Right now, the pen is in front, uphill from the coop itself. That caused problems with mud and drainage, etc. And they always tilled the dirt and leaves up against the building. The dimensions of the old pen are approx 20 x 22 (original pen was 11x 20, then added a section to it when we added onto the coop to double that space) The new pen will be behind the coop, downhill to the perimeter livestock fencing that surrounds about 2 acres of the property. We are raising the height of that back fence (from 4 ft to 7 ft) by hanging welded wire fencing on a multi-strand cable between two trees; it has a turnbuckle in the middle to keep it tight. We finished extending the height of that back approx 50' long section. The sides will be about 27' on one side and over 50' on the other side, and the coop side will be maybe 35 ft long inc the 20' footprint of the coop itself, though we only paced it off, didn't measure exactly. Here is the back fence. My property line is on down the embankment to the middle of the dirt road that surrounds my place. I have neighbors with a dog on that side, so we will also add predator proofing to the bottom all around after the actual pen is complete, along with the two gates, one on each side. Here is the current pen and then the start of the new one in the next pictures: This is the area that will be fenced; now, they can get underneath the coop even when they're not freeranging.