It took a moderate amount of time to assemble...the instructions are a tiny bit confusing at first but I figured them out. I needed to have my partner help me when putting the doors on. I assembled them slightly wrong because again, the directions were a little confusing in conjunction with the holes in the wood. It still works fine so I don’t mind. All put together it does look great and keep the litter inside. My cat kicks litter allll over the place and so far this cat house has kept it in.