The office comes with 5 walls- you choose which front you want and 1 has to be cut apart if you use it. Instructions say to cut down the side walls but I wanted a business so I left the walls long. I had to make my own roof and I used heavy cardboard and painted it red. Be sure to square the walls or you can be off and then the actual roof will not fit right. Enjoyable project. I did have to clip the top corners to be able to butt the joints together. Many uses for this great priced add on office/showroom kit.