This photo of the actual Bridgewater House, on the site of Cleveland House, is on Flickr, taken by jupiter1953.
https://www.flickr.com/photos/b1953/7616519714
I first watched the 1981 Brideshead at Judith Holliday's apartment in the Dewitt Mall Apartments in Ithaca. My then boyfriend Randy and I went over every Sunday night while it was on Great Performances on PBS. I had not had a television and bought a modest black-and-white television so we could watch the series. Randy also did not have a television. Judith had a color TV and it beat out my B&W model. I took along my copy of the book and it was amazing (and surprising) how much of the dialogue in the book made it into the telescript.