1 It's private, unless, of course, there is a penthouse next door.
2 You can be sure you're above everyone else.
3 Heat rises, so you can take advantage of the rest of the building's. 4 Everybody wants to go to parties in a penthouse, so you'll never have refusals.
5 Great views.
6 The air is fresher.
7 The higher you are, the quieter it gets.
8 The concierge is more deferential.
9 You can convert the roof garden into a helipad.
10 Rising damp will never get up to your level.
