| N J H Construction | Nicholas James Haycock | — | (925) 922 9206 | GC, remodel, ADU | Dublin · Alameda County | — | — |
| N S S E T | Steve Haralambiew | — | (510) 483 1637 | Electricians | San Leandro · Alameda County | — | — |
| N T Construction | Nuku Tavake Havea | — | (518) 568 1422 | Other | Hayward · Alameda County | — | — |
| N V Painting | N V Painting | — | (510) 927 7202 | Windows, patio, painters | Oakland · Alameda County | — | — |
| N Y T Roofing LLC | Angel Giovanni Quezada | — | (510) 978 6636 | Other roofers | Hayward · Alameda County | — | — |
| N2 Electric INC | Nicholas Kelly Mc Daid | — | (925) 447 8882 | Electricians | Livermore · Alameda County | — | — |
| Nabu Energy LLC | James Yongsung Kang | monitunleashed@gmail.com | (415) 812 1029 | Electricians | Newark · Alameda County | — | — |
| Nafco Property Services | Nolan Adam Fisher | — | (510) 363 7038 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Nagomi Landscape INC | Sato Masakazu | — | (408) 596 0080 | Windows, patio, painters | Fremont · Alameda County | — | — |
| Nailed It Remodeling INC | Josue Francisco Ramos | — | (408) 477 9053 | GC, remodel, ADU | Albany · Alameda County | — | — |
| Najib Paint & Decorations LLC | Najibullah Nazari | — | (925) 316 8182 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Nancy Smith Construction INC | Kristie Lynn Smith | — | (510) 714 5039 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Napta Construction | Mutaz Babiker Hami Khalf | — | (510) 361 6846 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Nar Hardwood INC | Navruz Dzhurayev | — | (650) 608 1322 | Other | Alameda · Alameda County | — | — |
| Nate Johnson | Nate Johnson | — | (510) 414 6342 | Electricians | Berkeley · Alameda County | — | — |
| National Air Balance Company INC | Gregory James Rothe | — | (510) 623 7000 | Other | Pleasanton · Alameda County | — | — |
| National Development Capitol | National Development Capitol | — | (650) 208 4171 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| National Energy Services INC DBA Sound HVAC Solutions | Todd A Bishop | — | (503) 991 1077 | HVAC | Livermore · Alameda County | — | — |
| National Floors | Anthony Gino Campagna | — | (510) 468 4165 | Other | Fremont · Alameda County | — | — |
| Nationwide Boiler Incorporated | Larry Keith Day | — | (510) 490 7100 | HVAC | Fremont · Alameda County | — | — |
| Native Design Painting | Native Design Painting | — | (510) 723 4450 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Native Soil INC | Angelina Miranda Perez | — | (510) 332 9048 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Native Sons Construction | Kermit Leon Franks | — | (707) 494 7786 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Natural Landscape Maintenance INC | Eva Karina Murillo De La Cruz | — | (925) 518 8903 | Windows, patio, painters | Livermore · Alameda County | — | — |
| Nature's Design | Nature's Design | — | (510) 482 2408 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Nature's Wood | Nature's Wood | — | (510) 207 7989 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Natures Edge INC | Adolfo Jr Alan | — | (510) 750 6479 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Navarro Drywall INC | Jovanni Rafael Navarro | — | (510) 693 4833 | Other | Oakland · Alameda County | — | — |
| Navis Construction INC | Kuljit Singh Khunkhun | — | (510) 862 5742 | Electricians | Hayward · Alameda County | — | — |
| Nayeb Construction | Mohammad Nayeb Qalandary | — | (510) 688 4240 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Nazca Painting | Nazca Painting | — | (650) 576 7385 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Nazgraphics | Rahimi Nazrat | — | (510) 962 1408 | Other | Hayward · Alameda County | — | — |
| Nba Hardwood Floors Co | Hai Quang Bui | — | (415) 971 0534 | Other | Oakland · Alameda County | — | — |
| Nc Construction INC | Chophel Ngedhon | — | (510) 415 2721 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Nc Flooring Group INC | Nelson Tayco Cruz | — | (510) 972 6290 | Other | Hayward · Alameda County | — | — |
| Nc Landscaping | Tri Nguyen | — | (510) 882 0079 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Nc Plastering-drywall INC | Jose Alfredo Elenes | — | (510) 677 8650 | Other | Oakland · Alameda County | — | — |
| Ncl Construction INC | Liyuan Liu | — | (415) 802 5004 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Ncs Moving Services DBA Ncs Prefabricated Equipment Installation | Peter Gill Rodriguez | — | (510) 923 1968 | Other | Oakland · Alameda County | — | — |
| Nd Teck | Nd Teck | — | (510) 688 5747 | Electricians | Hayward · Alameda County | — | — |