limiting local authority to adopt restrictions on the building and development of residential properties.

HB 410 requires New Hampshire towns and cities to justify certain zoning restrictions on residential properties using scientific evidence from non-partisan sources, rather than arbitrary rules. It defines "extraordinary restrictions" as those exceeding specific thresholds, such as lot sizes over 5 acres per unit, minimum home sizes over 200 square feet, or fees exceeding $100 for low-income homeowners. Residents affected by these restrictions can appeal to their local zoning board, which must pause enforcement while reviewing whether the evidence meets the bill’s standards. The law aims to limit local government authority over housing development by mandating evidence-based decisions and creating a clear appeal process.