Clay, PA Sheds, Carports, Garages and accessory dwelling Units for Sale Sheds for sale in Clay, PA have an average price of $6165.50 with an average square footage of 150. The average cost per square foot is $41.10. ShedHub.com is aware of 1 dealers within 20 miles of Clay PA. The most popular shed styles at these locations are High Barns, Mini Barns, and Garages.