:)
I wonder if it’s still a private residence...
It was a vacation house for the Kaufmann family until it was donated to the Western Pennsylvania Conservancy in 1963. Major structural reinforcement was done in 2001-2003, with the retensioning and reanchoring of the sagging cantilevered concrete beams, at a cost of some $11 million.
Extensive waterproofing was also installed, but because of the site's dampness and some of the deficiencies in the original design (such as the lack of roof flashing and internal drains), the maintenance contractors, and their descendants, have got jobs for life.