During this time, Ashfield was seen as a highly desirable location compared to the city, which had become crowded and pestilent. Many grand Victorian houses were built in the latter part of the 19th century. But by the time of World War I, the suburb had fallen out of favour and the rich residents had mostly headed for the North Shore. Many of the grand homes were knocked down in the 1920s and 1930s and replaced with small art deco blocks of flats or semi-detached houses. A few remain, however, and are listed in the Landmarks section.