Rent: $860 per square foot.
State of the market: Bond Street - which is technically two streets, New Bond and Old Bond - has been a fashion epicenter for wealthy Londoners since the 18th century; today, everyone from Asprey to Zegna is here. Rents have jumped 50% over the past four years, and Harry Winston's recent move to No. 171 set a record at an estimated $1,340 per square foot for its front-of-store space. Chanel and Dolce & Gabbana hold court in the most desirable stretch, but nearby Conduit and Bruton streets are picking up overflow tenants.
NEXT: Avenue Montaigne, Paris