The company bought the building, between 60th and 59th Streets, in 1987, then renovated and expanded it.
Many companies also are purchasing their own buildings and renovating them.
The company also renovated the mall interior in 2008.
One is a 138-acre parcel that had a 277,000 square foot building on it, which the company renovated and occupied in January.
Over the years, the company sold and renovated older properties to bring them up to the same standard as more recently built properties.
But in 1976 she was offered the use of Citizens Hall, which the company has renovated and made its permanent summer home.
That company renovated it for office use in 1947.
So far, the company has renovated 72 buildings with 900 apartments using $78 million in public and private funds.
Further, the company has renovated many stores and moved some operations off the mall.
The company both renovates older buildings for suitable use, and builds new ones.