Here's pictures. The veranda is a scrap piece of birch plywood, 27"+- front to back, and 34"+-, it's not square so it's an eighth to a quarter inch different depending on where you measure! All I did was sand the corners. It's resting on two 2x2" 's under it, and is snug up against the Cube, on the ladder tubes too.
Yup I have a Cube run length of ~9 feet.
What you're also seeing are the greenhouse frames (one broken) so I can walk through and around the Cube comfortably, with strong aviary netting on them and tarps and sun shade mesh hung from the underside. This setup is the summer setup, aviary netting, WIR doors open and one panel lifted. They have a big area further back shaded by trees with one greenhouse frame and then fence poles holding up aviary netting. Perimeter electric fencing around all.
In winter the panel will come down and the doors usually closed, certainly if I remove the fencing and netting for expected heavy snow, it is necessary for predators. I still have to hardware cloth this WIR run along the bottom. This is why I like the security of the Cube at night, in case anyone gets through.
Here is the best view of how far the porch and the ladder extend:
I wouldn't go much deeper because it's nice to be able to reach over the veranda to the doorway if you ever need to.
Here is the underside to give you an idea of how I did it. The veranda board is not actually attached to anything. I think the ladder and the Cube against it and it's own weight keep it from shifting. It's good like this, I easily lifted off the ladder and then the board, and unclipped the 2x2 's when I shoveled out & replaced the litter under the Cube a while ago and washed everything (due to Northern fowl mites, I seem to get them once a year here).
You can barely make out the eye screw on the underside of each 2x2 end which the zip tie goes through
I didn't have 1x10 boards under the Cube holding litter in because there used to be wheels there.
Here's Annie (Buff Orp) telling me she's thinking of laying her egg soon, she kept talking to me and jumping up and down and going in, and there's Hazel (Buckeye) wondering what I'm up to also.