I don't think there are any wooded lots in Germany, at least not in the way you're thinking. If your lot is at least a quarter acre big and some 30 feet wide, it counts as a forest.
A quarter of an acre of trees is a "forest"? Whoa. As someone who grew up amidst a thousand miles of trees, I shall be laughing for a week to myself over such an idea.
Of course, your typical forest is bigger than that even in Germany. This is the minimum size a piece of land with trees on it has to have to be considered a forest by law.