| Mission A / C And Furnace | Sanchez Carrasco Florentino | — | (408) 597 5130 | HVAC | Hollister · San Benito County | — | — |
| Mission Pest Control | Mission Pest Control | customercare@missionpestcontrol.com | (760) 301-5808 | Pest, tile roofs | Carlsbad · San Benito County | — | — |
| Mizo Electric | Mizo Electric | office@mizoelectric.com | (858) 400-4590 | Electricians | Del Mar · San Benito County | — | — |
| Moeller Construction | Gregory Scott Moeller | — | (831) 801 9107 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Molina's Technical Plumbing Repair | Molina's Technical Plumbing Repair | — | (408) 310 9899 | Other | Hollister · San Benito County | — | — |
| Montilla Construction | Alvaro Jr Montilla | — | (408) 309 6241 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Montoya Landscaping INC | Montoya Alfredo | — | (408) 722 4292 | Windows, patio, painters | Hollister · San Benito County | — | — |
| Mullins Construction LLC | Christopher Scott Mullins | — | (831) 206 0899 | GC, remodel, ADU | San Juan Bautista · San Benito County | — | — |
| Mustafa Painting Corp | Pedro Julio Mustafa | — | (408) 612 7509 | Windows, patio, painters | Hollister · San Benito County | — | — |
| Mv Nation Excavation | Mv Nation Excavation | marvalle6@gmail.com | (408) 427 2242 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Mv Properties | Mv Properties | — | (858) 299-3905 | Property managers | Del Mar · San Benito County | — | — |
| My Heating & Air | My Heating & Air | — | (619) 300 7893 | HVAC | Hollister · San Benito County | — | — |
| N Ramirez Landscape & Construction | Ramirez Vasquez Noe | — | (408) 843 7971 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Nancy Elizabeth Sanchez-smit | Nancy Elizabeth Sanchez-smit | — | (408) 968 0421 | Electricians | Hollister · San Benito County | — | — |
| Nelson's Pool Service | Michael Allan Nelson | — | (831) 637 8260 | Pool | Hollister · San Benito County | — | — |
| New Leaf Landscapes Incorporated | Javier Francisco Quesada | — | (831) 801 8797 | Windows, patio, painters | Hollister · San Benito County | — | — |
| New Legacy Construction LLC | Martinez Diaz Abraham | — | (831) 800 6653 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Next Level Commercial Builders | Hernandez Fernando Barragan | — | (408) 910 7385 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Nine Star Drywall | Jorge Alberto Branquinho | — | (831) 635 0710 | Other | Hollister · San Benito County | — | — |
| Nino Development INC | Michael Joseph Nino | — | (831) 635 0745 | GC, remodel, ADU | Tres Pinos · San Benito County | — | — |
| Nobile Made INC | James Howard Johnston | — | (480) 747 4732 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Nock-it INC | Mavrick Willem Enz | — | (831) 902 9713 | GC, remodel, ADU | Tres Pinos · San Benito County | — | — |
| Nor-cal Insulation INC | Claudia Bermudez Nunez | — | (831) 313 0095 | Other | Hollister · San Benito County | — | — |
| Nor-cal Trenchless Sewer And Drain INC | Jason Christopher Williams | — | (831) 801 8648 | Other | Hollister · San Benito County | — | — |
| Norcal Renovations | Norcal Renovations | — | (408) 396 8443 | GC, remodel, ADU | San Juan Bautista · San Benito County | — | — |
| Noriega Construction & Electric INC | Julio Noriega | — | (831) 902 7088 | Electricians | Hollister · San Benito County | — | — |
| North County Premier Property Management | North County Premier Property Management | gail@ncppm.com | (760) 585-5841 | Property managers | Carlsbad · San Benito County | — | — |
| Novitas Engineering INC DBA Jm Industrial | Joseph Michael Torquato | — | (831) 801 9984 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Nunez Brothers Builders INC | Mario Valencia-Perez | — | (831) 245 6653 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| O C Tile & Stone | O C Tile & Stone | info@pacific-landmark.com | (831) 801 1654 | Other | Hollister · San Benito County | — | — |
| O G Landscaping INC | Gamino Alcadio Olguin | — | (408) 722 5687 | Windows, patio, painters | Hollister · San Benito County | — | — |
| O R A Const | O R A Const | — | (408) 590 8566 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Oak Creek Plumbing | Oak Creek Plumbing | — | (831) 902 2537 | Other | Hollister · San Benito County | — | — |
| Ocean Plastering INC | Francisco Javier Gomez Alcaraz | — | (669) 206 8750 | Other | Hollister · San Benito County | — | — |
| Old World Iron Automatic Gates | Diana Victoria Serrano | — | (408) 218 7983 | Other | Hollister · San Benito County | — | — |
| Oncore Builders INC | Gilbert Tafoya | — | (831) 277 6099 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| One Day Installation & Repairs INC | Alexandra Azarashvili | — | (408) 205 4112 | HVAC | San Juan Bautista · San Benito County | — | — |
| One Source Integration | One Source Integration | — | (408) 592 2909 | Other | Hollister · San Benito County | — | — |
| Onyx Concrete | Onyx Concrete | — | (831) 297 4624 | Other | Hollister · San Benito County | — | — |
| Ortega Custom Builders | Ortega Custom Builders | sammyocb@aol.com | (408) 315 1388 | GC, remodel, ADU | Hollister · San Benito County | — | — |