Motorhome Garage
My MH garage dimensions are 50 feet long and 18 feet wide. The inside ceiling is 16 feet high. The door is 12 feet wide and 13 feet high (the door header gives 13 feet overhead clearance). Inside ceiling height is 16 feet. The sewer drain is 18 feet back from the overhead door so it is in close proximity to the coach sewer drain. There is one 50 amp and one 20 amp electric socket on their own breakers along with water so I have water, sewer and electric inside the garage (full hookups). I have a 30 amp electric connection and water at the outside rear of the garage. This is so I could install an air cooler (swamp cooler). There are 12 two-tube florescent lights around the perimeter of the ceiling about 3 feet in from the wall. Do NOT put them in the middle of the ceiling because you will get poor lighting if you do because the height of the MH will block the light. The overhead door is insulated with styrofoam insulation. The garage is insulated. There are three windows on each side of the 50 foot length. The MH garage is connected to the car garage with a 9' X9' opening and we can enter the house from the car garage.
If I were doing it with more space on my lot I would make it 60 to 65 feet long in order to have more storage space at the front of the MH. Also, it would add value at resale if the purchaser had a 45 foot MH. Even though there is plenty of room to open the slide outs and walk around them I would make it 20 to 22 feet wide. If you think that a Prevost owner might ever buy your property, should you sell it, make the overhead door clearance 14 feet because the newest Prevost MHs with a dome type satellite dish require 13 feet 5 inches of clearance. The bottom line is make it larger when you first build it because it is MUCH more expensive to modify it later.
JerryF