Plumbing contractors in Kingston, WA
7 active plumbing contractors are registered with Washington L&I at a Kingston, WA address. 14 registrations are on record in all, including expired and other statuses.
By the numbers
- Active registrations
- 7
- Registrations on record, all statuses
- 14
- Registered in the last 12 months
- 2
- Median years registered, active
- 2
- Suspension on record
- 0
- 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
- CRABTREE WELL DRILLING LLCRegistered since August 25, 2021
- AARON'S PLUMBING LLCRegistered since August 27, 2021
- SUPREME PLUMBING COMPANY, LLCRegistered since January 11, 2022
- BACKFLOW ASSEMBLY SLTNS INCRegistered since May 24, 2024
- CASCADIA MECHANICALRegistered since November 14, 2024
Recently registered
- PIPECRAFT LLCRegistered on February 4, 2026
- CLEAN WATER SEATTLE LLCRegistered on December 12, 2025
- CASCADIA MECHANICALRegistered on November 14, 2024
- BACKFLOW ASSEMBLY SLTNS INCRegistered on May 24, 2024
- SUPREME PLUMBING COMPANY, LLCRegistered on January 11, 2022
Active registrations, by the effective date on the state's record.
7 active registrations
Businesses by registered name and license number. Show all 14 registrations on record, including expired.
- AARON'S PLUMBING LLCACTIVE
License AARONPL797NF · Registered 5 years
License BACKFAS760K4 · Registered 2 years
- CASCADIA MECHANICALACTIVE
License CASCAM*767QM · Registered 1 year
- CLEAN WATER SEATTLE LLCACTIVE
License CLEANWS754RB · Registered less than 1 year
License CRABTWD786LS · Registered 5 years
- PIPECRAFT LLCACTIVE
License PIPECL*741C5 · Registered less than 1 year
License SUPREPC783BJ · Registered 4 years