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Connecticut HTG-D1 License
Connecticut has 542 active HTG-D1 Heating, Piping & Cooling Limited Contractor holders in the state file as of 2026-10-291, the 9th-largest of 15 classes with at least 200 holders.
- Active holders
- 542
- 1.2% of active Connecticut licenses
What does the Connecticut Heating, Piping & Cooling Limited Contractor license require?
Class rules, exam and bond: check with DCP.
How do you check a HTG-D1 license?
Search by license number or business name on the Connecticut license lookup, which reads the same state file.
Other Connecticut license classes
- HTG-S7 Heating, Piping & Cooling Limited Contractor325
- HTG-S1 Heating, Piping & Cooling Unlimited Contractor2,072
- HTG-S3 Heating, Piping & Cooling Limited Contractor281
- PLM-P7 Plumbing & Piping Limited Contractor632
- FRP-F1 Fire Protection Unlimited Contractor347
- Sheet Metal Limited Contractor662
- MCO Major Contractor1,894
- ELC-L5 Electrical Limited Contractor318
Sources
- CT Dept of Consumer Protection via data.ct.gov (ngch-56tr) (portal.ct.gov, 2026-10-29)
- DCP - Plumbing and Piping / Heating Cooling (portal.ct.gov)