Washington L&I Data · Updated Oct 30, 2026Free and Independent · Not a Government Site

Washington L&I records · updated Oct 30, 2026

Licensed Plumbers in Seattle, WA

104 plumbers with an active Washington contractor registration list a business address in Seattle. Every row shows the registration number, specialty and expiry date exactly as Washington L&I publishes them, plus whether a surety bond and liability insurance are on file.

104active registrations
16registered in the last 12 months
3renewals due within 90 days
98%with a surety bond on file
100%with liability insurance on file
64%registered as LLCs
BusinessLicense #SpecialtyExpiresBondInsurance
Aaa Fire Protection IncAAAFIFP777PZBackflow Specialty Sep 29, 2027On fileOn file
Aaa Water HeatersAAAWAWH741J7Residential Apr 27, 2028On fileOn file
Action PlumbingACTIOP*784BOJourney Level Mar 11, 2028On fileOn file
Advanced Mechanical & PlumbingADVANMP795R3Residential Nov 26, 2026On fileOn file
Anthony'S Plumbing CompanyANTHOPC791NRJourney Level Sep 28, 2027On fileOn file
Aquatechs Water HeaterAQUATWH755RNJourney Level Dec 19, 2027On fileOn file
Aurora PlumbingAURORP*798NZResidential Aug 16, 2027On fileOn file
Beagle Services Inc.BEAGLSI781NBJourney Level Jul 19, 2028On fileOn file
Bee'S Plbg, Htg & Swr Co LLCBEESPPH75127Journey Level May 27, 2027On fileOn file
Ben'S PlumbingBENSPP*762ORResidential Sep 19, 2028On fileOn file
Best Plumbing Group LLCBESTPPG797MFJourney Level Feb 9, 2028On fileOn file
Bogman Company LLCBOGMACL790OMJourney Level Sep 8, 2027On fileOn file
Bpg Plumbs LLCBPGPLPL742B9Journey Level Feb 3, 2028On fileOn file
Brennan Heating & A/C LLCBRENNHC795OOJourney Level Sep 7, 2027On fileOn file
Button Plumbing & Heating LLCBUTTOPH796ONJourney Level Sep 2, 2027On fileOn file
Cascade Craft Plumbing LLCCASCACP741ODResidential Sep 4, 2028On fileOn file
Centerline Plumbing LLCCENTEPL780DSJourney Level Mar 18, 2028On fileOn file
Clearview Mechanical IncCLEARMI783LPJourney Level Jun 8, 2028On fileOn file
Collier Plumber IncCOLLIPI792MOResidential Aug 7, 2027On fileOn file
Columbia Fire LLCCOLUMFL755RRBackflow Specialty Dec 19, 2027On fileOn file
Convey PlumbingCONVEP*793OOJourney Level Nov 4, 2027On fileOn file
Costco Wholesale CorporationCOSTCWC770K6Journey Level Jun 5, 2027On fileOn file
Craftsman Plumbing LLCCRAFTPL798P9Journey Level Oct 25, 2027On fileOn file
Crescent BuildsCRESCB*763JJResidential Apr 25, 2028On fileOn file
D Henry IncDHENRHI775C2Residential Mar 27, 2027On fileOn file
Dandelion Plumbing LLCDANDEPL757NRJourney Level Aug 19, 2027On fileOn file
Delta Plumbing LLCDELTAPL755M5Residential Jul 25, 2027On fileOn file
Dixon Backflow Testing LLCDIXONBT751RQBackflow Specialty Dec 12, 2027On fileOn file
E&B Plumbing ProsEBPLUPP747CSJourney Level Feb 10, 2028On fileOn file
Economywise Plumbing LLCECONOPL777DFJourney Level Mar 6, 2027On fileOn file
Elite Plumbing And Mech LLCELITEPM796Q2Journey Level Nov 22, 2027On fileOn file
Emerald City Plbg & Sewer LLCEMERACP782DCResidential Apr 24, 2028On fileOn file
