Duplex for sale by owner in Niagara Falls, NY 14301. This very Large Duplex features one apartment on the first floor and one covering the entire second floor. Each apartment covers more than 1,200 sf. This duplex is located on a great lot which is right next to a wonderful city garden park that features a large, charming gazebo and attractive, well-maintained landscaping. Each apartment has two large bedrooms, a recently renovated kitchen with space for a dining table, and 1.5 bathrooms, which ... See site for full property details.