| Holland & Knapp Construction INC | Zachary Forrest Knapp | — | (805) 544 7467 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Holland Painting Slo LLC | William Alexander Holland | hollandpaintingslo@gmail.com | (805) 316 5851 | Windows, patio, painters | San Luis Obispo · San Luis Obispo County | — | — |
| Hollister General Engineering INC | Jeffrey Wayne Hollister | — | (805) 391 0565 | Other | Paso Robles · San Luis Obispo County | — | — |
| Holloway Earthwork INC | Trevor Stanton Holloway | — | (805) 975 7542 | Other | Atascadero · San Luis Obispo County | — | — |
| Home Repair Etc | Home Repair Etc | — | (805) 924 1718 | GC, remodel, ADU | Cambria · San Luis Obispo County | — | — |
| Homegrown Havens Building Co | Adam James Dale | — | (805) 423 2996 | Windows, patio, painters | Atascadero · San Luis Obispo County | — | — |
| Honest Concrete Works | Honest Concrete Works | — | (805) 538 0392 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Hopson Construction | James Eugene Hopson | support@webador.com | (559) 479 0426 | GC, remodel, ADU | Oceano · San Luis Obispo County | — | — |
| Hornet Electric | Marvin Gene Ii Cheeks | — | (805) 460 3078 | Electricians | San Miguel · San Luis Obispo County | — | — |
| House-doc Construction | David Anthony Quintel | — | (805) 748 9499 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Howard Construction | Chim Berggren Howard | info@howardconstruction.com | (916) 444-6000 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| Howard D Mc Cain Electric | Howard D Mc Cain | — | (805) 927 2939 | Electricians | Cambria · San Luis Obispo County | — | — |
| Huff Communications | Huff Communications | — | (805) 476 7959 | Other | Atascadero · San Luis Obispo County | — | — |
| Hugh Cocke Construction | Hugh Joseph Cocke | — | (805) 423 1711 | GC, remodel, ADU | Avila Beach · San Luis Obispo County | — | — |
| Hulit Tile And Granite | Hulit Tile And Granite | — | (805) 748 2480 | Other | Santa Margarita · San Luis Obispo County | — | — |
| Hull Construction | Logan Nash Hull | — | (928) 607 1774 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Humble Construction | Eugene Joseph Humble | — | (805) 674 2242 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Hunstad Homes INC | Robert Jaime Melero | robbie@hunstadhomes.com | (805) 458 0627 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Hunt Construction | Kevin Howard Hunt | info@hunt-construction.com | (805) 286 6545 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Hunter Enterprises | Bruce Douglas Hunter | — | (805) 709 4549 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Hunter James INC | Ronald James Mc Kenna | — | (805) 544 2602 | GC, remodel, ADU | Grover Beach · San Luis Obispo County | — | — |
| Huntress Construction | John Gordon Hunt | — | (805) 441 0669 | GC, remodel, ADU | Templeton · San Luis Obispo County | — | — |
| Hurley Electric | Colin Craig Hurley | — | (805) 310 9755 | Electricians | Nipomo · San Luis Obispo County | — | — |
| Husky Builders INC | Silva Cain Barragan | — | (805) 868 5392 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Hutch Heating & Air INC | Jered Edward Wright | — | (805) 466 8199 | HVAC | Atascadero · San Luis Obispo County | — | — |
| Hutchinson Construction Company | Joseph Charles Hutchinson | — | (805) 434 8429 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Hutchinson Construction INC | Jerad Louis Brown Hutchinson | — | (805) 423 8715 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Ian Thomas Castro | Ian Thomas Castro | — | (541) 661 2997 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| Icon Builders | Icon Builders | — | (805) 748 9168 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Ideal City Construction INC | Akisha Ariel Rundquist | akisha@idealcityconstruction.com | (817) 734 7051 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Ideal Steel Fabrication | Ideal Steel Fabrication | — | (805) 315 2491 | Other | Nipomo · San Luis Obispo County | — | — |
| Idler's Home | James Andrew Sorenson | — | (805) 238 6020 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Iet Construction INC | Isaac Everett Thomas | — | (805) 819 1890 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Igl Pavers | Alexis Megan Gaffney | iglpavers@gmail.com | (805) 215 8776 | Windows, patio, painters | Morro Bay · San Luis Obispo County | — | — |
| Ike's Tree Service | Isaiah Cameron Anthony | — | (805) 975 2303 | Tree | San Miguel · San Luis Obispo County | — | — |
| Illumeffects | Scott Phillip Valentine | — | (805) 519 1716 | Electricians | Grover Beach · San Luis Obispo County | — | — |
| Imc Building INC | Isaac Anthony Montgomery | isaac@imcbuilding.com | (805) 431 3233 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Imi Design & Construction | Paul James Vuocolo | — | (805) 458 7815 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Impeccable Construction | Juan Pablo Martinez | — | (206) 380 2988 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Impeccable Construction Jm Group | Juan Pablo Martinez | — | (206) 380 2988 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |