| Magallon Construction Co INC | Magallon Manuel | — | (209) 883 4483 | GC, remodel, ADU | Hughson · Stanislaus County | — | — |
| Magic Carpet & Flooring INC | Felipe De Jesus Ruiz Gurrola | — | (209) 872 2953 | Other | Keyes · Stanislaus County | — | — |
| Main Electric LLC | Eric Dean Ramirez | — | (209) 250 1032 | Electricians | Turlock · Stanislaus County | — | — |
| Majestic Mechanical Corporation | Christian Adan Padilla Mejia | 391-4528info@majesticmechanical.com | (209) 900 7384 | HVAC | Modesto · Stanislaus County | — | — |
| Major Enterprizes | Major Enterprizes | — | (209) 329 5929 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Malone's Landscape INC | Charles Thomas Malone | — | (209) 495 9581 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Mancebo Dairy Construction INC | Grace Marie Mancebo | — | (209) 632 7392 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Manes Masonry | Oscar Carmona | — | (209) 566 8410 | Other | Salida · Stanislaus County | — | — |
| Manny's Construction | Emanuel Lajin Dinkha | — | (209) 541 4354 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Manuel Bernal | Manuel Bernal | — | (209) 571 0476 | Other | Modesto · Stanislaus County | — | — |
| Manzera Pools INC | Armando Santiago Mancera Zuniga | — | (209) 737 5458 | Pool | Patterson · Stanislaus County | — | — |
| Manzo Concrete | Manzo Concrete | — | (209) 765 8216 | Other | Ceres · Stanislaus County | — | — |
| Marchaas Drywall | Marchaas Drywall | — | (620) 319 7111 | Other | Modesto · Stanislaus County | — | — |
| Marchbanks Electric | Wayne Denton Marchbanks | — | (209) 678 5203 | Electricians | Turlock · Stanislaus County | — | — |
| Mardev Group INC | John Arthur Marquez | — | (209) 487 0671 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Mario Del Carpio Painting Contractor | Mario Del Carpio Painting Contractor | — | (209) 892 8338 | Windows, patio, painters | Patterson · Stanislaus County | — | — |
| Mario Mendoza | Mario Mendoza | — | (209) 604 3410 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Mark B Hawley | Mark B Hawley | — | (209) 605 3299 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Mark Geiszler Construction | Mark Calvin Geiszler | — | (209) 606 5156 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Mark Gutierrez | Mark Gutierrez | — | (209) 345 0928 | HVAC | Turlock · Stanislaus County | — | — |
| Mark Rosa Construction | Mark Allen Rosa | — | (209) 961 0987 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Marke Electrical Services | Mark Warren Faulder | — | (209) 634 7749 | Electricians | Turlock · Stanislaus County | — | — |
| Marquez Cabinet Solutions | Marquez Edgardo | — | (909) 343 0623 | Other | Patterson · Stanislaus County | — | — |
| Marshall Perry Construction INC | Tyler David Hosman | — | (209) 918 1567 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Marten J Oliveira | Marten J Oliveira | — | (209) 668 9254 | Electricians | Turlock · Stanislaus County | — | — |
| Martin Moran Roofing | Martin Donald Moran | — | (209) 315 5553 | Other roofers | Riverbank · Stanislaus County | — | — |
| Martin Plumbing | Martin Plumbing | — | (209) 845 0300 | Other | Oakdale · Stanislaus County | — | — |
| Martz Designs Plumbing INC | Juan Eduardo Martinez | — | (669) 300 7103 | GC, remodel, ADU | Patterson · Stanislaus County | — | — |
| Masellis Drilling INC | Scott James Masellis | — | (209) 522 1928 | Other | Modesto · Stanislaus County | — | — |
| Master Color Painting | Master Color Painting | stevedesbiens9@gmail.com | (707) 303-5930 | Windows, patio, painters | Riverbank · Stanislaus County | — | — |
| Master's Touch Painting And Decorating | Charles Edward Sr Neal | — | (209) 869 6238 | Windows, patio, painters | Riverbank · Stanislaus County | — | — |
| Mastercraft Painting Mcp | Mastercraft Painting Mcp | — | (209) 241 0309 | Windows, patio, painters | Turlock · Stanislaus County | — | — |
| Masterson Floor Covering | Masterson Floor Covering | — | (209) 277 5621 | Other | Turlock · Stanislaus County | — | — |
| Mathew David Continillo | Mathew David Continillo | — | (925) 989 9070 | GC, remodel, ADU | Hickman · Stanislaus County | — | — |
| Mathew Ramos General Contractor | Mathew Ramos General Contractor | — | (209) 968 6321 | GC, remodel, ADU | Riverbank · Stanislaus County | — | — |
| Matt Anderson Electric INC | Gina Yvette Anderson | office@mattandersonelectric.com | (209) 495 8921 | Electricians | Turlock · Stanislaus County | — | — |
| Matteri's Heating & Air | Matteri's Heating & Air | — | (209) 648 5354 | HVAC | Crows Landing · Stanislaus County | — | — |
| Max Fencing | Max Fencing | — | (209) 496 0736 | Other | Modesto · Stanislaus County | — | — |
| Mbj Plumbing INC | Oscar Diaz | — | (209) 595 7020 | Other | Ceres · Stanislaus County | — | — |
| Mbm Landscape INC | Balladares Manuel Mendez | — | (209) 484 2598 | Windows, patio, painters | Empire · Stanislaus County | — | — |