The top floor is not always the penthouse.

The working definition

There is no legal definition of a penthouse, which is exactly why the word gets stretched. This is the working definition I hold a listing to before the premium is justified:

• Sits on the building's top floor or floors
• A distinct floor plan, not the tower's standard line carried up
• Private or significantly oversized outdoor space
• Ceiling heights above the building's standard
• In some towers, a dedicated elevator stop or private access

A unit on the 40th floor with the same plan as the 22nd floor is a high unit with a great view, and it should be priced as one. A penthouse is a different product from the building it sits on, and that distinction, not the floor number, is what the market ultimately pays for at resale.

What the top of a tower holds

The features below are what separate a penthouse from the standard line beneath it. None are universal. Every downtown tower drew its own line, so the chart reads as what to look for and what to ask about, not a checklist any single residence will satisfy.

Presence varies by tower and by residence within the same tower. Confirm every feature against the floor plan and the declaration, not the listing description. The full process is in my buyer's guide.

Why normal pricing logic breaks up here

Everywhere else in a tower, price per square foot against comparable sales in the building tells you most of what you need. At the top it stops working, for three reasons.

There are no comparables. A tower may hold only a handful of true penthouses, each with a different plan, terrace and exposure, and years can pass between trades. You are not pricing against the market, you are pricing against scarcity and the specific buyer who wants that specific residence.

Terrace space is priced inconsistently. Outdoor square footage is the most variable part of any penthouse and the least standardized in how it is valued. Two listings can treat similar terraces completely differently, and renderings and photos flatten outdoor scale more than anything else in a listing. Terraces have to be stood on, and their exposure matters, because wind at height is real and a terrace you cannot comfortably use is square footage you paid for and do not have.

Provenance and finish carry weight they carry nowhere else. At this level a residence trades partly on what has been done to it and who did it, which is invisible in a price per square foot number.

How penthouses actually trade

The thinnest market downtown is the top of it. Penthouse resale behaves nothing like the tower below: longer holds, longer marketing times when listed, and a meaningful share never publicly listed at all. Owners at this level tend to value discretion, the buyer pool is small enough to reach directly, and a residence this identifiable is hard to market anonymously. Much of what I know about at this level moves the way the private market works generally, only more so.

Financing thins out as well. At penthouse prices most purchases sit well past conforming loan territory, and in practice a large share of these transactions close cash, which compounds the speed and discretion the private market already rewards. The condo lending rules still matter for the building itself, but the top of it largely trades outside them.

Questions penthouse buyers ask

Is the top floor always the best floor?

Not automatically. Height buys view and it also buys wind, sun load on a terrace, and a longer elevator ride several times a day. In some towers the best residence is one or two floors below the roof, where the outdoor space is more usable and the plan is identical. The right answer depends on how you will actually live in it, which is a conversation, not a floor number.

How do I know what a penthouse is worth with no comps?

You underwrite it instead of comping it. What the plan and terrace would cost to replicate, what the building's scarcity actually is, what the exit looks like given how rarely these trade, and what the carrying costs run at this size. It is closer to valuing a one of one asset than pricing a condo, and it rewards a buyer who is willing to walk away from a number that only works as a story.

How do I see what is available if most of it is not listed?

Through representation. Penthouse availability circulates between owners and the agents who work each building long before, and often instead of, a listing. Tell me the buildings and what matters to you and I will tell you what actually exists at the top of them.