A long abandoned triangular property bounded by Canal, Watts, and Greenwich Streets could soon be transformed into a seven story condominium to be known as 475 Greenwich. The project, which required and received a zoning variance to allow residential units, will have 21 apartments and ground-level retail space. Greenberg Farrow Architects designed the rare freestanding structure. The western stretch of Canal is slowly being refinished piece by piece. The newly rebuilt Canal Park at West Street was recently opened, and another pocket park is to be created on the vacant strip of land to the east bound by Varick, Canal, and Laight Streets. The city may need to erect new signs for Canal Street truckers: Caution Real Estate Brokers Crossing.