We built this to go right next to our stairs. The run has hardware cloth on 3 sides and then the side touching the stairs opens up to under the stairs so they have a bigger run.
We extended the floor so that it went all the way to the nesting box. We will be adding a nesting box to the wall by the cleanout doors rather than where the plans put the nesting box. We like that this gave us more square foot per chicken on floor space. Due to this change though we had to use interier hinges so the floor could slide in and out easily. We also added a door to the bottom so the coop could be locked seperately from the run.
I wanted to turn the space where the planter box is into a storage space and may still do that later to store food, clean out supplies, and first aid supplies. We'll see!