| Reflection Remodeling LLC | B2 | 2026 | Active |
| Reid Construction & General Contracting | B | 2023 | Active |
| Reliant Construction | B + C8 | 2016 | Active |
| Remcon Design Build Incorporated | B + C8 | 2006 | Active |
| Remodel By Design Inc | B | 2024 | Active |
| Remodel San Diego | B | 2024 | Active |
| Renaissance Development Corp | B | 2004 | Active |
| Renavolt Inc | B + C10 | 2021 | Active |
| Renomerica | B | 2017 | Active |
| Renovat Homes Inc | B + C6 | 2022 | Renew by Dec 31, 2026 |
| Renovation Realty Inc | B | 2011 | Active |
| Rent Ready Inc | B | 2020 | Active |
| Resilient Roofing | B + C39 | 1967 | Active |
| Resilient Roofing Inc | B + C39 | 2018 | Renew by Dec 31, 2026 |
| Resolve Remodeling Inc | B | 2022 | Renew by Dec 31, 2026 |
| Restoration 24 Of San Diego | B + D28 | 2010 | Renew by Dec 31, 2026 |
| Restoration Solutions | B | 2005 | Active |
| Restoration Systems & Consulting Inc | B | 2011 | Active |
| Retaining Walls Company | A | 2003 | Active |
| Reuter Group Inc | B | 2023 | Active |
| Revive Design And Build Inc | B | 2024 | Active |
| Revive Restoration | B + D64 | 2025 | Active |
| Revolution Landscape | B + C27 | 2010 | Active |
| Reycor Inc | B | 2023 | Active |
| Reylos Construction | B | 2022 | Active |
| Reynolds Contracting Inc | B + C33 | 1992 | Active |
| RGLC Inc | B | 2023 | Active |
| RH Construction & Investment Group Inc | B | 2024 | Active |
| Rime Construction Inc | B | 2026 | Active |
| Rise Home Builders | B | 2021 | Active |
| Risk Free Serv LLC | B | 2025 | Active |
| Ritz Design Build | B | 1965 | Active |
| Rivera General Contracting | B | 2006 | Active |
| Robertson Mechanical Inc | B + C20, C36 | 2010 | Active |
| Rocco Inc | B | 2012 | Active |
| Rocha Investments Corp | B | 2025 | Active |
| Rockstar Builders Inc | B | 2008 | Active |
| Rockstar Plumbing Heating And Air Inc | B + C20, C36 | 2013 | Active |
| Rodriguez Roofing & General Contracting LLC | B + C39 | 1992 | Active |
| Rogue Remodeling | B | 2022 | Active |
| Roman Construction & Design Inc | B | 2025 | Active |
| Romeo Construction Inc | B | 2021 | Active |
| Romero Construction & Repair | B | 2026 | Active |
| Rookus & Associates Inc | B | 2020 | Active |
| Rooster Builders Inc | B | 2019 | Active |
| Rore Inc | A, B + HAZ | 2007 | Active |
| Rose Construction | A | 1992 | Active |
| Rosenex | A + C27 | 2025 | Active |
| Rossi Development Inc | B | 2024 | Active |
| Rowe Construction And Energy | B + C10 | 2021 | Active |
| Royal Building Solutions Inc | A, B | 2018 | Renew by Nov 30, 2026 |
| Royal Design Development Inc | B | 2010 | Active |
| Royalty Design & Build Inc | B | 2024 | Active |
| Rsm2 Contractors Inc | A, B | 2003 | Active |
| Ruckle Construction Inc | B | 1953 | Active |
| Ruiz Building Services Inc | B | 2018 | Active |
| Rush Builders Incorporated | B | 2020 | Active |
| Russell D J Construction Inc | B | 1988 | Active |
| RWM Construction Inc | B + C22 | 2016 | Active |
| S D K B Corp | B | 2023 | Active |
| S O P Construction Inc | B | 2022 | Active |
| Sa Painting Services Inc | B + C33 | 2023 | Active |
| Sabatini Construction Inc | B | 2022 | Active |
| Sael Construction Corporation | A, B | 2022 | Active |
| Safe - T - Proof Disaster Preparedness Company Inc | B | 2002 | Active |
| Saffa Contracting Co | B + C20, C36 | 2025 | Active |
| Sage Build Collective | B | 2026 | Active |
| Salomon Construction LLC | B + C9 | 2014 | Active |
| Sampo Mike Inc | A | 1980 | Active |
| San Diego Air Comfort Heating & Air Conditioning Incorporated | B + C20 | 2021 | Active |
| San Diego Builders Inc | B | 2020 | Active |
| San Diego Building Services Inc | A | 2023 | Active |
| San Diego Coast Construction Services | B + C27 | 2019 | Active |
| San Diego Construction Collective | B | 2025 | Active |
| San Diego Contractor And Design Inc | B | 2016 | Active |
| San Diego Damage Restoration Pros | B | 2024 | Active |
| San Diego Doors And Closets Incorporated | B | 2024 | Active |
| San Diego Engineering Inc | A, B + C8, D30 | 2025 | Active |
| San Diego General Construction Inc | B | 2024 | Active |
| San Diego General Contracting Inc | B | 2014 | Active |
| San Diego Handy Ma'Am Inc | B2 | 2026 | Active |
| San Diego Hauling And Demo Inc | B + D63 | 2025 | Active |
| San Diego Home Builders Inc | B | 2024 | Active |
| San Diego Home Improvements | B | 2021 | Active |
| San Diego Home Inspection Inc | B | 2023 | Active |
| San Diego Kitchen & Bath | B | 2023 | Active |
| San Diego Landscaping Remodeling | B | 2025 | Active |
| San Diego Master Painting LLC | B2 + C33 | 2024 | Active |
| San Diego Mechanical Energy | B + C20 | 2014 | Active |
| San Diego Roofing Inc | B + C39 | 1999 | Active |
| San Diego Sewer Contractor 911 Inc | A, B + C36 | 2023 | Active |
| Sancon Property Services Inc | B | 2021 | Active |
| Sandgroper Construction | B | 2023 | Active |
| Sandpoint Construction Inc | B | 1998 | Active |
| Saraay Remodeling LLC | B | 2022 | Active |
| Sass Construction And Design | B | 2020 | Active |
| Saturn Electric Inc | A, B + C10 | 1963 | Active |
| Scflan Corp | B | 2014 | Active |
| Schmidt J R Construction | B | 2010 | Renew by Dec 31, 2026 |
| Schoeffel Construction Inc | B | 1987 | Active |