Connecticut permits
Do you need a permit in Connecticut?
Connecticut enforces the State Building Code (IRC-based) statewide through local building officials. Connecticut requires Home Improvement Contractor (HIC) registration for residential improvement work, plus separate trade licensing for electrical, plumbing, and HVAC. Coastal towns add flood and shoreline review.
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These are statewide ranges. Get your exact Connecticut cost for your zip code and project size.
Can a homeowner pull the permit?
Yes, in most cases. Owner-occupied 1-2 family homes. Trade work (electrical, plumbing, HVAC) generally requires licensed professionals on covered work.
Where to file: Municipal building department. Each town has its own building official. Larger towns have portals; smaller towns may be in-person. Plan review 1-3 weeks.
Permits by trade in Connecticut
| Trade | When required | Citation | Typical fee | DIY? |
|---|---|---|---|---|
| Plumbing | In-wall work, fixtures, water heater, gas | CT plumbing licensing | $75-$300 | No |
| Electrical | New circuits, panel, service upgrade, EV charger | CT electrical licensing; NEC | $75-$300 | No |
| Mechanical (HVAC) | Boiler/furnace, AC, ductwork, refrigerant | CT HVAC licensing | $100-$300 | No |
| Building (structural) | Additions, structural mods, decks | CT State Building Code | $150-$1,000 | Yes |
| Roofing | Re-roofs, structural deck repair | Local jurisdiction | $75-$300 | Yes |
| HIC registration | Hired residential improvement work | CT Dept of Consumer Protection | N/A | Yes |
Hover a Conditional or No entry for the homeowner rule. Always confirm with your local building department, since requirements vary by jurisdiction.
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