The intervention is small-scale, the location central. The Thürwachterhaus is located on the edge of Ingolstadt’s old town, less than 50 meters from the Taschentorturm – one of the last three remaining city gates of the Bavarian fortress city. The neighborhood is characterized by narrow alleyways, small-scale buildings and an urban space that is defined not by grand gestures, but by scale and density. Here, the project by BÜRO MÜHLBAUER fits into the existing structure with a precise conversion – and reinterprets the type of urban farmhouse.
The original complex consisted of a residential building, a farm building (barn) and a small courtyard. Until recently, the ensemble was largely preserved in its historical volume, albeit in a structurally precarious condition. The task: to convert it into four contemporary residential units – with respect for the existing building fabric, but without museum considerations.
Access to the site is still via a narrow side alley. From there, the small courtyard opens up – not a garden, but rather an open space with a utilitarian character typical of urban farmsteads. The basic structure of the floor plan has been retained. During the renovation, the house was divided into three separate apartments: one unit on the first floor and two maisonettes above. A total of 180 square meters of living space was divided up here. The spatial organization follows less the grid of the original use than the new requirements of today’s living standards.
The more interesting intervention is the former barn. Where hay was once stored, there is now a three-storey townhouse with 90 square meters of living space. The outer cubature has been retained – but the volume has been completely restructured. The architects placed a room-holding concrete structure in the existing building, which both statically supports the new extension and defines its design. The casting was carried out with hand-crafted board formwork, which gives the surface a robust texture – left visible in the interior.
The contrast between old and new is not sought, but rather set. Exposed concrete meets restored beams, clear interfaces meet traces of use. The original roof truss was restored and exposed by the carpenter. It now spans an open sequence of rooms that extends from the first floor to below the ridge line. A central air space connects the floors vertically – the gallery, kitchen and dining area are staggered one above the other. It is a spatial dramaturgy that expands the narrow floor plan without overexposing it.
The small courtyard was also reorganized. Landscape architect Prof. Maurus Schifferli from Bern laid out the area based on its original use as a dung heap – but without any historical reconstruction. Instead, the courtyard formulates a precise reference: a slightly raised seating area marks the former position of the heap, flanked by two native plants – climbing hydrangea and mulberry tree. The design dispenses with decorative elements and instead sees itself as a functional outdoor space with spatial depth.
The connection between inside and outside is deliberately kept open. Large openings on the first floor of the new concrete structure face the courtyard, allowing light, views and movement between the building sections. The courtyard is not a garden in the traditional sense, but a place to spend time – and as such is an integral part of the architectural concept.
The Thürwachterhaus dispenses with creative exuberance. Instead, it relies on robust materials, clear structures and a controlled dialog between the existing building and the intervention. The decision to use an internal concrete structure in the former barn may have been motivated not only by design but also by economic considerations – but it is precisely implemented and formally restrained enough not to dominate the character of the ensemble.
The project remains locally anchored without being provincial. It shows that urban development can also take place on a small scale – and that neither pathos nor iconography is required for the architectural treatment of the existing buildings. Only attitude.
Read also: The conversion of a coach house in Basel.












