Boston Mayor Expands Property Tax Exemptions Starting 2027 for Homeowners

The mayor's office issued the implementation schedule for the expanded residential property tax exemption on July 7, directing city assessors to apply the revised formula to all qualifying single-family homes and condominiums starting in fiscal year 2027.

City budget documents approved in June require the change because assessed values have risen 18 percent citywide since 2024, pushing more households above the prior exemption threshold. The adjustment recalculates the exemption amount each January using the most recent assessment data.

Timeline for Local Households

Residents in neighborhoods such as Dorchester, Jamaica Plain and East Boston will receive notice letters in October 2026 that show the new exemption amount applied to their parcel. Actual tax bills mailed in July 2027 will reflect the lower taxable value, shifting payment amounts for the first time in the new cycle.

Local advocates note that renters in buildings with three or fewer units may see indirect effects if landlords pass along any net savings through lease renewals after the July 2027 bills arrive. The legislation states the exemption applies only to owner-occupied primary residences and requires annual re-certification by March 1 each year.

Budget Figures and Next Actions

The city budget papers allocate an additional 42 million dollars to cover the expanded exemption for the 2027 fiscal year, drawn from existing property tax revenue without new levies. Assessors will begin accepting online applications for the updated program on September 1, 2026, with decisions issued within 45 days.

City hall staff will hold four public information sessions in August at community centers in Roxbury, South Boston, Allston and Hyde Park to explain the application process and required documentation. The first revised tax statements will be issued on July 1, 2027.