Middlesex County Assessor Office

Find Middlesex County Connecticut assessor, assessment, auditor's, and appraiser's offices, revenue commissions, GIS, and tax equalization departments. Assessors provide information on property and land tax assessment, property listings, values, valuations, property search, and records.


Cromwell Assessor 41 West Street Cromwell CT 06416 860-632-3442


Deep River Assessor 174 Main Street Deep River CT 06417 860-526-6029

East Hampton Assessor 20 East High Street East Hampton CT 06424 860-267-2510

Essex Assessor 29 West Avenue Essex CT 06426 860-767-4345

Middlefield Assessor 393 Jackson Hill Road Middlefield CT 06455 860-349-7111

Middletown Assessor 245 deKoven Drive Middletown CT 06457 860-344-3454

Old Saybrook Assessor 302 Main Street Old Saybrook CT 06475 860-395-3137

Portland Town Assessor 33 East Main Street Portland CT 06480 860-342-6795

Westbrook Assessor 866 Boston Post Road Westbrook CT 06498 860-399-3045

About Assessor Offices

What if I disagree with an assessment?

Most jurisdictions have an appeal process for contesting an assessment. While the specific rules vary from one locality to the next, the process typically involves a hearing before an assessment appeal board. Taxpayers who have concerns about their assessment should visit their local Assessor's Office or its website to learn about the appeal process and what information is required in order to appeal a property tax assessment.

How does my assessment affect the taxes I owe?

The formula used to calculate property taxes varies by location. Your assessment is one part of your property tax calculation. Your property tax payment is calculated by multiplying your property's assessed value, or in some cases half of the assessed value, by the tax rate for your location.

What is the difference between assessed value and market value?

Market value is the likely selling price of a property based on current market conditions. In some jurisdictions, the Assessor calculates an assessed value by applying a factor, for example 70%, to the market value. The assessed value is then used to calculate the taxes for that property.