| Wheeling Cabinet Installation | Wheeling Cabinet Installation | — | (530) 949 4935 | Other | Anderson · Shasta County | — | — |
| White Floorcovering | White Floorcovering | — | (530) 646 7823 | Other | Redding · Shasta County | — | — |
| Whitewaters Construction INC | James Mc Culloch Dixon | — | (530) 945 8893 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Whole Note Landscape | Whole Note Landscape | — | (530) 356 0827 | Windows, patio, painters | Redding · Shasta County | — | — |
| Wilcox Construction | Richard Clayton Wilcox | bids@wilcoxconstruction.com | (530) 524 3372 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Wild West Reforesters INC | Randy Dean Mcdaniel | — | (530) 347 9497 | Tree | Cottonwood · Shasta County | — | — |
| Wilderness Construction | Robert William Myers | — | (530) 335 2237 | GC, remodel, ADU | Burney · Shasta County | — | — |
| Wilgus Fire Control INC | Scott Craig Nelson | — | (530) 241 2465 | Other | Redding · Shasta County | — | — |
| Will Gordon Masonry | Will Gordon Masonry | willgordon@willgordonmasonry.com | (530) 356 7846 | Other | Redding · Shasta County | — | — |
| William D Lancaster Construction | William Douglas Lancaster | — | (530) 339 6696 | Other | Redding · Shasta County | — | — |
| William Grills Construction | William Dale Grills | — | (530) 949 5716 | GC, remodel, ADU | Shasta Lake · Shasta County | — | — |
| William R Ellis | William R Ellis | — | (530) 472 3245 | GC, remodel, ADU | Whitmore · Shasta County | — | — |
| Williamson Painting | Williamson Painting | — | (530) 949 7470 | Windows, patio, painters | Redding · Shasta County | — | — |
| Wilson & Wilson Installations | Larry Neale Wilson | — | (530) 613 0684 | Other | Cottonwood · Shasta County | — | — |
| Winkler's Sprinklers | Winkler's Sprinklers | — | (530) 209 7862 | Windows, patio, painters | Redding · Shasta County | — | — |
| Wintter Construction | William Jacob Wintter | — | (951) 367 5299 | GC, remodel, ADU | Ono · Shasta County | — | — |
| Wonderland Signs INC | Thomas Scott Aldama | sales@wonderlandsigns.com | (530) 222 3394 | Other | Redding · Shasta County | — | — |
| Wood & Son Cabinet Co | Stephen Leroy Wood | — | (530) 407 0785 | Other | Anderson · Shasta County | — | — |
| Woodcuts | Wayne Talmage Brown | — | (530) 524 3583 | Other | Redding · Shasta County | — | — |
| Woods Tree Service LLC | Jason Luther Woods | — | (334) 400 6923 | Tree | Shingletown · Shasta County | — | — |
| World Telecom & Surveillance INC | Ryan Michael Belcastro | — | (530) 223 9753 | Other | Redding · Shasta County | — | — |
| Wright Builders | Wright Builders | — | (530) 510 6585 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Wright Electric | Jeremy Robert Wright | — | (530) 227 8553 | Electricians | Millville · Shasta County | — | — |
| Wright Way Company | Robert Maurice Wright | — | (515) 238 2518 | Electricians | Shasta Lake · Shasta County | — | — |
| X3 Steel Construction | James Matthew Morrison | — | (425) 229 4509 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Young General Engineering | Ryan Donald Young | — | (707) 599 9921 | Other | Cottonwood · Shasta County | — | — |
| Youngman Electric | Barry Gene Youngman | — | (530) 351 5105 | Electricians | Redding · Shasta County | — | — |
| Yucaipa Kitchen & Bathroom Designs & Remodeling | Jerald Reese Jr Huddleston | — | (909) 435 6465 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Z And H Associates INC | Robert Matthew Zaech | info@kjrees-construction.co.uk | (530) 223 2988 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Zachary Cole Pine | Zachary Cole Pine | — | (415) 217 9544 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Zamora's Concrete Concepts | Zamora's Concrete Concepts | — | (530) 736 6762 | Other | Redding · Shasta County | — | — |
| Zane Finley | Zane Finley | — | (530) 222 2277 | Pool | Cottonwood · Shasta County | — | — |
| Zeis Construction | Zachary David Zeis | — | (530) 510 7916 | Other | Redding · Shasta County | — | — |
| Zezee Roofing Co | Edgar William Schanuth | zezee2@att.net | (530) 227 5076 | Other roofers | Redding · Shasta County | — | — |
| Zimmer Construction | Lance Wade Zimmer | — | (530) 244 4395 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Zinco Builders INC | Edward Leon Knight | — | (530) 209 0402 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Zwetsloot Construction | David Andrew Zwetsloot | — | (707) 266 8236 | Other | Redding · Shasta County | — | — |