Brooklyn-based Kazzak Realty has filed applications to build a four-story, seven-unit residential building on the vacant portion of 490 Humboldt Street, in northern Williamsburg, located seven blocks north of the Graham Avenue stop on the L train. The new 7,751 square-foot building would be built on an irregularly shaped lot adjacent to an existing three-story, three-unit mixed-use building. The new structure, which would have a rooftop terrace, would have 6,032 square feet of residential space, with average units of 862 square feet apiece. Part of the existing structure, specifically the single-story rear portion, will be demolished. Brooklyn-based Philip Toscano is the architect of record.