Keystone Property Group has owned the three-building Dadeland Towers North complex in Miami's Kendall neighborhood for over 10 years.

The towers make up half of an office park on South Dadeland Boulevard adjacent to the Dadeland South Metrorail Station, the other half of which was owned by AvMed Inc.

Pennsylvania-based Keystone has approached AvMed over the years to gauge the health insurance company's interest in selling its chunk of the park. It wasn't until this year that AvMed finally agreed.