I have constructed my own private observatory in early 2009. It is located in my backyard about 30 meters away from my house.
The observatory is 3m x 3m with a roll-off roof. Once opened, it offers an unobstructed view of almost the entire sky.
It used to house an Meade 10" LX200GPS, but now it houses a Robtics 8" Ritchey Cretien telescope with a carbon tube on a NEQ6 Pro mount.
Also I have a William Optics Z80 refractor and the Coronado PST solar scope.