Housing prices have soared in the past year. The national Case-Shiller index is up 11.2% in the past twelve months, the largest gain since 2005-06. The FHFA index is up 12.0% in the past twelve months, the largest on record (going back to 1991).

Given these gains, some are wondering whether housing is back in a 2000s-type bubble. But a deep dive into the data suggests we are not.

To assess home prices we use the market value of all owner-occupied homes calculated by the Federal Reserve. We then compare that to the "imputed" rent calculated by the Commerce Department for the GDP report. (Imputed rent means what people would pay to rent their homes if they rented them from someone else.) In the past 40 years, home values have typically been 16.4 times annual rent. At the peak of the bubble in 2005, they were 21.4 times annual rent, or 33% above normal. Now, home prices are 17.8 times annual rent, about 11% above normal.

We also compare home prices to the Fed's measure of replacement cost. In the past 40 years, home prices have typically been 1.59 times replacement cost. In 2005, they peaked at 1.94 times replacement cost, a premium of 22.5%. Now homes are selling for 1.63 times replacement cost, only 2.5% above normal, which is minimal.

Does this mean housing is at risk? We don't think so. The recent price surge is based on fundamentals and the housing market should continue to boom.

The primary problem is a lack of homes. Based on population growth and scrappage (voluntary knockdowns, fires, floods, hurricanes, tornadoes...etc.), we would normally expect housing starts of 1.5 million per year. But in the past twenty years (March 2001 through February 2021), builders have only started 1.256 million per year. Builders haven't started more than 1.5 million homes in a calendar year since 2006.