High Quality Content by WIKIPEDIA articles! Grand Plaza I is a residential skyscraper in Chicago. The 57 story building was completed in 2003 at a height of 641 feet (195 m) when measured from its decorative spires. Grand Plaza I is one of the tallest all-residential buildings in Chicago and contains 481 luxury apartment units. It is also the tallest building in the Chicago zip code 60610, the zip code with the most high-rises in the city.