Excell Plumbing IncEXCELPI791NLJourney Level Sep 23, 2027On fileOn file
Fil-Am PlumbingFILAMP*791NQJourney Level Nov 4, 2027On fileOn file
Green Cty Plumbing & Sewer LLCGREENCP766RZResidential Dec 9, 2026On fileOn file
Green Planet Plbg & Swr LLCGREENPP791R3Journey Level Feb 4, 2028On fileOn file
Greenwood Htng & Home ServicesGREENHH7716MResidential Sep 18, 2027On fileOn file
Greenwood True Value HardwareGREENTV745CFJourney Level Apr 9, 2028On fileOn file
GroundworksGROUN**756KNJourney Level May 15, 2027On fileOn file
Hans' Plmbg & Drain Clng LLCHANSPPD795MLResidential Sep 9, 2027On fileOn file
Hd Partners LLCHDPARPL766N7Journey Level Aug 27, 2028On fileOn file
Ho'S Plumbing CoHOSPLPC782BLJourney Level Jan 27, 2028On fileOn file
Homeservice Plumbers LLCHOMESPL773KWJourney Level May 16, 2027On fileOn file
Instant Accurate Plumbing LLCINSTAAP790QWResidential Nov 22, 2027On fileOn file
Integrity Energy SystemsINTEGES771L8Journey Level Jul 22, 2028On fileOn file
J Alden PlumbingJALDEAP762DGResidential Mar 11, 2028On fileOn file
Jafco Company LLCJAFCOCL797O2Journey Level Sep 1, 2027On fileOn file
Jake The PlumberJAKEPP*781BLJourney Level Jan 26, 2028On fileOn file
Jgm Plumbing & Mech Servs LLCJGMPLPM779LTJourney Level Jun 30, 2027On fileOn file
Js Plumbing IncJSPLUPI764NAJourney Level Aug 2, 2028On fileOn file
Jt Plumbing LLCJTPLUPL796O8Residential Nov 5, 2027On fileOn file
Knockout Plumbing & Mech LLCKNOCKPM743K9Journey Level Jun 2, 2028On fileOn file
Knockout Plumbing & Mech LLCKNOCKPM782DBResidential Mar 25, 2028On fileOn file
Lakeside Plumbing & Htg IncLAKESPH797OZJourney Level Aug 31, 2027On fileOn file
Level Of Comfort LLCLEVELCL780JRJourney Level Apr 18, 2028On fileOn file
Liquid PlumberLIQUIP*751LFJourney Level Jun 6, 2027On fileOn file
Little Guy Plmbng & Mech LLCLITTLGP774OEJourney Level Sep 5, 2027On fileOn file
Macdonald-Miller Fac Solns LLCMACDOFS798P9Journey Level Oct 25, 2027On fileOn file
Marks Plumbing Service LLCMARKSPS763NBJourney Level Aug 24, 2028On fileOn file
Martha'S Plumbing LLCMARTHPL773L3Journey Level Jun 27, 2027On fileOn file
Matt'S Plumbing & Mech LLCMATTSPM780OLJourney Level Sep 13, 2028On fileOn file
Mckinstry Co LLCMCKINCL793NGJourney Level Sep 3, 2027On fileOn file
Mega Mushroom LLCMEGAMML769DFJourney Level Feb 13, 2028On fileOn file
Mr Simmons Plumbing Co IncMRSIMSP781CMJourney Level Jan 31, 2028On fileOn file
Nero PlumbingNEROPP*742OQResidential Sep 18, 2028On fileOn file
Nic'S Plumbing LLCNICSPPL742MNResidential Jul 15, 2028On fileOn file
Npm Plumbing & Mech IncNPMPLPM773JRJourney Level Sep 18, 2027On fileOn file
O'Neill Plumbing CoONEILPC793NDJourney Level Jul 26, 2027On fileOn file
Ocean Park Mechanical IncOCEANPM792NWJourney Level Aug 10, 2027On fileOn file
Odyssey PlumbingODYSSP*772POJourney Level Nov 13, 2027On fileOn file
Pacific Custom Sewer &DrainagePACIFCS762RPJourney Level Dec 17, 2026On fileOn file
Paradiso MechanicalPARADM*789DHJourney Level Mar 28, 2028On fileOn file
Parker Services IncPARKESI792OAJourney Level Sep 27, 2027On fileOn file
