These plans are very detailed and include professionally rendered measured drawings, a list of materials for the entire project...including the ladder and balcony...and clear instructions that guide you through the project. The structure is meant to serve two purposes: a playhouse fort for the kids, as well as extra lawn tool storage for you. At 12' x 12', there is plenty of room for shelving and storage in the downstairs area, while upstairs can be designated for the kids' backyard playhouse -- or use it however you like, very versatile. Both frame flooring and concrete slab options are discussed.