An Act relative to unreasonable property tax increases

This bill caps annual property tax increases for existing residential homes at 20% of the previous year's tax amount. It also prohibits municipalities from reassessing properties or imposing additional tax hikes for three years after a triggering event, such as the sale of comparable homes in the area. The law applies to homes not classified as new construction or fully reconstructed, and requires the Massachusetts Department of Revenue to monitor compliance and establish appeal processes for homeowners. Homeowners can challenge assessments that violate these limits through existing legal channels.