Five penthouse units have terraces measuring 30 to 50 feet long.

Prices in the new buildings range from $151,000 for a studio to $720,000 for a penthouse unit with a roof deck.

They pay $2,700 a month for a penthouse unit.

The four penthouse units are being left unfinished until sold; then the interior is designed to the buyer's taste.

The Holston, scheduled to open in a year, is marketing a penthouse unit that sells for more than $1 million.

A 20,000-square-foot sixth floor is being added to the 80-year-old building for 13 penthouse units with terraces.

At the same time, a dozen new residential buildings - some with penthouse units selling for more than $500,000 - are rising.

The project is 85 percent sold, with prices from $130,000 to $400,000 and penthouse units topping out at $1.25 million.

The building will contain five commercial suites on the ground floor, 104 apartments, and two penthouse units.

He ticked off a short list of recent examples, often people who had traded up to penthouse units.