| Harrison Tile INC | Adam Lloyd Hooey | — | (925) 766 7896 | Other | Walnut Creek · Contra Costa County | — | — |
| Harvest Builders | Harvest Builders | — | (925) 825 4954 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Hasan Hardwood Floors Company | Basic Hasan | — | (510) 867 8920 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Hase INC | Edward Peter Jr Zappettini | — | (510) 504 2728 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Hassler Heating And Air Conditioning LLC | Michael Donavan Hassler | — | (510) 848 3030 | HVAC | El Cerrito · Contra Costa County | — | — |
| Hatcher Painting | Hatcher Painting | — | (925) 726 7978 | Windows, patio, painters | Discovery Bay · Contra Costa County | — | — |
| Hatfield Tile | Hatfield Tile | — | (925) 837 6031 | Other | Alamo · Contra Costa County | — | — |
| Hatley Construction Company | Frank William Hatley | — | (925) 360 2655 | GC, remodel, ADU | Clayton · Contra Costa County | — | — |
| Hatton's Construction | Steven Lynn Hatton | — | (925) 980 6545 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| Hatz Electric | Godfrey Olusegun Ahazie | info@hatzelectric.com | (844) 466 6640 | Electricians | Lafayette · Contra Costa County | — | — |
| Hatz Electric INC | Godfrey Olusegun Ahazie | info@hatzelectric.com | (925) 759 3549 | Electricians | Lafayette · Contra Costa County | — | — |
| Haven Construction INC DBA Haven Development | Timothy Eugene Shannon | — | (925) 854 7667 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Hawkins Pools | John Charles Rosenberg | — | (925) 415 5243 | GC, remodel, ADU | Pacheco · Contra Costa County | — | — |
| Hawks Earthwork And Paving | Jonathan Abisai Gonzalez | — | (925) 658 8584 | Other | Concord · Contra Costa County | — | — |
| Hawksley Masonry INC | Donald Gordon Hawksley | — | (925) 754 5641 | Other | Antioch · Contra Costa County | — | — |
| Hc Construction | Gustavo Eduardo Huerta Castro | — | (925) 864 5738 | GC, remodel, ADU | Pittsburg · Contra Costa County | — | — |
| Hdbaths | Hassan Yusuf Djudjo | — | (925) 525 8490 | GC, remodel, ADU | Pleasant Hill · Contra Costa County | — | — |
| Hdz General Building | Hdz General Building | — | (415) 240 8752 | GC, remodel, ADU | Antioch · Contra Costa County | — | — |
| Hearthstone Building & Restoration | Jeffrey Kirk Bullock | — | (925) 525 9055 | HVAC | Walnut Creek · Contra Costa County | — | — |
| Heavenly Tree Service | Alvarez Eduardo Hernandez | — | (925) 658 8438 | Other | Concord · Contra Costa County | — | — |
| Hector Ruiz Company | Hector Perez Ruiz | — | (510) 453 6149 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Hector Tavera | Hector Tavera | — | (510) 809 5590 | Electricians | Richmond · Contra Costa County | — | — |
| Hein Lighting And Electric Incorporated | James Dean Hein | — | (925) 939 1528 | Electricians | Martinez · Contra Costa County | — | — |
| Heirloom Heating And Air LLC | Michael James Hudley | — | (510) 514 4639 | HVAC | El Sobrante · Contra Costa County | — | — |
| Heldy Andrade Painting INC | Heldy Francisco Andrade | — | (650) 274 4866 | Windows, patio, painters | San Pablo · Contra Costa County | — | — |
| Helping Hands Home Maintenance & Repairs | John William Tebbets | — | (925) 813 0524 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Hemdan Developers | Hemdan Developers | — | (925) 705 1163 | Electricians | San Ramon · Contra Costa County | — | — |
| Henderson & Son Painting | Henderson & Son Painting | — | (925) 639 5289 | Windows, patio, painters | Pleasant Hill · Contra Costa County | — | — |
| Hennessey's Construction And Fence | Ona Ann Hennessey | — | (925) 516 6601 | Other | Brentwood · Contra Costa County | — | — |
| Henry & Lemoine Electric | Willie Deon Henry | — | (833) 443 2323 | Electricians | Danville · Contra Costa County | — | — |
| Henry Nguyen | Henry Nguyen | — | (510) 703 1138 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Henry Ward Construction INC | Henry Thomas Ward | — | (510) 730 9146 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Henry Wong | Henry Wong | — | (510) 928 7478 | GC, remodel, ADU | San Pablo · Contra Costa County | — | — |
| Henson Drywall | Henson Drywall | floydhensondrywall@gmail.com | (510) 837 5075 | Other | El Cerrito · Contra Costa County | — | — |
| Henson Plumbing INC | Miguel Angel Lopez | — | (925) 634 0272 | Other | Brentwood · Contra Costa County | — | — |
| Hercules Tree Service And Landscape Construction | Cabrera Richard | — | (510) 799 8733 | Windows, patio, painters | Hercules · Contra Costa County | — | — |
| Heritage Construction | Ralph Peter Palmeri | impallari@gmail.com | (925) 658 8060 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Heritage Custom Floors INC | Edwin Yair Velazquez Lopez | — | (925) 922 2619 | Other | Concord · Contra Costa County | — | — |
| Heritage Fire Protection | Kevin James Montana | — | (925) 963 9261 | Other | Discovery Bay · Contra Costa County | — | — |
| Heritage Flooring | Heritage Flooring | heritageflooring@comcast.net | (925) 642 8709 | Other | Discovery Bay · Contra Costa County | — | — |