| John T Bodine | John T Bodine | — | (805) 459 7204 | Electricians | Los Osos · San Luis Obispo County | — | — |
| John Thomas Maurer DBA Maurer Building And Design | Maurer Building And Design | — | (805) 975 2323 | GC, remodel, ADU | Templeton · San Luis Obispo County | — | — |
| John Whitford Communications | John Whitford Communications | — | (805) 461 3030 | Other | Atascadero · San Luis Obispo County | — | — |
| John-connor Ruggiero | John-connor Ruggiero | — | (805) 610 4595 | Windows, patio, painters | Creston · San Luis Obispo County | — | — |
| Johnny E Apodaca | Johnny E Apodaca | — | (805) 489 8002 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Johnny Matt Flooring LLC | John Matthew Thatcher | — | (805) 406 6090 | Other | Grover Beach · San Luis Obispo County | — | — |
| Johnson Construction | Michael Wayne Johnson | — | (805) 801 9521 | Other | Santa Margarita · San Luis Obispo County | — | — |
| Johnson Electric & Controls | Joshua Michael Johnson | — | (805) 903 3081 | Electricians | Los Osos · San Luis Obispo County | — | — |
| Johnson's Electric And Controls | Benjamin Roger Johnson | — | (805) 503 8463 | Electricians | San Luis Obispo · San Luis Obispo County | — | — |
| Johnston Clean-up Maintenance Service | Kelly Christine Jensen | — | (805) 801 3545 | Other | Nipomo · San Luis Obispo County | — | — |
| Johnston Construction | Richard Collins Johnston | — | (805) 235 6415 | GC, remodel, ADU | Los Osos · San Luis Obispo County | — | — |
| Johnston Pefab Fireplaces | Logan Andrew Johnston | — | (805) 538 9991 | Other | Santa Margarita · San Luis Obispo County | — | — |
| Jon Blackford | Jon Blackford | — | (805) 801 7182 | Other | Paso Robles · San Luis Obispo County | — | — |
| Jon Velasco Infinite Construction | Jonathan Edward Velasco | — | (805) 610 9129 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Jonathan Blake Construction | Jonathan Richard Blake | — | (805) 441 6971 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Jonathan Greig Construction | Jonathan David Greig | — | (805) 801 0047 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Jonathan Newell Design | Jonathan Newell Design | — | (805) 550 7105 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Jones Painting | Jones Painting | interested@domainmarket.com | (805) 801 6879 | Windows, patio, painters | Pismo Beach · San Luis Obispo County | — | — |
| Jones Tile Works | Jones Tile Works | — | (805) 610 2441 | Other | Atascadero · San Luis Obispo County | — | — |
| Jose's Plastering | Jose's Plastering | — | (805) 674 5793 | Other | Paso Robles · San Luis Obispo County | — | — |
| Joseph Allen Young | Joseph Allen Young | — | (530) 409 8892 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| Joseph Construction And Consulting INC DBA Joseph Engineering | Brian Allen Joseph | — | (805) 928 3703 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Joseph Engineering | Joseph Engineering | info@joseph-engineering.com | (805) 928 3703 | Other | Nipomo · San Luis Obispo County | — | — |
| Joseph O Clark | Joseph O Clark | — | (805) 235 1569 | HVAC | Cayucos · San Luis Obispo County | — | — |
| Joseph Santiago Construction | Joseph Carlos Santiago | — | (805) 801 0194 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Josh D Thus Construction INC DBA Catalyst Construction | Joshua David Thus | — | (805) 440 4773 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Josh Jensen Painting | Josh Jensen Painting | — | (805) 286 8023 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Joshua Hatter | Joshua Hatter | — | (805) 952 3133 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Joy Construction | Terence Patrick Joy | — | (805) 471 3880 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Jp Coastal Plumbing | Jp Coastal Plumbing | — | (805) 458 6293 | Other | Nipomo · San Luis Obispo County | — | — |
| Jps Contractors | Jeff P Symonds | — | (310) 877 7886 | GC, remodel, ADU | Los Osos · San Luis Obispo County | — | — |
| Jrf Construction | John Reily Ferguson | — | (805) 459 3984 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Jrs Construction INC | Joseph Robert Snow | — | (805) 868 9014 | Electricians | Nipomo · San Luis Obispo County | — | — |
| Js Electric | Jeffrey Lee Smith | jeffsmith0610@gmail.com | (805) 863 5921 | Electricians | Nipomo · San Luis Obispo County | — | — |
| Jsb General Engineering INC | Jason Sterling Bates | — | (805) 458 4433 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Jt Mulvey Construction LLC | Justin Trevor Mulvey | — | (805) 588 6759 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Jubilee Construction INC | Jonathan Luke Kessler | — | (805) 709 2792 | GC, remodel, ADU | Oceano · San Luis Obispo County | — | — |
| Judd's Construction & Repair Co | Swade Joseph Judd | — | (805) 904 3954 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Julian Construction | Cesar Garcia Ramos | — | (805) 698 6072 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Just Looking Gallery | Just Looking Gallery | info@justlookinggallery.com | (805) 541-6663 | Windows, patio, painters | San Luis Obispo · San Luis Obispo County | — | — |