| Baluster & Crown LLC | RGC | 2021 | Active |
| Bamavi Construction LLC | RGC | 2019 | Active |
| Bamboo Grove LLC | RGC | 2013 | Active |
| Bams Builds LLC | RGC | 2024 | Active |
| Barker & Beyer Woodworking LLC | RGC | 2007 | Active |
| Barkleys General Contracting LLC | RGC + LBPR | 2013 | Active |
| Barnes Mechanical LLC | RGC | 2016 | Active |
| Barraza Drywall Solutions LLC | RGC | 2026 | Active |
| Barrios Roofing & General Contracting LLC | RGC | 2022 | Active |
| Basic Fire Protection Inc | CGC1, RGC | 1985 | Active |
| BCB Enterprises LLC | RGC | 2014 | Active |
| BCR South Portland LLC | RGC + CSC1, LBPR | 2023 | Active |
| BD Mack Inc | CGC1, RGC | 2007 | Active |
| BD Ventures LLC | CGC1, RGC | 2026 | Active |
| Be Market Ready LLC | RGC + LBPR | 2017 | Active |
| Beal Renovation LLC | RGC | 2016 | Active |
| Beam Construction & Management LLC | CGC2 + RD | 1997 | Active |
| Beards Restoration & Remodeling LLC | RGC + LBPR | 2011 | Active |
| Beaudreaux Contracting LLC | CGC2, RGC | 2018 | Active |
| Bedrock Commercial Concrete Cutting LLC | CGC2 + RSC | 2017 | Active |
| Bee Builds LLC | RGC + LBPR | 2025 | Active |
| Bee Remodeling LLC | RGC + LBPR | 2024 | Active |
| Beeghly Restoration LLC | RGC | 2022 | Active |
| Bell Family Construction LLC | RGC + LBPR | 2018 | Active |
| Bella Professional Painting LLC | CGC2, RGC | 2023 | Active |
| Belle Isle LLC | RGC | 2005 | Active |
| Belwood Enterprises LLC | RGC | 2026 | Active |
| Benitez HVAC LLC | RGC | 2025 | Active |
| Benjamin H Jones LLC | RGC | 2022 | Active |
| Bennett Construction LLC | RGC + LBPR | 2019 | Active |
| Berdeja Painting Enterprises LLC | CGC2, RGC + LBPR | 2022 | Active |
| Bess NW LLC | RGC | 2025 | Active |
| Best Coast Construction LLC | RGC | 2025 | Active |
| Best Coast Roofing Inc | RGC | 2017 | Active |
| Best Coat Painting & More LLC | RGC + LBPR | 2020 | Active |
| Best Friend Builders LLC | RGC | 2024 | Active |
| Best Life Property Management LLC | RGC | 2023 | Active |
| Best Life Renovations LLC | RGC + LBPR | 2025 | Active |
| Best Quality Construction Inc | RGC + CSC2 | 2004 | Active |
| Best Remodeling Construction Inc | RGC | 2005 | Active |
| Best Solution Construction LLC | RGC + LBPR | 2023 | Active |
| Best Tile Designer LLC | RGC | 2020 | Active |
| Best Yard & Construction LLC | RGC | 2022 | Active |
| Betancourt Contracting LLC | RGC | 2021 | Active |
| Bethany Electric Co | RGC | 2023 | Active |
| Better Building By Bo LLC | RGC | 2006 | Active |
| Beyond The Limits Construction LLC | RGC | 2014 | Active |
| BH Automation LLC | CGC1, RGC | 2024 | Active |
| Big Bear Construction LLC | RGC | 2019 | Active |
| Big Boy Remodeling LLC | RGC + LBPR | 2013 | Active |
| Big Branch Woodworking LLC | RGC + CSC2 | 2008 | Active |
| Big Quality Masonry LLC | RGC | 2008 | Active |
| Big Works Construction LLC | RGC | 2018 | Active |
| Bigfoot Construction NW LLC | RGC | 2024 | Active |
| Bill Anderson Design LLC | RGC | 2006 | Active |
| Binh Oriental Gardening Inc | RGC | 2010 | Active |
| Binks Seal & Stripe LLC | RGC | 2010 | Active |
| Bird Dog Painting & Restoration LLC | RGC | 2024 | Active |
| Birdsmouth Construction LLC | RGC + LBPR | 2011 | Active |
| Birdsong Arboriculture LLC | RGC | 2021 | Active |
| Black Man Green Plan LLC | CGC2, RGC | 2023 | Active |
| Black Rabbit Design LLC | RGC | 2026 | Active |
| Black Rock Pools LLC | RGC | 2023 | Active |
| Black Star House Renovation LLC | RGC + LBPR | 2026 | Active |
| Black Swan Homes LLC | RGC | 2020 | Active |
| Blackfeet Concrete LLC | RGC | 2018 | Active |
| Blancgonnet LLC | CGC2 | 2008 | Active |
| Blessed Labor LLC | RGC | 2024 | Active |
| Blessing Landscapes LLC | RGC | 2018 | Active |
| Block Construction PDX LLC | RGC | 2016 | Renew by Dec 22, 2026 |
| Block Design Build LLC | RGC | 2022 | Active |
| Block LLC | RGC | 2026 | Active |
| Bloom Build LLC | RGC + LBPR | 2026 | Active |
| Blooming Lawn Services LLC | RGC | 2025 | Active |
| Blue Environmental Containment Inc | CGC2, RGC | 1995 | Active |
| Blue Heron Construction LLC | RGC | 2019 | Active |
| Blue Heron Family Adventures LLC | RGC | 2024 | Active |
| Blue Leaf LLC | RGC + LBPR | 2017 | Active |
| Blue Mountain Construction LLC | CGC1 | 2012 | Renew by Dec 21, 2026 |
| Blue Pools LLC | RGC | 2026 | Active |
| Blue Ridge Craftsman LLC | RGC | 2020 | Active |
| Blue Roof Home Inspections LLC | RGC | 2017 | Active |
| Blue Shepherd Buildworks LLC | RGC | 2026 | Active |
| Blue Sky Commercial Services Inc | RGC | 2020 | Active |
| Bluebeam Construction LLC | RGC | 2026 | Active |
| Bluebell Woodworks LLC | RGC | 2018 | Active |
| Blueline General Construction LLC | RGC | 2017 | Active |
| Bluestone & Hockley Realty Inc | CGC2, RGC | 1989 | Active |
| Bluevine Studio LLC | CGC2, RGC + LBPR | 2014 | Active |
| Board And Bolt Construction LLC | RGC | 2026 | Active |
| Bob Samuels Inc | RGC + LBPR | 2010 | Active |
| Bobrick Plumbing LLC | RGC | 2026 | Active |
| Bodacious Works LLC | RGC | 2024 | Active |
| Boden Store Fixtures Inc | CGC1 | 1990 | Active |
| Bonfire Construction LLC | RGC | 2025 | Active |
| Bonsai Design LLC | CGC1, RGC | 2018 | Active |
| Bora General Contractor LLC | RGC | 2026 | Active |
| Born And Raised Construction LLC | RGC | 2016 | Active |
| Boston Construction LLC | CGC2, RGC | 2016 | Active |
| Both Sides Construction Inc | RGC + LBPR | 2011 | Active |