I built mine a year ago this month....it is 16 by 16, has an 8foot deep porch, and a 8/12 pitch roof. Its built on a slab. I used 2x4 framed walls and t-111 siding, insulated walls and cieling. The cieling is a vaulted ciling with a pan at 12 feet. I had the drywall mudded and taped but I did the rest. Its wired for power but I have not run the power in. I can hook up or a solar/inverter battery to run a couple lightbulbs. Its heated with a wood stove