When several new projects are selling at once in Key Biscayne, the temptation is to compare them by price per square metre and by the amenity list. Neither is comparable until you first equalise what is being measured.
Two projects can advertise the same unit size and measure it differently: one includes the terrace and the wall thickness, the other counts only habitable interior space. One delivers a fitted kitchen, the other offers it as a paid option. One projects association budgets based on a full building, the other publishes none. Comparing before you equalise the unit of measure and the delivery standard produces a conclusion that looks financial and is merely copywriting.
Key Biscayne moves through a different channel because the village keeps its own permit counter and because everything that reaches the island crosses a single bridge. For a buyer abroad that is not scenery, it is logistics. The contractor quoting a renovation prices in travel and the delivery window in which material can be unloaded; the appraiser and the inspector your lender sends depend on that same bridge; and scheduled work can stop because of a closure nobody told the buyer about. On top of that, the county does not grant the approval: height, setback, landscaping and dune protection rules are set by the village, and when the parcel touches the shore a state authority enters as well, so a wall, a dock or a pool may require more than one file. Ask your insurance broker how the carrier reads the exposure of that specific parcel and what it requires before issuing; ask your closing attorney whether dune restrictions or easements are recorded on title; ask the village which work is approved at the counter and which goes before a board. It also pays to learn who manages the building or the association, because on a small island the manager is the person who actually answers.
What is specific to Key Biscayne
A barrier island with its own village government, reached only by the Rickenbacker Causeway, with large parks at both ends. Oceanfront towers, low-rise buildings and a core of single-family homes inland. A single tolled road in; there is no rail and no alternative if the causeway closes.
- what the single road implies: evacuation, rush hour and closures for works or events
- the parcel's coastal exposure and what that means for insurance
- the village's own rules, which are not the county's
What to verify, step by step
- Ask each project for its finishes schedule and lay them side by side: that is the document stating what is delivered installed and what is billed separately.
- Ask each one how it measures the advertised area and request the dimensioned plan of the specific unit, not the typical floor.
- Request the estimated association budget and the reserve study if one exists, and compare the line items rather than the total.
- Compare orientation, height and the neighbouring unit on the full floor plan, because those cannot be changed later while amenity lists can grow.
- Separate the verifiable from the promised: the permit and the land are checked at the county; a beach club or a hotel brand are clauses you have to read.
- Run the comparison with a Florida-licensed broker who does not work exclusively for one of the projects.
Mistakes that cost money
- Comparing price per square metre across projects that measure area differently: the conclusion comes out backwards.
- Deciding on the amenity list, which is the easiest thing to change and the thing that later drives association dues up.
- Comparing a permitted project against one that only owns land as if they were the same offer.
Frequently asked questions
- What can actually be compared between two projects?
- The finishes schedule, the dimensioned unit plan, the orientation, the state of the permit file and the contract clauses. Those are documents, not sales arguments.
- So price per square metre is useless?
- It is useful only after confirming that both projects measure area the same way and deliver an equivalent finish level. Without that it is a figure with no common denominator.
- Can association dues be compared before delivery?
- You can compare the estimated budget each developer projects, requested in writing. It is their estimate, not a settled figure, and it is worth reading line by line.
Where to check it
- Miami-Dade Permitting and Inspection Center — open or closed building permits on an address
- Miami-Dade County Property Appraiser — record card, area, year built and parcel history
- Florida DBPR, Division of Condominiums — state rules on condominiums and associations
- Florida DBPR — whether a broker, appraiser or contractor holds a current licence
- Village of Key Biscayne — the rules of the municipality Key Biscayne belongs to
Official bodies. Specific figures are requested there, not copied from a listing.
Updated 2026-11-06
More about Key Biscayne
- Pre-Construction Deposits in Key Biscayne: Payment Schedules and Buyer Questions
- Real Estate Developers in Key Biscayne: How to Review a Developer’s Track Record
- Price Ranges for New Condos in Key Biscayne: What Affects Asking Prices?
- Condo Price Ranges in Key Biscayne: How to Compare Similar Properties
- Closing Costs for Property Buyers in Key Biscayne: What to Include in a Budget
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