Preserving heritage and creating functional living spaces is not an easy task. The facades of historic buildings often hide inconvenient layouts and old utilities. The choice is between redevelopment and restoration. The most common option in Russia is the preservation of the facade and complete renovation of the internal structure. It is more difficult to preserve the building by maintaining its historical features. One of the most striking full renovation projects in Moscow including interiors is the legendary Narkomfin building. When restoring old buildings, it is important to find a compromise between the desire to create a maximum of good space and the need to preserve historical features.