| M L Clark Construction And Consulting INC | Christina Michelle Clark | — | (951) 301 6712 | GC, remodel, ADU | Canyon Lake · Riverside County | — | — |
| M L Interiors | M L Interiors | — | (951) 243 0073 | Other | Moreno Valley · Riverside County | — | — |
| M M C Hernandez | Luis Javier Hernandez | — | (951) 232 5871 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| M M's Painting | M M's Painting | — | (760) 848 3578 | Windows, patio, painters | Rancho Mirage · Riverside County | — | — |
| M N S Builders LLC | Tamer Tayser Sara | — | (951) 536 5403 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| M Nadeaus | M Nadeaus | — | (760) 696 2689 | Other | Murrieta · Riverside County | — | — |
| M P A C Mechanical INC | Marcelino Bailon Perez | — | (951) 760 9699 | HVAC | Perris · Riverside County | — | — |
| M P Enterprises | William Harold Drachslin | — | (951) 360 9227 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| M P Foster | M P Foster | — | (805) 218 4000 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| M P M Construction | Manu Pupu Atu Manu | — | (951) 283 9797 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| M R B Flooring Corp | Rueda Mario | — | (951) 380 1802 | Other | Canyon Lake · Riverside County | — | — |
| M R C Builders | Joseph Bernabed Uribe | — | (951) 206 3251 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| M R Mendoza Construction | Ramirez-mendoza Moises | — | (951) 514 0431 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| M R Miller Painting | M R Miller Painting | — | (949) 233 1242 | Windows, patio, painters | La Quinta · Riverside County | — | — |
| M R Pools And Spas | M R Pools And Spas | — | (760) 609 8463 | Pool | Thermal · Riverside County | — | — |
| M R V Electric | Mark Raul Vazquez | — | (760) 578 2140 | Electricians | Cathedral City · Riverside County | — | — |
| M S B Construction | Michael Steven Butchko | — | (951) 686 2242 | HVAC | Riverside · Riverside County | — | — |
| M S Construction | Manuel Sanchez | — | (760) 296 7831 | GC, remodel, ADU | Blythe · Riverside County | — | — |
| M S Construction | Marshall Frank Willia Shephard | — | (951) 922 4714 | GC, remodel, ADU | Banning · Riverside County | — | — |
| M S D Tile Installation A Partnership | Sarah Jo Phelps | — | (760) 578 2762 | Other | Rancho Mirage · Riverside County | — | — |
| M S Flooring INC | Marco Antonio Sanchez Huizar | — | (714) 341 4999 | Other | Jurupa Valley · Riverside County | — | — |
| M S Innovative Construction Corp | Jonathan Solano | — | (951) 660 4918 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| M S Interlocking Pavers Co | Marisol Flores Gaxiola | — | (650) 274 4359 | Other | Cathedral City · Riverside County | — | — |
| M S Lancaster General Contractor | M S Lancaster General Contractor | — | (626) 222 5933 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| M T C Contractor's INC | Juan Antonio| Gomez Tony Gomez Escareno | info@mtccontractors.com | (714) 397 5158 | GC, remodel, ADU | Corona · Riverside County | — | — |
| M T I Construction INC | Gordon Michael Tedder | — | (949) 939 6895 | GC, remodel, ADU | Corona · Riverside County | — | — |
| M T M Painting | M T M Painting | — | (909) 654 9225 | Windows, patio, painters | Beaumont · Riverside County | — | — |
| M T Unlimited Contructors | M T Unlimited Contructors | — | (951) 204 4133 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| M United Plastering INC | Rogelio Obil Merida | — | (951) 790 1999 | Other | Riverside · Riverside County | — | — |
| M V P Commercial | M V P Commercial | jreed@mvpcommercial.com | (951) 314 4734 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| M V Painting | M V Painting | — | (909) 562 2402 | Windows, patio, painters | Banning · Riverside County | — | — |
| M V Plumbing | M V Plumbing | — | (760) 880 9432 | Other | Desert Hot Springs · Riverside County | — | — |
| M W S INC | Kyle Rudy Aezer | — | (760) 717 3187 | Other | Temecula · Riverside County | — | — |
| M W Services INC | Marie Jinky Adtoon Willis | — | (951) 693 5750 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| M Z Scaffold & Construction INC | Michael David Zakharov | — | (951) 465 2760 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| M&c Mechanical | Derek Michael Mcgee | — | (951) 409 8974 | HVAC | Lake Elsinore · Riverside County | — | — |
| M&h Home Builders Corp | Perez-munoz Miguel | — | (714) 856 0807 | GC, remodel, ADU | Corona · Riverside County | — | — |
| M&k Stained Glass | Jeanette Ofelia Linares Avila | — | (323) 794 3151 | Windows, patio, painters | Desert Hot Springs · Riverside County | — | — |
| M&m Construction | Lopez Melesio Martinez | — | (714) 420 1636 | GC, remodel, ADU | Corona · Riverside County | — | — |
| M&m Construction Services INC | Mohammed Muneeruddin | — | (951) 453 3280 | GC, remodel, ADU | Eastvale · Riverside County | — | — |