| J P G Construction INC | John Patrick George | — | (805) 440 2230 | GC, remodel, ADU | Avila Beach · San Luis Obispo County | — | — |
| J P Newland Construction | John Peter Newland | — | (805) 765 7973 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| J P Walker Construction | Jason Paul Walker | — | (805) 704 4663 | GC, remodel, ADU | Los Osos · San Luis Obispo County | — | — |
| J P Woodworks | J P Woodworks | — | (805) 748 2976 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| J Patching Design - Build | J Patching Design - Build | — | (805) 710 9200 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| J R Backhoe | J R Backhoe | — | (805) 680 0395 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| J R D Framing LLC | Jesus Constantino Robles-diaz | — | (805) 296 4323 | Other | Templeton · San Luis Obispo County | — | — |
| J R Fencing | J R Fencing | john@jrfencing.com | (805) 400 5176 | Other | Paso Robles · San Luis Obispo County | — | — |
| J R Hurtado Construction | Jose Rafael Hurtado | — | (805) 234 0412 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| J R J Roofing Co | Jose Rafael Jaimes | — | (805) 610 6740 | Other roofers | Paso Robles · San Luis Obispo County | — | — |
| J R P Construction | James Robert Powell | — | (805) 434 8408 | GC, remodel, ADU | Creston · San Luis Obispo County | — | — |
| J R S Construction | James Robert Jr Stitt | — | (805) 550 6131 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| J Smith Painting | J Smith Painting | jsmithpainting@att.net | (805) 610 2675 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| J T Construction | Jeffrey Wayne Tietz | — | (805) 710 9173 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| J T L Construction | Jay Terence Levin | — | (805) 801 9162 | GC, remodel, ADU | Oceano · San Luis Obispo County | — | — |
| J T S INC | Justin David Watson | — | (805) 489 9191 | Tree | Arroyo Grande · San Luis Obispo County | — | — |
| J Terra Construction INC | James Randal Terra | — | (805) 423 5737 | Other | Templeton · San Luis Obispo County | — | — |
| J V Paving | J V Paving | — | (805) 238 3119 | Other | Paso Robles · San Luis Obispo County | — | — |
| J Vela Construction | Jose Manuel Jr Vela | — | (805) 235 2568 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| J W Design & Construction INC | Derek Allen Williams | — | (805) 544 3130 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| J W Electric | Jeffrey Stevens Wright | — | (805) 458 2208 | Electricians | Atascadero · San Luis Obispo County | — | — |
| J W Flooring | J W Flooring | — | (805) 264 2981 | Other | Templeton · San Luis Obispo County | — | — |
| J W Ornamental Steel | J W Ornamental Steel | — | (805) 440 9456 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| J Waddell Construction | Jason Lee Waddell | — | (805) 459 2170 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| J Walker Signs & Lighting INC | John Merle Walker | — | (805) 710 2299 | Electricians | Paso Robles · San Luis Obispo County | — | — |
| J Wilkins Artscape | J Wilkins Artscape | ageoldstone@jwilkinsartscape.com | (805) 237 1120 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| J&l Construction Company LLC | Jose Luis Calvario Hernandez | — | (805) 806 0684 | GC, remodel, ADU | Grover Beach · San Luis Obispo County | — | — |
| Jaax Concrete INC | Jesus Rafael Ruiz Contreras | — | (805) 286 5620 | Other | Paso Robles · San Luis Obispo County | — | — |
| Jack Bray Construction | Jack Brandon Bray | — | (805) 400 0855 | Other | Paso Robles · San Luis Obispo County | — | — |
| Jack Handley Construction Services | Jackson Fayette Handley | — | (805) 460 6527 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Jack Perry Construction | Jack Irvin Perry | — | (805) 835 5379 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Jack Russell Construction | Jack Robert Russell | — | (661) 619 4705 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Jackson & Co | John Lambert Wiest | — | (805) 591 9956 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Jackson Technology | Jack Willard Luepke | — | (909) 519 7247 | Electricians | Arroyo Grande · San Luis Obispo County | — | — |
| Jacob A Grossman Construction | Jacob Anders Grossman | — | (530) 448 1609 | GC, remodel, ADU | Oceano · San Luis Obispo County | — | — |
| Jacob Warren Sanders | Jacob Warren Sanders | — | (805) 709 7599 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Jacob's Roofing | David Jeremy Wilson | — | (805) 466 8607 | Other roofers | Atascadero · San Luis Obispo County | — | — |
| Jacobs Landscape | Jacobs Landscape | — | (805) 235 4007 | Windows, patio, painters | Atascadero · San Luis Obispo County | — | — |
| Jacqlyn Construction | Jacqlyn Marie Smith | — | (559) 816 2929 | GC, remodel, ADU | Pismo Beach · San Luis Obispo County | — | — |
| Jaguar Landscaping LLC | Tolentino Nava Claudio | — | (805) 627 2895 | Windows, patio, painters | Arroyo Grande · San Luis Obispo County | — | — |