Sky Development also purchased an adjacent parcel behind the building to construct a parking garage.
Those efforts included attracting a proposal for a $1.4 billion family entertainment, office and retail complex to an adjacent parcel.
Merck has also leased an adjacent one-acre parcel for possible future development.
It would be demolished not to make way immediately for a new building on its site but to enhance development of adjacent parcels.
The county also bought the adjacent 36-acre parcel for $3.2 million.
The company bought six adjacent parcels, each with buildings of about 20,000 square feet on one or two acres.
Plans call for razing the existing buildings on the 4.7-acre site and acquiring an adjacent 2.8-acre parcel.
It is based on the same kind of zoning the city recently approved for an adjacent parcel.
Initially, a new building was to be built on an adjacent parcel of land.
On the adjacent parcel is another plaza containing a new Wal-Mart.