For All Information on 2025
Revaluation of Real Property - Click Here
Office Hours
Monday, Tuesday, Wednesday 8:30am-5 pm - Thursday 8:30am-6pm - Friday 8:30am-12:30pm
A reminder that the Assessor's Office is closed for lunch from approximately 1:00 p.m. to 2:00 pm - Monday through Thursday
Betsy Quist, Assessor
1 Elizabeth Street - Derby, CT 06418
203-736-1455
bquist@derbyct.gov
Lauren Culmo. Assistant
203-736-1455
lculmo@derbyct.gov
Board of Assessment Appeals - 2025 form - Motor Vehicles Only - Due by 09-14-2026
Board of Assessment Appeals - 2026 form - Real Estate Only - Due by February 20, 2027
2026-2027 Mill Rate is 38.44 - Click here for Grand List & Budget Historical Data
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Click Here for 2026 Personal Property Declaration Forms
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The Valley Council Of Governments GIS Map Service allows internet users to obtain property assessment information as well as zoning, environmental, and planimetric data.
Click on this link for DMV vehicle on-line services.
Click here link to obtain copies of Military Service Records
Home Owner's Rebate Application Package for 2025 - Filing deadline is May 15, 2026.
Renter's Rebate Application Package for 2025 - Filing deadline is September 30, 2026.
Annual Income & Expense Report Package for 2024 - Filing deadline is June 1, 2025.
Motor Vehicles are assessed according to State Statutes at 70% of the clean retail value through the use of the National Automobile Dealers Association (NADA) guides and other resources.
The uniform Assessment date is October 1st in Connecticut. Vehicles registered as of October 1st will be part of the October 1st Grand List. Vehicles registered after October 1st, but prior to August 1st, will be on the Supplemental list.
If you disposed of a vehicle and did not transfer the plates you may be eligible for a tax credit. The City is not informed when plates are canceled, so it is the taxpayer’s responsibility to provide the required documentation within the time limits. In accordance with CT State Statute application for tax credit needs to be made within 27 months of the assessment date.
Click here for documents required to receive a tax credit on your motor vehicle.
If you transferred your plates from one vehicle to another you are not entitled to an adjustment. The bill you receive for the vehicle that was registered as of October 1st will be paid in full. You will receive a Supplemental bill for the new vehicle the plates were transferred to with a credit from the previous vehicle that was paid for in full.