Harrison, PA Sheds, Carports, Garages and accessory dwelling Units for Sale Sheds for sale in Harrison, PA have an average price of $5454.75 with an average square footage of 180. The average cost per square foot is $30.30. ShedHub.com is aware of 1 dealers within 20 miles of Harrison PA. The most popular shed styles at these locations are High Barns, Mini Barns, and Garages.