| Mark Wayne Celentano | Mark Wayne Celentano | — | (310) 972 0879 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Mark Zeller | Mark Zeller | — | (805) 732 6820 | Electricians | Newbury Park · Ventura County | — | — |
| Mark's Heating & Cooling | Mark's Heating & Cooling | — | (805) 583 5208 | HVAC | Simi Valley · Ventura County | — | — |
| Mark-peter Vander Meyden | Mark-peter Vander Meyden | — | (909) 336 3382 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Marsam Projects INC | David Brandon Friend | — | (805) 836 1508 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Marshall J Field & Co | Marshall Jerold Field | — | (818) 441 1818 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Marshall's Design INC | Karyn Lyons Pepperman | amkryukov@gmail.com | (805) 279 6525 | Other | Camarillo · Ventura County | — | — |
| Martin Carabajal Painting | Martin Carabajal Painting | — | (805) 404 3313 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| Martin Celner Construction | Martin Deny Celner | — | (310) 218 3777 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Martin Construction | John Daniel Martin | — | (805) 529 7503 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Martin Construction | Karl Martin Lindenlaub | — | (805) 405 8656 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Martin J Coe | Martin J Coe | — | (805) 659 6940 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Martin J Coe Construction Co INC | Martin Jeffrey Coe | — | (805) 659 6940 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Martin Roofing Co | Darlene Jo Martin | — | (805) 647 4238 | Other roofers | Saticoy · Ventura County | — | — |
| Martin's Plumbing And Rooter | Martin Leon Mejia | — | (805) 797 8378 | Other | Oxnard · Ventura County | — | — |
| Martin's Rooter & Plumbing | Martin's Rooter & Plumbing | — | (805) 276 5516 | Other | Oxnard · Ventura County | — | — |
| Martinez Tile | Martinez Tile | — | (805) 336 5430 | Other | Oxnard · Ventura County | — | — |
| Marvco INC | Marvin Bernabe Coti | — | (805) 558 4502 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Marvel Electricians | Marvel Electricians | — | (805) 360-3242 | Electricians | Ventura · Ventura County | — | — |
| Marzalek Hardwood Floors | Marzalek Hardwood Floors | — | (805) 231 0493 | Other | Newbury Park · Ventura County | — | — |
| Maskan Concepts INC | Foumani Maskan Kevin Ansary | — | (818) 401 8071 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Master Build INC | Gil Calderon | — | (805) 368 0703 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Master Construction And Maintenance INC | Paul Anthony Iii Gonzales | — | (805) 667 8800 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Master Contractor | Master Contractor | — | (805) 797 3339 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Master Cooling | Master Cooling | — | (805) 378 0050 | HVAC | Moorpark · Ventura County | — | — |
| Master Cooling Corp | Frank Joseph Fazzolare | — | (805) 378 0050 | HVAC | Moorpark · Ventura County | — | — |
| Master Express Garage Doors | Master Express Garage Doors | — | (818) 657 9168 | Other | Simi Valley · Ventura County | — | — |
| Master Frame Works INC | Aguilar Eusebio Salas | — | (805) 421 3927 | GC, remodel, ADU | Fillmore · Ventura County | — | — |
| Master Plastering | Ramon Sr Sanchez Magana | — | (805) 616 4925 | Other | Oxnard · Ventura County | — | — |
| Master Touch Finish Carpentry | Master Touch Finish Carpentry | — | (805) 216 3266 | Other | Oxnard · Ventura County | — | — |
| Master Tree Service INC | Christopher Paredes | — | (805) 760 1020 | Other | Oxnard · Ventura County | — | — |
| Master Tub Reglazing INC | Sergio Alberto Lopez-Flores | — | (805) 908 5569 | Other | Thousand Oaks · Ventura County | — | — |
| Master's Flooring | Master's Flooring | — | (805) 340 4945 | Other | Ventura · Ventura County | — | — |
| Master's Touch Painting And Decorating | Master's Touch Painting And Decorating | — | (805) 276 6006 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Mastercraft | John David Bethards | care@mastercraft.com | (805) 795 4646 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Masterpiece Carpentry INC | Ryan Michael Baker | — | (805) 540 4338 | Other | Westlake Village · Ventura County | — | — |
| Masterpiece Roofing Co | Russell Dale Stevens | — | (805) 276 8646 | Other roofers | Camarillo · Ventura County | — | — |
| Masters Design And Construction | Michael Richard Peckfelder | — | (805) 947 7067 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Mastery Tile & Stone | Mastery Tile & Stone | — | (805) 648 3000 | Other | Santa Paula · Ventura County | — | — |
| Mateo Roman Hernandez | Mateo Roman Hernandez | — | (805) 863 4196 | GC, remodel, ADU | Oxnard · Ventura County | — | — |