Here's proof that you don't always need loads of money to create your own little getaway....
Above: This one's meant for clubhouse, or kid, use, but when I saw the photo of this simple little structure, I thought "Now wouldn't this make for a cool little room dividing office within a house?".
Add some shutters, a little door, and voila!- privacy, and semi-isolation, when you need it- for reading, studying, or whatever other use.
Some other ideas...
