DETROIT — Banner Supermarket will soon expand its store in northwest Detroit. The $5.8 million project will bring the independent grocery store located at 14424 Schaefer Highway to 40,000 square feet. The expansion is a part of the Detroit Economic Growth Corp.’s Green Grocer Project (GGP).GGP aims to improve the quality of the grocery sector by assisting grocers in addressing operational and store development needs to ensure the highest-quality fresh affordable food in Detroit stores. Detroit Economic Growth Corp. is the primary economic development agency in the city of Detroit. Upon completion, the expansion project will add a pharmacy, a bakery, a hot food deli, and a seafood counter. The renovation includes a new entrance and parking lot and landscaping improvements. The store is staying open during both phases of construction. The first phase is expected to be completed in November and the second phase early next year. The store is expected to add 25 new jobs after the expansion. GGP provided a technical assistance grant and facilitated financing through Invest Detroit, Chase Bank and a New Market Tax Credit set up by Capital Impact Partners for the project.