| Nl Builders Group INC | Nick Lopez | nick@nlbuildersgroup.com | (831) 682 0356 | GC, remodel, ADU | Salinas · Monterey County | — | — |
| Noble Pride Roofing Company INC | Jesus Eduardo Lopez | administrator@nobleprideroofing.com | (831) 384-3131 | Other roofers | Salinas · Monterey County | — | — |
| Noe Hernandez Landscaping | Noe Hernandez Landscaping | — | (831) 676 7859 | Windows, patio, painters | Salinas · Monterey County | — | — |
| Nonella's Tree Service | Thomas Howard Jr Nonella | — | (831) 373 5356 | Tree | Pacific Grove · Monterey County | — | — |
| Norcal Contractor | Norcal Contractor | — | (831) 238 1513 | Other | Salinas · Monterey County | — | — |
| Norman Naylor Construction | Norman Lee Naylor | — | (831) 333 6407 | GC, remodel, ADU | Monterey · Monterey County | — | — |
| North Bay Painting Company | Adrian Prudente Espinoza | — | (831) 578 7120 | Windows, patio, painters | Moss Landing · Monterey County | — | — |
| North County Tile Company INC | David Leigh Nelson | — | (831) 757 2688 | Other | Castroville · Monterey County | — | — |
| North Pacific Electric | James Christian Roberts | — | (831) 915 8864 | Electricians | Monterey · Monterey County | — | — |
| North Star Construction | Alfred Fowler Seccombe | — | (831) 624 1228 | GC, remodel, ADU | Carmel Valley · Monterey County | — | — |
| North Star Plumbing INC | Gustavo Montiel-Toriz | — | (831) 585 2414 | Other | Seaside · Monterey County | — | — |
| North Star Roofing | North Star Roofing | — | (831) 277-5044 | Other roofers | Seaside · Monterey County | — | — |
| Nova Grounds Landscaping Management | Nova Grounds Landscaping Management | — | (831) 915 9224 | Windows, patio, painters | Monterey · Monterey County | — | — |
| Novak Construction | Craig Michael Novak | — | (831) 214 0197 | GC, remodel, ADU | Carmel · Monterey County | — | — |
| Noyes Construction | Richard Allen Noyes | — | (831) 595 2395 | GC, remodel, ADU | Seaside · Monterey County | — | — |
| Npm INC | Phillip Darren Nicholson | — | (831) 905 5744 | Electricians | Monterey · Monterey County | — | — |
| Nrg Plumbing INC | John Richard Moore | — | (831) 901 9019 | Other | Monterey · Monterey County | — | — |
| Nuno Iron & Manufacturing INC | Marcelino Ii Nuno | — | (831) 386 0513 | GC, remodel, ADU | King City · Monterey County | — | — |
| Nuvision Plumbing Company | Hernandez Brian | — | (831) 498 6787 | Other | Salinas · Monterey County | — | — |
| Nxp Engineering | Francis Enrique Perez Perez | info@nxpengineering.com | (831) 241 8561 | GC, remodel, ADU | Monterey · Monterey County | — | — |
| O P Builders INC | Cisneros Alfonso Ochoa | — | (831) 595 3994 | GC, remodel, ADU | Soledad · Monterey County | — | — |
| O'halloran Construction | Corey Everett O'halloran | — | (831) 601 4952 | GC, remodel, ADU | Carmel · Monterey County | — | — |
| Oak Valley Flooring INC | Jimenez Antolin Sanchez | — | (831) 917 8746 | Other | Salinas · Monterey County | — | — |
| Oasis Stucco | Oasis Stucco | — | (831) 618-2278 | Restoration | Monterey · Monterey County | — | — |
| Ocampo Design | Ocampo Design | — | (831) 277 5899 | Other | Carmel Valley · Monterey County | — | — |
| Ocean Air & Heating | Ocean Air & Heating | — | (831) 476 8200 | HVAC | Aromas · Monterey County | — | — |
| Ocean Breeze Quality Builders | Ocean Breeze Quality Builders | — | (831) 737 3441 | GC, remodel, ADU | Carmel · Monterey County | — | — |
| Ohms Electric Plumbing HVAC Hic Gen Building Construction | Rico Calubag Omictin | — | (831) 578 0196 | Electricians | Salinas · Monterey County | — | — |
| Old Coast Construction INC | Marshall Joseph Moranda | — | (831) 682 5402 | GC, remodel, ADU | Carmel Valley · Monterey County | — | — |
| Old Mission Roofing INC | Francisco V Tinajero | omrbayarea@gmail.com | (831) 998 4848 | Other roofers | Salinas · Monterey County | — | — |
| Old Town Abbey Floors And Blinds | Janna Kay Mccluskey | — | (831) 754 2036 | Other | Salinas · Monterey County | — | — |
| Olin Jordan | Olin Jordan | — | (831) 595 2467 | GC, remodel, ADU | Marina · Monterey County | — | — |
| Olivera's Tree Service | Teodoro Alejo Colores Olivera | — | (831) 588 2585 | Tree | Aromas · Monterey County | — | — |
| Olj Plastering INC | Quiroz Oscar Botello | — | (831) 596 7095 | Other | Salinas · Monterey County | — | — |
| Olson Painting Co | Ronn Rodney Olson | — | (831) 238 5837 | Windows, patio, painters | Carmel · Monterey County | — | — |
| Om & K Builders Company | Vasquez Osvaldo Martinez | — | (831) 975 0766 | GC, remodel, ADU | Castroville · Monterey County | — | — |
| On - Line Fence | On - Line Fence | info@onlinefence.com | (831) 915 3557 | Other | Monterey · Monterey County | — | — |
| On The Level Construction | Jeremy Allen Hallock | — | (831) 920 7875 | GC, remodel, ADU | Del Rey Oaks · Monterey County | — | — |
| One Call Builder Contractors LLC | Matthew Brian Dart | — | (881) 601 4570 | GC, remodel, ADU | Monterey · Monterey County | — | — |
| One Six Welding INC | Augustine Ortega | — | (669) 888 5024 | Other | Salinas · Monterey County | — | — |