Aziz Sunderji of Home Economics has come up with an interesting way of measuring luxury home sales. He starts by identifying the top-decile price in 2019 for a collection of metro areas (i.e., the top 10% of all home sales in a given market).

This means that if the top 10% of homes in a city sold for $1 million or more, then $1 million is the threshold for a home to be considered "luxury."

But to prevent general market inflation from skewing things over time, he then adjusts this luxury threshold according to how the entire market performed. For instance, if average home prices have increased by 30% since 2019, then the luxury threshold also increases by 30%. In our example, it is now $1.3 million.

Now what?

By definition, in 2019, exactly 10% of sales in a given market were deemed to be luxury. But because the luxury threshold moves in tandem with the general market, Aziz is then able to see if the luxury segment grew or shrank in a particular market.

If, for example, only 4% of home sales are now above the new trended luxury benchmark, well then this indicates a shift toward affordability, as opposed to luxury. To be considered luxury today, a home's value has to have grown faster than the average home in that market.

The result is the above chart, which shows three luxury outliers, and two in particular: San Jose and Miami. This illustrates that so-called "K-shaped" economy.

Cover photo by Charlie Lederer on Unsplash

Charts from Home Economics