SUPER easy to put together. Granted I had a second person and we've been putting together a few pieces of furniture lately, but I still found this to be the easiest to put together. It's really great quality and I was impressed by the size. Fits the larger litter box that we have and still have space with the divider in place where we can keep extra litter and supplies (I was surprised it fits our large, square bucket of tidy cats litter.)