In this paper, a method for window detection in images of facades is presented. Windows play an important role in the context of deformation analysis of facades, and automatic detection from images is needed in novel, reflector-free measurement setups. The method we present is capable of detecting windows at several different orientations and scales, and yields good results for practical settings. The performance is demonstrated by an evaluation of the method using the Vienna and Zurich database sets of window images, which shows that window coordinates can be reliably detected.