Commercial real estate in Key Biscayne.

How Key Biscayne actually prices

Everything about this market comes back to the causeway. Key Biscayne is reached one way, over the Rickenbacker, and the island’s commercial footprint is effectively fixed. Sixteen retail sales have been recorded since 2022, in a $1,025 to $1,293 range with a $1,220 median. That is the highest price per square foot anywhere in my tri-county dataset, and I want to be straight with you that sixteen transactions is a small sample. It is enough to establish a floor. It is not enough to model precision. What it does prove is that nobody discounts here. Sellers are typically long-held owners, buyers typically have a specific reason to want this island, and the two find each other quietly.

The corridors that matter in Key Biscayne

There is really one commercial address on the island, and it is Crandon Boulevard. The boulevard runs the length of the village between Crandon Park at the north end and Bill Baggs Cape Florida State Park at the south, and everything commercial hangs off it. Within that, differences are block by block rather than corridor by corridor. Centres like The Square at Key Biscayne on Crandon Boulevard hold the concentrated retail and restaurant space, while other stretches are ground-floor bays under residential buildings or small standalone structures. The side streets off the boulevard, including the civic blocks around West McIntyre Street where the village offices sit, carry some professional and service space but nothing that competes with the main frontage. Harbor Drive and the residential streets are exactly that. When a client tells me they want Key Biscayne, we are discussing a short list of specific bays, not a submarket.

The Key Biscayne constraints nobody mentions

Nothing new is coming, so the entire negotiation is about an existing bay. I tell clients to stop thinking about comparables and start thinking about whether they can operate in the space they can actually get. The single access point cuts both ways. It insulates the trade area from outside competition, which is why local operators do well here, and it also means storm closures and bridge work hit every business on the island at once. Build-out costs run above the mainland because every contractor and delivery crosses the causeway. Budget for that honestly. Seasonality is real and the resident base is not large, so I want a concept that works on year-round island residents with visitor traffic as upside rather than the reverse. Landlords know exactly what they have. Expect firm terms and very little appetite for free rent.

Key Biscayne pricing & data

Start with the local numbers, then get a defensible figure for a specific building:

How I help in Key Biscayne

Whatever your side of the deal in Key Biscayne, I work for you — never the landlord. Tenant, buyer, and seller representation across Miami-Dade County.

Explore nearby & up a level

Compiled by Justin Crow, Mattis Advisors — for reference, not an appraisal.