What is the property tax appeal deadline in Connecticut?

Within 90 days of the assessment date (February 20 deadline). Typical deadline month: February. Always verify the current deadline with your local assessor as dates can change.

What is the success rate for property tax appeals in Connecticut?

An estimated 44% of property tax appeals in Connecticut result in a reduction. This is based on Lincoln Institute research and state-reported data. Success rates are highest when appeals are supported by recent comparable sales.

2026 data Free guide Connecticut

Connecticut Property Tax Appeal Guide

Q: How do I appeal my property tax in Connecticut?

In Connecticut, file your appeal with the Board of Assessment Appeals. The typical deadline is Within 90 days of the assessment date (February 20 deadline). The filing fee is $0. Start by contacting your assessor informally, then follow the formal process if unresolved.

How to challenge your property tax assessment in Connecticut — deadlines, process, and a savings calculator.

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Compiled byPlainpropertytax Editorial, Property Tax Editorial Team

February

Typical Deadline

Filing Fee

~44%

Est. Success Rate

Board of Assessment Appeals

Appeal Body

What This Data Tells Us About Appeals in Connecticut

In Connecticut, property tax appeals are filed with the Board of Assessment Appeals. The typical window is Within 90 days of the assessment date (February 20 deadline), with the deadline most commonly falling in February. Filing fees reported for this state are $0, and Lincoln Institute research plus state-reported data suggest roughly 44% of appeals result in some reduction when supported by comparable sales or documented errors.

Connecticut assesses property at 70% of fair market value. Revaluation cycles vary by municipality (generally every 5 years). Appeals are driven by the gap between a parcel's assessed value and its actual market value — the calculator below turns that gap into an annualized dollar figure at your effective tax rate. The strongest evidence is three to five arms-length comparable sales from the past six to twelve months, plus documentation of any factual errors in the assessor's record (square footage, bedroom count, finished-basement status).

This guide is for informational purposes only and is not legal or tax advice. Deadlines, filing fees, success rates, and procedures vary by county within Connecticut and can change year to year. Always verify the current rules with your local assessor's office — or a licensed attorney or tax professional — before filing. Source: Connecticut Office of Policy and Management.

Appeal Deadline

Within 90 days of the assessment date (February 20 deadline)

Appeal Body: Board of Assessment Appeals

Step-by-Step Appeal Process

1
Review your assessment notice from the municipal assessor
2
File an appeal with the Board of Assessment Appeals by February 20
3
Attend a hearing (typically March) and present your evidence
4
If unsatisfied, appeal to the Superior Court within 2 months of the Board's decision

Connecticut-Specific Notes

Connecticut assesses property at 70% of fair market value. Revaluation cycles vary by municipality (generally every 5 years).

Source: Connecticut Office of Policy and Management

Assessment Savings Calculator

Estimate whether an appeal is financially worthwhile and your potential annual savings.

Current Assessed Value ($)

Estimated Market Value ($)

Effective Tax Rate (%)

Find your rate on your tax bill or the county website

Frequently Asked Questions

How do I appeal my property tax in Connecticut?

File with the Board of Assessment Appeals. Within 90 days of the assessment date (February 20 deadline). Start by requesting an informal review with your assessor, then follow the formal process outlined above if the issue is not resolved.

What is the Connecticut property tax appeal deadline?

Within 90 days of the assessment date (February 20 deadline). The typical deadline month is February. Always confirm the exact date with your local assessor's office, as deadlines can change year to year.

Do I need an attorney to appeal property taxes in Connecticut?

No. Most homeowners successfully appeal without legal representation, especially at the initial administrative level. The process is designed to be accessible to ordinary homeowners.

What evidence is most effective for property tax appeals in Connecticut?

Recent sales of comparable homes (3–5 "comps" from the last 6–12 months) that sold for less than your assessed value are the strongest evidence. An independent appraisal ($400–$800) is the gold standard. Property data errors (wrong square footage, extra rooms) are also persuasive.

Disclaimer: This guide is for informational purposes only and does not constitute legal or tax advice. Appeal deadlines, procedures, filing fees, and success rates vary by county within Connecticut and change over time. Always verify current rules with your local assessor's office or a licensed attorney before filing. Success rates are estimates based on Lincoln Institute of Land Policy research and state-reported data — individual results vary.

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