New NoMad condo building 241 Fifth Avenue has been relatively quiet since it launched with some fanfare in June. But it has been selling—there are six active listings on StreetEasy, compared to 15 in contract. The building is trying drum up excitement and sell out with the staging and listing of penthouse 20, a 3BR, 3.5BA pad. Points in its favor: the unit is the building’s only apartment with a private rooftop terrace, and that terrace includes a kitchen and a hot tub. The price is $9.75 million.