This modern dog house named Woof Ranch, features a deck covered in artificial turf as well as a small window in the interior of the house to create the indoor/outdoor experience often associated with mid century modern houses. --adapt for cat patio
indoor/outdoor shower---a large section of the glass wall pivots to allow outdoor bathing on a whim. additionally, the exterior shower can be accessed fro the yard (as demonstrated). I love the picturesque beauty of this wide-open space!
Architectural Designs House Plan has an open floor plan and indoor/outdoor living with the back wall of the great room collapsing creating an enormous continuous space that flows to include the covered lanai - and pool if you build one - together