Construction is underway on the third data-center building for Amazon Web Services at the southeast corner of Britton Parkway and Hayden Run Road in Hilliard.
The first 183,000-square-foot data-center facility was completed in 2016.
The second building, which previously was documented as 153,000 square feet, was constructed in 2017 south of the first data center.
The third building is south of both facilities.
Amazon Web Services has received a building permit and started construction, said David Ball, director of communications for Hilliard.
Ball said he could not disclose the size of the buildings or other particulars about the data center because of the city's agreement with Amazon.
Amazon Web Services has a practice against "commenting on our future road map," spokeswoman Lauren Lynch said last week.
When the project was proposed in 2015, five buildings were part of the plan on the land an Amazon subsidiary, Vadata, purchased four years ago.
According to Franklin County Auditor's Office records, Vadata closed on the parcel at the southeast corner of Britton Parkway and Hayden Run Road on Feb. 25, 2015, for $8,296,030.
The acquisition of the parcel came two days after Hilliard City Council approved an incentive to woo the online retailing giant to build the data center in Hilliard.
On Feb. 23, 2015, council voted 6-0 to waive permit fees of $122,400 for each of five proposed buildings – equivalent to $612,000 – and waive a fee of $168,000 for plan reviews and inspection fees.
The city also waived water- and sewer-capacity fees amounting to about $600,000, according to city leaders at the time.