I was able to assemble it by myself and without tools (and I'm not particularly a crafty old lady!). I am thrilled to have spent to little on a starter greenhouse.  If I see it being as useful as I hope, I'll definitely have to upsize, but for the price, I am thrilled with the purchase.  If assembling- be aware that the squares should be rectangles in that first and second drawing.  Pay attention to that and your assembly will go quickly and easily.  I couldn't believe how easy it was to put the roof on it!