| Marquez Brothers Plastering Corp | Jose Arturo Marquez Estala | — | (310) 962 6194 | Other | Corona · Riverside County | — | — |
| Marquez Construction | Marquez Navarro Jaime | — | (951) 691 0582 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Marquez Electrical Services INC | Robert Lee Brice | — | (949) 394 4782 | Electricians | Riverside · Riverside County | — | — |
| Marquez Landscaping INC | Marquez Bruno | — | (951) 928 4362 | Windows, patio, painters | Nuevo · Riverside County | — | — |
| Marquez Pools Construction INC | Marquez Ismael Marquez | — | (760) 409 5619 | Pool | Cathedral City · Riverside County | — | — |
| Marquis Johnson | Marquis Johnson | — | (909) 358 9470 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Marroquin's Landscaping & Maintenance Services INC | Henry Geovany Marroquin | — | (951) 925 7042 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Marshall Construction | Mark Clayton Marshall | — | (951) 317 6744 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Marshall Mark Jr | Marshall Mark Jr | — | (951) 973 3305 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Marshall Tile | Marshall Tile | — | (562) 631 3064 | Other | Corona · Riverside County | — | — |
| Marshall's Contracting | Marshall Gregory Beauchat | — | (951) 323 2451 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| Marshalls Concrete | Marshalls Concrete | — | (951) 780 8903 | Other | Riverside · Riverside County | — | — |
| Marshman Construction INC | Gary Austin Marshman | — | (951) 698 3550 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Mart Construction | Martinez Brian | brian@mart-construction.com | (951) 870 7388 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Martblanc Corporation | Cordero Jose Alfredo Blanco | — | (951) 730 2949 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Martell Home Improvements INC | Jorge Alberto Martell | — | (925) 250 4255 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| Martin A Diaz | Martin A Diaz | — | (760) 728 1204 | Other roofers | Murrieta · Riverside County | — | — |
| Martin C Ahlgrim DBA Ahl-tech Construction | Martin Carl Ahlgrim | — | (951) 609 4043 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Martin Cabrera | Martin Cabrera | — | (310) 598 8450 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Martin Concrete Removal | Martin Concrete Removal | — | (951) 217 2482 | Other | Canyon Lake · Riverside County | — | — |
| Martin Construction | Jorge Carlos Martin | — | (909) 747 7645 | GC, remodel, ADU | Banning · Riverside County | — | — |
| Martin Family HVAC INC | William Tom Martin | martinfamilyhvac@gmail.com | (909) 374 1310 | HVAC | Nuevo · Riverside County | — | — |
| Martin Mendoza Ramirez | Martin Mendoza Ramirez | — | (951) 852 0897 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Martin Reyes Romero | Martin Reyes Romero | — | (760) 574 2243 | Windows, patio, painters | Indio · Riverside County | — | — |
| Martin T Baggott | Martin T Baggott | — | (760) 413 3970 | GC, remodel, ADU | Palm Springs · Riverside County | — | — |
| Martin Tile & Stone | Martin Tile & Stone | — | (951) 312 3318 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Martin Walker | Martin Walker | — | (951) 741 6069 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Martin's Landscaping | Martin's Landscaping | martinsluling@gmail.com | (951) 579 0808 | Windows, patio, painters | Lake Elsinore · Riverside County | — | — |
| Martinez & Sons Painting INC | Jorge Luis Martinez | — | (909) 762 4549 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| Martinez Electric | Juan Ramon Martinez | interested@domainmarket.com | (760) 834 5570 | Electricians | Cathedral City · Riverside County | — | — |
| Martinez Glass Doors | Martinez Glass Doors | — | (760) 464 4180 | Windows, patio, painters | Rancho Mirage · Riverside County | — | — |
| Martinez Greenview Landscape | Martinez Greenview Landscape | — | (760) 972 1327 | Windows, patio, painters | Coachella · Riverside County | — | — |
| Martinez Landscape Designs | Armando Jr Martinez | — | (951) 227 1100 | Windows, patio, painters | Norco · Riverside County | — | — |
| Martinez Roofing | Martinez Alberto | interested@domainmarket.com | (714) 448 8648 | Other roofers | Riverside · Riverside County | — | — |
| Martinez Steel | Martinez Steel | — | (951) 785 0166 | Other | Riverside · Riverside County | — | — |
| Martinez Tile | Martinez Tile | — | (760) 600 0034 | Other | Indio · Riverside County | — | — |
| Martinscapes | Christian Patrick Martin | — | (951) 536 1940 | Windows, patio, painters | Anza · Riverside County | — | — |
| Marv Engineering | Marv Engineering | — | (909) 727 9977 | Other | Moreno Valley · Riverside County | — | — |
| Marv Guida Flooring | Marv Guida Flooring | — | (951) 840 7754 | Other | Riverside · Riverside County | — | — |
| Marvel Llamas Plumbing INC | Valdez Marbel Llamas | — | (760) 871 3167 | Other | Perris · Riverside County | — | — |