| Jay's Decking Company | Jason Lee Faria | info@indiantypefoundry.com | (209) 855 6691 | Other | Tracy · San Joaquin County | — | — |
| Jayr Roofing & Removal | Jonathan Joe Rincon | — | (209) 229 0980 | Other roofers | Lodi · San Joaquin County | — | — |
| Jb Air | Jb Air | — | (209) 922 1520 | HVAC | Stockton · San Joaquin County | — | — |
| Jb Electric | Balderrama Jordan | — | (408) 835 2165 | Electricians | Lathrop · San Joaquin County | — | — |
| Jb Painting | Aaron Landa | — | (510) 314 4518 | Windows, patio, painters | Manteca · San Joaquin County | — | — |
| Jb Quality Plumbing INC | Jose Catarino Bravo Ramirez | — | (669) 225 4359 | Other | Stockton · San Joaquin County | — | — |
| Jb&sg Reglaze | Susett Anahi Garcia Robles | refinishing@jbsgreglaze.com | (209) 302 6649 | Other | Manteca · San Joaquin County | — | — |
| Jc Commercial Flooring INC | Juan Carlos Garcia Lopez | — | (209) 503 1609 | Other | Tracy · San Joaquin County | — | — |
| Jc Construction & Renovations INC | Trevon Malic Wilson | — | (209) 715 8481 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Jc Electric | Jc Electric | — | (760) 683-2090 | Electricians | Carlsbad · San Joaquin County | — | — |
| Jc Electrical INC | Jose Macedonio Castaneda Cardenas | — | (925) 968 5656 | Electricians | Stockton · San Joaquin County | — | — |
| Jc Sewer & Drain Plumbing | Yvonne Marie Casity | — | (209) 403 9023 | Other | Stockton · San Joaquin County | — | — |
| Jc's Plumbing | Jc's Plumbing | — | (209) 871 5044 | Other | Stockton · San Joaquin County | — | — |
| Jceee Signs | Jceee Signs | — | (209) 321 9580 | Other | Manteca · San Joaquin County | — | — |
| Jcr Construction INC | John Leonard Dos Reis | — | (209) 810 0105 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Jd & E Electric LLC | Jose David Subuyuj | — | (408) 752 6607 | Electricians | Tracy · San Joaquin County | — | — |
| Jd Plumbing | Jd Plumbing | — | (209) 346 6293 | Other | Lodi · San Joaquin County | — | — |
| Jd Specialties | Troy Anthony Schneider | — | (209) 467 0324 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Jdl Link INC | Albert Torres Sunglao | — | (209) 487 5102 | Other | Lathrop · San Joaquin County | — | — |
| Jdm Drywall | Jdm Drywall | — | (510) 999 2549 | Other | Acampo · San Joaquin County | — | — |
| Jdw Masonry INC | Nathan James Wait | — | (209) 601 3003 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Jeff Corallo General Contractor DBA J C Construction | Jeffery Michael Corallo | — | (209) 993 2825 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Jeggs Plumbing INC | Alvarado Joel Mendoza | — | (510) 365 9700 | Other | Manteca · San Joaquin County | — | — |
| Jenco Companies | Kathleen Tanya Jennison | brian@jencocompanies.com | (209) 931 8129 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Jensens Pool And Spa Service | Ian Douglas Jensen | — | (209) 477 1372 | Pool | Stockton · San Joaquin County | — | — |
| Jenson Mechanical INC | Gregory Alan Jenson | — | (510) 429 8078 | HVAC | Tracy · San Joaquin County | — | — |
| Jeremiah's Painting | Jeremiah's Painting | jeremiah@jeremiahspainting.com | (209) 662 5253 | Windows, patio, painters | Lodi · San Joaquin County | — | — |
| Jeremic Building Solutions | Jeremic Building Solutions | — | (209) 269 7012 | GC, remodel, ADU | Lockeford · San Joaquin County | — | — |
| Jeremy Nathan Marshall | Jeremy Nathan Marshall | — | (559) 769 8111 | Electricians | Manteca · San Joaquin County | — | — |
| Jeremy Skelton Construction | Jeremy Keith Skelton | — | (209) 401 4053 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Jergens INC | Richard Gert Sorensen | — | (209) 333 1485 | HVAC | Lodi · San Joaquin County | — | — |
| Jerry Walker Roofing & Construction | Jerry Walker | — | (209) 482 7663 | Other roofers | Tracy · San Joaquin County | — | — |
| Jesmar Mechanical INC | Carlos Magdaleno | — | (510) 429 4733 | Other | Stockton · San Joaquin County | — | — |
| Jesse Martinez | Jesse Martinez | — | (925) 321 2257 | Other | Tracy · San Joaquin County | — | — |
| Jesse The Tree Guy INC | Jesse Guadarrama | — | (209) 366 3819 | Tree | Lodi · San Joaquin County | — | — |
| Jesus Morfin - Marble Tile Master | Morfin Jesus | — | (209) 405 6745 | Other | Stockton · San Joaquin County | — | — |
| Jft Tile | Jft Tile | erickfranco@jfttile.com | (209) 762 0301 | Other | Stockton · San Joaquin County | — | — |
| Jg Construction | Jose Zacarias Iii Garcia | — | (408) 335 9690 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Jg Custom Painting INC | Jose Alberto Gonzalez Diaz | — | (925) 864 5965 | Windows, patio, painters | Tracy · San Joaquin County | — | — |
| Jg Flooring | Jg Flooring | jonathan@jgflooring.com | (209) 570 1885 | Other | Lodi · San Joaquin County | — | — |