The renovation of the Müller Villa was primarily about structural consolidation and conservation of original materials. This meant protecting and treating with a restoration approach even those construction products and materials that are otherwise considered common and therefore replaceable with the same type of material (for example, white standard tile cladding in bathrooms). The restoration work focused on the restoration of preserved joinery products that are part of the building (windows, doors, floors, railings, etc.) as well as the set of built-in furniture and paneling - with veneered or varnished surfaces. Elements made of stone, metal, glass, ceramics were treated with restoration, and the conservation method was used in the case of paper wallpapers and natural mat coverings. Thanks to the sounding of the wall paintings, the original shades of the interior painting (clay and oil paints) were discovered.

The rehabilitation of the Müller Villa included the installation of the interiors with furniture, carpets and art objects in the final phase. Some lost furniture items, important from the point of view of the author's concept of the architect Loos, were reconstructed according to available archive photographs and drawings. The concept of the interior installation exactly copies the state after the completion of the building in 1930, when the presence and creative influence of the architect Adolf Loos can be documented, the state of the interior furnishings of the villa in this period is also documented by original plans, period photographs and the testimony of a number of important visitors.