Census discontinued SAAR 2-4 unit-structures because tests for identifiable and stable seasonality do not meet reliability standards for publication. It is calculated by Haver Analytics by subtracting 1-unit structures and 5-unit structures from total housing starts.
Copyright, 2014, Haver Analytics. Reprinted with permission.
Source: US. Bureau of the Census
Release: New Residential Construction
US. Bureau of the Census, Housing Starts: 2-4 Units© [HOUST2F], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/HOUST2F/, July 2, 2015.