Washington contractor license
NATIONAL BOILER SERVICE INC
- CC-AC Boiler/Steam Fit/Proc Piping
NATIONAL BOILER SERVICE INC is a CC-AC Boiler/Steam Fit/Proc Piping contractor in Trenton, licensed in Washington for 15 years (since 2011). As of Oct 28, 2026, state records list the license as expired, with an expiration date of Apr 22, 2026 and no license bond is on file.
NATIONAL BOILER SERVICE INCCC-AC Boiler/Steam Fit/Proc Piping · checked Oct 28, 2026
ExpiredLicense number#NATIOBS891B8
Licensed sinceMar 11, 2011
Years licensed15 years
Expiration on recordApr 22, 2026
City and countyTrenton
License bondNot on file
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Source: Washington State Department of Labor & Industries (L&I) contractor records. Last updated Oct 28, 2026. Page refreshed Nov 4, 2026.