There are actually eleven of these little bungalows on Hollywood Way, lined up on one side of the WB Ranch (formerly the Columbia Ranch).
The eleventh is pretty far down the block from the others, which makes me wonder if there were a whole bunch of other ones that have since been torn down. On the other hand, I think you would have to be an awfully evil witch to tear any of these down. Seriously. They have built-in shelves on the outside of the house. I mean, come on.
According to the Burbank Historical Society*, these were not constructed as backlot dressing rooms or offices but to be used as ordinary homes, for normal people. Here are some of them as they look today.