Over the last few decades, storey extensions and loft conversions have contributed to residential consolidation in built-up areas, creating much sought-after housing. An interesting example of this is the concept realized in Penzinger Strasse in Vienna, not far from Schönbrunn. Here in the outskirts of the city, a typical ensemble of buildings for mixed residential and commercial use from different building eras has been converted and the entire properties rearranged. The single-storey street block was erected around the end of the 18th century and the build-on of additional storeys was not...