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 a minimum of 20 residential units per acre, and "commercially zoned land," which refers to areas designated for commercial activities like retail and office use. Additionally, the bill defines "mixed-use development" as an urban development model that integrates residential, commercial, and other uses within a single area.

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 development. This provision overrides any existing regulations that may contradict this allowance. The act is set to take effect 60 days after its passage.