I built a platform for it out of pressure treated lumber and exterior plywood, leveled this platform, and built the shed on top of it. This assured me of a level, sturdy surface .The crucial part of construction of this little shed is the floor build. Every piece is marked, either with a sticker or an etched in number/ letter the floor piece is just a plastic corrugated panel, like the rest of the shed. If you try and lay it on the dirt or gravel, your shed will twist and never be sturdy. In addSee full review