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.
- NORTH FORK PLUMBING LLCRE-LICENSED
La Center, WA · License NORTHFP847RO · First registered 2016
- NORTH PALOUSE PLUMBING LLCEXPIRED
Waverly, WA · License NORTHPP794NU · First registered 2021
- NORTH PALOUSE PLUMBING LLCRE-LICENSED
Waverly, WA · License NORTHPP828KT · First registered 2018
- NORTH PLUMBING LLCEXPIRED
Cougar, WA · License NORTHPL787JH · First registered 2022
- NORTH SOUND PLUMBINGEXPIRED
Kenmore, WA · License NORTHSP120B6 · First registered 1988
- NORTH SOUND WATER HEATER LLCEXPIRED
Anacortes, WA · License NORTHSW788DM · First registered 2022
- NORTH SOUND WATER HEATER LLCRE-LICENSED
Anacortes, WA · License NORTHSW794DR · First registered 2021
- NORTHERN WATERS INCSUPERCEDED
Edmonds, WA · License NORTHWI7849W · First registered 2022
- NORTHLAND PLUMBING INCEXPIRED
Hayden, ID · License NORTHPI904PN · First registered 2010
- NORTHSIDE HEAT & COOLEXPIRED
Colville, WA · License NORTHHC786BR · First registered 2022
- NORTHSTAR CONTRACTING INCSUSPENDED
Davenport, WA · License NORTHCI776BZ · First registered 2023
- NORTHWEST HYDROJETTING LLCEXPIRED
Tacoma, WA · License NORTHHL785KQ · First registered 2022
- NORTHWEST MECHANICALRE-LICENSED
Woodinville, WA · License NORTHM*797O2 · First registered 2021
- NORTHWEST PIPEWORKS LLCRE-LICENSED
Hood River, OR · License NORTHPL842O3 · First registered 2016
Clackamas, OR · License NORTHPB911D5 · First registered 2009
- NORTHWEST PLUMBING & DRAINAGESUSPENDED
Kent, WA · License NORTHPD769PP · First registered 2024
Belfair, WA · License NORTHPM770O6 · First registered 2023
- NORTHWEST PLUMBING CONTRS INCRE-LICENSED
Arlington, WA · License NORTHPC055KB · First registered 1995
- NORTHWEST PRECISION PLMG LLCEXPIRED
Coeur D Alene, ID · License NORTHPP824D1 · First registered 2018
- NORTHWEST TUB REFINISHINGEXPIRED
Tenino, WA · License NORTHTR983LO · First registered 2002
- NORTHWEST WATER SYSTEMS INCSUPERCEDED
Port Orchard, WA · License NORTHWS787RW · First registered 2022
- NOWAK PLUMBING LTDEXPIRED
Port Townsend, WA · License NOWAKPL016M1 · First registered 1999
- NOWAK PLUMBING LTDEXPIRED
Port Townsend, WA · License NOWAKPL782PF · First registered 2022
- NW Custom Plumbing LLCRE-LICENSED
Mount Vernon, WA · License NWCUSCP861CS · First registered 2014
- NW HOME SERVICES LLCEXPIRED
Oregon City, OR · License NWHOMHS771OH · First registered 2023
- NW PLUMB WORX LLCSUSPENDED
Everett, WA · License NWPLUPW753B1 · First registered 2025
- New Life PlumbingEXPIRED
Ellensburg, WA · License NEWLILP815PT · First registered 2019
- Nolan's Gas Piping Svc LLCEXPIRED
Enumclaw, WA · License NOLANGP899BD · First registered 2011
- North J & J PlumbingEXPIRED
Shoreline, WA · License NORTHJJ883K2 · First registered 2012
Lynden, WA · License NORTHWT784K5 · First registered 2022
- O'BRIEN PLUMBINGRE-LICENSED
Seattle, WA · License OBRIEP*092MA · First registered 1991
- O'CONNELL DRILLING/SUPPLY LLCSUPERCEDED
Brewster, WA · License OCONNDL796OB · First registered 2021
- O'KEEFE PLUMBINGEXPIRED
Bothell, WA · License OKEEFP*788N9 · First registered 2022
- O'KEEFE PLUMBINGEXPIRED
Bothell, WA · License OKEEFP*927D1 · First registered 2008
- OAK PLUMBING LLCEXPIRED
Battle Ground, WA · License OAKPLPL848OL · First registered 2016
- OASIS PLUMBING INCOUT OF BUSINESS
Oregon City, OR · License OASISPI890JH · First registered 2011
- OASIS PLUMBING SOLUTIONS LLCEXPIRED
Concrete, WA · License OASISPS772KE · First registered 2023
- OCEANS DESIGN INCSUSPENDED
Colorado Springs, CO · License OCEANDI754OE · First registered 2025
- ODIE'S PLUMBINGRE-LICENSED
Eastsound, WA · License ODIESP*994KG · First registered 2001
- OGBORN PLUMBING CNTRNG INCRE-LICENSED
Tonasket, WA · License OGBORPC934CE · First registered 2007
- OK MECHANICALSUPERCEDED
Chattaroy, WA · License OKMECM*782O1 · First registered 2022
- OK MECHANICALRE-LICENSED
Chattaroy, WA · License OKMECM*892C2 · First registered 2011
- OKANOGAN DRILLING & DEV COSUPERCEDED
Okanogan, WA · License OKANODD799O7 · First registered 2021
- OLIPHANT BROS PLUMBING INCEXPIRED
Poulsbo, WA · License OLIPHBP170JG · First registered 1983
- OLSON PLUMBINGEXPIRED
Camano Island, WA · License OLSONP*791KD · First registered 2021
- OLYMPIC LANDSCAPE LLCEXPIRED
Puyallup, WA · License OLYMPLL780D9 · First registered 2022
Port Angeles, WA · License OLYMPPP819K4 · First registered 2019
- OLYMPIC PLUMBINGRE-LICENSED
Shelton, WA · License OLYMPP*889DO · First registered 2012
- OMAK MACHINE SHOP INCSUPERCEDED
Omak, WA · License OMAKMMS790O1 · First registered 2021
- OMNIS PLUMBING LLCEXPIRED
Renton, WA · License OMNISPL787RN · First registered 2022