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Connecticut HTG-S1 License
Connecticut has 2,071 active HTG-S1 Heating, Piping & Cooling Unlimited Contractor holders in the state file as of 2026-10-311, the 5th-largest of 15 classes with at least 200 holders.
- Active holders
- 2,071
- 4.7% of active Connecticut licenses
What does the Connecticut Heating, Piping & Cooling Unlimited Contractor license require?
Class rules, exam and bond: check with DCP.
How do you check a HTG-S1 license?
Search by license number or business name on the Connecticut license lookup, which reads the same state file.
Other Connecticut license classes
- HTG-D1 Heating, Piping & Cooling Limited Contractor542
- HTG-S7 Heating, Piping & Cooling Limited Contractor325
- HTG-S3 Heating, Piping & Cooling Limited Contractor281
- PLM-P1 Plumbing & Piping Unlimited Contractor2,639
- MCO Major Contractor1,898
- NHC New Home Construction Contractor3,029
- Sheet Metal Limited Contractor662
- ELC-E1 Electrical Unlimited Contractor5,323
Sources
- CT Dept of Consumer Protection via data.ct.gov (ngch-56tr) (portal.ct.gov, 2026-10-31)
- DCP - Plumbing and Piping / Heating Cooling (portal.ct.gov)