| Lh Building Construction | Luis Enrique Hernandez | — | (510) 299 6061 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Li's Superior Renovations | Li's Superior Renovations | — | (209) 948 9888 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Liams Pools Plastering | Vargas Jose Ramos | — | (209) 566 3703 | Pool | Tracy · San Joaquin County | — | — |
| Liberty Construction | Edward Bettercourt Alves | — | (209) 996 7757 | GC, remodel, ADU | Escalon · San Joaquin County | — | — |
| Liberty Ornamental Iron Works | Lopez Alejandro | — | (209) 938 0572 | Other | Stockton · San Joaquin County | — | — |
| Life Line Electric | Marc Anthony White | — | (510) 967 9375 | Electricians | Stockton · San Joaquin County | — | — |
| Lifestyle Landscape Design & Construction INC | Juan Carlos Anguiano | — | (209) 276 4116 | Windows, patio, painters | Ripon · San Joaquin County | — | — |
| Lifestyle Painting | Lifestyle Painting | — | (209) 327 4243 | Windows, patio, painters | Lodi · San Joaquin County | — | — |
| Lifestyles Audio & Video | Lifestyles Audio & Video | — | (209) 810 0826 | GC, remodel, ADU | Woodbridge · San Joaquin County | — | — |
| Lighthouse General Contracting INC | Michael Edward Serrato | — | (209) 640 2191 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Lightyear Tech INC | Erich Paul Dunajski | — | (209) 329 4723 | Electricians | Lodi · San Joaquin County | — | — |
| Limitless Contracting INC | Robert Wayne Logan | — | (925) 216 1923 | Other roofers | Tracy · San Joaquin County | — | — |
| Linden Steel & Construction INC | Lance Buck Paul Smith | — | (209) 239 2160 | Other | Manteca · San Joaquin County | — | — |
| Linea Electric | Castaneda Villibaldo | — | (408) 518 9805 | Electricians | Manteca · San Joaquin County | — | — |
| Linear West INC | Porfirio Humberto Rodriguez | kevin@linearwest.com | (925) 699 7797 | Other | Tracy · San Joaquin County | — | — |
| Lines Of Integrity Caulking INC | Manuel Alfonso Reyes | — | (209) 609 9939 | Other | Ripon · San Joaquin County | — | — |
| Liquid Design Pools | Joshua Scott Toland | info@liquiddesignacc.com | (209) 597 5277 | Pool | Tracy · San Joaquin County | — | — |
| Lisa M Jennings General Contractor | Lisa M Jennings General Contractor | — | (209) 810 3503 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Lisimani's Concrete | Lisimani's Concrete | — | (209) 640 9825 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Livermore Electric | Morales Braulio | — | (925) 273 4655 | Electricians | Stockton · San Joaquin County | — | — |
| Livewire Solutions | Livewire Solutions | — | (209) 993 5300 | Other | Stockton · San Joaquin County | — | — |
| Lizarraga Painting & Decorating | Lizarraga Painting & Decorating | — | (209) 405 8313 | Windows, patio, painters | Manteca · San Joaquin County | — | — |
| Lj Hetzler Construction | Lee Jefferson Hetzler | micah@micahrich.com | (520) 262 0981 | GC, remodel, ADU | Escalon · San Joaquin County | — | — |
| Lloyd Development INC | Dennis Lee Lloyd | — | (209) 931 9055 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Lockeford Roofing INC | Lonnie Marie Briggs Hall | lockefordroofing@gmail.com | (209) 727 3514 | Other roofers | Lockeford · San Joaquin County | — | — |
| Lodi - California Glass Company INC | Raymond Edward Lilley | — | (209) 369 9300 | Windows, patio, painters | Lodi · San Joaquin County | — | — |
| Lodi Backhoe & Dumptruck Service INC | Barry Allen Thall | — | (209) 993 1541 | Other | Victor · San Joaquin County | — | — |
| Lodi Blinds And Shutters | Lodi Blinds And Shutters | — | (209) 327 5366 | Other | Lodi · San Joaquin County | — | — |
| Lodi Development INC | Michael C Anderson | — | (209) 367 7600 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Lodi Wood Craft | Lodi Wood Craft | — | (209) 712 9452 | Other | Acampo · San Joaquin County | — | — |
| Logan Case Co | William Robert Logan | — | (209) 836 3486 | Other | Tracy · San Joaquin County | — | — |
| Logan Communications LLC | Ryan Christopher Logan | — | (925) 207 2227 | Other | Stockton · San Joaquin County | — | — |
| Loma View Construction | Manuel Angel Lopez Gonzalez | — | (209) 292 4255 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Lomas Group INC | Chris Lomas | — | (925) 667 8547 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Lomeli Roofing | Lomeli Oscar | — | (510) 335 5894 | Other roofers | Stockton · San Joaquin County | — | — |
| Lone Pine Plumbing LLC | Matthew Allen Santos | — | (209) 900 7939 | Other | Manteca · San Joaquin County | — | — |
| Looney Construction Company | Christopher Kenneth Looney | — | (209) 275 4278 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Lopez Innovative Construction | Juan Manuel Lopez Hernandez | — | (209) 817 5169 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Lopezm Construction | Lopez Enrique | — | (209) 298 0548 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Los Altos Flooring INC | Hernandez Bernardo Vargas | — | (408) 841 2567 | Other | Stockton · San Joaquin County | — | — |