| Makes Fire Protection LLC | Jeremy Tramel Makes | — | (951) 537 0181 | Other | San Jacinto · Riverside County | — | — |
| Mako Construction | Marios Panos Ignelis | — | (951) 696 0159 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Malbec Builders | Blake Allan Petrowich | info@gbmcapital.org | (760) 625 9977 | GC, remodel, ADU | Rancho Mirage · Riverside County | — | — |
| Malcolm Aton | Malcolm Aton | — | (562) 266 7714 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Maldonado Flooring Corporation | Juan Carlos Maldonado | — | (714) 932 1454 | Other | Riverside · Riverside County | — | — |
| Maldonado Tile & Marble INC DBA Maldo Construction Services | Maldonado Brandon | — | (714) 273 9106 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Maldonado's Lathing & Plastering INC | Mauro Ernesto Maldonado Renteria | — | (951) 422 0379 | Other | Riverside · Riverside County | — | — |
| Malek Engineering And Construction | Sean Abotaleb Malekzadeh | — | (808) 344 7637 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Malek General Contracting | Malek Ferdinand | — | (951) 767 9659 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Maley Construction | Shawn Lawrence Maley | — | (951) 681 3578 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Malibu Pools | Malibu Pools | — | (951) 232 6451 | Pool | Hemet · Riverside County | — | — |
| Malier Contractors INC | Tony Avila Jara | — | (951) 784 5270 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Maloney & Sons | Maloney & Sons | — | (760) 831 3674 | GC, remodel, ADU | Mountain Center · Riverside County | — | — |
| Maltan's Construction INC | Gladys Annabelle Quiel | — | (909) 963 8695 | GC, remodel, ADU | Beaumont · Riverside County | — | — |
| Mana Building Co | Maximus Nguyen | — | (714) 785 4555 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Management One Property Management | Management One Property Management | — | (951) 735-2000 | Property managers | Riverside · Riverside County | — | — |
| Mane Paints Corp | Veronica Elizabeth Casarin | — | (951) 503 4300 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| Manferd Construction | Michael Lee Schade | — | (714) 813 3281 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Manhole Builders INC | Eric Michael Hundley | — | (951) 681 0601 | Other | Corona · Riverside County | — | — |
| Manhole Builders West | Eric Michael Hundley | — | (951) 681 0601 | Other | Corona · Riverside County | — | — |
| Manhole Construction Specialists INC | Paul D Williams | — | (951) 246 3476 | Other | Murrieta · Riverside County | — | — |
| Manifest Painting | Manifest Painting | — | (951) 732 3803 | Windows, patio, painters | Winchester · Riverside County | — | — |
| Mann Boy Construction | Corey Allen Mann | — | (760) 978 5305 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Mann Construction | Mann Duc Vuong | debbie@mannconstruction.com | (951) 275 4964 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Mann's Flooring INC | Shaun Michael Mann | — | (951) 987 1112 | Other | Riverside · Riverside County | — | — |
| Manna Roofing Company | Bradley Jacob Fortune | — | (562) 445 9394 | Other roofers | Riverside · Riverside County | — | — |
| Manning Enterprizes | Manning Enterprizes | — | (760) 321 2681 | Other | Cathedral City · Riverside County | — | — |
| Manning Plumbing | Manning Plumbing | — | (626) 786 5301 | Other | Norco · Riverside County | — | — |
| Manning Tile And Stone DBA Manning Tile | Ricky Lee Manning | — | (951) 207 9852 | Other | Lake Elsinore · Riverside County | — | — |
| Manny The Tint Guy | Manny The Tint Guy | — | (442) 300 5991 | Other | La Quinta · Riverside County | — | — |
| Manny Vargas Air Conditioning & Heating INC | Manuel Dominguez Vargas | — | (760) 398 8034 | HVAC | Indio · Riverside County | — | — |
| Manny's Fuel Pump Tech | Manuel Castulo Cortes | — | (951) 538 8111 | Other | Riverside · Riverside County | — | — |
| Mansperger Electric INC | Larry Gene Jr Mansperger | — | (951) 830 5220 | Electricians | Norco · Riverside County | — | — |
| Manuel Contreras Martinez | Manuel Contreras Martinez | — | (760) 601 6799 | Other | Indio · Riverside County | — | — |
| Manuel Rodriguez | Manuel Rodriguez | — | (760) 333 8082 | Other | Coachella · Riverside County | — | — |
| Manuel Rodriguez Vasquez DBA Wrights Property Service | Manuel Rodriguez Vasquez | — | (951) 538 8572 | GC, remodel, ADU | Mira Loma · Riverside County | — | — |
| Manuel's Electric | Jose Manuel Carrillo | — | (951) 941 2910 | Electricians | Banning · Riverside County | — | — |
| Manufacturer Blinds By Gory's Draperies | Manufacturer Blinds By Gory's Draperies | — | (951) 751 6952 | Other | Riverside · Riverside County | — | — |
| Manufacturing Services Unlimited - Msu | William Leroy Green | — | (951) 789 0811 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Manzano Concrete Restoration | Brian Gabriel Manzano | — | (951) 436 8214 | Restoration | Moreno Valley · Riverside County | — | — |