 The La Salle Hotel's parking garage was the first high-rise parking garage in the Loop, constructed in 1917 at the corner of Washington and LaSalle Streets and remaining in service until its demolition in 2005.In the 1920s old buildings were purchased in the area and converted to parking structures.More high-rise garages and parking lots were constructed in the 1930s, which also saw the advent of double-deck parking.