| New Age Heating & Cooling | Saldivar Jeffrey | — | (707) 654 7676 | HVAC | Fairfield · Solano County | — | — |
| New Look Landscape INC | Deodato Joao Pereira | — | (707) 438 2930 | Windows, patio, painters | Suisun City · Solano County | — | — |
| New Lumber Construction | Gaxiola Jaime | — | (415) 524 5316 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| New Phase Paving | New Phase Paving | — | (707) 718 8323 | Other | Vacaville · Solano County | — | — |
| New Walls Construction | Jose Antonio Gutierrez Mendez | — | (415) 837 3401 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Newcap Roofing INC | Miguel Angel Perez Saldivar | newcaproofing34@gmail.com | (707) 712 1968 | Other roofers | Vallejo · Solano County | — | — |
| Newell Services | John Hector Newell | — | (707) 224 5731 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Newkirk Construction Company INC | Robert William Newkirk | — | (707) 426 6632 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Newpane.com | Andrew John King | — | (707) 678 9970 | Windows, patio, painters | Dixon · Solano County | — | — |
| Newteck Solutions INC | Sheila Joleen Perkins | service@newtecksolutions.com | (707) 470-5525 | Other | Suisun City · Solano County | — | — |
| Nextgen Professional Builders INC | Erik Ricardo Reyes | — | (415) 235 7992 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Nichols Contracting INC | Kenneth Eric Nichols | — | (707) 718 1181 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Nick Hammer General Builder | Nick Hammer General Builder | — | (650) 921 3719 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Nick Wooderson | Nick Wooderson | — | (707) 246 0911 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Nielson Mechanical INC | Matthew James Nielson | — | (707) 437 5020 | HVAC | Fairfield · Solano County | — | — |
| Nieto Landscape | Nieto Landscape | — | (707) 631 1352 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Niles Services | Richard Antonio Niles | — | (707) 333 1730 | Electricians | Vallejo · Solano County | — | — |
| Nisus Construction LLC | Cedrick Joel Gousse | — | (347) 901 3206 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Nomellini Construction Co | Drew James Nomellini | — | (415) 404 1732 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Nor-cal Concrete Company | Joseph Andrew Ardave | joshbarber04@gmail.com | (707) 425 6144 | Other | Suisun · Solano County | — | — |
| Nor-pacific Heating And Air | Nor-pacific Heating And Air | — | (707) 410 6944 | HVAC | Fairfield · Solano County | — | — |
| Norby Remodeling Construction | Norberto Salvador Aguilera | — | (707) 333 2096 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Norcal Bb Construction | Bryan Candelaria Bautista | — | (415) 699 1030 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Norcal Property Restoration | Jarrod Duane Jones | — | (707) 688 5419 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Norris Steel | Christopher Bryant Norris | — | (707) 297 0113 | Other | Suisun City · Solano County | — | — |
| North American Power & Controls INC | Thomas William Olson | — | (707) 552 7318 | Electricians | Benicia · Solano County | — | — |
| North Bay Air Systems INC | Ronald Manuel Ron | — | (707) 747 0422 | HVAC | Fairfield · Solano County | — | — |
| North Bay Custom Interiors INC | David Eugene Sparks | — | (707) 486 0465 | Other | Dixon · Solano County | — | — |
| North Bay Landscape | Pulido Jose Morales | info@northbaylandscape.com | (925) 250 1603 | Windows, patio, painters | Fairfield · Solano County | — | — |
| North Bay Plumbing INC | Ben Molnar | — | (707) 422 0881 | HVAC | Fairfield · Solano County | — | — |
| North Bay Water Services INC | Richard Allen Sr Adams | — | (707) 745 8823 | Pool | Fairfield · Solano County | — | — |
| North Cal Paving INC | Jacob Dean Najar | — | (707) 628 6524 | Other | Vacaville · Solano County | — | — |
| North County Mobile Screen | North County Mobile Screen | — | (760) 473-8536 | Windows, patio, painters | Encinitas · Solano County | — | — |
| North Valley Construction | Kevin Lansing Hedlund | — | (707) 454 9634 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| North Wood Construction INC | Manzanarez Salome Raul | — | (510) 706 9944 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Northern California Electric | Yader Angel Duron | — | (707) 359 8732 | Electricians | Vacaville · Solano County | — | — |
| Northern California Roofing Co | Gregory Thomas Lynn | — | (707) 447 5655 | Other roofers | Vacaville · Solano County | — | — |
| Northridge Construction | Michael Kenneth Harais | info@northridgeconstruction.com | (707) 334 1209 | GC, remodel, ADU | Suisun City · Solano County | — | — |
| Northstar Painting INC | Jose Manuel Espinosa Narvaez | — | (707) 724 9852 | Windows, patio, painters | Fairfield · Solano County | — | — |
| Novak Electric | Steve Charles Novak | — | (707) 660 1808 | Electricians | Vacaville · Solano County | — | — |