| Hartwig Builds INC | Karen Elizabeth Hartwig | keh@hartwigbuilds.com | (510) 220 1012 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Harvey Electric | Harvey V Iii Scatena | — | (510) 538 6501 | Electricians | Castro Valley · Alameda County | — | — |
| Hasbrouck Construction Company | Gary Marshall Hasbrouck | — | (510) 681 4423 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Hatton's Crane & Rigging INC | Gary Michael Hatton | — | (510) 670 0373 | Other | Hayward · Alameda County | — | — |
| Hawana Construction LLC | Satpal Singh | — | (510) 952 6702 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Hawk Builders INC DBA Hawk Development | Michael Stuart Sanderson | — | (925) 294 4400 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Hayward Electric Company | William Bryce Aydelotte | info@haywardelectric.com | (510) 783 2994 | Electricians | Hayward · Alameda County | — | — |
| Hayward Painting Building Maintenance | Hayward Painting Building Maintenance | — | (510) 385 8364 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Hayward Plumbing & Rooter | Hayward Plumbing & Rooter | — | (510) 566 8143 | Other | Hayward · Alameda County | — | — |
| Hayward Pro Painting | Hayward Pro Painting | — | (510) 434 6623 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Hb Construction Services INC | Benny Huang | — | (510) 388 9899 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Hbc Construction | Hill De Leon | — | (650) 444 2017 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Hbm Construction INC | Henry Yun Hong Mak | — | (415) 688 9869 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Hc Construction INC | Haixu Chen | — | (510) 326 3667 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Hc Construction LLC | Haixu Chen | — | (510) 326 3667 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Hd Drywall INC | Henrique Daniel Dias | — | (510) 760 6343 | Other | Castro Valley · Alameda County | — | — |
| Hd Flooring | Hd Flooring | — | (510) 463 7775 | Other | Oakland · Alameda County | — | — |
| Hd Flooring LLC | Hao Quoc Diep | — | (510) 463 7775 | Other | Oakland · Alameda County | — | — |
| Hd Landscaping | Dung Tan Huynh | — | (510) 861 4613 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Hdh Floors | Hdh Floors | — | (510) 590 1288 | Other | Oakland · Alameda County | — | — |
| Headwaters Landscape | Headwaters Landscape | kemp.hardscape@gmail.com | (510) 717 4274 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Hearney Construction | John Michael Hearney | — | (510) 632 1229 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Heat Transfer Systems Corporation | Raymond Bryan Di Giuseppe | — | (925) 456 0600 | Other | Livermore · Alameda County | — | — |
| Heath Tractor INC | Tim Heath | — | (510) 357 6121 | Other | San Leandro · Alameda County | — | — |
| Heather & French Painting,inc | Jill Monique French | — | (415) 282 6244 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Heating And Air Experts LLC | Omr Tawfeeq Tamimi | — | (510) 518 8470 | HVAC | Fremont · Alameda County | — | — |
| Heating Experts | Heating Experts | sales@the-building-group.com | (510) 593 3818 | HVAC | Oakland · Alameda County | — | — |
| Heavenly Heating & Air INC | Kenneth Dmarco Holmes | — | (415) 767 8805 | HVAC | Oakland · Alameda County | — | — |
| Heavylux INC | Jerry Joe Jr Kinnaman | info@heavylux.com | (510) 667 0781 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Heco Pacific Manufacturing INC | Peter Vincent Chabot | — | (510) 487 1155 | Other | Union City · Alameda County | — | — |
| Hector Lopez | Hector Lopez | hallo@hectorlopez.de | (510) 798 4300 | HVAC | Fremont · Alameda County | — | — |
| Hector's Construction Company | Hector Jauregui Jauregui | — | (510) 534 3571 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Heima Builder | Heima Builder | — | (925) 285 9644 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Heirloom Home & Garden | Heirloom Home & Garden | — | (925) 858 7021 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Heirloom Roofing Services INC | Oliveros German Lara | — | (510) 363 7935 | Other roofers | San Leandro · Alameda County | — | — |
| Heji Builders INC | Ben Peng | — | (408) 637 1996 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Hencon Construction | Joseph Lawrence Hendricks | — | (925) 890 1231 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Henninger Engineering | Henninger Engineering | — | (925) 577 5269 | Other | Livermore · Alameda County | — | — |
| Henry Ford Custom Builder | Henry Ford Custom Builder | — | (510) 375 3436 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Henry Zi Chen | Henry Zi Chen | — | (510) 612 7067 | Electricians | Oakland · Alameda County | — | — |