What Is the Top Level of an Apartment Called?

When you walk into a luxury high-rise building and see the elevator buttons go up to 40, 50, even 60, you might wonder: what’s the very top floor called? It’s not just "floor 60"-there’s a name for it, and that name carries weight, prestige, and sometimes a price tag that makes even billionaires pause. The top level of an apartment is called a penthouse.

Penthouses aren’t just the highest floor. They’re a distinct type of unit designed to stand out. In most modern luxury buildings, a penthouse isn’t automatically assigned to the top floor. It’s a designation reserved for units that meet specific criteria: higher ceilings, private terraces, panoramic views, premium finishes, and exclusive amenities like private elevators or rooftop access. A unit on floor 58 might be labeled a penthouse, while the actual top floor (floor 60) could be a mechanical room or reserved for building systems. That’s how intentional the design is.

What Makes a Penthousе Different From Other Units?

It’s easy to assume any top-floor apartment is a penthouse. But that’s not true. A penthouse is defined by its features, not its location. In older buildings, penthouses were literally built on top of the roof-hence the name, from the French pent (to lean) and house. Today, they’re still elevated, but now it’s about luxury, not literal elevation.

Here’s what separates a penthouse from a regular top-floor unit:

• Ceiling height: Often 10 feet or higher, sometimes vaulted or double-height
• Private outdoor space: Terraces, rooftop gardens, or balconies that span hundreds of square feet
• Exclusive access: Dedicated elevator, private entrance, or keycard-only access
• Custom finishes: Hand-selected marble, imported wood, smart-home integration, and designer lighting
• Unobstructed views: Floor-to-ceiling windows with 360-degree sightlines, often overlooking city skylines or water
• Limited competition: Usually only one or two penthouses per building

In New York, a penthouse at 432 Park Avenue sold for $95 million in 2020. In London, a penthouse at The Shard had a private infinity pool and a helipad. These aren’t just apartments-they’re vertical estates.

Why Do Developers Build Penthouses?

It’s simple: penthouses are the profit engine of luxury buildings. While a standard unit might sell for $2,000 per square foot, a penthouse can command $5,000 to $15,000 per square foot. That’s because buyers aren’t just paying for space-they’re paying for status, privacy, and exclusivity.

Developers know that the top 1% of buyers don’t care about square footage alone. They care about what the space represents. A penthouse isn’t a place to live-it’s a statement. That’s why developers invest millions in finishes, design teams, and custom engineering just for one or two units. They’re not building housing. They’re building heirlooms.

Some developers even skip the top floor entirely. In the 2023 luxury tower at 111 West 57th Street in Manhattan, the highest occupied floor is 86. The actual roof is 92. Why? To create a dramatic visual effect and preserve the skyline silhouette. The penthouse is on 86. The rest is structural.

Are There Penthouses in Non-Luxury Buildings?

Yes-but they’re not the same. In mid-range buildings, the top floor might be marketed as a "premium upper-floor unit" or "sky residence." But without private terraces, exclusive access, or custom interiors, it’s not a true penthouse. It’s just a higher floor with a better view.

Real penthouses require three things: architectural intention, premium materials, and a level of service that goes beyond standard building amenities. If the elevator doesn’t stop at your door, if the ceilings are standard 9 feet, if the terrace is shared with neighbors, then you’re not in a penthouse. You’re in a top-floor unit with a nice view.

What About Duplex Penthouses?

Duplex penthouses are among the most sought-after in luxury markets. These units span two or more floors, connected by a private staircase. Think of them as a house stacked vertically. In Miami’s One Thousand Museum, a duplex penthouse has a rooftop garden on the third level, a living room on the second, and a master suite on the first-all within one unit.

These are rare. Only about 5% of penthouses in major global cities are duplexes. They’re often reserved for celebrity buyers, tech founders, or family offices looking for space to entertain without compromising privacy.

How Do You Identify a Real Penthousе?

If you’re looking at a listing that says "penthouse," here’s how to verify it’s real:

1. Check the floor plan-does it include a private terrace or outdoor space?
2. Look at the ceiling height-does it exceed 10 feet?
3. Review the amenities-is there a private elevator or dedicated entrance?
4. Confirm the unit count-is it one of only one or two units on the top floor?
5. Ask for the building’s original architectural plans-true penthouses are designed as separate entities, not afterthoughts.

If the answer to any of these is no, you’re likely looking at a marketing term, not a true penthouse.

Where Are Penthouses Most Common?

Penthouses thrive where land is scarce and demand for exclusivity is high. The top markets in 2026 are:

• New York City: Over 80% of luxury towers include at least one penthouse. The most expensive sold for $238 million in 2024.
• Hong Kong: Due to vertical density, penthouses here often include indoor pools and private cinemas.
• London: Penthouses in Mayfair and Knightsbridge come with rooftop helipads and butler service.
• Singapore: Sky villas with landscaped gardens on the 50th floor are common.
• Miami: Waterfront penthouses with infinity pools and beach access dominate the market.

In these cities, penthouses aren’t just homes-they’re trophies. Buyers don’t just buy the space. They buy the legacy.

What’s the Future of Penthouses?

The penthouse is evolving. In 2025, developers started adding solar roofs, carbon-neutral materials, and AI-controlled climate systems. Some new penthouses in Dubai and Singapore now include private vertical gardens that grow food. Others have integrated wellness zones with cryotherapy chambers and meditation pods.

But the core idea hasn’t changed: the top level of an apartment is still the most exclusive, most expensive, and most carefully designed space in the building. It’s not just about height. It’s about being above it all.