David Dietsch, CMMA II

Catherine Norton, Assessor Clerk

Hours: Tuesday and Thursday from 12:00 to 1:00, Wednesdays, and by appointment

Address:  562 Colebrook Road, Colebrook, CT 06021

Mailing Address:  P.O. Box 5, Colebrook, CT 06021

Phone: (860) 379-3359  ext. 206         


The Assessor’s Office is responsible for discovering, valuing, and updating all taxable property including real estate, motor vehicles and personal property in the Town of Colebrook. After the Grand List of taxable property is finalized in January, the budget process begins, finishing with the establishing of a mill rate. The mill rate for the 2021 Grand List is 32.25.

No longer own your motor vehicle?  Please click here to find out what is required to obtain a tax credit (if applicable).

The Assessor’s Office also administers many tax relief and exemption programs.  Please click here for 2021 Tax Relief Programs offered by the Town of Colebrook and the State of Connecticut.  If you would like more information on these programs, please feel free to call 860-379-3359 x206 or email

Tax Relief Applications

Colebrook Grand List Grows 2.55% as Motor Vehicle Values Increase Statewide

The Grand List is comprised of all the real estate, motor vehicles, and personal property in Town and the Colebrook 2021 Grand List grew 2.55% or $4,919,752. The pandemic has had an impact on different aspects of the Grand List and Motor Vehicles in particular.

During the last two years the Assessor’s Office has seen an increase in the number of Building Permits as more homeowners were working from home, not going out to dinner or taking their yearly vacations, and as a result potentially having more disposable income and time for their home improvement projects.  Most of the increase in the Real Estate portion of the Grand List, $277,535, reflected a trend where much of the increase came through residential remodeling and home improvements.

Motor Vehicles have seen the greatest increase and this is not unique to Colebrook. Colebrook’s Motor Vehicle Grand List grew more than $3,264,120. It is well known that motor vehicle values have surged across Connecticut and nationwide.

Increased values can be traced directly to the pandemic eruption in March 2020. Auto plants suspended production to try and slow the spread of the virus. As sales of new vehicles sank, fewer people traded in used cars and trucks. At the same time, demand for laptops and monitors from people forced to stay at home led semiconductor makers to shift production from autos, which depend on such chips, to consumer electronics. When a swifter than expected economic rebound boosted demand for vehicles, auto plants tried to restore full production, but chip makers couldn’t respond fast enough. Also add that rental car companies and other fleet buyers who were unable to acquire new vehicles, stopped off loading older ones. This compounded the shortage of used vehicles. The supply of used cars shrank so drastically, that basic economics took over, pushing the “in demand” prices higher. As bleak as the market is for used car buyers, the computer chip shortage has also driven new vehicle prices higher. It’s a ripple effect with supply and demand the driving factor.

The Assessor’s Office also saw an increase in Business Personal Property as that portion of the Grand List grew over $1,378,097. The increase in Personal Property also seemed to be tied to the pandemic. The businesses that were able to survive and somewhat thrive during the pandemic were able to experience profits and purchase new equipment.