Connecticut property tax appeals, 2027
In Connecticut, you appeal a property assessment to the Board of Assessment Appeals, and the deadline is February 20 (March 20 where the town has a grand list extension). Each county below lists its own date, how to file and who hears the appeal. Sale prices are public record here, so recent sales of similar homes are the main evidence of market value.
Data as of 20 Oct 2026 · 9 counties, state and county recordsHow appeals work in Connecticut
| Rule | What applies |
|---|---|
| What you argue | Market value as of October 1 of the town’s most recent revaluation year; the value holds until the next revaluation (C.G.S. §12-62(b), §12-62a(a)); uniformity is also recognized (C.G.S. §12-111(a)(3)) |
| How homes are assessed | 70% of market value for homes. 70% of fair market value as of the October 1 date of the town’s last revaluation, not current market value (C.G.S. §12-62a(b), §12-63(a), §12-62(b)). |
| Deadline | On or before February 20; March 20 when the assessor was granted a grand list extension under §12-117 (C.G.S. §12-111(a)(1), (b), §12-112). |
| First appeal to | Board of Assessment Appeals |
| What the notice shows | Often no market value; assessed value as “New Assessment”. Mails: After a revaluation, between the October 1 assessment date and 10 days after the grand list is signed (grand list due January 31); otherwise only when an assessment increases (C.G.S. §12-62(f), §12-55) |
| Sale prices public | Yes |
| Statutes | Grounds: C.G.S. §12-111(a)(1), §12-63(a), §12-62a(b). Filing: C.G.S. §12-111, §12-112. Assessor’s evidence: C.G.S. §12-62(c) (revaluation criteria, price schedules and a 12-month neighborhood sales compilation open for public inspection in the assessor’s office). |
More: how to read your notice · what a ratio is · evidence that works · deadlines in every state
Every Connecticut county
| County | Deadline | Appeal rate | Lowered | Coverage |
|---|---|---|---|---|
| Capitol Planning Region | Not yet published | — | — | Scan from recent sales |
| Western Connecticut Planning Region | Not yet published | — | — | Scan from recent sales |
| South Central Connecticut Planning Region | Not yet published | — | — | Scan from recent sales |
| Naugatuck Valley Planning Region | Not yet published | — | — | Scan from recent sales |
| Greater Bridgeport Planning Region | Not yet published | — | — | Scan from recent sales |
| Southeastern Connecticut Planning Region | Not yet published | — | — | Scan from recent sales |
| Lower Connecticut River Valley Planning Region | Not yet published | — | — | Scan from recent sales |
| Northwest Hills Planning Region | Not yet published | — | — | Scan from recent sales |
| Northeastern Connecticut Planning Region | Not yet published | — | — | Scan from recent sales |
Connecticut questions
When is the property tax appeal deadline in Connecticut?
On or before February 20; March 20 when the assessor was granted a grand list extension under §12-117 (C.G.S. §12-111(a)(1), (b), §12-112). Counties publish the exact date, and most notices print it.
Who hears a property tax appeal in Connecticut?
The Board of Assessment Appeals hears the first appeal (C.G.S. §12-111, §12-112).
How is a home assessed in Connecticut?
At 70% of market value for homes, valued as of October 1 of the town’s most recent revaluation year; the value holds until the next revaluation (C.G.S. §12-62(b), §12-62a(a)).
What does a Connecticut assessment notice show?
Often only an assessed value, and the assessed value, labeled “New Assessment”. Notices mail: After a revaluation, between the October 1 assessment date and 10 days after the grand list is signed (grand list due January 31); otherwise only when an assessment increases (C.G.S. §12-62(f), §12-55).
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- C.G.S. ch. 203 (§§12-55, 12-62, 12-62a, 12-63, 12-111, 12-112, 12-113, 12-117a)
- C.G.S. ch. 223 (real estate conveyance tax, §§12-494, 12-497)
- Town of Bloomfield sample revaluation notice (Oct 1, 2024 grand list)
- Each county’s own appeal instructions and notices, read on the date shown on each county page.
- U.S. Census Bureau, county population estimates (2024).