With rents soaring and properties selling fast, the expatriate hub of Dubai is in the throes of a housing boom bolstered by rich emigres that has buoyed investors and burdened tenants. "The leasing market in the last year has massively changed. It is great for landlords but it's not so good for tenants," says leasing manager at the brokerage firm Betterhomes, Jacob Fletcher. IMAGES AND SOUNDBITES