Six structures totalling 961,648 sq ft stand on 141.308 acres at 4120 Scioto Darby Creek Road in Hilliard, four of them data halls between 215,562 and 266,528 sq ft, dated 2024 and 2025 and typed research and development by the Franklin County auditor. Amazon paid $15.29m for the ground in January 2021 and began construction that spring. What makes the parcel unusual is the generating plant going up inside it: a 72.9 MW solid-oxide fuel cell facility of 228 Bloom Energy units on about 6.4 acres at 4186 Scioto Darby Creek Road, which Ohio Power Company will own and operate while Amazon Data Services funds it under a private agreement. The Ohio Power Siting Board certificated it on 22 September 2025; the City of Hilliard appealed the Ohio EPA permit that October and sued in February 2026, with plant construction starting January 2026 against a September 2027 target. The campus itself is fully taxable, at $118,868,700 appraised for 2025 and a net bill of $3,927,164.12.
The rated capacity of a solid-oxide fuel cell generating plant of 228 Bloom Energy units at 4186 Scioto Darby Creek Road inside the campus, owned and operated by Ohio Power Company. It measures on-site generation, not the data centre's computing load.
Which structures does Franklin County record?
Six, totalling 961,648 sq ft: data halls of 266,528, 258,320, 216,162 and 215,562 sq ft dated 2024 and 2025, plus a 2,964 sq ft and a 2,112 sq ft ancillary building.
How is the campus taxed?
In full. Exempt land, improvements and total are all zero for 2025, appraised value is $118,868,700, and the net annual tax paid was $3,927,164.12 in tax district 050, City of Hilliard.
What is the dispute over the fuel cell plant?
The Ohio Power Siting Board granted its certificate on 22 September 2025 under a statute that removes such projects from local approval. Hilliard appealed the Ohio EPA permit on 31 October 2025 and filed suit in February 2026; construction began in January 2026 with operation targeted for September 2027.
When did Amazon buy the land?
January 2021, for $15.29m. Construction started early that year and five of the six structures were finished in 2024.