| Horizon Plumbing INC | Rigoberto Pascual Andrade | — | (510) 932 8208 | Other | Richmond · Contra Costa County | — | — |
| Hornet Demolition | Hornet Demolition | hornetdemolition@gmail.com | (510) 778 2679 | Other | El Sobrante · Contra Costa County | — | — |
| Hortas Trucking L L C | Edgar Horta | — | (916) 743 8028 | Other | Concord · Contra Costa County | — | — |
| Horticultural Services Ltd | Christopher Donzel Chapman | — | (925) 254 1459 | Tree | Orinda · Contra Costa County | — | — |
| Hossam Mohamed Aly | Hossam Mohamed Aly | — | (925) 330 0452 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Hot Line Construction INC | Carol Grace Bade | — | (925) 634 9333 | Electricians | Brentwood · Contra Costa County | — | — |
| Hot Watts Technology | Hot Watts Technology | info@hotwattstechnology.com | (510) 508 4466 | Electricians | El Cerrito · Contra Costa County | — | — |
| Hot Wires Electric | Issac George Rivera | — | (925) 818 3395 | Electricians | Concord · Contra Costa County | — | — |
| Hott Electric LLC | Edward Christopher Loe | — | (925) 768 2820 | Electricians | Pleasant Hill · Contra Costa County | — | — |
| House & Heart INC | Shahar Sharaby | — | (510) 610 2740 | GC, remodel, ADU | Alamo · Contra Costa County | — | — |
| Housemaster Serving Bay Area | Housemaster Serving Bay Area | — | (925) 864-4012 | Inspectors | Brentwood · Contra Costa County | — | — |
| How To's Construction Company | Hao Van Tu | — | (510) 589 0974 | GC, remodel, ADU | Hercules · Contra Costa County | — | — |
| Howard Butler Electric | Howard Wayne Butler | — | (925) 383 8242 | Electricians | Clayton · Contra Costa County | — | — |
| Howard's Earth Boring Service INC | Calvin Scott Howard | — | (925) 766 0065 | Other | San Ramon · Contra Costa County | — | — |
| Howell Landscape Construction INC | Perrin Dana Howell | — | (925) 393 9314 | Windows, patio, painters | Walnut Creek · Contra Costa County | — | — |
| Hqr Air INC | Lynelle Dawn Wood | — | (925) 503 0070 | HVAC | Concord · Contra Costa County | — | — |
| Hrg Construction | Hernandez Gonzalez Omar | sales@hrgconstruction.com | (510) 915 3157 | GC, remodel, ADU | San Pablo · Contra Costa County | — | — |
| Hs Flooring | Hs Flooring | — | (925) 436 8417 | Other | Pittsburg · Contra Costa County | — | — |
| Hsd Pavers INC | Elvis Israel Alvarado | hsdpavers@hotmail.com | (510) 837 0858 | Other | San Pablo · Contra Costa County | — | — |
| Hsp Construction | Hao Si Pham | — | (510) 424 5628 | GC, remodel, ADU | Hercules · Contra Costa County | — | — |
| Hsr | Rafi Benbenishti | — | (925) 215 4603 | Other | Martinez · Contra Costa County | — | — |
| Hubbard Family Construction INC | Charles Burke Hartline | hubbardfamilyconstructionllc@gmail.com | (925) 308 3633 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Hudson Excavation INC | Steve Earl Hudson | info@hudsonexcavation.com | (925) 666 8966 | Other | Brentwood · Contra Costa County | — | — |
| Huff General Engineering | John Anthony Ii Moffat | — | (925) 360 0984 | Other | Walnut Creek · Contra Costa County | — | — |
| Huffman Tile & Marble | Huffman Tile & Marble | — | (925) 413 4045 | Other | Pittsburg · Contra Costa County | — | — |
| Hugh Armand Donatello | Hugh Armand Donatello | — | (925) 339 3807 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Hui Built | Hui Built | — | (650) 438 3345 | GC, remodel, ADU | Alamo · Contra Costa County | — | — |
| Hui Kuang Luo | Hui Kuang Luo | — | (415) 987 7373 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Humberto Martinez | Humberto Martinez | — | (925) 812 2077 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Hummingbird Development LLC | Jevon Chan | — | (925) 515 6791 | GC, remodel, ADU | Pleasant Hill · Contra Costa County | — | — |
| Hummingbird General Engineering | Hummingbird General Engineering | — | (510) 948 9750 | Other | Hercules · Contra Costa County | — | — |
| Humphrey Plumbing | Humphrey Plumbing | — | (925) 451 5344 | Other | Walnut Creek · Contra Costa County | — | — |
| Hung Cheong Siu | Hung Cheong Siu | — | (510) 708 9898 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| Hung Construction Builder INC | Anthony Wai Cheung Chan | — | (510) 812 8558 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Hung Tran | Hung Tran | — | (408) 595 8088 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Hung Tran | Hung Tran | — | (408) 595 8088 | Other | San Ramon · Contra Costa County | — | — |
| Hunt Masonry INC | Barry Todd Sr Schwitters | info@huntmasonry.com | (925) 755 1284 | Other | Concord · Contra Costa County | — | — |
| Hunter-brooke Builder | Hunter-brooke Builder | — | (914) 806 6462 | GC, remodel, ADU | Clayton · Contra Costa County | — | — |
| Huntson Construction | Robert Rafael Feher | admin@huntsonconstruction.com | (925) 826 2108 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Hurst Plumbing Service Construction | Todd Vaughn Hurst | — | (925) 240 7790 | Other | Brentwood · Contra Costa County | — | — |