| Micom INC | James Carmel Cirivello | — | (951) 867 3100 | Electricians | Riverside · Riverside County | — | — |
| Microcool | Justin Raymond Armstrong | — | (760) 834 3350 | Other | Thousand Palms · Riverside County | — | — |
| Microlux Homes | Brendhan O'neal Morris | — | (909) 648 4078 | GC, remodel, ADU | Calimesa · Riverside County | — | — |
| Mida Bella Contracting | Micheal Alfred Golovich | — | (760) 333 3329 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Middle Housing Construction | Jared Scott Jones | — | (951) 435 2000 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Midpoint Electric | Vargas Ignacio | — | (951) 505 0058 | Electricians | Mira Loma · Riverside County | — | — |
| Midwest Glass & Aluminum | Walter John Jahnig | — | (760) 341 7725 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| Mighty Electric LLC | Michael Anthony Silva | iamsomphop@gmail.com | (951) 751 3051 | Electricians | Corona · Riverside County | — | — |
| Mighty Plumbers | Erik Cain Hermosillo | — | (760) 390 8899 | Other | Winchester · Riverside County | — | — |
| Miguel A Contracting | Miguel Angel Ortega | — | (951) 232 1497 | Other | Jurupa Valley · Riverside County | — | — |
| Miguel Angel Jr Nevarez DBA Mdn Tile Co | Miguel Angel Jr Nevarez | — | (909) 658 4282 | Other | Banning · Riverside County | — | — |
| Miguel Camacho Gazca | Miguel Camacho Gazca | — | (760) 393 6057 | Windows, patio, painters | Coachella · Riverside County | — | — |
| Miguel Carbajal | Miguel Carbajal | — | (760) 288 6079 | GC, remodel, ADU | Desert Hot Springs · Riverside County | — | — |
| Miguel Huizar | Miguel Huizar | — | (951) 580 8487 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Miguel Martinez | Miguel Martinez | contact@miguelmartinez.com | (951) 525 9119 | Windows, patio, painters | Nuevo · Riverside County | — | — |
| Miguel Santana | Miguel Santana | — | (714) 553 3019 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Miguel Santillan DBA Dream Pools Construction | Miguel Domaciano Santillan Vasquez | — | (951) 503 2012 | Pool | Perris · Riverside County | — | — |
| Miguel Taira General Contractor | Miguel Taira General Contractor | — | (760) 427 3831 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| Miguel's Custom Painting | Miguel's Custom Painting | — | (951) 738 9750 | Windows, patio, painters | Corona · Riverside County | — | — |
| Miguel's Pool & Spa INC | Miguel Angel Regalado | — | (760) 275 3208 | Pool | Cathedral City · Riverside County | — | — |
| Miguelangelo And Company INC | Gregory Allen Lee-Leon | — | (760) 464 1164 | Windows, patio, painters | Rancho Mirage · Riverside County | — | — |
| Miguelectric | Miguel Angel Jr Ramirez | miguelectric1@gmail.com | (562) 322 6191 | Electricians | Beaumont · Riverside County | — | — |
| Miguels Painting | Miguels Painting | support@webador.com | (951) 492 5242 | Windows, patio, painters | Hemet · Riverside County | — | — |
| Migz General Contracting | Miguel Angel Gutierrez | — | (760) 668 0003 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| Mike Borden Painting | Mike Borden Painting | — | (951) 212 6296 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Mike Dan | Mike Dan | — | (619) 775 8606 | Other | Murrieta · Riverside County | — | — |
| Mike Gara Painting | Mike Gara Painting | — | (951) 677 8830 | Windows, patio, painters | Murrieta · Riverside County | — | — |
| Mike Hixson Backhoe Service INC | Tracie Elaine Hixson | — | (951) 677 6212 | Other | Murrieta · Riverside County | — | — |
| Mike Kaminski Construction | Michael Ryan Kaminski | — | (909) 947 1077 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Mike Kang Electric | Michael Choicu Kang | — | (949) 337 2245 | Electricians | Eastvale · Riverside County | — | — |
| Mike Land Construction INC | Michael Thomas Jr Land | — | (951) 894 4961 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Mike Larrabure Construction | Mike William Larrabure | — | (951) 760 0370 | GC, remodel, ADU | Idyllwild · Riverside County | — | — |
| Mike Lenerd Construction | Michael Timothy Lenerd | — | (209) 345 6415 | GC, remodel, ADU | Palm Springs · Riverside County | — | — |
| Mike Lozano Professional Pool Construction & Remodeling | Mike David Lozano | — | (760) 275 4647 | Pool | Palm Desert · Riverside County | — | — |
| Mike Norman | Mike Norman | — | (909) 499 8657 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Mike Payne & Associates INC | James Michael Payne | — | (951) 674 8377 | Other | Wildomar · Riverside County | — | — |
| Mike Purczynski Construction | Michael Andrew Purczynski | — | (760) 801 4424 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Mike Randall | Mike Randall | — | (951) 232 7621 | Other | Corona · Riverside County | — | — |
| Mike Sampson | Mike Sampson | — | (714) 614 4947 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Mike Zarp INC | Michael Bruce Zarp | — | (909) 946 7017 | Other | Corona · Riverside County | — | — |