Streeterville apartments are still in high demand. With condo constructions on the decline, we are setting demand for rental apartments in Streeterville on the rise which has resulted in rents are on the rise. Rent in class a buildings are up to $2.43 a square foot (or a 9.46% increase from a year ago). Luxury apartment rentals are at an average of $2.68 a square foot, up 12.61% over a year ago. Most real estate experts expect the rent to increase into early 2012.