Plumbing contractors in Friday Harbor, WA

7 active plumbing contractors are registered with Washington L&I at a Friday Harbor, WA address. 13 registrations are on record in all, including expired and other statuses.

By the numbers

Active registrations: 7
Registrations on record, all statuses: 13
Registered in the last 12 months: 1
Median years registered, active: 2
Suspension on record: 3
Complaint records matched: 0

Counts of L&I contractor registration records, computed October 8, 2026. Active means the state's record shows ACTIVE status. Years are counted from each registration's effective date.
Suspension on record: registrations with SUSPENDED status, plus active or re-licensed registrations that carry a suspension date.
Complaint records matched: contractors with at least one Attorney General consumer complaint record under the same business name and city. A complaint record is not a finding of wrongdoing.
Sources: L&I Contractor License Data - General andAttorney General Consumer Complaints. Seehow directory numbers are computed.

Longest registered

NORTHWEST PLBG/WATERWORKS INCRegistered since October 8, 2021
CRB LLCRegistered since November 22, 2022
MAULDIN'S WELL SERVICE INCRegistered since February 2, 2023
DONOVAN WILSON PLUMBING LLCRegistered since January 1, 2024
RIPTIDE PLUMBING, LLCRegistered since March 3, 2025

Recently registered

DUNCAN PLUMBING COMPANY LLCRegistered on September 15, 2026
SAN JUAN HEATING LLCRegistered on August 27, 2025
RIPTIDE PLUMBING, LLCRegistered on March 3, 2025
DONOVAN WILSON PLUMBING LLCRegistered on January 1, 2024
MAULDIN'S WELL SERVICE INCRegistered on February 2, 2023

Active registrations, by the effective date on the state's record.

All 13 registrations on record

Businesses by registered name and license number. Show only the 7 active registrations.

CRB LLCACTIVE
License CRBLLL*786RZ · Registered 3 years
DONOVAN WILSON PLUMBING LLCACTIVE
License DONOVWP773RR · Registered 2 years
DUNCAN PLUMBING COMPANY LLCACTIVE
License DUNCAPC745ON · Registered less than 1 year
MAULDIN'S WELL SERVICE INCACTIVE
License MAULDWS785DD · Registered 3 years
NORTHWEST PLBG/WATERWORKS INCACTIVE
License NORTHPI790MG · Registered 5 years
RIPTIDE PLUMBING, LLCACTIVE
License RIPTIPL755DK · Registered 1 year
SAN JUAN HEATING LLCACTIVE
License SANJUJH757N8 · Registered 1 year
BASIC PLUMBINGEXPIRED
License BASICP*023RQ · First registered 1998
DUNCANS BACKFLOW AMB TEST RPRSUSPENDED
License DUNCABA760RQ · First registered 2024
LOCAL PLUMBERRE-LICENSED
License LOCALP*011P7 · First registered 1999
LOCAL PLUMBERSUSPENDED
License LOCALP*788PC · First registered 2022
MAULDIN'S WELL SERVICE INCSUPERCEDED
License MAULDWS792OB · First registered 2021
TOP NOTCH PLUMBINGRE-LICENSED
License TOPNONP901C6 · First registered 2010