This bill introduces a new section to RSA 674, allowing multifamily or mixed-use developments as a permitted use by right in certain urban municipalities. It defines key terms such as "adaptive re-use," "mixed-use development," and "multifamily development," and specifies that these developments can occur on parcels serviced by municipal water and sewer systems and zoned for commercial, office, retail, or parking uses. The bill also outlines that municipalities cannot impose certain zoning regulations on these developments, including restrictions on residential density, building height limits below 65 feet, and mandatory setbacks greater than specified thresholds.

Additionally, the bill allows municipalities to require that up to 20 percent of available ground floor space be dedicated to retail uses and permits them to regulate the siting and design of developments, provided such regulations do not create unreasonable costs or delays. The effective date for this act is set for January 1, 2026. The fiscal impact of the legislation is estimated to be less than $10,000 for each fiscal year from 2025 to 2028.