The latest listing of the 10 most expensive streets in the world (published by The Wall Street Journal's Wealth Bulletin) includes Wolseley Road, Point Piper in Sydney coming in 9th place, at $29,000 a square metre - based on the recent sale of the non-waterfront, hillside property Craig-y-mor for $32.4 million. The most expensive address on the list is Avenue Princess Grace in Monaco where apartment sales of more than $US40 million translate to an incredible $190,000 a square metre. If we sold our home we could just about afford to buy a walk-in wardrobe in one of those apartments! On the other hand, the are untold millions of people in the world living on the streets or in slum conditions, so our housing cost would be much closer to the "top 10" than the world average.