San Mateo County – Q3 2026 Market Overview

San Mateo County’s housing market showed mixed trends during the third quarter, with active inventory easing in July and August before increasing in September. Monthly sales moderated from their June level, while median sales prices remained near $1.67 million in July and August before rising to approximately $1.75 million at quarter-end. Average price per square foot gradually declined but remained above levels recorded at the start of the year. Average days on market shortened from approximately 31 days in July and August to 28 days in September. Overall, Q3 closed with a pickup in inventory and median pricing alongside shorter selling times, while sales activity continued at a more moderate pace entering Q4.