Carpet cleaning prices are determined by the number of rooms, hallways and staircases you have to be cleaned. Rooms are counted as areas up to 200 square feet, rooms larger than this are charged a proportionally higher rate. Individual staircases in split-level houses are charged at a lower rate than those in regular homes. Area rugs are charged by the square foot, and upholstery cleaning prices are determined by the furniture type. A minimum charge of $99 is in effect for all jobs.