| 1 Backflow Plumbing | B + C36 | 2002 | Active |
| 1 Original Construction Inc | B | 1987 | Active |
| 2040 Builders | B | 2018 | Active |
| 21st Century Home Improvement Painting & Roofing | B + C33, C39 | 1993 | Active |
| 24 Hour Construction Inc | B | 2023 | Active |
| 24/7 SF Handyman & Remodeling Service | B2 | 2023 | Active |
| 24/7 Waar General Building Contracting Corp | B | 2024 | Active |
| 2revamp Onsite Inc | B2 | 2026 | Active |
| 3h Builders | B | 2024 | Active |
| 415 Remodeling Inc | B | 2015 | Active |
| 5 Star Plumbing & Rooter | A, B + C36 | 2014 | Active |
| 7 Hills Construction | B + C10 | 2020 | Active |
| 8 Success Construction | B | 2013 | Active |
| A & R Plumbing | A + C36, D56 | 2010 | Active |
| A + General Construction Inc | A, B + C10, C20, C36 | 2024 | Active |
| A - Tech Electric Inc | B + C10 | 2009 | Active |
| A A P T Construction Co | B + C10 | 2010 | Active |
| A C B Inc | B + C33 | 2004 | Active |
| A Construction Co | B | 2026 | Active |
| A E W Engineering Inc | A + HAZ | 2004 | Active |
| A G L Engineering Inc | A + C10 | 2014 | Renew by Dec 31, 2026 |
| A General Engineering Company | A | 2018 | Active |
| A J O Group Build Inc | B | 2018 | Active |
| A M C Builders Inc | B | 2013 | Active |
| A M S Acropolis Construction Incorporated | B | 2017 | Active |
| A R G Conservation Services | B | 2001 | Active |
| A S P Construction & Development | A, B | 2005 | Active |
| A&M Construction & Development Inc | B | 2025 | Active |
| A&M Construction & Remodeling LLC | B | 2026 | Active |
| A-1 Dynamic Builders Inc | B | 2020 | Active |
| A1 Construction Group Corporation | B | 2024 | Active |
| A3 Pipeline | A | 2022 | Active |
| A5 Builders | A, B | 2022 | Active |
| Aak Builders Corp | B | 2025 | Active |
| Abadub Construction Inc | B + C2, C10, C33 +1 | 2019 | Active |
| Abbeyside Construction Inc | B | 2004 | Active |
| Aber Team Inc | B | 2006 | Active |
| Able Handyman & Contractor | B | 2013 | Active |
| Above Engineering Corporation | A, B | 2019 | Active |
| Accm Construction & Development | B | 2026 | Active |
| Ace Building Services | B + C17 | 2024 | Active |
| Ace Drilling Engineering Inc | A, B | 2021 | Active |
| Ace Plumbing & Rooter | A, B + C4, C10, C16 +1 | 2003 | Active |
| Acer-G Engineering | A, B | 2025 | Active |
| Achill Beg Construction Inc | B | 1995 | Active |
| Acme Bay Area Backflow Inc | A + C36 | 2017 | Active |
| Actually Design Build Inc | B + C8 | 2016 | Renew by Dec 31, 2026 |
| Ad Precision Construction Inc | B | 2024 | Active |
| Adamas Builders Inc | B | 2013 | Active |
| Adcon | B | 2004 | Active |
| Add A Garage Inc | A, B | 1992 | Active |
| Added Dimensions Incorporated | B + C9 | 1997 | Active |
| Adept Construction Solutions Inc | A, B + C57, HAZ | 2016 | Active |
| Adilson & Sons Construction | B | 2024 | Active |
| Adler Builders Inc | B | 2024 | Active |
| Adonay Construction LLC | B | 2026 | Active |
| Aequitas Constructors Inc | B | 2003 | Active |
| Agbayani Construction Corporation | A, B + C10, C20, C36 | 1992 | Active |
| Akirsch Construction | B | 2021 | Active |
| Al's Remodeling Inc | B | 2023 | Active |
| Albion Power Company Inc | B + C10, C46 | 2006 | Active |
| Alder Construction Ca | B | 2021 | Active |
| Alec Morgan Construction Inc | A | 2026 | Active |
| Alex Construction & Electric Inc | B + C10 | 2008 | Active |
| Alfa Building Solutions Inc | B | 2010 | Active |
| All Bay Cities Construction | B | 2006 | Active |
| All Bay Solar Construction Inc | B + C10, C39, C46 | 2011 | Active |
| All Trusty Builders | B + C10 | 2008 | Active |
| All-Electric California | B + C10, C20, C36 | 2021 | Active |
| Alliance Plumbing Works Inc | B + C36 | 2006 | Active |
| Allied Teamwork Construction Inc | B | 2005 | Active |
| Allstream Construction LLC | B | 2026 | Active |
| Alpha Bay Builders Inc | A, B + C4, C10, C16 +1 | 1993 | Active |
| Alpha Construction & Solutions Inc | B + C10, C36 | 2019 | Active |
| Alt Construction Group LLC | A, B | 2026 | Active |
| Alta Construction Group Inc | B | 2024 | Active |
| Alta Group Inc | A + C50 | 2004 | Active |
| Alvarez Construction & Tile Inc | B + C54 | 2005 | Active |
| Alwyn Construction Inc | B | 2022 | Renew by Nov 30, 2026 |
| Amac Electrical | B + C10 | 1986 | Active |
| Amber - Tru Construction Inc | A, B | 2006 | Active |
| Ambrocio Construction Inc | B | 2026 | Active |
| Amherst Associates Construction Management Inc | A, B + C10, C16, C27 +2 | 2002 | Active |
| Amone Corp | B | 1997 | Active |
| An Dun Construction SF Inc | B | 2008 | Active |
| Ancgc Inc A New Concept General Construction | B + C33 | 2016 | Active |
| Anco Iron & Construction Inc | B + C51 | 1998 | Active |
| Anderson Design Build | B | 2024 | Active |
| Andrew Mark Construction Inc | B | 2008 | Active |
| Andy HL Construction Inc | B + C16, C36 | 2024 | Active |
| Angotti & Reilly Inc | A, B + ASB, HAZ | 1985 | Active |
| Antormen Inc | B | 2024 | Active |
| Anwire LLC | B + C10 | 2024 | Active |
| Apex Construction And Consulting Inc | B | 2026 | Active |
| Apex Electric & Air | A, B + C10, C20, C51 | 2003 | Active |
| Apex General Builder Inc | A, B + C10, C16, C20 +1 | 2026 | Active |
| Apollo Construction Company Inc | B | 1978 | Active |
| Appetite For Construction Inc | B | 2009 | Active |
| Applied General Construction Inc | B | 2022 | Active |
| Arana Group Inc | A, B | 2004 | Active |