This bill introduces a new section to RSA 674, specifically addressing zoning ordinances related to single-family residential uses and their associated acreage requirements. It prohibits municipalities from mandating larger lot sizes than necessary for community health and safety, particularly in relation to sewer infrastructure. For lots not serviced by municipal or community sewer systems, the bill stipulates that lot sizes cannot exceed what is required by the Department of Environmental Services for individual sewage disposal systems, unless the municipality can provide empirical evidence demonstrating that larger sizes are essential for community health or safety. For lots serviced by municipal sewer systems, the maximum lot size is set at 22,000 square feet, contingent upon adequate sewage system capacity.

Additionally, the bill clarifies that the new requirements will not affect the development potential of lots created before July 1, 2025, and it does not override existing municipal zoning regulations unrelated to minimum lot sizes. The act is set to take effect on July 1, 2025. The fiscal impact of the bill is indeterminable, as municipalities may incur costs related to amending local zoning ordinances and gathering necessary empirical evidence to justify any deviations from the established lot size requirements.