Snuffy,
We used to store our unit at the local storage facility but she took a beating those first two years so when we decided to build our house, it was determined that we would construct some sort of garage for the RV.
We got our house & "barn" plans from CoolHousePlans.com at the same time. Sure made it easier to find a builder when he saw the $$$$ rolling in his head!
Here are our
plans, but there is an RV garage section on their website with different layouts. We upgraded to a 16 foot door which results in 18 foot to the bottom of the ceiling joists so I can "stoop" up on the rig's roof. The other bay holds my T/V and tractor. We have 30 & 50 amp hookups along with water. DW calls it my "Million Dollar Doghouse!"
We have the deed restrictions that BlueGrassMan mentioned earlier. I had my eye on a Morton Building System that the neighbor parks his Kenworht Semi with 48 foot dropdeck in, but the approving "committee" wouldn't sign off on it.
Attached are some external shots of the buildings and one of the old Rage'N inside. She was 12'7" to the top of the A/C unit and was parked on top of 2x10 planks. She had no slideouts so thankfully the 3210 only has them on one side. A slight adjustment in the parking location and we can open them up with 4 inches before hitting the wall.
This year I plan to insulate the ground floor and add lighting to the walls in the RV bay. When the rig is in there, the ceiling lighting is terrible.
An equally important aspect to selecting a garage or storage shed is to visualize where and how it will sit so you don't have a stroke the first time you attempt to park your rig. With the Rage'N, it only took two adjustments and in she went. The Cyclone, with her 3 axles and extra 6 feet in length, really put the hurtin' to me the day we brought her home. The Groundhogs were poppin' up to see where those expletives were coming from!
Good luck!