| CONCRETE IMPRESSIONS INC | 2897104 | SPANAWAY | 2 |
| CONCRETE INGENUITY INC | 3085992 | ELLENSBURG | 3 |
| CONCRETE NORTHWEST INC | 3903605 | GRAHAM | 1 |
| CONCRETE PLUS | 4043641 | SPOKANE | 1 |
| CONCRETE PUMPING OF SPOKANE INC | 3270030 | SPOKANE VLY | 1 |
| CONCRETE RECYCLERS INC | 1892059 | TUMWATER | 3 |
| CONCRETE RESTORATION INC | 1750115 | SEATTLE | 6 |
| CONCRETE SERVICES INC | 1900800 | PUYALLUP | 20 |
| CONCRETE SPECIALTY SUPPLY INC | 2430656 | BATTLE GROUND | 3 |
| CONCRETE STRUCTURES NW LLC | 2569745 | MARYSVILLE | 2 |
| CONCRETE TECHNOLOGY CORPORATION | 2991026 | TACOMA | 1 |
| CONCRETE WEST INCORPORATED | 2457193 | DAVENPORT | 5 |
| CONCRETEMAN INC | 1955382 | GRAHAM | 3 |
| CONDE CONCRETE INC | 2350032 | PUYALLUP | 1 |
| CONDON CONSTRUCTION LLC | 2901247 | SPOKANE | 4 |
| CONDOR EXPRESS LLC | 3304133 | WASHOUGAL | 21 |
| CONDRON HOMES LLC | 1806325 | SPOKANE | 1 |
| CONEX MATERIALS INC | 2174584 | WASHOUGAL | 1 |
| CONEX SAND & GRAVEL | 1897749 | VANCOUVER | 1 |
| CONFEDERATED CONSTRUCTION COMPANY LLC | 3347473 | OAKVILLE | 4 |
| CONFEDERATED TRIBES OF THE CHEHALIS RESERVATION | 2474310 | ROCHESTER | 7 |
| CONFLUENCE CELLARS LLC | 2351366 | CLARKSTON | 1 |
| CONFLUENCE TREE CARE LLC | 3823007 | WASHOUGAL | 6 |
| CONFRAME CONSTRUCTION LLC | 4341533 | BATTLE GROUND | 2 |
| CONG HAN NGUYEN | 4556491 | SEATTLE | 1 |
| CONGDON ORCHARDS INC | 1093776 | YAKIMA | 7 |
| CONGREGATION OF MARY IMMACULATE QUEEN | 573040 | SPOKANE | 48 |
| CONIFER ELECTRIC INC | 3789256 | NEWMAN LAKE | 4 |
| CONIFER SPECIALTIES INC | 2331197 | WOODINVILLE | 1 |
| CONLEY ENTERPRISES | 517675 | SPOKANE | 2 |
| CONLEY HOMES AND DESIGN LLC | 3661286 | SNOHOMISH | 1 |
| CONLEY INC | 4413240 | ASHFORD | 1 |
| CONNECT 4 TOWING | 3366305 | SEATTLE | 1 |
| CONNECT BROKERAGE INC | 3897142 | BELLEVUE | 0 |
| CONNECT U S LLC | 2934388 | DUVALL | 6 |
| CONNECTING GREATMINDS LLC | 3790265 | TUKWILA | 2 |
| CONNECTION | 1917801 | MAPLE VALLEY | 1 |
| CONNECTIONS SPECIALISTS INC | 3136560 | SPOKANE | 0 |
| CONNELL GRANGE SUPPLY | 1982298 | CONNELL | 2 |
| CONNELL OIL INC | 472546 | PASCO | 133 |
| CONNELL SAND & GRAVEL INC | 1893807 | CONNELL | 27 |
| CONNELLY COMPANY INC | 1297573 | CHEWELAH | 3 |
| CONNELLY FREIGHT & PARCEL INC | 1449081 | PORT ORCHARD | 1 |
| CONNER CONSTRUCTION COMPANY | 904701 | KENNEWICK | 4 |
| CONNIE CLOUSE | 2171606 | YAKIMA | 3 |
| CONNIE HUMPHREY | 1930692 | MALOTT | 2 |
| CONNIE JO SPONHEIM | 3426609 | KENMORE | 1 |
| CONNIE'S TRUCKING LLC | 4052960 | QUINCY | 3 |
| CONNOR JAMES AHMANN | 3726778 | RANDLE | 1 |
| CONNOR KINNEY | 3529109 | CAMANO ISLAND | 1 |
| CONNOR TREAT | 2351786 | ELLENSBURG | 2 |
