
The Müller Villa is one of the most authentic and most completely preserved of Adolf Loos' works, not only in its residential and representative spaces but also in its private spaces, such as the bathroom, lavatory, kitchen and bedrooms. The service areas of the house also survive: the laundry room, cellars, boiler room, garage etc. (
http://www.mullerovavila.cz/english/pruvod-e.html)
The facedes are showing as:

Inside, the Villa Muller is at once more traditional and more original. The materials are warm, rich and comforting, and the furniture a deliberately eclectic mix of traditional styles. The client is not required to conform to some all-consuming modern lifestyle. On the other hand the spatial planning of the building is where Loos was most innovative. (http://www.galinsky.com/buildings/villamueller/index.htm)
As Adolf Loos own viewon the Rumplan of the villa:
My architecture is not conceived by drawings, but by spaces. I do not draw plans, facades or sections... For me, the ground floor, first floor do not exist... There are only interconnected continual spaces, rooms, halls, terraces... Each space needs a different height... These spaces are connected so that ascent and descent are not only unnoticeable, but at the same time functional.
The complex and rich interior allows masters and servants enter the villa seperately with respection. And there are a few level changes inside the villa to make the space be more functional and seperately used. The pictures followed make a sense of how the space is organised:
The Corridor
The Mail Hall



The Dining Room

The Kitchen

The Children's Room

The Bedroom

The Lady's Dressing Room

The Gentleman's Dressing Room

The Hall and The Cloakroom

The Library

The Boudoir

The Bathroom
The Garage

The Terrace