Why have high suburban house prices stopped spurring new homebuilding?
Core argument: Real, constant-quality house prices sit at historically high levels in many major U.S. markets, most notably sunbelt areas, while homebuilding has declined sharply, especially in higher-price, lower-density places.
Real, constant-quality prices are at historically high levels in many major markets, most notably in sunbelt areas. Building levels have declined dramatically, especially in higher price, lower density areas. Figure 10 plots the shifting empirical supply curves [with price on the x axis and change in density on the y axis] over time for the four sunbelt metros. The empirical supply curve among suburban tracts in the 1970s (thick solid line) is always steeper than the supply curve for more central tracts (thick dotted line). Except for Dallas, the suburban line always is above the city line throughout our domain. In addition, the 1970s lines always are above those for the 1990s and 2010s. By the end of our data in the 2010s, the schedules have shifted down and flattened considerably, which is compatible with the decline in homebuilding discussed above. The lines for the 1990s show that this change began before the 2010s. High prices in the suburban parts of these metro areas no longer stimulate much new building, possibly because the residents of these areas have made it difficult to permit new projects.



