Munster Houses & Psycho House

Are there three Munster Houses: One for Marian Seldes & Dana Delany. One for the
Gilmore Girls & The Dukes of Hazzard & the one for Mary Crosby ?

In the episode with Ron Liebman & Ron Glass. There is an interior for the Psycho House,
remember, Liebman's character was found dead in the living room of the Psycho house.

There's this: Remember, Jessica went up the stairs in the house, she looked out the kitchen
window after trying to turn the water on.

So how is the Psycho House a façade ?