How many penthouses are for sale in Key Biscayne?

4 penthouses are for sale in Key Biscayne on the MLS as of October 30, 2026. 0 came on the market in the last seven days and 1 has a reduced asking price. The list updates through the day as the MLS changes.

What counts as a penthouse in Key Biscayne on this page?

A condominium for sale in Key Biscayne whose MLS unit number marks it as a penthouse: PH, UPH, LPH or the word itself. The MLS has no penthouse field, so the label is the listing agent's, and a top floor residence entered under a plain unit number does not appear here. Ask us about a building and we check its upper floors by hand.

How do I schedule a private showing of a penthouse in Key Biscayne?

Ask us for the one you want to see. Penthouse showings are by appointment, usually with proof of funds or a lender letter, and some buildings ask for notice a day ahead. A BreakThru Realty broker books the showing and sends the building's recent penthouse sales and its association documents before you walk through.

How do I compare a Key Biscayne penthouse with the rest of its building?

Start with the penthouses that have sold in the same building and in the towers beside it, adjusted for the floor, the terrace, the view line and the condition, then read the association budget, the reserve study, the milestone inspection and any assessment. A price in line with those sales is a fair price; one far above them leaves room to negotiate. Request a private penthouse review on this page and a broker pulls the sales and reads the documents with you before you offer.

Penthouses for Sale in Key Biscayne

Before You Buy a Penthouse in Key Biscayne, Know the Building.

Key Biscayne penthouses are the top floors of the oceanfront buildings along the island's east side: Oceana Key Biscayne, the towers of The Ocean Club, Grand Bay Residences, Mar Azul, Key Colony and the Commodore Club, with the Towers of Key Biscayne and The Sands among the established buildings. The island is a causeway from Brickell and most of it is single family, so penthouses are few and most face the ocean or Crandon Park.

The view from a penthouse for sale in Key Biscayne

Explore Penthouses for Sale · Get My Private Buying Strategy

4 penthouses are for sale in Key Biscayne on the MLS as of October 30, 2026.

BreakThru Realty · Founder and Broker of Record: Tyson E. Sam, Florida License 3565210

Key Biscayne Penthouses: the Numbers

As of October 30, 2026. Condominiums for sale in Key Biscayne whose MLS unit number marks them as a penthouse (PH, UPH, LPH). BeachesMLS listings (IDX). Asking prices, not closed sales.

Penthouses for sale: 4
Median asking price: —
Median asking price per square foot: —
Listed in the past seven days: 0
Listed in the past 30 days: 0
With a reduced asking price: 1

A median of fewer than 5 listings is shown as —. A home entered twice in the MLS appears once. A price cut larger than half the original price is read as a data entry error.

Penthouses by Building in Key Biscayne

Every building with a penthouse for sale on this page, with each building's own page where this site has one: its units for sale and for rent, its recent closings and its figures.

The Largest Penthouses for Sale in Key Biscayne

445 Grand Bay Drive PH-1A, Key Biscayne: 8,435 sq ft, $18,900,000 ($2,241 per sq ft), Grand Bay Residences
350 Ocean Drive LPH2N, Key Biscayne: 4,764 sq ft, $17,900,000 ($3,757 per sq ft), Oceana Key Biscayne
799 Crandon Boulevard PH-8, Key Biscayne: 4,566 sq ft, $18,500,000 ($4,052 per sq ft), Ocean Tower One at The Ocean Club
737 Crandon Boulevard PH-1, Key Biscayne: 2,060 sq ft, $2,250,000 ($1,092 per sq ft), Lake Villa II at The Ocean Club

Newest Penthouse Listings in Key Biscayne

Each card shows the asking price, the price per square foot, the building, the facts the listing carries and, where the asking price has been reduced, the previous price and the date it changed. Sort and filter the list by county, city, building, price, bedrooms, waterfront, reduction and listing date on this page.

See Them on the Map

Oceanfront and Waterfront Penthouses in Key Biscayne

4 listings.

Penthouses With a Reduced Asking Price in Key Biscayne

1 listing.

$17,900,000 ~~$18,500,000~~
Reduced $600,000 (3.2%) on Jun 23, 2026
350 Ocean Drive LPH2N, Key Biscayne FL 33149
5 bd · 6 ba · 4,764 sq ft · $3,757 per sq ft · Waterfront · Built 2014
Oceana Key Biscayne

Penthouses From $5 Million in Key Biscayne

3 listings.

