| Mccarthy Electric | Joseph Gerard Ii Mccarthy | — | (951) 440 4011 | Electricians | Temecula · Riverside County | — | — |
| Mcci | Jaime Giorgio Rene Morfin | — | (951) 207 0090 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| Mcclain Jeff | Mcclain Jeff | — | (951) 679 8364 | Other | Wildomar · Riverside County | — | — |
| Mccloskey Plumbing | Mccloskey Plumbing | — | (951) 378 3749 | Other | Canyon Lake · Riverside County | — | — |
| Mcclure Homes Design Build LLC | Mark Clinton Mcclure | — | (818) 281 1781 | GC, remodel, ADU | La Quinta · Riverside County | — | — |
| Mccormick's Electrical | John Patrick Jr Mccormick | info@mccormickselectrical.com | (858) 344 6048 | Electricians | Wildomar · Riverside County | — | — |
| Mccourt & Sons INC | Jason Tyler Mc Court | — | (951) 677 2320 | HVAC | Temecula · Riverside County | — | — |
| Mccray Plumbing | Mccray Plumbing | — | (951) 428 8000 | Other | Wildomar · Riverside County | — | — |
| Mcdonnell Roofing INC | Eugene Patrick| Mc Donnell Gene Mc Donnell | info@mcdonnellroofing.com | (714) 844 2814 | Other roofers | Riverside · Riverside County | — | — |
| Mcg Home Painitng Services | Mark Christopher Giamarino | — | (760) 625 5249 | Windows, patio, painters | Bermuda Dunes · Riverside County | — | — |
| Mcgee Industries INC - California | Charles Cian Mcgee | — | (907) 245 8290 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Mcginnis Construction | Kevin Jon Mcginnis | — | (209) 743 2176 | GC, remodel, ADU | Canyon Lake · Riverside County | — | — |
| Mcgowan Concrete INC | Jeff Richard Mc Gowan | — | (760) 401 2848 | Other | La Quinta · Riverside County | — | — |
| Mcgrant Engineering | Kelsey Allison Lynch | — | (619) 581 9395 | Other | Temecula · Riverside County | — | — |
| Mcgurk Electric | Chelsea Gabriela Mcgurk | — | (951) 902 9752 | Electricians | Norco · Riverside County | — | — |
| Mci Construction Company | Louis John Olson | info@mciconstruction.com | (760) 799 5106 | GC, remodel, ADU | Indio · Riverside County | — | — |
| Mci Contractors INC | Louis John Olson | — | (760) 799 5106 | GC, remodel, ADU | Indio · Riverside County | — | — |
| Mcintyre Homes INC | Douglas George Mc Intyre | — | (714) 822 1084 | GC, remodel, ADU | Indian Wells · Riverside County | — | — |
| Mckee Electrical Contracting | Jared Alan Mckee | jmckee@mckeeelectricalcontracting.com | (951) 283 6968 | Electricians | Riverside · Riverside County | — | — |
| Mcknight Construction | Joseph Merl Mc Knight | — | (805) 324 3844 | GC, remodel, ADU | N Palm Springs · Riverside County | — | — |
| Mclain And Sons Incorporated | Charles Edward Mc Lain | — | (714) 863 5546 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Mcmillan Vision INC | Jerry Edward Ii Mc Millan | — | (951) 303 0773 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Mcminn Equipment Rental & Leasing INC | James Arlis Mc Minn | — | (951) 453 0821 | Other | Riverside · Riverside County | — | — |
| Mcnamara's Painting | Mcnamara's Painting | — | (951) 840 0906 | Windows, patio, painters | Perris · Riverside County | — | — |
| Mcnamara-torres Painting LLC | Janis Ann Torres | — | (951) 852 9432 | Windows, patio, painters | Canyon Lake · Riverside County | — | — |
| Mcp Engineering | Perez Carlos | sales@mcp-engineering.com | (562) 456 7730 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Mcpherson Bros Plumbing | Michael Gregory Mcpherson | — | (951) 329 1656 | Other | Moreno Valley · Riverside County | — | — |
| Mcpherson Construction Company | Daniel Robert Mcpherson | — | (951) 435 9830 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Mcrae Heating & Air | Mcrae Heating & Air | — | (619) 961 9691 | HVAC | Temecula · Riverside County | — | — |
| Mcrae Pools & Spas | Mcrae Pools & Spas | — | (760) 774 6343 | Windows, patio, painters | La Quinta · Riverside County | — | — |
| Mcs Plumbing | Mcs Plumbing | — | (951) 235 0825 | Other | Hemet · Riverside County | — | — |
| Md Prestige Construction | Mohsen Mokari Dastgerdi | — | (949) 632 4241 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Mda Construction Remodels INC | Matthew David Aguilar | — | (760) 417 3581 | GC, remodel, ADU | Desert Hot Springs · Riverside County | — | — |
| Mdh Quality Construction | Miguel Garcia-Amaro | info@mdhqualityconstruction.com | (714) 496 5260 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Mdi Construction INC | Michael Amel Dean | — | (951) 361 2690 | GC, remodel, ADU | Mira Loma · Riverside County | — | — |
| Mdi Interiors | Mary Sue Nunnally | — | (951) 343 0092 | Other | Riverside · Riverside County | — | — |
| Mdl Universal Contracting | Lucci Anthony | — | (760) 832 6445 | GC, remodel, ADU | Palm Springs · Riverside County | — | — |
| Mds Flooring Covering Corp | Sandra Luz Zapata | — | (951) 324 1152 | Other | Riverside · Riverside County | — | — |
| Mead Construction INC | John Matthew Gormly | — | (321) 255-3920 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Meca Industrial LLC | David Ramirez Orozco | — | (951) 285 2560 | Other | Wildomar · Riverside County | — | — |