Channel Islands Beach, CA Sheds, Carports, Garages and accessory dwelling Units for Sale Sheds for sale in Channel Islands Beach, CA have an average price of $20134.50 with an average square footage of 120. The average cost per square foot is $167.79. ShedHub.com is aware of 2 dealers within 20 miles of Channel Islands Beach CA. The most popular shed styles at these locations are High Barns, Mini Barns, and Garages.