I built a low-budget sukkah this year.
The dimensions are 1x2x2 m. The walls are the side of the stair area, the wall and door of the building (that door is usually locked; people enter and exit through the left-hand half), and the 40cm x 1m wall of packing tape on the left. Some additional packing tape connects the two walls: there is less than a 3 t'fachim distance between the walls at the top and at the bottom, but potentially more at the top egde of the packing tape.
A strip of packing tape holds up the schach. Note the extensive decorations over the far wall (the principle of "gud asik," or "pull and ascend," stipulates that a wall of sufficient height is viewed as reaching the schach above).
Books, drinks, tissues, bedclothes, and other assorted items make my stay in the sukkah as homey as possible.
I have a chair, a table (doubles as another chair) and a mattress.
Me in the sukkah. Note the extensive decorations above my head. The blue plastic wrap visible descending over my left side marks where the sukkah is covered by a tree overhead; only the part between there and the door behind me is definitely kosher. On the far right is a disposable tablecloth I taped up to give me some privacy from people passing by on the street below. Excuse the sandals with socks; I don't know what I was thinking. Actually, I know that I was thinking when I got dressed that I wouldn't be photographed.
A close-up of the top corner of the sukkah. Note the odd angle.
This rock is keeping the sukkah from falling over.
Many thanks to Yair Hakak for helping to build the sukkah (especially pointing out the need for the rock, and donating the fabric) and to Noa "Resi" Hirsch for taking the pictures.