Key Biscayne

What is the average home price in Key Biscayne FL?

Key Biscayne is a low-volume luxury market where monthly median figures fluctuate significantly based on a small number of transactions. Recent data shows median sale prices ranging from approximately $1.4M to $2.3M depending on period and property type. Active listings carry a median asking price around $2.62M as of April 2026, with average list prices significantly higher when ultra-luxury single-family homes are included. Single-family homes carry average list prices in the $10M range. Condos average list prices around $1.97M. Homes currently average 72 to 183 days on market and tend to sell at approximately 7% below list price.

What is Key Biscayne and what makes it distinct?

Key Biscayne is a barrier island municipality approximately 4 miles from downtown Miami, accessible by the Rickenbacker Causeway. The island is bounded by Crandon Park to the north — one of Miami-Dade County's most visited parks — and Bill Baggs Cape Florida State Park to the south, which features a historic lighthouse and pristine beaches. The village has one public school rated 8 out of 10 by GreatSchools and access to private school options on the island. Key Biscayne has no through traffic, a strong pedestrian and cycling culture, and a significant international resident base. Its combination of island exclusivity and proximity to downtown Miami makes it one of the most distinctive residential addresses in South Florida.

What should buyers know about flood and insurance risk in Key Biscayne?

Flood risk is a defining characteristic of Key Biscayne. Data shows that the vast majority of properties on the island carry significant flood risk over a 30-year horizon given its barrier island geography and low elevation. Florida flood insurance costs have increased substantially in recent years and must be treated as a material ongoing ownership cost, not an afterthought. Before making an offer, buyers should obtain an elevation certificate, confirm the FEMA flood zone designation for the specific property, and get flood and windstorm insurance quotes. Your InvesTeam Realty agent will identify the flood zone status and elevation certificate status of every property you seriously consider. Consult a licensed insurance professional and a real estate attorney before closing on any Key Biscayne property.

What should condo buyers in Key Biscayne know about the Florida structural inspection law?

Florida Senate Bill 4D requires condominium buildings of three stories or more that are 30 years old or older to complete milestone structural inspections and Structural Integrity Reserve Studies. Key Biscayne has a number of condo buildings in scope of this law. Buildings with underfunded reserves or incomplete inspections may face special assessments or restrictions on unit sales. Before making an offer on any Key Biscayne condo, your agent will obtain and review the association's financial statements, reserve fund status, inspection reports, and any pending assessments. Consult a qualified real estate attorney before closing.

Is Key Biscayne a good place to invest in real estate?

Key Biscayne benefits from its island geography, proximity to downtown Miami, and a supply constraint that limits new development. These factors have historically supported values particularly at the top end of the single-family market. The current environment gives buyers more leverage than in prior years. Flood and windstorm insurance costs are substantial and rising, and must be factored into total cost of ownership and any investment return analysis. The market is very low volume, which limits liquidity. Past performance does not guarantee future results — consult your agent, a financial advisor, and an insurance professional when evaluating any Key Biscayne property.

What public schools serve Key Biscayne FL?

Key Biscayne is served by Miami-Dade County Public Schools and has one public school on the island rated 8 out of 10 by GreatSchools. Access to 3 private school options is also available on the island. School assignments are determined by property address and are subject to change - always verify zoning directly with Miami-Dade County Public Schools before making a purchase decision.

What are the closing costs for buyers in Key Biscayne?

Key Biscayne is in Miami-Dade County. Buyers typically pay 2% to 5% of the purchase price in closing costs on a financed transaction. At Key Biscayne price points that represents a substantial dollar figure. Key costs include doc stamps on the mortgage at $0.35 per $100 of loan, intangible tax at 0.20% of the loan amount, and owner's title insurance paid by the buyer in Miami-Dade County. Flood and windstorm insurance must also be budgeted as a recurring ownership cost. Use our free Buyer Closing Costs Calculator on the InvesTeam Realty website. If purchasing from a foreign seller, FIRPTA withholding requirements apply - consult your closing agent and a qualified tax advisor.

What is FIRPTA and does it apply to Key Biscayne transactions?

FIRPTA - the Foreign Investment in Real Property Tax Act - requires buyers to withhold up to 15% of the gross sales price when purchasing U.S. real estate from a foreign seller. Key Biscayne has a significant international resident base and FIRPTA applies regularly in this market. At Key Biscayne price points the withholding obligation can be very large. Buyers have a legal obligation to withhold and remit these funds to the IRS at closing unless a valid exemption applies. Both buyers and sellers should consult a qualified tax advisor and real estate attorney well in advance of closing.

Why choose InvesTeam Realty to buy or sell in Key Biscayne?

InvesTeam Realty has been active in the South Florida luxury market for over 24 years with experience in Key Biscayne and the broader Miami-Dade island and waterfront corridor. Broker-Owner Reinaldo Gonzalez holds 16 NAR professional designations including the Certified International Property Specialist designation, directly relevant to Key Biscayne's significant international buyer and seller base. We serve all buyers and sellers equally in full compliance with federal and Florida fair housing laws. Equal Housing Opportunity.

Ready to buy or sell in Key Biscayne?

Talk to an InvesTeam Realty agent today. No pressure, no obligation.