The world's most expensive streets

Hot spot: Even-numbered side of the street between Prada (No. 10) and Gucci (No. 60).
Rent: $660 per square foot.
State of the market: The touristy Champs Élysées fetches higher rents, but Avenue Montaigne, where Christian Dior opened his first couture house in 1946, is the crème de la crème when it comes to high fashion: Chanel, Louis Vuitton, and Chloé are all here; Dior still maintains its headquarters at No. 30. The street has seen little turnover since 2006, and there are no available stores larger than 2,150 square feet, which has pushed some stores to nearby Rue Saint-Honoré.

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