Here is our catrun that we built and was finished in august 2012. The electricity is done, two boxes for the males so they can go outside when they want to. The roof is by a big net and the size is 10×12 m2.
They have catdoors to connect the catrun with the house so they can choose if they want to stay ouside or inside depending on the weather. Outside they have a lot of bushes to hide in. Inside they have places to sleep on, food & water and cat toilets of course.