John J Czerwiec

Plumber · Denver, Colorado

License number	1688
Trade	Plumber
License holder	John J Czerwiec
Location	Denver, CO 80212
Licensed since	1978
Status	Current, Active (as of 2026-08-25)

Verify license 1688 on the official Colorado portal

What this record tells you

John J Czerwiec holds Colorado license 1688, authorizing work as a plumber — 48 years of continuous licensure. It is one of 544 active plumber licenses in Denver, so you have local alternatives to compare quotes against. Confirm the current status on the official state portal before signing a contract.

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This page is generated from Colorado public license records for consumer-protection purposes. John J Czerwiec has not claimed this page, is not a sponsor, and no endorsement is implied. Always re-verify license status and insurance before hiring. Verify a Pro is a service operated by Scion Media, not affiliated with any government agency.