Eau Claire: Rectangular Houses

 Rectangular houses come in two different orientations to the street they face: parallel or perpendicular.  The orientation is determined by the direction of the ridge pole of the house.  In the 1920s-1930s the short sides of rectangular houses faced the streets (type A), but by the late 1940s and beyond, the long sides faced the streets (type B).  The change in orientation was common as lot sizes began to grow after WWII.