The S&P Cotality Case-Shiller San Francisco Home Price Index was 366.01 in August 2026, up 3.37 percent from August 2025 and down 0.68 percent from July. S&P Dow Jones Indices released the August numbers on October 27. The index tracks repeat sales of single-family homes in the San Francisco metro, which includes San Francisco, San Mateo, Marin, Alameda and Contra Costa counties, and is set to 100 for January 2000.Source: S&P Dow Jones Indices, "S&P Cotality Case-Shiller Index Reports Annual Gain in August 2026," October 27, 2026.San Francisco's 3.37 percent annual gain was the fifth largest of the 19 metros reported for August. Detroit had no valid August update because of recording delays in Wayne County. Chicago led at 6.70 percent, followed by New York at 6.19, Cleveland at 4.29 and Miami at 4.24. The 20-City Composite was up 2.65 percent and the U.S. National index was up 2.09 percent. Los Angeles was up 1.36 percent, San Diego 2.29 percent, and Seattle was down 1.96 percent, the weakest of the group.Source: same S&P release, Table 2.The August dip from July was the third monthly decline in a row on the unadjusted index, which was 371.49 in May, 371.01 in June and 368.52 in July. August is down 1.47 percent from May. On a seasonally adjusted basis the index rose 0.46 percent from July, to 364.66.Source: S&P release, Table 3, and FRED series SFXRNSA and SFXRSA, updated October 27, 2026.The San Francisco index peaked at 393.83 in May 2022. August 2026 is 7.06 percent below that level.S&P also splits the San Francisco index into price tiers, and they moved differently:Low tier: 378.84, down 1.54 percent from July, up 0.09 percent from a year earlier, 9.40 percent below its May 2022 peakMiddle tier: 372.89, down 1.42 percent from July, up 0.91 percent from a year earlier, 10.77 percent below peakHigh tier: 368.01, down 0.07 percent from July, up 5.85 percent from a year earlier, 4.12 percent below peakThe San Francisco condo index was 289.78, up 0.32 percent from July and up 5.13 percent from August 2025. It is 7.73 percent below its April 2022 peak of 314.05.Tier and condo figures from FRED series SFXRLTNSA, SFXRMTNSA, SFXRHTNSA and SFXRCNSA (not seasonally adjusted), source S&P Dow Jones Indices, updated October 27, 2026. Changes calculated by Golden Gate Luxury from the published index levels.Case-Shiller uses a three-month moving average, so the August reading reflects sales recorded in June, July and August. The September index is scheduled for release on November 24.Freddie Mac's weekly survey put the 30-year fixed rate at 7.32 percent for the week of October 22, 2026, down from 7.40 percent the week before and up from 6.19 percent a year earlier.Source: Freddie Mac Primary Mortgage Market Survey, October 22, 2026.Michael Williams is a Bay Area agent with Golden Gate Luxury (Turbohome Inc). Seventeen years in, more than $250M closed, formerly #1 at Flyhomes and Aalto, DRE #01780513. Golden Gate Luxury is not affiliated with Golden Gate Sotheby's.General market information only. Nothing here is legal, tax, or financial advice. Index values can be revised for up to 24 months as more sales data arrives; verify current MLS data and loan quotes before acting on any of it.Also on Medium: https://medium.com/@michael_30207/san-francisco-area-home-prices-were-up-3-4-percent-from-a-year-earlier-in-august-per-case-shiller-99ec507c2d46
Michael Williams
Luxury Specialist
Area served: Sausalito, Marin County, CA, Menlo Park, CA, San Francisco, CA
Expertise: First-Time Buyer, Luxury, Zoning Knowledge