Brooklyn-based SPB Realty has filed applications for a three-story, 10-unit residential building at 560 19th Street in Windsor Terrace. The structure will measure 10,931 square feet and its residential units are expected to average 828 square feet apiece. It’s unclear whether the apartments will be rentals or condominiums. The application comes after the same architect, Brooklyn-based Bricolage Designs, submitted plans next door, at 564 19th Street, for a similar project a little over a year ago. Those plans, for another three-story, 10-unit residential project, have since been approved by the Buildings Department. As for 560 19th Street, a single-story warehouse must first be demolished. The 15th Street-Prospect Park stop on the F and G trains is seven blocks away.