| A B Builders | A B Builders | — | (707) 490 2304 | GC, remodel, ADU | Hidden Valley Lake · Lake County | — | — |
| A R E Construction | Alvin Ricky Martinez | — | (707) 541 8121 | GC, remodel, ADU | Lakeport · Lake County | — | — |
| A-1 Construction | Thad James Henninger | — | (707) 350 1818 | GC, remodel, ADU | Lakeport · Lake County | — | — |
| Above Expectation | Above Expectation | — | (707) 779 2350 | GC, remodel, ADU | Kelseyville · Lake County | — | — |
| Absolute Action Construction | Derek George Soeth | — | (415) 497 1272 | GC, remodel, ADU | Lower Lake · Lake County | — | — |
| Aden Iv Construction | William Martin Aden | — | (707) 815 0215 | GC, remodel, ADU | Middletown · Lake County | — | — |
| Al's Home Enhancement | Al's Home Enhancement | — | (909) 279 2201 | GC, remodel, ADU | Kelseyville · Lake County | — | — |
| Alderbuilt Construction | Forest Eagelton Aldrich | — | (831) 238 2505 | GC, remodel, ADU | Kelseyville · Lake County | — | — |
| Alex Ciddio Woodcraft INC | Alexander Julian Ciddio | — | (707) 235 3924 | GC, remodel, ADU | Middletown · Lake County | — | — |
| All In One Construction | Scott Douglas Jerden | — | (707) 628 7326 | GC, remodel, ADU | Kelseyville · Lake County | — | — |
| All Seasons Construction | Keith Dennis Beeson | — | (707) 355 1718 | GC, remodel, ADU | Cobb · Lake County | — | — |
| Anthony Samuel Martinez DBA Asm Construction | Anthony Samuel Martinez | — | (707) 599 1603 | GC, remodel, ADU | Clearlake Oaks · Lake County | — | — |
| Barrios Construction | Timothy Ramon Barrios | — | (530) 718 9401 | GC, remodel, ADU | Lower Lake · Lake County | — | — |
| Benjamin Franklin Plumbing | Stanley Lewis Kincannon | — | (707) 263 1020 | GC, remodel, ADU | Lakeport · Lake County | — | — |
| Bierly Construction | Thomas Patrick Bierly | — | (925) 207 8351 | GC, remodel, ADU | Kelseyville · Lake County | — | — |
| Big And Little Construction | Larry David Ii Atkins | — | (707) 533 9960 | GC, remodel, ADU | Lower Lake · Lake County | — | — |
| Big Valley Builders | Big Valley Builders | — | (707) 245 6864 | GC, remodel, ADU | Lakeport · Lake County | — | — |
| Bob Sabatino Construction | Robert Joseph Sabatino | — | (707) 355 0145 | GC, remodel, ADU | Middletown · Lake County | — | — |
| Boggs Lane Woodworks | Boggs Lane Woodworks | boggslane@att.net | (707) 263 1262 | GC, remodel, ADU | Kelseyville · Lake County | — | — |
| Bowlin Construction INC | Charles Michael Bowlin | — | (707) 279 4028 | GC, remodel, ADU | Kelseyville · Lake County | — | — |
| Bravos Construction | George Dean Iii Bravos | — | (925) 212 5288 | GC, remodel, ADU | Clearlake · Lake County | — | — |
| Bridges Construction | Douglas Keith Bridges | — | (707) 263 4000 | GC, remodel, ADU | Kelseyville · Lake County | — | — |
| Brodnansky Construction | Darin Guy Brodnansky | — | (707) 263 4409 | GC, remodel, ADU | Lakeport · Lake County | — | — |
| C N R Construction | Chad Nelson Richardson | — | (805) 336 2700 | GC, remodel, ADU | Upper Lake · Lake County | — | — |
| Cani Contracting | John Frederick Jr Grothe | — | (707) 367 4855 | GC, remodel, ADU | Lakeport · Lake County | — | — |
| Carpenter's Standard Construction INC | Lars On-Alexander Tisell | — | (707) 533 9543 | GC, remodel, ADU | Lakeport · Lake County | — | — |
| Carter Construction | Thomas Lee Carter | — | (707) 272 3804 | GC, remodel, ADU | Upper Lake · Lake County | — | — |
| Charles Barron | Charles Barron | — | (707) 815 7537 | GC, remodel, ADU | Middletown · Lake County | — | — |
| Chavez Plumbing | Chavez Plumbing | — | (415) 859 6042 | GC, remodel, ADU | Clearlake · Lake County | — | — |
| Chelsea General Contractors INC | Jesus Osmany Garcia | info@chelseageneralcontractors.com | (707) 367 2169 | GC, remodel, ADU | Upper Lake · Lake County | — | — |
| Chris Moe | Chris Moe | — | (707) 349 3534 | GC, remodel, ADU | Kelseyville · Lake County | — | — |
| Cl Construction | Chris Clovis Legue | — | (510) 773 1740 | GC, remodel, ADU | Lucerne · Lake County | — | — |
| Classic Home Improvements | Classic Home Improvements | — | (858) 224-7373 | GC, remodel, ADU | Escondido · Lake County | — | — |
| Cm Builders LLC | Pina Cesar Chavez | — | (415) 859 6042 | GC, remodel, ADU | Clearlake · Lake County | — | — |
| Colemans Custom Construction | Toby James Coleman | — | (707) 349 4070 | GC, remodel, ADU | Kelseyville · Lake County | — | — |
| Colin Construction LLC | Oscar Ruben Colin | — | (707) 264 9406 | GC, remodel, ADU | Lakeport · Lake County | — | — |
| Concha Construction | Raul Vega Concha | raul@concha-construction.com | (707) 350 5937 | GC, remodel, ADU | Kelseyville · Lake County | — | — |
| Cooper Construction | Ralph L Cooper | — | (707) 263 1932 | GC, remodel, ADU | Lakeport · Lake County | — | — |
| Cornerstone Cabinets | Cornerstone Cabinets | — | (760) 937 0826 | GC, remodel, ADU | Lakeport · Lake County | — | — |
| Cory Benjamen Moore | Cory Benjamen Moore | — | (707) 721 7984 | GC, remodel, ADU | Clear Lake · Lake County | — | — |