| Joiner Construction INC | Craig Willis Joiner | — | (530) 294 5318 | Other | Lookout · Modoc County | — | — |
| Lance Linker 49 Construction | Lance Burge Linker | — | (530) 233 0559 | Other | Cedarville · 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 | — | — |
| Lee Conner Well Drilling A Partnership | Lee Harvey Conner | — | (530) 640 0119 | Other | Cedarville · Modoc County | — | — |
| Mc Kay Company | Kevin Mc Kay Thompson | — | (530) 299 3590 | GC, remodel, ADU | Adin · Modoc County | — | — |
| Mccombs Electric INC | Dane Andrew Mccombs | — | (530) 640 0067 | Electricians | Alturas · Modoc County | — | — |
| Mission Roofing Co | Mission Roofing Co | — | (442) 257-1480 | Other roofers | Escondido · Modoc County | — | — |
| Mjm Contractors INC | Matthew John Mattos | mjmcontractors525@gmail.com | (530) 362 1133 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Moat Termite & Pest Control | Moat Termite & Pest Control | — | (760) 978-5999 | Pest, tile roofs | Carlsbad · Modoc County | — | — |
| Modoc County Building Inspector | Modoc County Building Inspector | — | (530) 233-6435 | Inspectors | Alturas · Modoc County | — | — |
| Mr Green Thumb | Mr Green Thumb | customer-care@mrgreenthumb.com | (530) 708 1868 | Windows, patio, painters | Alturas · Modoc County | — | — |
| Ndg Construction | Nicholas Donn Grimme | — | (530) 708 2256 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Rene Larranaga | Rene Larranaga | — | (530) 233 5050 | Other | Alturas · Modoc County | — | — |
| Rollie L Gilliam Realty | Rollie L Gilliam Realty | — | (530) 233 6685 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Roof Pros Roofing & General Construction | Roof Pros Roofing & General Construction | — | (833) 426-0826 | Other roofers | Escondido · Modoc County | — | — |
| Roof Rite | Roof Rite | — | (760) 295-6129 | Other roofers | Vista · Modoc County | — | — |
| Ross Cockrell Construction | Ross Thomas Cockrell | — | (530) 708 0117 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Ryan Holman's Painting INC | Ryan Thearle Holman | — | (530) 708 1254 | Windows, patio, painters | Alturas · Modoc County | — | — |
| San Marcos Roof Repair And Adu's | San Marcos Roof Repair And Adu's | — | (619) 627-0399 | Other roofers | San Marcos · Modoc County | — | — |
| Sturdy Built On Site | Rodney Quinton Mast | — | (530) 640 0313 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| The Oak Mill | The Oak Mill | — | (530) 233 6748 | Other | Alturas · Modoc County | — | — |
| Thomas Lee Balcer DBA Caybal Electric | Thomas Lee Balcer | — | (408) 640 1185 | Electricians | Cedarville · Modoc County | — | — |
| Van Der Heyden Construction | Walter Edwin Van Der Heyden | — | (530) 640 3252 | GC, remodel, ADU | Alturas · Modoc County | — | — |
| Walker's Home & Commercial Inspections | Walker's Home & Commercial Inspections | windwalker1313@gmail.com | (530) 784-3042 | Inspectors | Lewiston · Modoc County | — | — |
| Wayne C Bethel Refrigeration | Wayne C Bethel Refrigeration | — | (530) 233 4647 | HVAC | Alturas · Modoc County | — | — |
| White Bear Construction INC | Laine Melvin Hoy | ahoywhitebear@outlook.com | (530) 233 4875 | Other | Alturas · Modoc County | — | — |
| Will Battram Heating And Air Conditioning | William Joseph Battram | — | (530) 640 3422 | HVAC | Alturas · Modoc County | — | — |
| Wisser Construction | Christian Bradley Wisser | — | (530) 708 1245 | GC, remodel, ADU | Alturas · Modoc County | — | — |