Some Park Slope residents fear they may lose their options for affordable food if their local supermarket shuts down.

The Key Food supermarket on Fifth Avenue may be divided to accommodate multiple uses, if an investment firm has its way.

Avery Hall Investments has proposed retooling the site for rental apartments, including 25 percent affordable housing, and smaller retail spaces.

Local officials blasted the city's Department of Housing and Preservation Development for sending a letter to the developer that made no mention of maintaining a supermarket at the site. The letter also left room for the developer to modify the ratio of affordable housing, officials say.

Avery Hall says the finalized project would "carry a broad selection of goods at a variety of price points that will appeal to all shoppers to replace the existing Key Food." The developer also says it's sensitive to the need for affordable housing.

The plan has not yet been approved by the city.