| Benjamin David Goulart DBA The Waterfall Guy | Waterfall Guy The | — | (510) 410 0445 | Windows, patio, painters | Bayside · Humboldt County | — | — |
| Benson Dakota Mc Mahon Construction | Benson Dakota Mc Mahon | — | (707) 223 1605 | GC, remodel, ADU | Whitethorn · Humboldt County | — | — |
| Bergel Construction | John Eric Bergel | — | (707) 845 0003 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Bertain Construction | Damian Patrick Bertain | — | (707) 834 2714 | GC, remodel, ADU | Fortuna · Humboldt County | — | — |
| Besc INC DBA California Heating | Timothy James Twomey | — | (707) 826 9008 | HVAC | Arcata · Humboldt County | — | — |
| Big Chunks Plumbing | Big Chunks Plumbing | bigchunksplumbing@gmail.com | (707) 719 2835 | Other | Eureka · Humboldt County | — | — |
| Big Foot Construction INC | Erik Karl Johnson | — | (707) 502 6008 | GC, remodel, ADU | Bayside · Humboldt County | — | — |
| Bingham Tile | Bingham Tile | binghamtile@outlook.com | (707) 496 2290 | Other | Eureka · Humboldt County | — | — |
| Black Dog Building | Black Dog Building | — | (707) 616 3788 | GC, remodel, ADU | Bayside · Humboldt County | — | — |
| Black Oak General Contracting | Eugene Corr Callahan | — | (707) 499 1528 | GC, remodel, ADU | Arcata · Humboldt County | — | — |
| Blackwell Construction | Shane Deveroll Blackwell | — | (707) 496 8385 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Blr Construction | Brian Louis Redding | — | (530) 784 3636 | Other | Willow Creek · Humboldt County | — | — |
| Blue Lake Builders | Blue Lake Builders | — | (707) 845 0088 | GC, remodel, ADU | Blue Lake · Humboldt County | — | — |
| Blue Lake Enterprises INC | Jared Steven Downing | — | (707) 845 6262 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Blue Sky | Mark William Friedrich | — | (707) 280 8417 | Other roofers | Mc Kinleyville · Humboldt County | — | — |
| Bluestone Landscapes | Bluestone Landscapes | — | (707) 845 9351 | Windows, patio, painters | Mc Kinleyville · Humboldt County | — | — |
| Bob Downing Electric And Construction | Robert Stewart Downing | — | (707) 498 4892 | Electricians | Whitethorn · Humboldt County | — | — |
| Bob Felter Construction | Fred Robert Felter | — | (707) 834 2058 | GC, remodel, ADU | Mc Kinleyville · Humboldt County | — | — |
| Bob White Electric LLC | Robert Joseph White | — | (707) 443 1511 | Electricians | Eureka · Humboldt County | — | — |
| Bob Wills Construction A Partnership | Robert Francis Will | — | (707) 496 6061 | GC, remodel, ADU | Hydesville · Humboldt County | — | — |
| Bob's Heating And Air Solutions INC | Robert Eugene Iii Secor | — | (707) 798 1997 | HVAC | Eureka · Humboldt County | — | — |
| Bode Construction Company | Ryan David Bode | — | (707) 442 1021 | GC, remodel, ADU | Bayside · Humboldt County | — | — |
| Boechler Builders | Boechler Builders | — | (707) 496 0943 | GC, remodel, ADU | Fortuna · Humboldt County | — | — |
| Bollan Built Construction | Corbett Hugh Bollan | — | (707) 498 5384 | GC, remodel, ADU | Fortuna · Humboldt County | — | — |
| Bollan Construction | Nickolas John Bollan | — | (707) 725 4334 | GC, remodel, ADU | Fortuna · Humboldt County | — | — |
| Bowerman Construction | Dean Edward Bowerman | — | (707) 599 1538 | GC, remodel, ADU | Blocksburg · Humboldt County | — | — |
| Bowser Building | Bowser Building | — | (707) 407 5510 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Brad Vallerga Tile | Brad Vallerga Tile | — | (707) 502 1442 | Other | Arcata · Humboldt County | — | — |
| Brad Wickerd Construction | Bradley Jaye Wickerd | — | (530) 629 4009 | GC, remodel, ADU | Willow Creek · Humboldt County | — | — |
| Brant Electric | Peter Phillip Brant | — | (707) 822 3256 | Electricians | Arcata · Humboldt County | — | — |
| Brea Canyon Construction Company | Robert William Bronkall | — | (707) 845 8767 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Breed Construction | Timothy Shamas Breed | info@breedconstruction.com | (707) 502 5737 | GC, remodel, ADU | Arcata · Humboldt County | — | — |
| Brendan Mc Kenny | Brendan Mc Kenny | — | (707) 443 2244 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Brent Knapek Construction | Brent Jason Knapek | — | (707) 845 3103 | GC, remodel, ADU | Carlotta · Humboldt County | — | — |
| Brian Fallon Paiinting | Brian Fallon Paiinting | — | (707) 839 7045 | Windows, patio, painters | Mc Kinleyville · Humboldt County | — | — |
| Brian Ingram Painting | Brian Ingram Painting | — | (707) 407 5291 | Windows, patio, painters | Bayside · Humboldt County | — | — |
| Brown Builders | Brown Builders | — | (707) 496 7019 | GC, remodel, ADU | Mc Kinleyville · Humboldt County | — | — |
| Bt Metals | Debora Cunningham Shoquist | — | (707) 443 0934 | GC, remodel, ADU | Eureka · Humboldt County | — | — |
| Bud Owings | Bud Owings | — | (415) 816 7348 | GC, remodel, ADU | Blue Lake · Humboldt County | — | — |
| Built By Brandt | Built By Brandt | — | (707) 502 6540 | GC, remodel, ADU | Mc Kinleyville · Humboldt County | — | — |