| Guillermo Montoya | Guillermo Montoya | consultas@guillermomontoya.mx | (415) 927 4250 | GC, remodel, ADU | Corte Madera · Marin County | — | — |
| Guthrie Construction | Thomas Allan Guthrie | — | (415) 706 6178 | GC, remodel, ADU | Novato · Marin County | — | — |
| Gutierrez Roofing Company INC | Gutierrez Julio | — | (800) 450 6333 | Other roofers | San Rafael · Marin County | — | — |
| H C L Construction INC | Hans Christian Lind | — | (415) 816 1447 | GC, remodel, ADU | Ross · Marin County | — | — |
| H M Painting | H M Painting | — | (415) 596 2277 | Windows, patio, painters | Corte Madera · Marin County | — | — |
| H2operations INC | Ward Henness Hunt | info@h2operations.com | (415) 839 7503 | Pool | Novato · Marin County | — | — |
| Hachman Construction INC | Timothy Dervin Musto Hachman | admin@hachmanconstruction.com | (415) 256 9810 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Hadley General Contractors INC | Jeffery Laurence Hadley | — | (415) 383 0583 | GC, remodel, ADU | Belvedere · Marin County | — | — |
| Hakewill Construction Company INC | John William Hakewill | — | (415) 706 3873 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Hamill Painting INC | Andrew Martin Hamill | — | (415) 383 8311 | Windows, patio, painters | Mill Valley · Marin County | — | — |
| Hammer & Knife LLC | Joseph Stanford Roberts | — | (707) 845 8997 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Hammon Brothers Construction LLC | Morgan Key Hammon | — | (415) 760 3728 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Hands On Construction INC | Melsar Octavio De Leon Ochoa | — | (650) 290 4206 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Hanford Applied Restoration & Conservation | Douglas Raymond Hanford | — | (415) 258 6876 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Hanna Electrical | Robert Gary Hanna | — | (415) 686 3921 | Electricians | San Rafael · Marin County | — | — |
| Hans Zosseder | Hans Zosseder | — | (415) 269 4264 | Other | Novato · Marin County | — | — |
| Hansen Tree Artists | Hansen Tree Artists | — | (415) 613 8733 | Tree | Novato · Marin County | — | — |
| Haramis Bros INC | Anton Steve Haramis | — | (415) 517 5469 | GC, remodel, ADU | Larkspur · Marin County | — | — |
| Hardiman Construction INC DBA Trenchless Titan | Thomas Gerald Hardiman | — | (415) 924 2555 | Other | Larkspur · Marin County | — | — |
| Hardiman Construction/trenchless Titan | Thomas Gerald Hardiman | — | (415) 924 2555 | Other | Larkspur · Marin County | — | — |
| Hargrove Construction | Alexander Wolf Whit Hargrove | — | (415) 827 0192 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Harkin Services INC | Nicholas Patrick Harkin | — | (415) 806 4586 | GC, remodel, ADU | Novato · Marin County | — | — |
| Harley R Savate | Harley R Savate | — | (415) 720 6680 | Pool | San Rafael · Marin County | — | — |
| Harms & Hammer Construction | William Richard Harms | — | (415) 990 8628 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Harris Construction Co | Mark Harris Rutherford | — | (415) 368 7818 | GC, remodel, ADU | Sausalito · Marin County | — | — |
| Harrison & Whytt Cabinet Millwork & Fine Finish Carpentry | James Robert Harrison | — | (415) 342 0564 | Other | San Rafael · Marin County | — | — |
| Harte Building And Design INC | Joseph John Harte | hbd@sonic.net | (415) 290 3278 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Hasz Construction INC | Karl Earnest Hasz | — | (415) 531 2770 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Haute Textile Flooring | Sean Paul Hannigan | — | (415) 388 8312 | Other | Mill Valley · Marin County | — | — |
| Hawken Construction | Hilary Sullivan Hawken | — | (415) 302 1637 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Hawkins Development Corporation | Herb John Hawkins | — | (415) 877 1512 | GC, remodel, ADU | Tiburon · Marin County | — | — |
| Hawks Building INC | Eric Alexander Hawks | — | (415) 517 3041 | GC, remodel, ADU | Novato · Marin County | — | — |
| Hawley Building INC | Ian James Hawley | — | (415) 902 9039 | GC, remodel, ADU | Point Reyes Station · Marin County | — | — |
| Hayes And Associates Construction INC | Michael Keith Franz | — | (415) 271 2576 | GC, remodel, ADU | Novato · Marin County | — | — |
| Hb Landscaping | Hb Landscaping | carlen@hughblacklandscaping.ca | (519) 731-7281 | Windows, patio, painters | Novato · Marin County | — | — |
| Headforhomes | Russell Frank | — | (575) 914 0523 | Electricians | Fairfax · Marin County | — | — |
| Headlands Construction Co | Ryan Arti Miller | info@headlandsconstruction.com | (415) 250 8628 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Headlands Hardscaping & Design | Bruce Anthony Mccurdy | — | (415) 418 4792 | GC, remodel, ADU | Woodacre · Marin County | — | — |
| Healthy Building Science INC | Alexander Nachum Stadtner | — | (415) 785 7986 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Hearth & Home Of Marin | Steve Cary Cuvin | — | (415) 479 2876 | GC, remodel, ADU | San Rafael · Marin County | — | — |