| Marco Tree Service | Marco Antonio Plancarte Plancarte | — | (209) 321 2795 | Other | Stockton · San Joaquin County | — | — |
| Marconett Construction Co | Bruce Lynn Marconett | — | (209) 324 8524 | GC, remodel, ADU | Escalon · San Joaquin County | — | — |
| Marino Construction Co | James Michael Marini | — | (209) 825 9381 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Mario Castro | Mario Castro | mario@mariocastro.com | (661) 817 4756 | Other | Lathrop · San Joaquin County | — | — |
| Mark Allen Mc Cracken | Mark Allen Mc Cracken | — | (209) 402 8481 | GC, remodel, ADU | Escalon · San Joaquin County | — | — |
| Mark James Construction | Mark James Laub | — | (209) 747 5570 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Mark Jordan Plumbing Co | Mark Anthony Jordan | — | (209) 639 9251 | Other | Stockton · San Joaquin County | — | — |
| Mark Reece Construction | Mark Edwin Reece | — | (209) 996 0646 | GC, remodel, ADU | Escalon · San Joaquin County | — | — |
| Martin Building Services | Steven Paul Martin | — | (209) 836 3668 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Martin Enriquez | Martin Enriquez | — | (209) 479 0612 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Martin Myers Construction | Martin Joseph Myers | — | (209) 450 6456 | GC, remodel, ADU | Escalon · San Joaquin County | — | — |
| Martin's Paving INC | Soto Martin | admin@martinspaving.com | (408) 590 7373 | Other | Tracy · San Joaquin County | — | — |
| Martinez Construction INC | Manuel Joseph Martinez | — | (925) 570 0268 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Martinez Drywall Co | Julio Cesar Martinez | — | (209) 242 1164 | Other | Stockton · San Joaquin County | — | — |
| Martins Painting | Jeremy Bryan Martin | — | (209) 981 9123 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Martinsen Construction INC | Steven Ellis Martinsen | — | (209) 815 8288 | GC, remodel, ADU | Ripon · San Joaquin County | — | — |
| Martinson Electric | David Eric Martinson | david@martinsonelectric.com | (650) 533 4889 | Electricians | Stockton · San Joaquin County | — | — |
| Marty Construction LLC | Maxwell Paul Marty | — | (209) 483 7526 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Marvco Construction | Martin Ii Garcia | — | (209) 403 6574 | GC, remodel, ADU | Linden · San Joaquin County | — | — |
| Marvin L Haley INC | Debra Ann Haley | — | (209) 948 2763 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Master Plumbing | Master Plumbing | — | (209) 221 3257 | Other | Tracy · San Joaquin County | — | — |
| Masterpiece Stone Tile | Masterpiece Stone Tile | — | (650) 228 3574 | Other | Tracy · San Joaquin County | — | — |
| Masters Construction Company | Adrian Lee Keim | — | (209) 570 3142 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Mata Communications | Steven Mitchell Ward | — | (209) 371 1229 | Other | Stockton · San Joaquin County | — | — |
| Mathews Builders INC | Brock Joseph Mathews | — | (209) 609 6169 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Mathews General Engineering And Construction | Nieisha Marie Mathews | — | (209) 650 3614 | Other | Manteca · San Joaquin County | — | — |
| Matthew Bari Arnaiz | Matthew Bari Arnaiz | — | (209) 931 9740 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Maverick Construction Management INC | Michael Arlington Mardis | — | (650) 722 7710 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Max Data Technologies | Max Data Technologies | — | (650) 921 4209 | Other | Stockton · San Joaquin County | — | — |
| Max Flooring INC | Miguel Mosqueda | — | (209) 639 5944 | Other | Stockton · San Joaquin County | — | — |
| Maximum Builders INC | Rajinder Kumar Sharma | — | (408) 412 2990 | Electricians | Manteca · San Joaquin County | — | — |
| Maximum Electric | Joe Lee Sauseda | — | (209) 329 4632 | Electricians | Tracy · San Joaquin County | — | — |
| Maxsim INC | Sonyi Sim | — | (925) 341 8950 | Other | Stockton · San Joaquin County | — | — |
| Maxsim Telecommunications LLC | David Joseph Iii Vavzincak | — | (925) 548 1929 | Other | Stockton · San Joaquin County | — | — |
| Mayan Tile Co | Guerrero Paul | — | (209) 275 5065 | Other | Manteca · San Joaquin County | — | — |
| Mayer Construction Company | Patrick Douglas Mayer | — | (209) 815 7105 | GC, remodel, ADU | Ripon · San Joaquin County | — | — |
| Mb Barron Painting | Mb Barron Painting | — | (209) 597 6981 | Windows, patio, painters | French Camp · San Joaquin County | — | — |
| Mb Custom Builders INC | Samuel Martin | samuelmartin@mbcbuilders.net | (209) 831 9788 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Mb Precision Painting INC | Hernandez Mauricio Bahena | — | (209) 426 1330 | Windows, patio, painters | Lodi · San Joaquin County | — | — |
| Mc Electric | Mark Edward Cardoza | — | (209) 607 8920 | Electricians | Tracy · San Joaquin County | — | — |