| Grizzle Construction | Roger Steven Grizzle | — | (805) 471 2374 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| Gtz Electric LLC | Oziel Oswaldo Gutierrez Martinez | — | (805) 470 0026 | Electricians | Los Osos · San Luis Obispo County | — | — |
| Gustav Keoni DBA Precision Construction Services | Jared Keoni Malapit | careers@precision.services | (805) 995 4195 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Guy Construction Company | Gyula Sylvester Fuleki | — | (805) 801 3061 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| Guy R Stadig General Contractor | Guy R Stadig General Contractor | — | (805) 795 6663 | GC, remodel, ADU | Avila Beach · San Luis Obispo County | — | — |
| H & H Enterprises | Silvia Sara Herrera | — | (805) 680 4984 | Windows, patio, painters | Nipomo · San Luis Obispo County | — | — |
| H & H Plumbing | H & H Plumbing | — | (805) 239 0553 | Other | Paso Robles · San Luis Obispo County | — | — |
| H D H Construction | Donald Floyd Harley | coding-to-freedom@protonmail.com | (530) 308 2991 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| H Gale Kyle INC DBA Kyle Company Roofing | Kathleen Jo Roush | — | (805) 543 1998 | Other roofers | San Luis Obispo · San Luis Obispo County | — | — |
| H I S Construction | Jonathan Markley Hamman | — | (805) 471 2268 | GC, remodel, ADU | Templeton · San Luis Obispo County | — | — |
| H J Construction INC | Dominic Joseph Judge | — | (805) 748 3149 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| H M Hart Electric INC | Roman Frank Renteria | — | (805) 481 1491 | Electricians | Atascadero · San Luis Obispo County | — | — |
| H S Concrete | H S Concrete | — | (805) 610 5050 | Other | Paso Robles · San Luis Obispo County | — | — |
| Hacienda Construction | Daniel Eliseo Romero | — | (805) 458 0332 | GC, remodel, ADU | Grover Beach · San Luis Obispo County | — | — |
| Hacienda Landscape & Maintenance | Hacienda Landscape & Maintenance | info@haciendalandscapes.com | (805) 481 8607 | Windows, patio, painters | Grover Beach · San Luis Obispo County | — | — |
| Hacienda Roofing | Hector Ruiz Perez | — | (805) 704 2854 | Other roofers | Nipomo · San Luis Obispo County | — | — |
| Haga Refrigeration | Haga Refrigeration | — | (805) 441 9737 | HVAC | San Luis Obispo · San Luis Obispo County | — | — |
| Hague Quality Water The Water Improvement Group | Eric Ryan Foronjy | — | (805) 528 8990 | Other | Los Osos · San Luis Obispo County | — | — |
| Halcyon Landscapers INC | Jacob Scott Taylor | info@halcyonlandscapers.com | (805) 709 7960 | Windows, patio, painters | Grover Beach · San Luis Obispo County | — | — |
| Hall Builders INC | Erica Leanne Hall | — | (805) 423 4731 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Hall Custom Remodeling | Hall Custom Remodeling | — | (805) 478 3948 | GC, remodel, ADU | Grover Beach · San Luis Obispo County | — | — |
| Hallstyle Construction | Nicholas Anthony Hall | — | (805) 748 7301 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Hamers Construction | Kevin Joshua Hamers | kevin@hamersconstruction.com | (805) 704 9227 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Hamm's Flooring | Hamm's Flooring | — | (805) 835 3847 | Other | Atascadero · San Luis Obispo County | — | — |
| Hamon Overhead Door Company INC | John Reuben Jr Hamon | — | (805) 391 3264 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Hanauer Jake Rickard Construction | Jake Richard Hanauer | — | (805) 610 9897 | GC, remodel, ADU | San Miguel · San Luis Obispo County | — | — |
| Hank's Welding Service | Henry Alan Heer | — | (805) 238 2404 | Other | Paso Robles · San Luis Obispo County | — | — |
| Hank's Welding Service | Tyson Alan Heer | — | (805) 238 2404 | HVAC | Paso Robles · San Luis Obispo County | — | — |
| Hanna Construction Engineering INC | Max| Sadeghian Mohammad Reza Sadeghian | — | (818) 331 8678 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Hansen Construction | Dawson Josiah Hansen | — | (916) 996 7746 | GC, remodel, ADU | Grover Beach · San Luis Obispo County | — | — |
| Hansen Electric | Hans Christian Hansen | — | (805) 801 4356 | Electricians | Arroyo Grande · San Luis Obispo County | — | — |
| Hansen Enterprises | Justin Donovan Hansen | — | (805) 674 3408 | Electricians | Paso Robles · San Luis Obispo County | — | — |
| Happy Water Heaters | Travis Robert Brown | — | (805) 427-8444 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Hardcastle Masonry | Hardcastle Masonry | — | (805) 431 0165 | Other | Paso Robles · San Luis Obispo County | — | — |
| Harper Commercial LLC | James Vincent Gutierrez | — | (415) 745 5072 | GC, remodel, ADU | Grover Beach · San Luis Obispo County | — | — |
| Harrell Construction | Matthew Lee Harrell | — | (559) 760 7832 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Harrison Electric | Richard Stewart Ii Harrison | — | (805) 995 1906 | Electricians | Cayucos · San Luis Obispo County | — | — |
| Harrod Home Construction INC | Michael James Harrod | — | (805) 712 8993 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Harrod Homes INC | Michael Ray Harrod | — | (805) 238 9468 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Hart To Heart Landscaping | Hart To Heart Landscaping | — | (805) 361 3801 | Windows, patio, painters | Pismo Beach · San Luis Obispo County | — | — |