The board of directors of the Boston Planning & Development last week approved a residential development project for Morton Street in Mattapan.The four-story building at 775 Morton St., located on the corner of Morton and Wildwood Streets, will consist of 27 residential rental units, including four income-restricted units.

The project is expected to include two ground floor retail opportunities totaling 1,500 square feet in space. The transit-oriented project is located near the recently renovated Morton Street Commuter Rail Station. The developer will contribute $10,000 to Boston’s Parks and Recreation Department.