12-14 Union Street This listing is 12-14 Union St. The 12-14 Union St is a 3 story building with 1512 sqft each floor and sits on 0.17 Acre of land. The property is located in the center of the City of Middletown. The zoning of the property is DMU (Down Town Mixed Use), so the 1st floor is commercial and 2nd floor and above could be commercial or residential. With a large property in the center of town, you could develop many residential units. The requirement for residential unit is a minimum of 750 sqft per unit. The parking requrement is 1.7 parking space per residential unit.