This bill introduces a new legal framework that permits high-density residential development on land currently zoned for commercial use. It amends RSA 674 by adding a new subdivision that defines key terms such as "high density residential zone," which is characterized by at least 20 residential units per acre, and "commercially zoned land," which refers to areas designated for commercial activities. The bill also defines "mixed-use development" as an urban development type that integrates residential, commercial, cultural, institutional, or entertainment uses within a single area.

Furthermore, the bill mandates that municipalities must allow high-density residential development on commercially zoned land, provided that the necessary infrastructure—such as roads, water, and sewage systems—is available or can be provided to support such developments. This legislative change aims to facilitate urban growth and address housing needs while ensuring that infrastructure requirements are met. The act will take effect 60 days after its passage.