Based off of the upper part of Hotel Hightower from Tokyo DisneySea.
Many of the rooms are unfurnished and one floor of the mansion has no rooms.
Progress:
1st floor/Lobbies: 90% Walls, 70% Furniture
2nd floor: 10% Walls, 5% Furniture
3rd floor: 80% Walls, 70% Furniture
4th floor: 70% Walls, 15% Furniture
5th floor: 90% Walls, 80% Furniture
Attic: 40% Walls (and floors), 40% Furniture

I started this in June 2019, and abandoned it from December 2019 to May 2020. I abandoned it again from August 2020 to January 2021. I will be updating this page as I continue building the interior.

Room List:
1st Floor: Front Lobby, Rear Lobby, Museum, Pool, Changing Rooms, Prayer Room, Stairway Landing
1 1/2th Floor: Presentation Hall
2nd Floor: Kitchen, Dining Room, rest is empty
3rd Floor: Library, Conservatory, Small Office, Farm Room, Movie Theater and Theater Lobby, Game Room
4th Floor: Chapel, Art Room, My Sister's Room, Ballroom
5th Floor: My Room, Gift Shop, Grand Staircase, Balconies, Mother's Room, Banquet Hall, Den, Chapel Mezzanine, Bible Study Room, Machinery/Lab
Attic: Lots of tunnels that lead throughout the mansion and to secret rooms, also a bunch of junk
Roof: Rooftop Garden and Parrot Habitat

I did not use any 3rd party tools. This was all built by hand in Creative mode.