relative to acreage requirements and zoning regarding sewer infrastructure and single-family residential uses.

HB 459 sets new limits on minimum lot sizes for single-family homes based on sewer infrastructure. It prohibits local zoning rules from requiring lots larger than necessary for health/safety (determined by state environmental rules) for homes without municipal sewer, and caps lot sizes at 22,000 square feet for homes with municipal sewer - unless a town provides scientific proof that larger lots are needed for community health or safety. The bill directly affects municipalities that set zoning rules and developers or homeowners building single-family homes in areas with specific sewer systems. It takes effect July 1, 2025, and does not apply to lots created before that date.