Actually, it was the latest creation of Kate, our youngest (nearing 8). She made the house with almost no supervision (super genius)!
(I wonder, if more fairies move in and build houses, they'll suddenly make a fairy HOA?)...
*UPDATE, WITH "FOR SALE" SIGN!*
Kate just added two signs, letting all in the fairy world know that there's a great new house for sale in a great neighborhood... (the one on the fence reads, "for sale mansion.")