Know Your Permits.
Connecticut has 169 building departments and no two run alike.
Permitting is local here, not state-run, so the fees and the waiting vary town to town. The sequence, though, is the same everywhere. Learn the order and you can plan around whichever department you have drawn.
| Zoning review | Setbacks, coverage, height | 1–3 wks |
| Building permit | Stamped drawings for most work | 2–6 wks |
| Health department | Septic or private well only | 2–4 wks |
| Trade permits | Often filed by your subs | Parallel |
| Inspections | Footing, frame, rough, insulation, final | Throughout |
| Certificate of Occupancy | Also triggers reassessment | The end |
The same piece of paper that lets you move in tells the assessor you are finished. If you want the tax clock to start later, the CO date is the lever, not the construction schedule.
Fees are usually struck as a percentage of declared construction value, commonly one to two percent. Beyond that, the pattern runs roughly like this:
Large towns like Stamford, Hartford and New Haven have longer queues but more predictable digital intake. You wait, but you know what you are waiting for.
Small rural towns move faster in principle, but may only sit on certain days. Miss the meeting and you have lost two weeks to a calendar rather than a reviewer.
Historic districts and the coastal zone, which cover much of Fairfield and New London counties, add a review layer that is not optional and is rarely quick.
Connecticut has passed ADU-friendly zoning reform at the state level, but towns implement it differently. Some permit ADUs by right; others still want a special permit or a variance. That distinction is worth months. Confirm your town's current ordinance before you build a schedule around it.
This describes the general pattern, not any one town's process. Call your building department before you commit to a budget or a date.