| Kevin Fulcher Remodeling | Kevin Fulcher Remodeling | — | (530) 870 2684 | GC, remodel, ADU | Colusa · Colusa County | — | — |
| Lake County Tree Service INC | Lake County Tree Service INC | — | (707) 349-5373 | Tree | Kelseyville · Colusa County | — | — |
| Lathum Pools | Lathum Pools | — | (530) 473-5319 | Pool | Williams · Colusa County | — | — |
| Lazaro Construction | Lazaro Construction | — | (530) 473-2718 | GC, remodel, ADU | Williams · Colusa County | — | — |
| Living Paint | Living Paint | — | (530) 434 8454 | Windows, patio, painters | Arbuckle · Colusa County | — | — |
| Local Roofer INC | Local Roofer INC | — | (877) 717-6633 | Other roofers | Colton · Colusa County | — | — |
| Luoma Construction | Charles Ray Luoma | — | (530) 632 0237 | GC, remodel, ADU | Colusa · Colusa County | — | — |
| Matt Simmons Construction INC | Matthew Ronald Simmons | mscinc99@gmail.com | (530) 521 0672 | GC, remodel, ADU | Colusa · Colusa County | — | — |
| Mccullough Excavating LLC | David Mitchell Mc Cullough | — | (530) 476 3100 | Other | Arbuckle · Colusa County | — | — |
| Mike Shahan Construction | Michael Allen Shahan | — | (530) 681 1191 | GC, remodel, ADU | Arbuckle · Colusa County | — | — |
| Mr Heating & Air Conditioning | Mr Heating & Air Conditioning | morris2275@hotmail.com | (530) 774 8302 | HVAC | Williams · Colusa County | — | — |
| Norcal Jc Electric | Juan Carlos Hernandez | — | (530) 701 9947 | Electricians | Colusa · Colusa County | — | — |
| North Valley Electric | North Valley Electric | anapbm@gmail.com | — | EV chargers | Colusa · Colusa County | — | — |
| Pacific Metal Buildings INC | Eusebio Cabrera Castillo | — | (530) 438 2777 | Other | Maxwell · Colusa County | — | — |
| Post Alarm Systems | Post Alarm Systems | — | (800) 654-7678 | Alarm and generators | Arcadia · Colusa County | — | — |
| Precision Roof Repair Azusa | Precision Roof Repair Azusa | — | (626) 613-5187 | Other roofers | Azusa · Colusa County | — | — |
| Price Floor Covering | Price Floor Covering | — | (530) 330 3148 | Other | Colusa · Colusa County | — | — |
| R R Construction | Raymond Jr Randle | — | (510) 917 5815 | GC, remodel, ADU | Arbuckle · Colusa County | — | — |
| Riordan Concrete Construction | Patrick Conan Riordan | — | (916) 803 2194 | Other | Colusa · Colusa County | — | — |
| Roger Hubbart Construction | Roger Dwayne Hubbart | — | (530) 844 0789 | GC, remodel, ADU | Colusa · Colusa County | — | — |
| S&j Construction Services Corp DBA Steve Knowles Construction | Jane Frances Smart | — | (707) 249 9918 | GC, remodel, ADU | Arbuckle · Colusa County | — | — |
| Salveson Electric | James William Salveson | — | (650) 743 8100 | Electricians | Stonyford · Colusa County | — | — |
| Sav•mor Foods | Sav•mor Foods | — | (530) 317-1368 | Alarm and generators | Colusa · Colusa County | — | — |
| Sei Window Coverings | Trevor Ray Smith | smithenterprise@live.com | (510) 375 3114 | Other | Colusa · Colusa County | — | — |
| Selover Paint & Body Auto Center | Selover Paint & Body Auto Center | — | (530) 458-4335 | Windows, patio, painters | Colusa · Colusa County | — | — |
| Selovers Landscaping | Selovers Landscaping | — | (530) 308 0146 | Windows, patio, painters | Arbuckle · Colusa County | — | — |
| Smg Communications INC | Zachary Steven Hoyer | — | (530) 619 9155 | Other | Colusa · Colusa County | — | — |
| Specialist Roofing & Repair | Specialist Roofing & Repair | — | (747) 307-5518 | Other roofers | Burbank · Colusa County | — | — |
| Stassi Carpentry | Stassi Carpentry | — | (530) 521 9008 | GC, remodel, ADU | Colusa · Colusa County | — | — |
| Steve's Painting | Steve's Painting | steves.painting@yahoo.com | (707) 489-2000 | Windows, patio, painters | Kelseyville · Colusa County | — | — |
| Steven E Langlois Company The | Steven Edward Langlois | — | (530) 308 2331 | GC, remodel, ADU | Arbuckle · Colusa County | — | — |
| Steven Knowles | Steven Knowles | — | (707) 249 9918 | Windows, patio, painters | Arbuckle · Colusa County | — | — |
| Stohlman Enterprises INC | Shannon Stohlman Smith | — | (530) 458 8332 | Electricians | Colusa · Colusa County | — | — |
| Stone Roofing Company INC | Stone Roofing Company INC | info@stoneroof.com | (800) 317-8663 | Other roofers | Azusa · Colusa County | — | — |
| Streamline Pipe Systems | Streamline Pipe Systems | — | (707) 249 4193 | Other | Williams · Colusa County | — | — |
| Sucevich Construction | Dana Lance Sucevich | — | (530) 867 1069 | GC, remodel, ADU | Arbuckle · Colusa County | — | — |
| Swimming Pool | Swimming Pool | — | (530) 458-2590 | Pool | Colusa · Colusa County | — | — |
| Systemic Tree Service Inc. | Systemic Tree Service Inc. | info@systemictreeservice.com | (707) 400-7724 | Tree | Redwood Valley · Colusa County | — | — |
| T & R Restore DBA T & R Riparian Restore | Ruben Jr Reynoso | — | (530) 682 9299 | Windows, patio, painters | Colusa · Colusa County | — | — |
| The Brick Bros INC | Thomas Bennedic Palomera Canedo | — | (530) 988 6828 | Other | Grimes · Colusa County | — | — |