The year structure built data capture the proportion of the households built during predetermined time intervals. These data are useful in understanding the composition of the existing housing stock. In particular, places with a large stock of rapidly depreciating homes might consider the targeting urban redevelopment initiatives that reduce the costs of ownership through things such as facade grants to assist with home painting or window replacement. In addition, housing stock built over the eras have created a large degree of heterogeneity within regional housing markets.