How many additional housing units would restoring affordability require?
Core argument: The authors estimate that fixing the U.S. housing shortage and restoring affordability requires roughly 3–4mn additional housing units, equal to 2–2.6% of the current housing stock.
A sharp and prolonged slowdown in the growth of housing supply following the 2007-09 Great Recession has weighed on affordability. The share of total housing stock available for sale or rental is now below its historical average, which implies a gap between supply and demand. Our analysis suggests that fixing the shortage and restoring affordability will require around 3–4mn additional housing units, or 2-2.6% of the current housing stock. Among states, we find that California and Florida have the largest shortages. Other studies estimate the national housing shortfall to be around 1.5-5.5mn units, or 1-3.7% of the current housing stock. While it is hard to directly compare some of these estimates to ours because they used different assumptions and reference points for affordability, their median estimate is broadly in line with our findings.




