The Children's Hospital has begun the construction of a 10-story, 350,000-square-foot addition. The $230 million expansion of a new patient tower initially will have 124 beds, with two floors of shelled space for additional future beds, bringing the total number of patient beds at Children's to around 500 upon full completion. The expansion also is expected to bring approximately 500 new jobs to the hospital's workforce. Children's anticipates admitting patients in the LEED-certified tower beginning in late 2012.