Multifamily Construction Gains for Lower-Density Markets

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The Q2 2020 NAHB Home Building Geography Index (HBGI) reveals a notable multifamily construction shift to the suburbs/exurbs. This is similar to HBGI findings reported for single-family construction. A driver of this broader impact is COVID-19, which thus far has had larger impacts on higher density neighborhoods. These geographic changes will ultimately generate market share gains for smaller multifamily structures, including low-rise buildings.

A majority of multifamily construction takes place in large metro core and suburban counties, where large metropolitan areas are those with more than one million people. During the first quarter of 2020, over two-thirds of all multifamily permits were concentrated in such higher-density markets.

However, during the second quarter the balance changed, and, like single-family construction but in greater proportion, multifamily residential construction shifted somewhat to lower-density markets, including exurbs of large metros and smaller metropolitan areas. These areas are represented as the blue, brown and orange counties in the map below.

For the second quarter, the multifamily HBGI regional geography posting the highest year-over-year gain (on a four-quarter moving-average basis) was the exurbs at 27%, with suburbs of small metro areas, rural markets, small towns, and core counties of small metro areas trailing at still positive growth rates of 26%, 19%, 9%, and 8% rates respectively. Moreover, exurbs of large metro areas were the only region to record an increasing construction growth rate when moving from the first quarter to the second (increasing from 13% to 27%).

As a result of these changes, the market share for multifamily construction in the broad set of low-density areas (exurban areas of large metro markets, small metro core and suburbs, small towns and rural markets) increased from 32.9 percent a year ago to 34 percent.

These market shares are slow to change, thus making a one-percentage increase significant and noteworthy. As shown above, quarterly changes for the low density multifamily residential construction market share have been small, with levels ranging from 30.5% to just above 34.0% for the history of the HBGI. What is interesting to note, then, is the standard deviation-scaled changes of the data. For Q2 2020, the change was equal to 1.18 of the historical standard deviation, making the Q2 2020 shift to lower density markets a notable shift for the series.



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