Underwood-Petersville, AL Sheds, Carports, Garages and accessory dwelling Units for Sale Sheds for sale in Underwood-Petersville, AL have an average price of $15406.00 with an average square footage of 456. The average cost per square foot is $33.79. ShedHub.com is aware of 1 dealers within 20 miles of Underwood-Petersville AL. The most popular shed styles at these locations are High Barns, Mini Barns, and Garages.