as a set for another show? It doesn't look familiar, but I thought I would ask.

Yes, the Stone house was located on the Columbia Ranch backlot in Burbank which also contained the I Dream of Jeannie/Father knows Best house, the Hazel/Gidget house, the Dennis Menace house, the Partridge Family house and of course the Bewitched house. And Columbia studios did use each of these interior sets on other shows at the time than just the featured show for that particular house.