CHICAGO—The city’s office market is set to expand over the next few years as developers put the finishing touches on several new office towers rising along the Chicago River, and downtown landlords are looking for ways to distinguish their properties as the competition for tenants heats up. 

Union Investment Real Estate GmbH, the owner of 111 South Wacker, for example, has transformed the operations and maintenance procedures at the 51-story, 1.1 million square foot office tower enough to achieve LEED Platinum certification from the US Green Building Council, the highest level of recognition for green buildings. 

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