Property Taxes in Key Biscayne: Questions International Buyers Should Ask

The property tax on a Key Biscayne property is a public record you look up by address, not an estimate the seller hands you. And what the current owner pays is not necessarily what you will pay.

A parcel's assessed base can be recalculated after a sale, and the previous owner may also be enjoying exemptions or assessment caps tied to their personal situation that do not transfer with the property. A buyer who budgets from the seller's bill is budgeting from someone else's number. On top of that, the applicable rate depends on the municipality and on the special districts covering that address, so two nearby properties can sit in different taxing jurisdictions.

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

What to verify, step by step

1. Look up the exact address on the county Property Appraiser's parcel record and read the assessed value, the exemptions applied and the history.
2. Check the tax bill with the county Tax Collector and verify whether it is current or there are outstanding balances on that parcel.
3. Ask the Property Appraiser how the base is recalculated after a sale and which of the seller's exemptions do not transfer.
4. Identify the municipality and the special districts that levy on that address, because they are not the same across the county.
5. Take your specific situation to an U.S.-licensed accountant before making an offer, and ask as well about the non-resident owner's federal obligations.
6. Ask the seller in writing to confirm whether there are tax liens or special district assessments on the parcel.

Mistakes that cost money

• Budgeting from the seller's bill: it may carry exemptions and caps that do not transfer with the sale.
• Confusing the county's assessed value with market price: they are two numbers with different purposes.
• Assuming the rate is the same across Miami, when it depends on the municipality and the special districts covering the address.

Frequently asked questions

Where do you check a property's actual tax?

The county Property Appraiser's parcel record gives the assessed value and the exemptions; the bill and its payment status are at the Tax Collector. Both lookups are public and free.

Does the tax go up after you buy?

The assessed base can be recalculated after a sale and the seller's exemptions may not transfer. How it applies in a specific case is a question for the Property Appraiser and an accountant.

Does a foreign owner pay more property tax?

That is not something we can assert: property tax is levied by the county on the parcel. A non-resident owner's tax obligations are a separate matter, checked with an accountant and the federal agency.

Where to check it

• Miami-Dade County Property Appraiser — record card, area, year built and parcel history
• Miami-Dade Tax Collector — the property tax bill and its payment status
• Internal Revenue Service — the non-resident owner's federal tax obligations
• Miami-Dade Clerk of the Courts — deeds, liens, encumbrances and litigation on the property
• 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