Pinky'S Plumbing LLCPINKYPL799MWJourney Level Oct 15, 2027On fileOn file
Pioneer Plumbing & HeatingPIONEPH797NEJourney Level Aug 9, 2027On fileOn file
Precision Pipe & Weld LLCPRECIPW747OQJourney Level Sep 25, 2028On fileOn file
Premier Plumbing LLCPREMIPL795N4Journey Level Nov 20, 2027On fileOn file
Quality PlumbingQUALIP*795NUJourney Level Aug 24, 2027On fileOn file
Rebath North SeattleREBATNS748BHResidential Jan 9, 2028On fileOn file
Redworks Plumbing IncREDWOWP774RMResidential Dec 14, 2027On fileOn file
Roundabout Plumbing LLCROUNDPL742O9Journey Level Oct 1, 2028On fileOn file
Rush Plumbing IncRUSHPPI783D8Journey Level May 13, 2028On fileOn file
Safe & Sound Plumbing LLCSAFESSP785LHJourney Level Jun 8, 2028On fileOn file
Salish Plumbing Co PLLCSALISPC788OMResidential Sep 19, 2028On fileOn file
Simple Plumber LLCSIMPLPL797MFJourney Level Aug 5, 2027On fileOn file
Simple Solutions IncSIMPLSI776CZJourney Level Feb 9, 2027On fileOn file
Sjs Mechanical Services LLCSJSMEMS797MGJourney Level Jul 19, 2027On fileOn file
Soreano Plumbing ServiceSOREAPS747MUJourney Level Jul 31, 2028On fileOn file
Sounder Plumbing LLCSOUNDPL776P6Residential Nov 14, 2027On fileOn file
Steve Gabler Plumbing LLCSTEVEGP760N2Journey Level Aug 23, 2028On fileOn file
Stoic Plumbing LLCSTOICPL751BHJourney Level May 15, 2027On fileOn file
Taj Plumbing LLCTAJPLPL796PDResidential Nov 5, 2027On fileOn file
Taylor'D Plbg & Gen ContrgTAYLOPG761OEJourney Level Sep 5, 2028On fileOn file
The Plumbing GeekPLUMBPG781LGResidential May 26, 2028On fileOn file
Uncle Shietz Plumbing IncUNCLESP790PFJourney Level Feb 13, 2028On fileOn file
Viator PlumbingVIATOP*749PHJourney Level Oct 8, 2028On fileOn file
WaterWATER**762J2Journey Level Jun 12, 2028On fileOn file
Watertite Plbg Htg & Sewer LLCWATERPH797NGResidential Sep 7, 2027On fileOn file
Wesnor Plumbing & Heating LLCWESNOPH794RWJourney Level Dec 15, 2027On fileOn file
William Leonard LLCWILLILL790P9Journey Level Feb 15, 2028On fileOn file
Page 1 of 2 Next page of licensed plumbers in Seattle (page 2)

What These Seattle Records Tell You

Seattle ranks #105 of our 200 launch pages by number of active registrations. The most common registered specialties here are journey level (73), residential (28), backflow specialty (3). 3 registrations expire within the next 90 days, so check the date again before signing a contract.

A "bond on file" means Washington L&I lists an uncancelled surety bond for that registration. Washington law requires a $30,000 bond for general contractors and $15,000 for specialty contractors (RCW 18.27.040). Electrical contractors are licensed under a separate L&I program, so their liability insurance is not part of the construction-contractor insurance dataset.

Plumbers in Other Washington Cities

Other Licensed Trades in Seattle

Accuracy notice. Data is copied from Washington L&I open data as of Oct 30, 2026 and may have changed since. A missing listing does not mean a business is unlicensed. To search any business by name or number, use the Washington contractor license lookup.