S&P Dow Jones issued their April 2021 CoreLogic Case-Shiller Home Price Index as Seattle sweltered under the heat dome in late June. The index revealed historic residential price increases across the board, with just Chicago falling short of a 10% year-over-year increase. Seattle and San Diego, with gains of 20.2 percent and 21.6 percent, respectively, continued to outperform their West Coast counterparts.

In February 2021, after five months of close calls, San Diego's residential prices finally surpassed those of Seattle on the Case-Shiller Home Price Index. Despite this, prices in the Central Puget Sound region rose by more than 15%, and all but two cities on the index (Chicago and Las Vegas) experienced double-digit year-over-year increases

The November Case-Shiller Home Price Index reported that for the tenth consecutive month, the Seattle metro area remained second in the nation in terms of residential price growth year after year after nationwide leader Phoenix. For the fourth month, San Diego remained in third place, outranking Tampa in August for the first time. In all three of these top cities, residential price indices rose year-over-year at rates between 12 and 14 percent. Over the same period, no other West Coast city has seen prices increase by more than 10 percent.