Fairfield, NY Sheds, Carports, Garages and accessory dwelling Units for Sale Sheds for sale in Fairfield, NY have an average price of $6513.33 with an average square footage of 133. The average cost per square foot is $48.85. ShedHub.com is aware of 1 dealers within 20 miles of Fairfield NY. The most popular shed styles at these locations are High Barns, Mini Barns, and Garages.