Affordable building lots in central locations in the large cities and metropolises are rare. When there are no available gaps in the urban structure, attic conversions and extensions are an interesting and favored form of redensification. This volume explores approximately 60 attic projects, as extensions, conversions, or new construction, which utilize the previously used storage space for new use. Existing buildings are expanded upwards and adapted to the contemporary desires and demands of their use. Some constitute a homogenous extension of the existing façade and augment the view in a barely noticeable way. Others use the design freedom above the eave height in order to create a 21st-century architecture which contrasts with the historical building substance.