| HVAC Panda Home Wizards Remodeling & Construction | Michael Wayne Kenney | — | (866) 967 2632 | HVAC | Oakland · Alameda County | — | — |
| HVAC Service Star INC | Henry Elia | — | (214) 949 9141 | HVAC | Livermore · Alameda County | — | — |
| HVAC Services: Heating & Air Conditioning | HVAC Services: Heating & Air Conditioning | — | (323) 325-4914 | HVAC | Huntington Park · Alameda County | — | — |
| Hx Construction INC | Xinjing Zhao | — | (510) 396 3737 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Hyberbuild Construction | Li Wenjie | — | (415) 857 1626 | GC, remodel, ADU | San Lorenzo · Alameda County | — | — |
| Hydabrek Construction INC | Richard Duane Heidebrecht | — | (925) 417 2286 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Hyders Construction INC | Mohammed Hyder Khan | hydersconstruction@gmail.com | (925) 699 6228 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Hydro Works Well & Pump INC | Joshua Charles Warren | — | (510) 363 5605 | Other | Castro Valley · Alameda County | — | — |
| Hydroworks Developers | Ashot Avagian | — | (929) 786 0842 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Hynamic HVAC | Hynamic HVAC | — | (510) 424 1679 | HVAC | San Leandro · Alameda County | — | — |
| Hyperion Design & Build | Charles Robert Sosa | — | (415) 265 3845 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| I & A Contractor INC | Irene Avila | — | (650) 218 7793 | Other roofers | Hayward · Alameda County | — | — |
| I - Build & Design | I - Build & Design | — | (415) 999 0831 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| I B Construction | Balasin Ionel | — | (510) 384 3350 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| I C D Construction | Gheorghita Catalin Ilie | — | (415) 513 5550 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| I G Build | I G Build | — | (323) 304 4973 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| I Know A Guy Contracting INC | Steven Michael Jr Sumner | duce@iknowaguycontracting.com | (615) 517 6879 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| I N M Drywall | I N M Drywall | — | (415) 816 9738 | Other | Hayward · Alameda County | — | — |
| I N T Design Construction INC | Peter Baruch Mueller | info@intdesignconstruction.com | (415) 940 4552 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| I R C Flooring INC | Ildefonso Rafael Casillas | — | (510) 772 6731 | Other | Fremont · Alameda County | — | — |
| Ib Marble And Solid Surfaces INC | Ignacio Barron | — | (415) 850 3481 | Other | Pleasanton · Alameda County | — | — |
| Ib Roofing INC | Bustamante Anguiano Israel | — | (510) 219 4792 | Other roofers | Oakland · Alameda County | — | — |
| Ibarra Floors | Ibarra Floors | — | (415) 930 5999 | Other | Newark · Alameda County | — | — |
| Ibarras Drywall INC | Diaz Emmanuel Ibarra | — | (510) 561 7107 | Other | Hayward · Alameda County | — | — |
| Iberia Construction | Magrakvelidze Vasil | — | (718) 207 7796 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Ice & Hot Bay H V A C Service | Jian Heng Huang | — | (415) 309 7392 | HVAC | San Leandro · Alameda County | — | — |
| Ida And Max Alvarado Construction LLC | Isagani Dionisio Almazan | — | (510) 717 1424 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Ideal Design And Construction | Richard Eric Schwarzmann | — | (510) 501 8667 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Ideal Electric | Okanovic Esed | — | (510) 757 4094 | Electricians | Berkeley · Alameda County | — | — |
| Ido Oppenheimer Tile | Ido Oppenheimer Tile | — | (510) 486 8387 | Other | Berkeley · Alameda County | — | — |
| Ife Leasing INC | Anil Kumar | — | (916) 422 2250 | Other | Dublin · Alameda County | — | — |
| Ig Landscapes INC | Isidoro Gonzalez | — | (650) 739 5197 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Ihor Malikov | Ihor Malikov | — | (415) 889 9418 | Electricians | Oakland · Alameda County | — | — |
| Illumination Management Services + Electric (ims) | Del Pinal Moran Erwin | — | (510) 717 9214 | Electricians | Berkeley · Alameda County | — | — |
| Ilova Tile And Stone Corporation | Ion Ilovan | — | (925) 339 9873 | Other | Livermore · Alameda County | — | — |
| Iluminar Electric | Velasco Alfonso | — | (559) 317 2294 | Electricians | Oakland · Alameda County | — | — |
| Imagine Interiors | Imagine Interiors | — | (650) 309 3314 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Imhof Tractor Service INC | Frank Joseph Imhof | — | (925) 600 0997 | Other | Sunol · Alameda County | — | — |
| Imj Plumbing INC | Ismael Rivera Orosco | — | (415) 637 4245 | Other | Oakland · Alameda County | — | — |
| Immensity Electric | Rafael Augusto Castaneda Villanueva | immensityelectric@gmail.com | (415) 632 2886 | Electricians | San Leandro · Alameda County | — | — |