| Action Plumbing Service | Thomas Walter Krauss | — | (510) 410 2729 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Ben Gooch | Ben Gooch | — | (530) 640 0347 | GC, remodel, ADU | Cedarville · Modoc County | — | — |
| Budmark Construction | Derrick Joshua Budmark | — | (530) 640 1030 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Bullet Construction | Kevin Scott Banwarth | — | (530) 260 0356 | GC, remodel, ADU | Adin · Modoc County | — | — |
| C Lindquist Construction | Charles Robert Lindquist | — | (775) 220 3132 | GC, remodel, ADU | Cedarville · Modoc County | — | — |
| C R Customs | C R Customs | — | (530) 708 0588 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Calturas Construction Homes LP | Isaac Joseph Sanders | — | (530) 640 3363 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Coast Wide Contractors | James Robert Hertel | — | (530) 640 2016 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Community Builders | Community Builders | — | (530) 640 1531 | GC, remodel, ADU | Cedarville · Modoc County | — | — |
| Dan Young Construction | Daniel Alan Young | — | (530) 708 7132 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| David A Schock Construction | David Aaron Schock | — | (530) 233 8256 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| David Young Construction | David Richard Young | — | (530) 708 0136 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Dewayne Urban Construction | Dewayne Dennis Urban | — | (916) 200 6795 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Dreamhome Construction & Inspections | Andrew Clyde Stocking | — | (831) 345 1775 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Dustin Titterington Construction | Dustin Kelly Titterington | — | (530) 233 0596 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Gardiner And Gardiner INC | Aaron Christopher Gardiner | — | (707) 685 2379 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Garlinghouse Construction | Billy Joe Garlinghouse | — | (707) 499 2835 | GC, remodel, ADU | Adin · Modoc County | — | — |
| Get-her-done Construction | John Grayson Jr Clevinger | — | (530) 640 1515 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Gs Construction | Solorio Gonzalo | — | (530) 708 7212 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Guy Williams General Contractor | Guy Williams General Contractor | — | (530) 233 5625 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Jason Diven Contracting | Diven Jason | — | (530) 640 2326 | GC, remodel, ADU | Lake City · Modoc County | — | — |
| Joe Lloyd General Contracting | Joseph David Lloyd | — | (530) 640 3960 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Landis Excavating | Landis Excavating | — | (530) 640 0374 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Larranaga Trucking INC | Fernand Jr Larranaga | — | (530) 233 3785 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Mc Kay Company | Kevin Mc Kay Thompson | — | (530) 299 3590 | GC, remodel, ADU | Adin · Modoc County | — | — |
| Mjm Contractors INC | Matthew John Mattos | mjmcontractors525@gmail.com | (530) 362 1133 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Ndg Construction | Nicholas Donn Grimme | — | (530) 708 2256 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Rollie L Gilliam Realty | Rollie L Gilliam Realty | — | (530) 233 6685 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Ross Cockrell Construction | Ross Thomas Cockrell | — | (530) 708 0117 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Sturdy Built On Site | Rodney Quinton Mast | — | (530) 640 0313 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Van Der Heyden Construction | Walter Edwin Van Der Heyden | — | (530) 640 3252 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Wisser Construction | Christian Bradley Wisser | — | (530) 708 1245 | GC, remodel, ADU | Alturas · Modoc County | — | — |