So I spent some more hours into this (Edit: Baroque revival) house. Here's an update:
(Watch my other submissions for more pictures of this Mansion)


350+ rooms:

Basement guests:
28 parking spots
2 Large Rooms/hall
1 Restaurant
6 bathrooms
1 Kitchens
storage room

Basement crew:
99 bedrooms 198 beds
99 full size bathrooms
2 kitchens
2 dining rooms
1 large supply storage
6 bathrooms
1 laundry room
2 recycling spots

Basement maintenance:
Laundry room
Power plant
cargo loading deck
main supply storage room

Ground floor guests:
indoor garden
Ball room
24 bathrooms
piano bar
hangar
5 kitchens
restaurant
storage
Lounge room
small lounge room
art gallery
Guest bar area
Pool room
4 full bathrooms
swimmingpool
dining room swimming pool

Ground floor private:
5 bathrooms
Library
Dining room
Living room
Wine cellar
kitchen
meeting room
office

First elevation guests:
ball room with stage
backstage area with bathroom
4 guest rooms
4 full sized bathrooms
tennis court

First elevation private:
bar with storage
library
bathroom
master bedroom
master bathroom
his and hers walk-in-closet

Second elevation guests:
3 guest rooms
Swimmingpool
Garden with bar
basketball court
4 bathrooms

Second elevation private:
-

Third elevation guests:
3 guest rooms
Cinema
bowling alley
Observatorium

Third elevation private:
-

Fourth elevation private:
4 bedrooms (under construction)