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Apartment rent growth cools across the Puget Sound region as summer winds down

Annual gains remain positive following a strong spring leasing season
CoStar Analytics
September 10, 2026 | 4:55 P.M.

Seattle-area apartment rents edged down in August from the previous month, ending a seven-month run of increases. The shift aligns with the typical late-summer pattern, when leasing activity slows after peaking in the spring.

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