A New York-based real estate firm is under contract to purchase the prime redevelopment site at 450 3rd Avenue North on the east side of Mirror Lake in downtown St Pete. Located at the corner of 5th Street North and 3rd Avenue North across from the historic Mirror Lake Community Library, the 0.94-acre property was previously approved to be developed into 23-story mixed-use tower containing 285 apartments and 10,000 square feet of retail space.