active |
| Signature Design Center | B | 2008 | Renew by Nov 30, 2026 |
| Silver Lining Restoration | B | 2014 | Active |
| Simin Incorporated | B + C15, C54 | 1990 | Active |
| Sixtwentyone LLC | B | 2022 | Renew by Dec 31, 2026 |
| Sky Rider Equipment Company Inc | A + D39 | 1984 | Renew by Nov 30, 2026 |
| SMS Custom Cabinets | B | 2025 | Active |