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.
- MR MECHANICAL PLUMBING LLCEXPIRED
Graham, WA · License MRMECMP791OC · First registered 2021
- MR MECHANICAL PLUMBING LLCRE-LICENSED
Graham, WA · License MRMECMP802P3 · First registered 2020
- MR ROOTER OF PORTLANDRE-LICENSED
Gladstone, OR · License MRROOP*992JP · First registered 2001
- MR ROOTER OF PORTLANDOUT OF BUSINESS
Gladstone, OR · License MRROORP791NB · First registered 2021
- MR ROOTER PLUMBINGEXPIRED
Seattle, WA · License MRROORP795NF · First registered 2021
- MR SIMMONS PLUMBING CO INCEXPIRED
Seattle, WA · License MRSIMSP964OH · First registered 2004
- MSI MECH SYSTEMS INCSUSPENDED
Hillsboro, OR · License MSIMEMS765QM · First registered 2024
- MSI MECH SYSTEMS INCEXPIRED
Hillsboro, OR · License MSIMESI099BQ · First registered 1991
- MT SI PLUMBING & HEATING INCEXPIRED
North Bend, WA · License MTSIPSP957KP · First registered 2005
- MTN PLUMBING LLPEXPIRED
Puyallup, WA · License MTNPLPL792RG · First registered 2021
- MUTINY BAY PLUMBING LLCEXPIRED
Freeland, WA · License MUTINBP961D2 · First registered 2004
- MX PLUMBING INCEXPIRED
Lake Stevens, WA · License MXPLUPI794OA · First registered 2021
- MX PLUMBING INCRE-LICENSED
Lake Stevens, WA · License MXPLUPI903L8 · First registered 2010
- MY BROTHERS PLUMBING LLCEXPIRED
Renton, WA · License MYBROBP794PJ · First registered 2021
- MY PLUMBER LLCRE-LICENSED
Brush Prairie, WA · License MYPLUPL854QP · First registered 2015
- MYKABIN LLCEXPIRED
Bellevue, WA · License MYKABL*797RD · First registered 2022
- MYKOL PUMP DRILLING INCSUPERCEDED
Olympia, WA · License MYKOLPD791O1 · First registered 2021
- Mark's Plumbing Service IncEXPIRED
Everett, WA · License MARKSPS883C9 · First registered 2012
- McCLURE & SONEXPIRED
Grapeview, WA · License MCCLUS*793MK · First registered 2022
- McCLURE & SONRE-LICENSED
Bremerton, WA · License MCCLUS*800Q3 · First registered 2020
- McNeese's Plumbing IncEXPIRED
Olympia, WA · License MCNEEPI879B4 · First registered 2013
- Midsound PlumbingRE-LICENSED
Vashon, WA · License MIDSOP*907K8 · First registered 2010
- Miguel's PlumbingEXPIRED
Renton, WA · License MIGUEP*835QB · First registered 2017
Renton, WA · License MIKEVVD946L6 · First registered 2006
- Mill Creek PlumbingEXPIRED
Mill Creek, WA · License MILLCCP799M9 · First registered 2022
- Mountain Ridge Plumbing LLCEXPIRED
Cle Elum, WA · License MOUNTRP772K2 · First registered 2023
- N M I INCEXPIRED
Kirkland, WA · License NMIIN**077CH · First registered 1993
- NAIR'S PLUMBINGEXPIRED
Shoreline, WA · License NAIRSP*171NP · First registered 1983
- NASH PLUMBINGEXPIRED
Portland, OR · License NASHPP*761J5 · First registered 2024
- NASH PLUMBINGEXPIRED
Portland, OR · License NASHPP*819CL · First registered 2019
- NAUTILUS BACKFLOW SERVICEEXPIRED
Tacoma, WA · License NAUTIBS924PU · First registered 2008
- NAVARRA PLUMBING LLCEXPIRED
Seattle, WA · License NAVARPL830JC · First registered 2017
- NAVY PLUMBING LLCEXPIRED
Tacoma, WA · License NAVYPPL783D2 · First registered 2022
- NBLY CO OPS WA SPV LLCSUSPENDED
Seattle, WA · License NBLYCCO771NB · First registered 2023
Burien, WA · License NEIGHLO76851 · First registered 2024
- NEW BEGININGS PLUMBINGRE-LICENSED
Everett, WA · License NEWBEP*077KO · First registered 1993
- NEWLINE PIPE SOLUTIONS LLCSUSPENDED
Bellevue, WA · License NEWLIPS756B3 · First registered 2025
- NEWTON PLUMBING INCRE-LICENSED
Puyallup, WA · License NEWTOPI927D7 · First registered 2008
- NEWTON'S PLUMBINGEXPIRED
Mount Vernon, WA · License NEWTOP*801BG · First registered 2020
- NEWTON'S PLUMBING & HTG LLCRE-LICENSED
Mount Vernon, WA · License NEWTOPH824BB · First registered 2018
- NEXT RIDGE PLUMBINGSUPERCEDED
Ellensburg, WA · License NEXTRRP765L8 · First registered 2024
- NIRVANA MECHANICAL LLCRE-LICENSED
Bellevue, WA · License NIRVAML845R8 · First registered 2016
- NOBILIS LLCEXPIRED
Spanaway, WA · License NOBILL*763BQ · First registered 2024
- NOBLEMAN'S PLUMBINGEXPIRED
Deer Park, WA · License NOBLEP*006CS · First registered 2000
- NOBUL PLUMBING LLCRE-LICENSED
Lake Stevens, WA · License NOBULPL793L2 · First registered 2021
- NOBUL PLUMBING LLCEXPIRED
Lake Stevens, WA · License NOBULPL794MK · First registered 2021
North Bend, WA · License NORTHBP890JK · First registered 2011
- NORTH CITY PLUMBING LLCEXPIRED
Seattle, WA · License NORTHCP787ND · First registered 2022
- NORTH COAST PLUMBING INCEXPIRED
North Bend, WA · License NORTHCP930KA · First registered 2007
Marysville, WA · License NORTHEP823D8 · First registered 2018