| CONNORS DISTRIBUTING | 2880147 | ORONDO | 1 |
| CONNORS HAULING SERVICE LLC | 4303428 | VANCOUVER | 2 |
| CONOVER INSURANCE INC | 1974226 | YAKIMA | 1 |
| CONQUEST PRECAST LLC | 3359965 | BATTLE GROUND | 2 |
| CONRAD AARON HARDER | 3958322 | SPOKANE VALLEY | 2 |
| CONRAD AND SONS CONSTRUCTION LLC | 3324974 | EPHRATA | 1 |
| CONRAD C ELLEDGE | 1897185 | MONROE | 1 |
| CONRAD CHARLES CLEMENTSON | 1932649 | CHELAN | 1 |
| CONRAD GARZA | 2236403 | OTHELLO | 0 |
| CONRAD KINSEY | 2529071 | SUNNYSIDE | 4 |
| CONRAD KRISIK | 702497 | COLVILLE | 4 |
| CONRAD MOEN | 334904 | YAKIMA | 1 |
| CONRAD RUSSELL EXCAVTION LLC | 1891533 | PROSSER | 4 |
| CONRAD SERVICES LLC | 2421415 | ROCHESTER | 1 |
| CONRADO GARZA | 517665 | OTHELLO | 10 |
| CONROY HOMES LLC | 1843774 | MOSES LAKE | 1 |
| CONSEAL CONTAINERS LLC | 569762 | SPOKANE | 3 |
| CONSERVATION TREE CARE | 3088206 | SEATTLE | 3 |
| CONSIGLIERI RELOCATION PLLC | 3758054 | BOTHELL | 1 |
| CONSOLIDATED DISPOSAL SERVICE INC | 549398 | EPHRATA | 3 |
| CONSOLIDATED FREIGHT LINES LLC | 3979338 | VANCOUVER | 3 |
| CONSOLIDATED HOMES INC | 942936 | LONGVIEW | 2 |
| CONSOLIDATED LANDSCAPE MAINTENANCE INC | 1970566 | MARYSVILLE | 1 |
| CONSOLIDATED OUTDOOR SERVICES INC | 4277803 | STANWOOD | 1 |
| CONSOLIDATED PRESS LLC | 2198764 | SEATTLE | 2 |
| CONSOLIDATED SHIPPERS INC | 2212711 | BAINBRIDGE ISLAND | 0 |
| CONSTANCE LAND SERVICES LLC | 4485248 | SEQUIM | 3 |
| CONSTANCE MACHINE | 2336148 | EVERETT | 1 |
| CONSTANTA LLC | 4553594 | ROCKFORD | 1 |
| CONSTANTIN IONESCU | 1990741 | LYNNWOOD | 1 |
| CONSTANTIN ROSOIU | 4488912 | BELLEVUE | 1 |
| CONSTANTINO PAREJA GONZALEZ | 3587171 | BOTHELL | 3 |
| CONSTRUCT COMPANY LLC | 1907644 | SUMNER | 7 |
| CONSTRUCT INC | 3401252 | TUMWATER | 3 |
| CONSTRUCTION AHEAD INC | 1725969 | KENNEWICK | 67 |
| CONSTRUCTION ASSOCIATES OF SPOKANE INC | 3234347 | SPOKANE | 2 |
| CONSTRUCTION BOYS LLC | 4523805 | DES MOINES | 1 |
| CONSTRUCTION BY CHAMPION LLC | 2434626 | BELLINGHAM | 2 |
| CONSTRUCTION CONTAINER SERVICES LLC | 1925401 | SNOHOMISH | 1 |
| CONSTRUCTION EQUIPMENT SERVICES | 3842077 | VASHON | 1 |
| CONSTRUCTION GROUP INTERNATIONAL LLC | 2919725 | WOODINVILLE | 6 |
| CONSTRUCTION PARTS LLC | 2473383 | GRAHAM | 1 |
| CONSTRUCTION PRODUCTS SUPPLY OF WASHINGTON | 2828710 | SPOKANE | 1 |
| CONSTRUCTION REPAIR SERVICES INC | 2210467 | BATTLE GROUND | 2 |
| CONSTRUCTION SERVICE ASSOCIATES INC | 1173572 | MALAGA | 4 |
| CONSTRUCTION SITE RESOURCES INC | 3290006 | LAKE STEVENS | 2 |
| CONSTRUCTION SITE SERVICES | 2527647 | SEATTLE | 1 |
| CONSTRUCTION SUPPLY COMPANY | 1898171 | BELLINGHAM | 1 |
| CONSTRUCTION UNLIMITED INC | 1916368 | MOUNT VERNON | 1 |