Real Estate Assessment Duties

The Assessor's Office is responsible for the valuation of all taxable property in Windham, both real estate and personal property. It is also a center of information for property owners, title companies, real estate brokers and appraisers, attorneys, and other departments and agencies in the community. It maintains historical information as well as current data about properties such as ownership, deeds, inventories of land and structures, property characteristics, and town maps. The office administers any property tax exemption programs enacted by State Legislature such as veterans, blind, and homestead exemptions. The assessing staff continually updates assessments to reflect new construction, additions and demolitions.   

2023 Tax Rate

On August 15, 2023 the Town Council set the property tax rate for the 2023-24 tax year at $11.20 mils ($3.96 Municipal, $6.76 School, $0.48 County) with a certified assessment ratio of 100%. Windham has 9,070 Real Estate accounts and 1,200 Personal Property accounts with a combined taxable value of $3,788,400,000.


  1. Tax Rate: $11.20 / $1,000 for fiscal year 2023-24
  2. Due Dates: October 2, 2023 and April 1, 2024
  3. Interest Rate: 8% 
  4. Fiscal Year: July 1, 2023 to June 30, 2024 
  5. Assessment Date: April 1, 2023
  6. Commitment Date: August 15, 2023 
  7. Deadline to Appeal: February 16, 2024 
  8. Certified Ratio: 100%

Property Tax Relief Programs

There are several programs available for legal Windham residents that may help to reduce your tax burden. Please visit the links on the left hand side of this page to find out if you qualify or visit Maine Revenue Services

2022 Parcel Maps in Google Earth

You can now view an overlay of the Windham parcel maps in Google Earth. This information is updated periodically.

Note: Parcel boundaries are intended to be used for the purpose of property assessment and should not be considered survey accurate.

You will need to have Google Earth installed to view this data. After downloading and installing Google Earth click here: Windham Parcel Data 

Associated assessing data can be viewed by clicking on the lot of interest. If you save this as one of your places (under the File options) you can reopen this information without having to revisit the Windham website. Please be aware that some information has been suppressed at the property owner's request.