Example 03
Villa extension Gauting, D 2010 Architects: Unterlandstättner Architekten, Munich Thomas Unterlandstättner Assistants: Meike Kübel, Anke Göckelmann Enrico Schreck, Telemach Rieff, Susanne Forner Structural planning: Statoplan, Munich
In 1890, a villa was built on a sloping, parklike site near the town centre of Gauting near Munich. Over a century later and despite several alterations, the original basic structure of this listed historic house was largely intact, but in bad condition. During a careful renovation, its original character was renewed, the facade restored in compliance with historic buildings regulations, and its spatial structure was returned to its original condition. An extension was built in place of the dilapidated load-bearing wall supporting the terrace. Soil between the new supporting wall and the existing cellar wall was removed, and the space created was used to build a guest apartment. The new structural elements show a clear and restrained design, inside and out, featuring a simple, light metal porch over the main entrance, a cube-shaped garage clad with panels, and the new extension at garden level, which forms a link between the landscape and the villa’s base. The building regulatory authority specified, however, that the extension should not stand out as an additional structural element, so as not to detract from the historic villa’s appearance. For this reason, the architects designed the new wall, which is also the extension’s facade, to look like a “rock face”. The 23 centimetre thick exposed concrete wall, with its coarse-grained bushhammered surface, was treated manually with jackhammers, obscuring the formwork joints and facade anchors and giving it a monolithic look. Because the surface did not need a protective coating, its natural look and feel blends smoothly into the surrounding landscape. Three cavernous recesses with floor-to- ceiling glazing let light into the extension’s 120 m2 of living space, while the interplay between inside and outside lends the elongated apartment’s interior its spatial variety. Broad stairs in an aperture in the cellar wall lead into the redesigned entry area of the guest apartment. The homogenous matt white colouring consolidates new and old elements and enables the built-in furniture to merge with the building’s overall floor plan. 190
4 Internal access, connecting stairs 5 Kitchen 6 Cellar (existing building) 7 Bathroom 8 Sauna 9 Living area 10 Sleeping area
Floor plan Cross section Scale 1:400 1 Entrance 2 Terrace 3 Entrance to guest apartment
11
22
Ground floor
aa 66 44 66 66
55 44
77
33
88 bb
99
10 10 aa
First floor
bb