Southgate is a shopping destination located in Portsmouth, NH. As a Community Center, it occupies a prime spot at Lafayette Rd. (Rte. 1) & Constitution Ave.. Since opening in 1969, Southgate has been refreshed with a renovation completed in 2010. Shoppers can explore 225,000 sqft. of retail floor space featuring approximately 20 stores. The mall offers 1,125 parking spaces for visitors.