| Good Neighbors Electric LLC | Anthony Phillip Orozco | — | (805) 610 5530 | Electricians | Atascadero · San Luis Obispo County | — | — |
| Good News Builders LLC | Kenneth Tony Oesterreich | — | (530) 448 6773 | GC, remodel, ADU | Grover Beach · San Luis Obispo County | — | — |
| Goodwin Construction Group INC | Mary Louise Goodwin | mark@goodwincgi.com | (805) 459 0132 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Goose Family Heating & Air | Kevin James Smith | goose@goosefamilyhvac.com | (805) 635 5488 | HVAC | Paso Robles · San Luis Obispo County | — | — |
| Gordon Construction | Chad Jacob Gordon | — | (805) 931 4013 | GC, remodel, ADU | Pismo Beach · San Luis Obispo County | — | — |
| Gordon W Anderson | Gordon W Anderson | — | (805) 547 9844 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Gouin Construction & Development INC | Joseph Scott Gouin | — | (805) 434 7906 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Gould Welding INC | Aaron Justin Gould | — | (805) 474 8403 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Gowdy Electric INC | Gary Lee Gowdy | — | (805) 909 0399 | Electricians | San Simeon · San Luis Obispo County | — | — |
| Gpl Construction & Renovations INC | Barajas Gabriel Lopez | — | (805) 674 3692 | GC, remodel, ADU | San Miguel · San Luis Obispo County | — | — |
| Grace Landscapes | Grace Landscapes | — | (805) 235 8142 | Windows, patio, painters | San Luis Obispo · San Luis Obispo County | — | — |
| Gradys Pools | Gradys Pools | — | (805) 858 8686 | Pool | Cayucos · San Luis Obispo County | — | — |
| Graham Miguel Construction | Graham Richard Miguel | — | (805) 235 9497 | GC, remodel, ADU | Santa Margarita · San Luis Obispo County | — | — |
| Graham Ranch Fencing | Graham Ranch Fencing | — | (405) 882 7640 | Other | Creston · San Luis Obispo County | — | — |
| Grandstaff Paint & Pressure Wash | Grandstaff Paint & Pressure Wash | — | (805) 235 0737 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Grant Gridiron Const | Grant Gridiron Const | — | (805) 489 5897 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Grateful Gardens | Grateful Gardens | — | (805) 440 1514 | Windows, patio, painters | Atascadero · San Luis Obispo County | — | — |
| Great Western Alarm And Communications INC | Marion Eugene Todd | — | (805) 238 9018 | Electricians | Paso Robles · San Luis Obispo County | — | — |
| Green - Smart Construction | Jeffrey Daniel Smart | — | (805) 215 8909 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| Green Collar Electric | Brian Scott Luikens | — | (916) 398 0092 | Electricians | Morro Bay · San Luis Obispo County | — | — |
| Green Goods | Michael James Robertson | — | (805) 543 9900 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Green Wave Electric | James Timothy De Vor | — | (805) 234 2136 | Electricians | Atascadero · San Luis Obispo County | — | — |
| Green With Envy Landscaping | Robi Al Nogo | — | (805) 237 2876 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Greenco | Josiah Eduard Mensing | info@greenco.com | (805) 423 7198 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Greene Electric INC | Wesley Allen Greene | — | (805) 459 0203 | Electricians | Atascadero · San Luis Obispo County | — | — |
| Greenline Lighting & Electric INC | Martin James Scheid | — | (805) 835 3045 | Electricians | Arroyo Grande · San Luis Obispo County | — | — |
| Greenovation | Stanley Scott Simons | — | (805) 464 2031 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Greenvale Tree Company | Steven Robert Franzmann | — | (805) 544 1124 | Tree | San Luis Obispo · San Luis Obispo County | — | — |
| Greenwave Building | Greenwave Building | — | (805) 550 2913 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| Greg Hauser Construction | Greg Steven Hauser | — | (661) 201 6242 | GC, remodel, ADU | Grover Beach · San Luis Obispo County | — | — |
| Greg Moore Construction INC | Gregory Dean Moore | — | (805) 541 2828 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Greg Nester Construction & Development | Gregory James Nester | — | (805) 481 5182 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Greg Peterson General Contractor | Greg Peterson General Contractor | — | (805) 801 6959 | HVAC | Atascadero · San Luis Obispo County | — | — |
| Greg Quirk Electric | Gregory Vance Quirk | — | (805) 471 0740 | Electricians | Los Osos · San Luis Obispo County | — | — |
| Gregg Schallen Construction | Gregg D Schallen | — | (805) 310 9140 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Gregory Avrum Cohen | Gregory Avrum Cohen | — | (818) 761 6867 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Gregory Dean Cockerill DBA All Systems Heating And Air Conditioni | Gregory Dean Cockerill | — | (805) 703 3464 | HVAC | Atascadero · San Luis Obispo County | — | — |
| Gregory Electric | Justin Anderson Gregory | — | (805) 431 2997 | Electricians | Pismo Beach · San Luis Obispo County | — | — |
| Gregory L Harkness | Gregory L Harkness | — | (805) 235 5654 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Grinnell Grading | Grinnell Grading | — | (805) 801 4908 | Other | Creston · San Luis Obispo County | — | — |