…And the number of walk-ups sold over the past year has jumped nearly 64 percent, whereas the increase was 22 percent for units in full-service buildings, according to the appraisal firm Miller Samuel. Over the past year, Miller Samuel also found that the price of walk-ups has surged nearly 22 percent, versus less than 2 percent for units in full-service buildings…

…The average price for condominiums in Prospect Heights is $621 per square foot, according to Miller Samuel…