| North Bay Elevator | Johnathon Kyle Earnest | sales@northbayelevator.com | (707) 583 3100 | Other | Santa Rosa · Sonoma County | — | — |
| North Bay Excavation INC | Pierce Thomas Day | — | (707) 231 6556 | Other | Valley Ford · Sonoma County | — | — |
| North Bay Farm And Garden | Joshua Joseph Lyon | — | (707) 799 6277 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| North Bay Fence Builder | North Bay Fence Builder | — | (707) 779 2573 | Other | Petaluma · Sonoma County | — | — |
| North Bay Flooring INC | Albor Miguel Ruiz | — | (707) 544 3883 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| North Bay Grading And Paving | Michael Dean Peterson | — | (707) 333 7540 | Other | Petaluma · Sonoma County | — | — |
| North Bay Gunite INC | Sergio Albor | — | (707) 396 7526 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| North Bay Landscape Management INC | Susan M Pottorff | — | (707) 762 3850 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| North Bay Metal Fabrication | Justin Earl Gravelle | — | (707) 540 5289 | Other | Santa Rosa · Sonoma County | — | — |
| North Bay Monument Co DBA Kyle D Galeazzi | Kyle David Galeazzi | — | (707) 586 0480 | GC, remodel, ADU | Rohnert Park · Sonoma County | — | — |
| North Bay Overhead Doors INC | Kimberly Ann Berlin | — | (415) 499 0602 | Other | Petaluma · Sonoma County | — | — |
| North Bay Pacific Insulators LLC | Daniel Andrew Iii Low | — | (916) 631 6572 | Other | Santa Rosa · Sonoma County | — | — |
| North Bay Platinum Plumbing INC | Michael Walter Camp | — | (707) 548 7128 | Other | Santa Rosa · Sonoma County | — | — |
| North Bay Plumbing & Rooter Service | Jeremy Gavin Gardea | — | (707) 542 7040 | Other | Santa Rosa · Sonoma County | — | — |
| North Bay Premium Painting LLC | Ponce Rojas Javier | — | (707) 536 8558 | Windows, patio, painters | Rohnert Park · Sonoma County | — | — |
| North Bay Pressure Washing INC DBA Allstarz Pumping & Engineering | Karl Frederick Meyers | — | (707) 777 7867 | Other | Santa Rosa · Sonoma County | — | — |
| North Bay Rehabilitation Services INC | Erik Lewis Sherley | — | (707) 585 1991 | Windows, patio, painters | Rohnert Park · Sonoma County | — | — |
| North Bay Sunspace INC | Michael Earl Bertnick | info@ndiscovered.com | (707) 769 8553 | GC, remodel, ADU | Cotati · Sonoma County | — | — |
| North Cal Builders | North Cal Builders | — | (415) 847 1117 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| North Cal Concrete Construction | De Dios Ruben Sandoval | — | (707) 775 5788 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| North Coast Concrete INC | Timothy Stephen Watry | — | (707) 665 7349 | Other | Santa Rosa · Sonoma County | — | — |
| North Coast Contracting LLC | Vincent Russell Lopez-Avendano | contact@sansoxygen.com | (707) 328 6052 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| North Coast Custom Builder | North Coast Custom Builder | — | (707) 338 6428 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| North Coast Electrical Services | Michael Leonard Potts | — | (707) 685 3044 | Electricians | Forestville · Sonoma County | — | — |
| North Coast Steel INC | John Douglas Coleman | — | (707) 837 0225 | Other | Windsor · Sonoma County | — | — |
| North Coast Tile & Stone INC | Thomas Robert Bodell | — | (707) 586 2064 | Other | Santa Rosa · Sonoma County | — | — |
| North Coast Waterproofing INC | Clifford Edward Matthews | — | (707) 935 1721 | Windows, patio, painters | Sonoma · Sonoma County | — | — |
| North Coast Waterworks INC | Jarrad William Fraser | — | (707) 578 3411 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| North Counties Drywall INC | Diane Louise Merlo | — | (707) 996 0198 | GC, remodel, ADU | Sonoma · Sonoma County | — | — |
| North End Plumbing Heating & Air | Nicholas Angelo Burrage | — | (707) 889 8525 | HVAC | Santa Rosa · Sonoma County | — | — |
| North Hills Construction | Timothy Steven Finch | — | (707) 568 6440 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| North Sky Fire Protection | North Sky Fire Protection | pacheco2874.4@gmail.com | (415) 574 8931 | Other | Penngrove · Sonoma County | — | — |
| North Sun Construction | David Joseph Pawek | — | (707) 321 4110 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| North West Plumbing | North West Plumbing | — | (707) 521 9172 | Other | Santa Rosa · Sonoma County | — | — |
| Northbay Craftsmen INC | John Richard Ryan Walsh | info@northbaycraftsmen.com | (415) 307 3602 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Northbay Diamon - Fusion | Northbay Diamon - Fusion | — | (707) 542 0102 | Other | Santa Rosa · Sonoma County | — | — |
| Northbay Garage Doors | Northbay Garage Doors | — | (707) 795 3667 | Other | Rohnert Park · Sonoma County | — | — |
| Northbay Mechanical INC | Dennis Arthur Ferl | — | (707) 778 0489 | HVAC | Petaluma · Sonoma County | — | — |
| Northbay Roofing & Gutters INC | Damien David Cesena | info@northbayrg.com | (707) 591 9288 | Other roofers | Santa Rosa · Sonoma County | — | — |
| Northbay Technology Company | Ramiro J Acevedo | — | (707) 304 5118 | Other | Healdsburg · Sonoma County | — | — |