Staten Island-based property owner James Mangone has filed applications for two three-story, two-family houses at 370-374 Crystal Avenue, in Westerleigh. That’s a neighborhood just north of CUNY College of Staten Island. Each of the buildings will measure 3,459 square feet. In both, there will be one unit on the ground floor, followed by a second unit on the two upper floors. They should average 1,198 square feet apiece, indicative of family-sized apartments. Each will come with a single-car, 297-square-foot garage. James V. Morri’s Staten Island-based architecture firm is the architect of record. The 8,000-square-foot plot was occupied by a single-story house until that was demolished earlier this month.