I find things like this fascinating:
See that house there? That’s the Dream House that Mr. Blandings built. Seriously!
When they filmed “Mr. Blandings Builds His Dream House,” in 1948 they built an actual, practical house on the Fox Ranch (today it is Malibu Creek State Park). The house was built at 7/8 scale in order to make Cary Grant appear taller, and the interior walls are “wild” — moveable — to allow for flexibility in filming.
Before the Fox Ranch was converted to a park, the same house was used for the plantation in “Roots.” Today the house still stands at the entrance to the park, where it is used by the park rangers as an administrative office.
They don’t build film sets like they used to, eh?