Headlines Vs. Trendlines | Case-Shiller Index Update And The Summer Sales Surge

New data released by the S&P/Case-Shiller Home Price Index suggests the Seattle metro area is experiencing a continued slowdown of home price appreciation as of May 2025, notching up just 1.82% year-over-year. 

In general, RSIR brokers are reporting a delayed “Spring Sales Surge,” which has become a “Summer Sales Spike,” given both global and regional factors affecting the real estate market.

We can also see a significant increase in supply of resale single-family homes in the four-county region (this is the closest match to how S&P/Case-Shiller measures median home prices, which doesn’t include new construction or condominiums).

For this study and looking at just Q2-2025, we find supply has been outstripping demand recently, with 41.5% more inventory year-over-year, but less buyer activity by comparison, leading to downward pressure on price escalation. Looking past May’s data above, we saw some rekindling of buyer interest in June, as remarked by The Seattle Times in their monthly reporting.

This graphic by The Seattle Times shows the May “dip” but recovery in June for King County.

To discuss what the data means for your own selling or buying journey, reach out to one of our expert advisors.