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Assessor
Tax Bills:
2024 Mill Rate 16.23 (assessment x .01623 = tax bill)
Questions regarding Tax payments and due dates can be directed to the Tax Collector at x217 & X216. Questions regarding Real Estate Assessments, Motor Vehicle adjustments or mailing address changes please call the Assessor's Office at X218 or X219. Board of Assessment Appeals will be meeting Sept 16, 2025 4:30 PM - 5:30 PM. Please see Board of Assessment Appeals link.
Assessment Date of Taxable Property
The assessment date of taxable property for the Town of Old Lyme is October 1st of each calendar year.
Per Connecticut State Statute Section 12-62(b) Revaluations of Real Property occur every five years; our next town-wide revaluation will be October 1, 2029. Our last revaluation was completed for October 1, 2024.
For any questions in regards to the following exemptions and benefits please contact our office at 860-434-1605, ext. 219.
Field Cards
Field Cards and maps can be emailed, there is no fee for electronic field cards. In-office services have printing fees of $0.50 cents per page, field cards are $1 per.
Please Note: All requests for historical field cards for zoning applications must be made in writing, cards will be emailed within 48 hours or as time allows. If printed cards are requested there is a $1 fee per copy.
Notable Deadlines:
The Assessor would like to inform residents of the following important dates and deadlines. All forms and proofs unless noted must be filed in the Assessor’s office located at the Town Hall.
Personal Property Deadline
Filing Period November 3, 2025
LEGAL NOTICE
To All Persons Conducting Business in the Town of Old Lyme
Pursuant to Section 12-40 of the Connecticut General Statutes, notice is hereby given that all persons conducting business in the Town of Old Lyme must file with the Assessor’s Office a complete and accurate Declaration of all taxable personal property used in the conduct of your business as of October 1, 2025.
Personal Property Declarations have been mailed out to persons known to be conducting business in the Town of Old Lyme. Whether or not you have received a Declaration, such Declaration must be filed or postmarked (as defined in C.G.S. Sec. 1-2a) no later than Monday, November 3, 2025.
Active Duty Service Members
Under the Federal Servicemember Civil Relief Act persons on active duty must present to the Assessor a current earning and leave a statement or a letter from their Commanding Officer along with a yearly application for exemption. Any Service member on active duty claiming Connecticut as their legal residence must file prior to December 31st.
Active Duty CT Resident form or Active Duty Non-Resident form -permanent address as shown on military records is out of the State of CT
Veterans
New Property Tax Exemption for Veterans With a 100% P&T Disability Rating - Effective October 1, 2024, updated October 1, 2025.
Connecticut residents who served in the Army, Navy, Marine Corps, Coast Guard, Air Force, or Space Force and have a service-connected 100% permanent and total disability rating, as determined by the U.S. Department of Veterans Affairs (U.S. DVA), are eligible for the exemption.
The law fully exempts from property tax either (1) a dwelling the veteran owns and lives in as his or her primary residence or, (2) if the veteran does not own a dwelling, one motor vehicle he or she owns and keeps in this state. If the veteran owns neither a dwelling nor a vehicle, the exemption may be applied toward one that belongs to, or is held in trust for, his or her spouse if they live together.
NEW FOR 2025 Section 235: Section 12-93 new language - Effective October 1, 2025 and applicable to assessment years commencing on or after October 1, 2025.
In the case of any person claiming exemption under subdivision (83) of section 12-81, such claimant shall annually, not later than January first, submit such claim to the assessors for approval, on an application form prepared for such purpose by the Secretary of the Office of Policy and Management and to be used for assessment years commencing on and after October 1, 2025, which submission shall include (1) all documentation necessary to demonstrate that the resident described in subparagraph (A) of subdivision (83) of section 12-81 has been determined by the United States Department of Veterans Affairs to be permanently and totally disabled based on a service-connected disability rating of one hundred per cent, and (2) an attestation that such claimant has not submitted, and will not submit, a claim for the exemption under subdivision (83) of section 12-81 in another town.
FAQ on the New Property Tax Exemption for Veterans With a P&T Disability Rating
D-2-100-%-Permanently-and-Totally-Disabled-Application