| Heisserer Construction | Brenton Werner Heisserer | — | (228) 364 3331 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Helios Building Group INC | Reginald Martinez Jr Turner | — | (805) 342 5024 | Electricians | Oxnard · Ventura County | — | — |
| Helix Landscape Construction | John Randolph Iii Arney | — | (805) 396 6624 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Helland & Acton INC | Gregory Peter Acton | — | (805) 415 6637 | Other | Moorpark · Ventura County | — | — |
| Henderson Constructors / Builders | Henderson Constructors / Builders | — | (805) 493 5298 | Electricians | Thousand Oaks · Ventura County | — | — |
| Henderson Homes | Henderson Homes | — | (805) 535 9320 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Henderson Wood Floors INC | James Dewitt Henderson | — | (805) 648 7311 | Other | Ventura · Ventura County | — | — |
| Henry Mauricio Bautista | Henry Mauricio Bautista | — | (818) 998 9029 | Other | Simi Valley · Ventura County | — | — |
| Henry's Welding | Enrique Sierra Figueroa | — | (805) 388 3301 | Other | Camarillo · Ventura County | — | — |
| Herbert And Sons Electric | Rodric Holt Herbert | — | (805) 522 1500 | Electricians | Simi Valley · Ventura County | — | — |
| Herbert Torres Construction | Torres Herbert | — | (805) 689 2282 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Herdez Acoustics | Herdez Acoustics | — | (805) 758 3286 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Heredia's Custom Cabinets | Jose Antonio Heredia | info@herediascustomcabinets.com | (805) 524 7727 | Other | Fillmore · Ventura County | — | — |
| Heritage Construction | Paul Eric Nicholls | impallari@gmail.com | (805) 390 2474 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Heritage Electric INC | Stephen Richard Campos | ynishida@heritageelectric.com | (408) 253-8946 | Electricians | Santa Paula · Ventura County | — | — |
| Herman Electric | Steven Erich Herman | — | (805) 358 1605 | Electricians | Camarillo · Ventura County | — | — |
| Herman Home Works | Herman Home Works | — | (805) 232 4907 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Hernado INC | Alan Roelle Peinado | — | (805) 850 9793 | Electricians | Thousand Oaks · Ventura County | — | — |
| Hernandez Built Construction INC | Roberto Barboza Hernandez | — | (805) 218 3793 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Hernandez Painting | Hernandez Painting | — | (805) 988 3248 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Hernandez Tile Company | Hernandez Crystal Cisneros | — | (805) 331 2906 | Other | Santa Paula · Ventura County | — | — |
| Herrera Sheet Metal And Air Conditioning INC | Michael Huerta Herrera | — | (805) 483 3390 | HVAC | Oxnard · Ventura County | — | — |
| Herron Carpentry | Herron Carpentry | — | (805) 404 6806 | Other | Simi Valley · Ventura County | — | — |
| Herron Construction Company | Paul Kenneth Herron | — | (805) 558 6905 | GC, remodel, ADU | Somis · Ventura County | — | — |
| Heshco Industries | Heshco Industries | — | (805) 340 4389 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Hester - Sorensen INC DBA Dreamscape | Joseph Brian Sorensen | — | (805) 432 7616 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| Hhh Improvement | Hhh Improvement | — | (510) 340 0050 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Hi Voltage Electric INC | Mascorro Cintia Gaytan | — | (818) 205 8018 | Electricians | Simi Valley · Ventura County | — | — |
| Hic Quality Painting | Hic Quality Painting | — | (805) 366 1455 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Hico Construction | Ataei Ron | — | (818) 836 4899 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Hidden Hills Roofing | Juan Manuel Patino-Cuevas | — | (213) 880 9010 | Other roofers | Thousand Oaks · Ventura County | — | — |
| Higg's Construction Company | Gregory Wayne Higgs | — | (805) 844 2699 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| High Class Glass INC | Emmett Gadi Thomas | — | (805) 856 8751 | Windows, patio, painters | Newbury Park · Ventura County | — | — |
| High Definition T Bar | High Definition T Bar | — | (213) 923 4292 | Other | Simi Valley · Ventura County | — | — |
| High Limit Heating & Cooling INC | Perez Guillermo Rosales | — | (805) 673 9780 | HVAC | Oxnard · Ventura County | — | — |
| High Performance Heating & Air Conditioning INC | Domingo Jr Chavez | — | (805) 248 4302 | HVAC | Oxnard · Ventura County | — | — |
| High Point Construction | Logan Paul Funk | — | (805) 794 7125 | GC, remodel, ADU | Oak View · Ventura County | — | — |
| Highland Works Landscaping INC | Saul Eduardo Ramirez Cobian | — | (805) 670 9977 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| Highsmith & Daughters Plumbing INC DBA Simi Sewer Services | Matthew Scott Highsmith | — | (818) 602 8113 | Other | Simi Valley · Ventura County | — | — |
| Hilgers Earth Movers | Hilgers Earth Movers | — | (805) 312 1537 | Other | Ojai · Ventura County | — | — |