Commercial construction continues to defy the real estate slowdown in the Orlando area. This week The Shermen Group LLC, a full-service real estate company with offices in New York, Boston and Celebration, breaks ground on a $17 million project called Celebration Blvd. Medical Center. The 90,000-square-foot, four-story medical-office center, located on Celebration Boulevard, has frontage along Interstate 4 and will house doctors, other medical professionals and healthcare providers serving residents of Celebration, Osceola County and surrounding areas.