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.

YOCHUM PLUMBING LLCACTIVE
Lewiston, ID · License YOCHUPL781OZ · Registered 4 years
YOUNG'S HEATING & COOLING LLCACTIVE
Walla Walla, WA · License YOUNGHC753DO · Registered 1 year
YOUNGERS ELEC PUMP & IRR LLCACTIVE
Ephrata, WA · License YOUNGEP781P7 · Registered 3 years
YOUR LOCAL PLUMBING COMP LLCACTIVE
Tacoma, WA · License YOURLLP784C2 · Registered 4 years
YVN PLUMBING LLCACTIVE
Battle Ground, WA · License YVNPLPL752NN · Registered 1 year
Yeti Plumbing Services LLCACTIVE
Tacoma, WA · License YETIPPS794O1 · Registered 4 years
Your Side Construction IncACTIVE
Kent, WA · License YOURSSC771BT · Registered 3 years
Z'S PLUMBING LLCACTIVE
Mount Vernon, WA · License ZSPLUPL759O6 · Registered 1 year
ZACH'S BACKFLOW SERVICE LLCACTIVE
Sequim, WA · License ZACHSBS762JR · Registered 2 years
ZESBRO PLUMBING LLCACTIVE
Seattle, WA · License ZESBRPL787BR · Registered 4 years
ZIM'S PLUMBING LLCACTIVE
North Bend, WA · License ZIMSPPL795QW · Registered 4 years
ZOLTAN THE PLUMBERACTIVE
Tukwila, WA · License ZOLTAP*782DH · Registered 4 years
ZOOM DRAIN PORTLANDACTIVE
Tigard, OR · License ZOOMDDP748DT · Registered less than 1 year
ZOOM DRAIN WASHINGTONACTIVE
Puyallup, WA · License ZOOMDDW767MA · Registered 2 years
ZPLUMBERZ OF KENNEWICKACTIVE
Kennewick, WA · License ZPLUMK*754NH · Registered 1 year
ZUIDERWEG CONSTRUCTION LLCACTIVE
Arlington, WA · License ZUIDECL788OH · Registered 4 years
1-TOM PLUMBER OF OLYMPIASUSPENDED
Rochester, WA · License 1TOMPPO753RH · First registered 2025
1ST CHOICE PLUMBING INCEXPIRED
Everett, WA · License 1STCHPI011BN · First registered 1999
1ST RESPONSE PLUMBINGEXPIRED
Spokane, WA · License 1STRERP913RQ · First registered 2009
2 GUYS PLUMBING LLCRE-LICENSED
Castle Rock, WA · License 2GUYSGP820JD · First registered 2018
206 PLUMBING LLCRE-LICENSED
Seattle, WA · License 206PLPL864BH · First registered 2014
24/7 ELECTRIC & PLUMBING LLCEXPIRED
Redmond, WA · License 247ELEP794NS · First registered 2021
24/7 ELECTRIC & PLUMBING LLCRE-LICENSED
Redmond, WA · License 247ELEP808OJ · First registered 2020
360 Backflow ServicesEXPIRED
Tulalip, WA · License 360BABS772O8 · First registered 2023
360 PLUMBING AND SERVICE LLCEXPIRED
North Bend, WA · License 360PLPS787MH · First registered 2022
360 PLUMBING AND SERVICE LLCRE-LICENSED
North Bend, WA · License 360PLPS906OA · First registered 2010
3G PLUMBING SOLUTIONS LLCRE-LICENSED
Bonney Lake, WA · License 3GPLUPS888QA · First registered 2012
4 SEASONS ELEC PLBG HTG & AIRSUSPENDED
Mill Creek, WA · License 4SEASSE751CE · First registered 2025
411 PLUMBING LLCEXPIRED
Bothell, WA · License 411PLPL780DG · First registered 2022
5 CORNERS PLUMBING LLCRE-LICENSED
Kirkland, WA · License 5CORNCP956KD · First registered 2005
5 T PLUMBING LLCEXPIRED
Amboy, WA · License 5TPLUL*784OK · First registered 2022
906 CONSTRUCTION LLCEXPIRED
Battle Ground, WA · License 906COCL795RD · First registered 2022
A & A PUMP SALES LLCSUSPENDED
The Dalles, OR · License PUMPS*P767CB · First registered 2024
A - LIST PLUMBINGSUPERCEDED
Lynnwood, WA · License LISTPLP783DB · First registered 2022
A - LIST PLUMBINGRE-LICENSED
Lynnwood, WA · License LISTPLP819RT · First registered 2020
A A PLUMBING LLCSUSPENDED
Arlington, WA · License PLUMBPL757Q1 · First registered 2025
A ADVANCED SEPTIC SERVICES INCEXPIRED
Auburn, WA · License ADVANAS783O1 · First registered 2022
A AFFORDABLE PLUMBING CO INCEXPIRED
Yelm, WA · License AFFORAP898N2 · First registered 2011
A B PLUMBING LLCEXPIRED
McKenna, WA · License BPLUMPL948JM · First registered 2006
A BETTER BACKFLOW LLCEXPIRED
Nine Mile Falls, WA · License BETTEBB872RW · First registered 2013
A BLUE COLLAR PLUMBER LLCEXPIRED
Tacoma, WA · License BLUECBC851JA · First registered 2015
A GRADE PLUMBING LLCEXPIRED
Hayden, ID · License GRADEPL791NQ · First registered 2021
A L PLUMBING LLCRE-LICENSED
Seattle, WA · License LPLUMPL953NJ · First registered 2005
A PLUMBING DOCTOR INCRE-LICENSED
Olympia, WA · License APLUMDI820RL · First registered 2018
A QUALITY PLUMBER INCEXPIRED
Lynnwood, WA · License AQUALPI771LT · First registered 2023
A Quality Plumber IncRE-LICENSED
Lake Stevens, WA · License QUALIQP871CE · First registered 2013
A R BROWN BACKFLOW TESTINGRE-LICENSED
Lynnwood, WA · License RBROWRB863OK · First registered 2014
A T H PLUMBING LLCEXPIRED
Gig Harbor, WA · License ATHPLL*761DE · First registered 2024
A TO Z PLUMBING LLCEXPIRED
Bremerton, WA · License ZPLUMZP788NR · First registered 2022
A&E FACTORY SERVICE LLCEXPIRED
Hoffman Estates, IL · License EFACTEF896NZ · First registered 2011