What Penthouse Buyers Weigh in Key Biscayne

The Ocean Club and Key Colony carry club and community amenities beside the association fee; ask what is included and what transfers.
With few penthouse sales on the island, the building's own history and the sales in the towers beside it are the comparison, not an island average.
The milestone inspection, the reserve study and any assessment belong beside the asking price in buildings of this age.

The Building Decides What the Penthouse Is Worth

A penthouse shares its roof, its elevators and its budget with every residence below it, and it usually carries the largest share of whatever the association decides to spend. Before you price an offer, read the association budget, the reserve study, the milestone inspection report and any special assessment, and ask who pays when the roof above your ceiling leaks. A BreakThru Realty broker gathers those documents with the building's own penthouse sales, so you compare the residence with the ones it actually competes with. Request a private penthouse review on this page and we start with the building.

Three Top Floors Can All Be Called Penthouses

Many towers label two or three upper floors as penthouses, lower and upper, and some label a whole line of large residences that way. The word tells you less than the floor plan, the ceiling height, the deeded terrace and the line of the view. We read the plan and the declaration of condominium with you, confirm what the unit owns and what it only has the use of, and show you the top floor residences listed under plain unit numbers that never appear on a page like this.

How to Read a Penthouse Listing

Price the terrace and the view, not the label: Two penthouses in the same building can differ widely in price on the terrace, the ceiling height and the direction they face. Compare the asking price with the penthouses sold in that building and the towers beside it, not with the units on the floors below.
Read the reserves before the finishes: A renovated penthouse in a building facing a large assessment can cost more than a dated one in a building with funded reserves. Ask for the budget, the reserve study, the milestone inspection and the minutes of the last board meetings.
Ask what the unit owns: Rooftop terraces, plunge pools, private elevator landings, cabanas, storage and parking are deeded differently from building to building. The declaration says what conveys with the unit and what is a limited common element you share or lease.
Count the new towers nearby: A penthouse in an older oceanfront building competes with the top floors of the new construction a few blocks away. The developer's current pricing, the deposit terms and the delivery date are part of the comparison.

Get Penthouse Alerts for Key Biscayne

Choose a place and a budget. We email you each penthouse that comes on the market, straight from the MLS, and each one whose asking price is reduced. Sign up on this page, or call or text (786) 914-1017 and we set it up for you.

Request a Private Penthouse Review

Tell a licensed BreakThru Realty broker which penthouse interests you. We pull the building's penthouse sales and active listings, its budget, reserve study, milestone inspection and assessment status, and the top floor residences listed under plain unit numbers, then recommend an offer price and terms. Nothing reaches the listing broker until you decide to offer. Call or text (786) 914-1017 or email sales@breakthrurealty.com.

What happens next: a broker replies within one business day with the building comparison and the documents to read, and books a private showing at a time that suits you.

Own a Penthouse? Your Buyer May Already Be Working With BreakThru Realty

Penthouse buyers ask for specific things: a building, a line, a terrace, a view, a floor. When a buyer working with BreakThru Realty tells us what they want, we keep a record of it. Before your penthouse is photographed or announced, a broker checks it against those requirements and tells you privately whether anything might fit. If no buyer on file fits, the marketing plan that reaches the rest of the market follows, built around your objectives. See if we already have your buyer before you list.

Connect with our PreApproved Buyers

Key Biscayne Penthouses: Questions

How many penthouses are for sale in Key Biscayne?: 4 penthouses are for sale in Key Biscayne on the MLS as of October 30, 2026. 0 came on the market in the last seven days and 1 has a reduced asking price. The list updates through the day as the MLS changes.
What counts as a penthouse in Key Biscayne on this page?: A condominium for sale in Key Biscayne whose MLS unit number marks it as a penthouse: PH, UPH, LPH or the word itself. The MLS has no penthouse field, so the label is the listing agent's, and a top floor residence entered under a plain unit number does not appear here. Ask us about a building and we check its upper floors by hand.
How do I schedule a private showing of a penthouse in Key Biscayne?: Ask us for the one you want to see. Penthouse showings are by appointment, usually with proof of funds or a lender letter, and some buildings ask for notice a day ahead. A BreakThru Realty broker books the showing and sends the building's recent penthouse sales and its association documents before you walk through.
To request a tour, call (786) 914-1017 or email sales@breakthrurealty.com.
How do I compare a Key Biscayne penthouse with the rest of its building?: Start with the penthouses that have sold in the same building and in the towers beside it, adjusted for the floor, the terrace, the view line and the condition, then read the association budget, the reserve study, the milestone inspection and any assessment. A price in line with those sales is a fair price; one far above them leaves room to negotiate. Request a private penthouse review on this page and a broker pulls the sales and reads the documents with you before you offer.