| Lopes Farms & Grading INC | Heather Ann Lopes | — | (805) 896 8652 | Other | Santa Ynez · Santa Barbara County | — | — |
| Lopez Plumbing Systems INC | Cortes Dionel Lopez | — | (805) 708 0027 | Other | Santa Barbara · Santa Barbara County | — | — |
| Lopez Reyes Anthony | Lopez Reyes Anthony | — | (805) 697 2337 | Windows, patio, painters | Carpinteria · Santa Barbara County | — | — |
| Lopez Window Coverings Installations | Lopez Window Coverings Installations | — | (805) 863 4867 | Other | Santa Maria · Santa Barbara County | — | — |
| Lorenzo's Plumbing | Lorenzo's Plumbing | — | (805) 341 6198 | Other | Santa Maria · Santa Barbara County | — | — |
| Los Alamos Valley Construction | Peter Joseph Kopcrak | — | (435) 513 9339 | GC, remodel, ADU | Los Alamos · Santa Barbara County | — | — |
| Los Padres Fence | Los Padres Fence | — | (805) 682 1975 | Other | Santa Barbara · Santa Barbara County | — | — |
| Los Padres Fire Protection | Dominic Jay Dean | — | (805) 928 4628 | Other | Orcutt · Santa Barbara County | — | — |
| Los Padres Forest Association INC | Robert Alexander Gilcrest | — | (805) 405 8628 | GC, remodel, ADU | Goleta · Santa Barbara County | — | — |
| Lotus Cabinetry | Joseph Lee Franklin | — | (805) 354 0804 | Other | Santa Maria · Santa Barbara County | — | — |
| Lou's Plumbing | Lou's Plumbing | — | (805) 315 8121 | Other | Lompoc · Santa Barbara County | — | — |
| Louis S Duff Construction & Design | Louis Scott Duff | — | (805) 585 9490 | GC, remodel, ADU | Buellton · Santa Barbara County | — | — |
| Low Cost Plumbing INC | Sergio Mendoza Angeles | — | (805) 448 4469 | Other | Santa Barbara · Santa Barbara County | — | — |
| Low H20 Landscaping | Low H20 Landscaping | — | (805) 863 2525 | Windows, patio, painters | Santa Maria · Santa Barbara County | — | — |
| Lowell Lash | Lowell Lash | — | (805) 886 1849 | GC, remodel, ADU | Los Olivos · Santa Barbara County | — | — |
| Lozano Construction | Eduardo Alejandro Lozano | info@lozanoconstruction.com | (805) 722 9558 | GC, remodel, ADU | Carpinteria · Santa Barbara County | — | — |
| Lu's Drywall Repair & Painting Services | Lucio Antonio Uribe | — | (805) 478 3897 | Windows, patio, painters | Guadalupe · Santa Barbara County | — | — |
| Lua's Construction | Robert Javier Lua | info@luasconstruction.co | (805) 698 8520 | GC, remodel, ADU | Goleta · Santa Barbara County | — | — |
| Lucas Construction | Sanchez Ramirez Emmanuel | — | (805) 708 6959 | GC, remodel, ADU | Lompoc · Santa Barbara County | — | — |
| Luckley Construction | James David Luckley Sharkey | — | (619) 997 5001 | GC, remodel, ADU | Santa Ynez · Santa Barbara County | — | — |
| Luigi Crisa Plumbing | Luigi Crisa Plumbing | — | (805) 453 4722 | Other | Santa Barbara · Santa Barbara County | — | — |
| Luis Botello | Luis Botello | — | (805) 617 5547 | Other | Lompoc · Santa Barbara County | — | — |
| Luis Donato Solis | Luis Donato Solis | — | (805) 895 6932 | Windows, patio, painters | Santa Barbara · Santa Barbara County | — | — |
| Luis E Gil | Luis E Gil | — | (831) 207 7018 | Electricians | Santa Maria · Santa Barbara County | — | — |
| Luis Hernandez | Luis Hernandez | — | (805) 291 0250 | GC, remodel, ADU | Lompoc · Santa Barbara County | — | — |
| Luna And Sons Landscaping LLC | Jose Luis Luna Granados | — | (805) 720 3697 | Windows, patio, painters | Santa Maria · Santa Barbara County | — | — |
| Luxury Painting | Luxury Painting | interested@domainmarket.com | (805) 331 8414 | Windows, patio, painters | Santa Barbara · Santa Barbara County | — | — |
| Lynch Construction INC | Brian Kenneth Lynch | — | (805) 451 3459 | GC, remodel, ADU | Santa Barbara · Santa Barbara County | — | — |
| Lynn Morris Contracting INC | Lynn Pete Morris | lmorrisinc@yahoo.com | (805) 560 9000 | GC, remodel, ADU | Santa Barbara · Santa Barbara County | — | — |
| M & M Concrete Contractor | M & M Concrete Contractor | — | (805) 699 8874 | Other | Santa Barbara · Santa Barbara County | — | — |
| M & M Fire Protection | M & M Fire Protection | — | (714) 879 3473 | Other | Lompoc · Santa Barbara County | — | — |
| M & W Pumps INC | Valen Chase Anaya | info@mwpumps.com | (805) 925 1147 | Other | Santa Maria · Santa Barbara County | — | — |
| M C Construction | Mario Alberto Castaneda | — | (805) 904 9649 | GC, remodel, ADU | Santa Barbara · Santa Barbara County | — | — |
| M C Electric | Michael Patrick Connolly | — | (805) 895 6455 | Electricians | Goleta · Santa Barbara County | — | — |
| M D Construction Co INC | Michael Thomas Donovan | — | (805) 938 0615 | Other | Santa Maria · Santa Barbara County | — | — |
| M D Narron Engineering General Contractor | Michael D Narron | — | (805) 448 6857 | Other | Santa Maria · Santa Barbara County | — | — |
| M D Trees Corporation | John Vincent Ortiz | — | (559) 679 2688 | Tree | Santa Maria · Santa Barbara County | — | — |
| M E Building & Management Services INC | Matthew Dewain Dickey | — | (805) 310 1263 | GC, remodel, ADU | Santa Maria · Santa Barbara County | — | — |
| M Fontes & Co | Marco Antonio Fontes | — | (805) 770 8770 | Windows, patio, painters | Santa Barbara · Santa Barbara County | — | — |
| M G Andaluz Construction INC | Miguel Angel Barbosa Garcia | — | (805) 294 5280 | GC, remodel, ADU | Santa Maria · Santa Barbara County | — | — |