Key Biscayne, FL housing market

The median sale price in Key Biscayne, FL was $1.52M in May 2026, up 17.3% year over year, measured across homes that actually closed that month (Redfin). The three months through May 2026 averaged $1.85M, firming from $1.5M across the three months before that. That puts prices 6.5% below the strongest three-month stretch on record here, which ended in Nov 2025 at $1.98M. Zillow's home value index, which models the entire housing stock rather than only the homes that changed hands, reads $1.71M for Jun 2026, up 2.5% year over year.

Buyers had 155 homes to choose from in May 2026, down 16.2% year over year (Redfin). At the current sales pace that standing inventory works out to 9.7 months of supply; convention treats four to six months as a balanced market, which puts Key Biscayne, FL on the buyers' side of it. 39 homes came to market in May 2026, up 34.5% year over year, against 16 closings, down 23.8% year over year. Homes that sold in May 2026 took a median of 178 days to go under contract, 53 days slower than this market's usual May pace.

Competition is measurable in the closings themselves: 6% settled above asking, and the average sale landed at 95% of its final list price. 12% of listings carried a price cut in May 2026.

This page tracks 10 monthly housing series for Key Biscayne, FL — median sale price, ZHVI home value, inventory (active), median days on market, months of supply, homes sold, and more — sourced from Redfin, Zillow ZHVI, running from Aug 2016 through Jun 2026. Chart any of them below, switch between levels and year-over-year change, or add nearby Florida markets to compare side by side.