It isn't a tourist site, even though the name sign has hours listed. It's the administrative office of the Ancient Plovdiv Municipal Institute, whose sign on the door says, "the house is NOT a tourist site." The house is къщата на хаджи Власаки Чохаджията

Attached photo(s):
https://streetcomplete.app/p/346888.jpg
https://streetcomplete.app/p/346889.jpg