| 3 - D Construction | Kent Allen Douglas | — | (650) 464 7961 | GC, remodel, ADU | Lake Almanor · Lassen County | — | — |
| Abbott Construction | Renn Opinion Abbott | — | (530) 310 3967 | GC, remodel, ADU | Susanville · Lassen County | — | — |
| Advanced Comfort Control INC | William Allen Harkness | office@advancedcomfortcontrol.com | (530) 254 6571 | HVAC | Susanville · Lassen County | — | — |
| All Season Heating & Air | James David Young | — | (530) 257 7202 | HVAC | Janesville · Lassen County | — | — |
| Almanors Preferred Builder | Almanors Preferred Builder | — | (530) 375 0658 | GC, remodel, ADU | Westwood · Lassen County | — | — |
| Alpine Property Inspections | Alpine Property Inspections | info@alpinepropertypreservation.com | (530) 249-0592 | Inspectors | Susanville · Lassen County | — | — |
| An Construction | An Construction | — | (818) 458-7671 | GC, remodel, ADU | Chatsworth · Lassen County | — | — |
| B & J Renovation | B & J Renovation | — | (530) 774 4276 | Electricians | Lake Almanor · Lassen County | — | — |
| Beckett Drilling & Pump Service | Robert Alvin Jr Beckett | — | (530) 310 3940 | Other | Herlong · Lassen County | — | — |
| Beckman Construction | William Edward Beckman | — | (530) 260 3370 | GC, remodel, ADU | Westwood · Lassen County | — | — |
| C E Dore Construction | Christopher Emile Dore | — | (530) 258 1555 | GC, remodel, ADU | Westwood · Lassen County | — | — |
| Chris Layne Construction | Christopher Lee Layne | — | (530) 310 4009 | GC, remodel, ADU | Doyle · Lassen County | — | — |
| Clement Construction | William Karl Clement | — | (530) 375 7033 | GC, remodel, ADU | Westwood · Lassen County | — | — |
| Colbert And Son | Colbert And Son | — | (530) 253 2181 | GC, remodel, ADU | Janesville · Lassen County | — | — |
| Color's New To You With Karpers Painting | Carl Joseph Karper | — | (530) 310 4973 | Windows, patio, painters | Susanville · Lassen County | — | — |
| Concrete Unlimited | Concrete Unlimited | interested@domainmarket.com | (530) 249 2100 | Other | Susanville · Lassen County | — | — |
| Converse Plumbing INC | Derry Dewane Converse | — | (530) 257 6957 | Other | Susanville · Lassen County | — | — |
| Cornerstone Building INC | Joshua Michael Shihadeh | — | (530) 249 9094 | GC, remodel, ADU | Janesville · Lassen County | — | — |
| Crazy J's Concrete INC | Juan Jose Jimenez | crazyjsconcrete@gmail.com | (530) 257 9681 | GC, remodel, ADU | Susanville · Lassen County | — | — |
| Creative Landscapes | Creative Landscapes | — | (530) 258 6909 | Windows, patio, painters | Lake Almanor · Lassen County | — | — |
| Cutting Edge Tile | Cutting Edge Tile | interested@domainmarket.com | (707) 616 8208 | Other | Janesville · Lassen County | — | — |
| Dalina Construction | Dalina Construction | — | (818) 266-9390 | GC, remodel, ADU | Chatsworth · Lassen County | — | — |
| Darren Kirack Construction Company | Darren Shayne Kirack | — | (530) 251 0282 | GC, remodel, ADU | Susanville · Lassen County | — | — |
| Das Property Management | Das Property Management | — | (760) 434-3242 | Property managers | Carlsbad · Lassen County | — | — |
| Dcb Building Structures | Dcb Building Structures | — | (530) 375 7400 | GC, remodel, ADU | Westwood · Lassen County | — | — |
| Delucchi Construction | Nicholas William Delucchi | — | (530) 816 0240 | GC, remodel, ADU | Lake Almanor · Lassen County | — | — |
| Delucchi Construction | Trevor William Delucchi | — | (530) 816 0240 | GC, remodel, ADU | Lake Almanor · Lassen County | — | — |
| Diamond Brother's Construction LLC | Tyler Steven Diamond | — | (530) 260 8834 | GC, remodel, ADU | Susanville · Lassen County | — | — |
| Duerksen Electric | Eric Leon Dell Duerksen | — | (530) 310 0104 | Electricians | Susanville · Lassen County | — | — |
| Durkin Home Construction | David William Durkin | — | (530) 519 2683 | GC, remodel, ADU | Lake Almanor · Lassen County | — | — |
| Dutra Construction | Robert Charles Dutra | — | (530) 310 2169 | GC, remodel, ADU | Susanville · Lassen County | — | — |
| Eagle Lake Construction | John David Le Roy | — | (530) 825 3351 | GC, remodel, ADU | Susanville · Lassen County | — | — |
| Eagle Lake Floors | Eagle Lake Floors | — | (530) 717 9901 | Other | Susanville · Lassen County | — | — |
| Eagle Lake Plumbing | Eagle Lake Plumbing | — | (530) 260 0064 | Other | Susanville · Lassen County | — | — |
| Eagle Roofing | Eagle Roofing | — | (909) 822-6000 | Other roofers | Susanville · Lassen County | — | — |
| Elite Construction | Michael Andrew Shively | info@eliteconstruction.ca | (530) 251 7134 | GC, remodel, ADU | Janesville · Lassen County | — | — |
| Energy Solutions Heating Air & Solar INC | Monte Paul Stelzriede | — | (530) 816 1600 | HVAC | Lake Almanor · Lassen County | — | — |
| Estabrook Construction | Luke Ronald Estabrook | — | (775) 997 9336 | GC, remodel, ADU | Standish · Lassen County | — | — |
| Estabrook Construction | Zachary William Estabrook | — | (775) 997 5928 | GC, remodel, ADU | Standish · Lassen County | — | — |
| Eugene Wilder Construction | Eugene Howard Wilder | — | (530) 260 3048 | GC, remodel, ADU | Susanville · Lassen County | — | — |