Kirchstraße 29, Architectural structure in Bregenz, Austria.

Kirchstraße 29 is a residential building with a front facade measuring only 57 centimeters in width, wedged between neighboring structures number 27 and 31. The house offers approximately 60 square meters of living space and widens toward Thalbachgasse at the rear.

The house was first documented in 1796 serving a wax maker as a residence. Later it housed a family operating a brush binding and baby carriage business until this work ended in 1999.

Locals market the house as the "narrowest house in Europe", a label that draws visitors to the 57 cm facade. The building follows the tradition of parasitic architecture, inserted into a gap without its own side walls. The entrance door is wider than the facade and overlaps house number 31.

The entrance door is wider than the 57 cm facade and overlaps house number 31. The building is a private residence, so it is viewed from the street. The narrow front is deceptive: the house widens wedge-like toward Thalbachgasse at the rear.

The house has no side exterior walls of its own; it was inserted into the existing gap between numbers 27 and 31 in the tradition of parasitic architecture. Its front door is wider than the 57 cm facade, so it extends onto the neighbouring building at Kirchstraße 31.