Public Disclosure of Tax Valuation

The Groton Assessor’s office has been conducting the FY 2027 Quinquennial Revaluation as required by Mass. State Law. This update of values ensures that all property is assessed at full and fair market value as of January 1, 2026. The Assessor has received preliminary certification by the Mass. Dept. of Revenue. Public Disclosure period will be available to the public from Monday, October 5, 2026 through Friday, October 9, 2026 during business hours.
The revaluation requires the verification, analysis and use of at arms-length sales from calendar year 2025. Sales from the year 2024 were used to value property when the numbers of 2025 sales were insufficient for analysis. Market trends may indicate that different property types may change in value more or less than other property types.
| FY2027 Residential | |||
| Class 101
Single-Family Home |
Class 102
Condominiums |
Class 111 & 112
Apartments |
Class 104
Two-Family |
| 5%
Average Increase |
4%
Average Increase |
5%
Average Increase |
2%
Average Increase |
| FY2027 Commercial/Industrial | |
| Commercial | Industrial |
| 1% Average Increase | 4% Average Increase |
These figures represent overall market trends. Individual parcel valuations may vary from the average class increase due to typical differences, data updates, corrections, new construction and the effect of market trends for specific characteristics.
The preliminary assessed values for FY 2027 will be available for public review beginning Monday, October 5, 2026 through Friday, October 9, 2026 at the Assessor’s Office, the Groton Senior Center, and the Groton Public Library and on the Assessors web page of the Town of Groton website. Property owners are encouraged to review their preliminary assessed value and property card information. If a property owner believes the information concerning their property is incorrect, please contact the Assessor’s office.
Please note these are preliminary values and are subject to final review and certification by the Department of Revenue.
| How to review your Preliminary Assessment? | Contact the Assessor’s office |
· The Town of Groton Assessors page at https://www.grotonma.gov/government/departments/assessors/ |
Phone– (978) 448-1127
Email – assessors@grotonma.gov Location– 173 Main St. Groton, MA 01450 Hours: Monday 8:00 AM – 7:00 PM Tuesday – Thursday 8:00 AM – 4:00 PM Friday 8:00 AM – 1:00 PM
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Contact the Assessors’ office during the public disclosure period to ask questions, review, discuss your properties proposed values.