Plumbing contractors in Washington
2,266 active plumbing contractors are registered with Washington L&I. 4,450 registrations are on record in all, including expired and other statuses.
200 of the active plumbing contractors registered in Washington are based in other states.
All 4,450 registrations on record
Businesses by registered name and license number. Show only the 2,266 active registrations.
- CAMEO ENTERPRISESEXPIRED
Snohomish, WA · License CAMEOE*780NB · First registered 2022
- CAMGENUITY LLCEXPIRED
Bellevue, WA · License CAMGEL*786NR · First registered 2022
- CAMP'S PLUMBING LLCEXPIRED
The Dalles, OR · License CAMPSPL938Q9 · First registered 2007
- CANNON MECHANICAL LLCEXPIRED
Bothell, WA · License CANNOML760NR · First registered 2024
- CANNON MECHANICAL LLCEXPIRED
Bothell, WA · License CANNOML784PC · First registered 2022
- CAP CONSTRUCTION LLCSUSPENDED
Spokane, WA · License CAPCOCL756JG · First registered 2025
- CAPITAL PLUMBING & HEATING INCRE-LICENSED
Dalton Gardens, ID · License CAPITPH965JE · First registered 2004
- CARDINAL HEATING & AIREXPIRED
Kirkland, WA · License CARDIHA766JZ · First registered 2024
- CAREY ROEMER PLUMBINGRE-LICENSED
Spokane, WA · License CAREYRP943OK · First registered 2006
- CARLSON MECHANICALSUPERCEDED
Mill Creek, WA · License CARLSM*767B4 · First registered 2024
- CARLSON PLUMBING COMPANY LLCEXPIRED
Vancouver, WA · License CARLSPC772NJ · First registered 2023
- CARTER PLUMBING INCEXPIRED
Amboy, WA · License CARTEPI854KM · First registered 2015
- CARTERWORKS LLCOUT OF BUSINESS
Kent, WA · License CARTEL*785NR · First registered 2022
- CASCADE BACKFLOW SERVICESOUT OF BUSINESS
Wenatchee, WA · License CASCABS818NK · First registered 2019
Estacada, OR · License CASCAMS997M7 · First registered 2001
- CASCADE NORTHWEST PLUMBING INCRE-LICENSED
Woodland, WA · License CASCANP813B8 · First registered 2019
- CASCADE PLUMBING & HTG INCRE-LICENSED
White Salmon, WA · License CASCAPH991KC · First registered 2001
- CASCADE PLUMBING CORE-LICENSED
Dundee, OR · License CASCAPC851KQ · First registered 2015
- CASCADE PLUMBING SERVICE COEXPIRED
Woodland, WA · License CASCAPS850OB · First registered 2015
- CASE MECHANICAL LLCEXPIRED
Amboy, WA · License CASEMML794RZ · First registered 2021
- CASHMERE PLUMBING INCRE-LICENSED
Cashmere, WA · License CASHMPI044CL · First registered 1996
- CASIANO TRANSPORT LLCSUSPENDED
Seattle, WA · License CASIATL781K6 · First registered 2022
- CASTLE PLUMBING SERVICE INCEXPIRED
Langley, WA · License CASTLPS971JA · First registered 2003
- CASTRO PLUMBINGEXPIRED
Everett, WA · License CASTRP*837PS · First registered 2017
- CATES PLUMBING LLCEXPIRED
Vancouver, WA · License CATESPL784OT · First registered 2022
- CATES PLUMBING LLCEXPIRED
Vancouver, WA · License CATESPL819B2 · First registered 2019
- CATTERALL PLUMBING INCRE-LICENSED
Renton, WA · License CATTEPI011J1 · First registered 1999
- CD'S PLUMBING LLCEXPIRED
Silverdale, WA · License CDSPLPL807NC · First registered 2020
- CDB MECHANICAL INCEXPIRED
Davenport, WA · License CDBMEMI785PD · First registered 2022
- CEDAR CREEK PLUMBINGRE-LICENSED
Woodland, WA · License CEDARCP077CA · First registered 1993
- CENTRAL PLBG & MECHINACTIVE
Ellensburg, WA · License CENTRPM777OG · First registered 2023
- CENTRAL PLUMBING LLCSUSPENDED
Bremerton, WA · License CENTRPL790OZ · First registered 2022
- CENTRAL PLUMBING LLCRE-LICENSED
Bremerton, WA · License CENTRPL941DN · First registered 2006
- CENTRAL WASHINGTON PLBG LLCSUSPENDED
Rock Island, WA · License CENTRWP754Q4 · First registered 2025
Sammamish, WA · License CERTIBT781PC · First registered 2022
Sammamish, WA · License CERTIBT905DU · First registered 2010
- CERTIFIED PLUMBINGEXPIRED
Bellevue, WA · License CERTIP*830QG · First registered 2017
- CHAD THE PLUMBER LLCEXPIRED
Dixie, WA · License CHADPPL773BD · First registered 2023
- CHEHALIS PLUMBINGSUSPENDED
Centralia, WA · License CHEHAP*780OR · First registered 2022
- CHELAN VALLEY HTG & COOL LLCEXPIRED
Manson, WA · License CHELAVH764NR · First registered 2024
- CHIPPEROUT OF BUSINESS
Renton, WA · License CHIPP**775O7 · First registered 2023
- CHIPPEREXPIRED
Tukwila, WA · License CHIPP**780PK · First registered 2022
- CHOI'S CONSTRUCTIONEXPIRED
Tacoma, WA · License CHOISC*789DC · First registered 2022
- CHOI'S PLUMBINGEXPIRED
Tacoma, WA · License CHOISP*796OA · First registered 2021
- CHOI'S PLUMBINGOUT OF BUSINESS
Tacoma, WA · License CHOISP*953D8 · First registered 2005
Walla Walla, WA · License CHRISJP793PE · First registered 2022
- CHRIS PALMER CONSTRUCTIONSUSPENDED
Oroville, WA · License CHRISPC742J9 · First registered 2026
- CHUCKANUT PLUMBING LLCEXPIRED
Bellingham, WA · License CHUCKPL793D5 · First registered 2021
- CHUCKANUT PLUMBING LLCEXPIRED
Bellingham, WA · License CHUCKPL793O7 · First registered 2021
- CITY PLUMBING INCEXPIRED
Marysville, WA · License CITYPI*955KJ · First registered 2005