| Home Integration LLC DBA Audio Video Integration | Anthony Christopher Probst | — | (415) 526 0070 | Other | San Rafael · Marin County | — | — |
| Home Pro Electric Services | Mario Ivan Panduro | — | (415) 375 1488 | Electricians | Novato · Marin County | — | — |
| Home Team Services Remodeling Corp | John Patrick Creighton | — | (415) 713 8061 | HVAC | Tiburon · Marin County | — | — |
| Homecastle Property Care | Homecastle Property Care | — | (415) 450 7506 | GC, remodel, ADU | Nicasio · Marin County | — | — |
| Homestory Doors Of Marin | Mark Honore' Labourdette | — | (415) 883 7220 | GC, remodel, ADU | Novato · Marin County | — | — |
| Honeydew Co | John David Rushton | — | (415) 497 4671 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| Hope Construction LLC | John Tobias Hope | — | (415) 606 4673 | GC, remodel, ADU | Inverness · Marin County | — | — |
| Horizon Construction Services | Thomas Joseph Moreno | — | (415) 300 0144 | GC, remodel, ADU | Greenbrae · Marin County | — | — |
| Horizon Plumbing Heating & Air | Horizon Plumbing Heating & Air | — | (415) 897 4015 | HVAC | Novato · Marin County | — | — |
| Hornstein Claddings | Hornstein Claddings | — | (415) 261 4151 | Electricians | San Rafael · Marin County | — | — |
| Horticare | Winkelhake Helmut | — | (415) 491 1882 | Windows, patio, painters | Ross · Marin County | — | — |
| Hot Foot International Of America INC | Roger Snow | — | (415) 789 5135 | Other | Sausalito · Marin County | — | — |
| Hoyt's Carpet Service | Kristian Fletcher Hoyt | — | (415) 250 6712 | Other | Mill Valley · Marin County | — | — |
| Hozapps Electric LLC | Justin David Hovsepian | — | (707) 623 4872 | Electricians | Novato · Marin County | — | — |
| Hsc Services INC | Michael Anthony Hallroan | — | (415) 612 4250 | GC, remodel, ADU | Novato · Marin County | — | — |
| Hughes Builders INC | Paul Gabriel Hughes | — | (415) 726 3580 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Humanature Landscape Design INC | Emily Sybil Hatfield | — | (415) 717 6916 | Windows, patio, painters | San Anselmo · Marin County | — | — |
| Humbercor Construction | Cortes Navarro Humberto | — | (415) 518 4227 | GC, remodel, ADU | Novato · Marin County | — | — |
| Hummingbird Landscape Management | Hummingbird Landscape Management | — | (415) 407 2896 | Windows, patio, painters | Woodacre · Marin County | — | — |
| Huntingdon Construction | Richard Brian Huntingdon | — | (415) 606 2776 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Hurricane Hauling & Demolition INC | Paul Yuketeswar Sonnabend | — | (415) 456 3407 | Windows, patio, painters | Novato · Marin County | — | — |
| Hydronics INC | Derek Edward Rodd | — | (415) 601 3144 | HVAC | San Anselmo · Marin County | — | — |
| Hydrotech Mechanical INC | Christian Grant Wheeler | info@hydrotechmechanical.ca | (415) 465 4911 | HVAC | Larkspur · Marin County | — | — |
| Hyland Tile & Marble INC | Patrick Sean Hyland | — | (707) 580 6424 | Other | San Rafael · Marin County | — | — |
| I Cannan Electric | Ireland Laurel Cannan | eben@eyebytes.com | (415) 596 3676 | Electricians | Novato · Marin County | — | — |
| I Construction | Danipal Betyordekom | — | (415) 424 5969 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| I D Painting Company | Irving Eduardo Dzul Diaz | — | (415) 637 1083 | Windows, patio, painters | San Rafael · Marin County | — | — |
| I K Design INC | Khelif Isaac | — | (415) 458 8011 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| I-beam Reconstruction Management INC | Anna Allison Cease | — | (415) 887 7687 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| Ian Dunne Plumbing | Ian Dunne Plumbing | — | (415) 483 6801 | Other | San Anselmo · Marin County | — | — |
| Ian Edward Fitzpatrick | Ian Edward Fitzpatrick | — | (415) 317 5700 | GC, remodel, ADU | Greenbrae · Marin County | — | — |
| Ian Pardoe Builder | Ian Pardoe Builder | — | (415) 847 6054 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Ian Thompson Construction | Thompson Ian | — | (415) 279 3932 | GC, remodel, ADU | Larkspur · Marin County | — | — |
| Ibarra Construction | Ibarra Carrillo Jose De Jesus | — | (415) 595 4537 | GC, remodel, ADU | Novato · Marin County | — | — |
| Icd Innovative Construction & Design INC | Dan V Ho | — | (415) 531 4546 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Ignacio Camarillo Reyes | Ignacio Camarillo Reyes | — | (415) 845 3431 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Ignacio's Construction | Perez Lopez Ignacio | — | (415) 419 1013 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Imran Ay Construction INC | Ali Neesaneh | — | (415) 250 2320 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| In - Faux | In - Faux | — | (707) 331 3840 | Windows, patio, painters | Woodacre · Marin County | — | — |
| In Home Independence | In Home Independence | — | (415) 897 3867 | GC, remodel, ADU | Novato · Marin County | — | — |