| Heritage Structures INC | Joseph John Rezek | heritageofficesteph@gmail.com | (925) 708 6309 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Hermosillo Builder | Hermosillo Builder | — | (925) 300 8507 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Hermsmeyer Painting Company Incorporated | David Espinoza Minjarez | — | (925) 813 1978 | Windows, patio, painters | Antioch · Contra Costa County | — | — |
| Hernandez And Associates | Hernandez Julio | administracion@hernandezassociates.com | (925) 849 6033 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Hernandez Construction Services LLC | Hernandez Manuel | — | (510) 499 7283 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Hernandez Contractors LLC | Oscar Antonio Hernandez | — | (925) 597 1013 | GC, remodel, ADU | Alamo · Contra Costa County | — | — |
| Hernandez Floor Covering | Hernandez Floor Covering | — | (925) 250 9782 | Other | Concord · Contra Costa County | — | — |
| Hernandez Landscape | Hernandez Landscape | — | (510) 334 0412 | Windows, patio, painters | Richmond · Contra Costa County | — | — |
| Hernandez Landscaping & Sons INC | Eduardo Hernandez | — | (925) 634 8511 | Windows, patio, painters | Brentwood · Contra Costa County | — | — |
| Hernandez Plumbing | Hernandez Plumbing | — | (415) 336 4061 | Other | El Sobrante · Contra Costa County | — | — |
| Herrera General Construction INC | Edgar Eleazar Herrera Funes | — | (510) 715 2111 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Herreria Santa Maria | Herreria Santa Maria | — | (510) 232 9792 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Herroc Stone Countertops | Eduardo Javier Hernandez Gutierrez | — | (831) 713 9525 | Other | Concord · Contra Costa County | — | — |
| Hess Elevators | Hess Elevators | — | (925) 301 6943 | GC, remodel, ADU | Antioch · Contra Costa County | — | — |
| Hesselberg Concrete | Hesselberg Concrete | — | (925) 998 8574 | Other | Concord · Contra Costa County | — | — |
| Hetnet Construction | Stephen David Butler | — | (925) 583 8200 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Heuer INC | Jeffrey Robert Heuer | — | (415) 377 2446 | GC, remodel, ADU | Alamo · Contra Costa County | — | — |
| Hexagon Construction LLC | Smith Jorge Perez | admin@hexagon.associates | (925) 322 3765 | GC, remodel, ADU | Pleasant Hill · Contra Costa County | — | — |
| Hexlin Construction INC | Zhongru He | — | (510) 427 0808 | Electricians | Richmond · Contra Costa County | — | — |
| Hfa/howard Frakes & Associates | Howard Jr Frakes | — | (925) 383 8049 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Hgd Construction INC | Diaz Isarraraz Roberto | — | (925) 243 5947 | GC, remodel, ADU | Antioch · Contra Costa County | — | — |
| Hi - Lite Enterprises INC | Mitchell Jr Hardin | — | (877) 556 4016 | Other | Antioch · Contra Costa County | — | — |
| Hi Tech Environmental Heating & Air | Manuel Bustos Buendia | — | (925) 727 6003 | HVAC | Discovery Bay · Contra Costa County | — | — |
| Hi-hvac LLC | Aleksandr Shepel | info@hi-hvac.com | (925) 302 2429 | HVAC | Richmond · Contra Costa County | — | — |
| Hi-tech Heating And Cooling | Hi-tech Heating And Cooling | — | (888) 822 8845 | HVAC | Antioch · Contra Costa County | — | — |
| Hi-top Roofing | Miguel Angel Reyes | — | (925) 848 8905 | Other roofers | Point Richmond · Contra Costa County | — | — |
| Hidalgo Construction INC | Hernandez Nicolas Perez | — | (510) 688 4385 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Hieu Nguyen Landscaping INC | Nguyen Hieu | — | (925) 813 2669 | Windows, patio, painters | Pittsburg · Contra Costa County | — | — |
| High Band Construction INC | Jefferson Scott Shewry | — | (925) 382 2309 | Electricians | Brentwood · Contra Costa County | — | — |
| High Definition Solar INC DBA High Definition Solar Construction | Timothy John Netherton | — | (925) 566 8282 | Other roofers | Concord · Contra Costa County | — | — |
| High Performance Heating & Air | High Performance Heating & Air | — | (925) 687 6887 | HVAC | Concord · Contra Costa County | — | — |
| High Performance Pipelines Hydrovac INC | Atam Julius Chofor | — | (510) 725 5871 | Other | Antioch · Contra Costa County | — | — |
| High Skill's Builder Corp | Paulo Sergio Le Ribeiro | — | (510) 932 1202 | GC, remodel, ADU | San Pablo · Contra Costa County | — | — |
| High Tech Plumbing | High Tech Plumbing | — | (925) 852 8552 | HVAC | Concord · Contra Costa County | — | — |
| High Voltage Electric And Lighting INC | Felix Alfonso Anaya | — | (619) 300 4563 | Electricians | San Pablo · Contra Costa County | — | — |
| Highview Construction INC | Ravinderpal Singh Hanspal | — | (925) 209 6747 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Hill's General Contractor | Aguilar Hildebrand Aguilar | hildebrandaguilar@gmail.com | (925) 354 5201 | GC, remodel, ADU | Bay Point · Contra Costa County | — | — |
| Hillo Construction INC | Danny | — | (925) 727 8422 | GC, remodel, ADU | Pleasant Hill · Contra Costa County | — | — |
| Hills General Builders INC | Matthew Miskie | — | (925) 628 4012 | GC, remodel, ADU | Antioch · Contra Costa County | — | — |
| Hillside Construction | Thomas Davin Lemire | — | (916) 207 7421 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |