Assessor's Office
Office Hours
Monday, Wednesday, Thursday
8:30 a.m. - 4:30 p.m.
Tuesday
8:30 a.m. - 7:00 p.m.
Friday
8:30 a.m. - 12:00 p.m.
Welcome to the Assessor's Office!
The Assessor is responsible for the discovery, listing and valuation of all taxable and non-taxable property located within the Town of Portland annually as of the October 1 Assessment Date. Real Estate, Personal Property and Motor Vehicles are assessed at 70% of fair market value and values are determined by using uniform, fair and equitable appraisal methods legally prescribed by law.
2026 REVALUATION UPDATE
November 10, 2026
NOTICE OF 2026 Revaluation Assessments have been sent to residents
The 2026 assessments are 70% of Real Estate Fair Market Value as of October 1, 2026
DO NOT calculate your new assessment using the current Mill Rate.
The July 1, 2027 tax bills will be calculated using a new, yet to be determined Mill Rate to be set this Spring during the budget referendum.
We encourage homeowners to check assessment data using the online "Assessor Database" Any omissions or data errors may be reported directly to Tyler Tech or the Assessor's Office.
2026 Real Estate Sales Info
Tyler technologies will be conducting informal phone hearings to answer and address any valuation concerns throughout the coming weeks.
To schedule a phone hearing: (888) 644-1581
Or schedule an appointment online at
Veteran Tax Exemptions
Honorably discharged Veterans that have served at least 90 days during a time of war must have their DD214 filed within the land records on or before October 1, 2026. Disabled Veterans and/or low-income Veterans over 65 years of age must bi-annually file to the Assessor on or before December 31, 2026 to receive additional exemptions. Veterans with service-related, permanent & Total 100% disability ratings must annually apply for tax exemption on or before January 1st.