Housing Split is the number of single-family housing versus multi-family housing. Tracking this data involves gathering unit structure data and grouping multi-family and single family homes built. Attached multi-family is one or more attached homes, while other includes mobile homes, boats, RVs, etc. As the chart reveals, single family and multi-family home splits have remained steady. Detached single family homes have averaged around 75%, with multi-family about 35% in recent years. The chart displays US Census Bureau data on 1-year estimates. Refer to the graph below for exact numbers of attached and detached units.