Data centers in Fairfield County, Connecticut: 1 project mapped

Imagery: Esri, Maxar

Fairfield County's one data center is an old building, not a new fight. CyrusOne's Norwalk facility, known as NYM5, at 6 Norden Place, was built by Cervalis and opened in February 2014. CyrusOne took it over in 2015 as part of a roughly $400 million purchase of Cervalis that also brought sites in New York, New Jersey and Stamford. The building has since been sold to an institutional investor for $58 million, with CyrusOne leasing back the whole 168,000-square-foot, single-tenant building long-term, according to the broker Five 9s Digital.

The county may get a second one. In May 2026 the Norwalk-based operator 365 Data Centers said it was pursuing a letter of intent to build in Trumbull, part of a national partnership with Florida real estate firm Aphorio Carter to develop about 200 megawatts of AI-ready data centers. Hartford Business Journal reported the Trumbull project is at an early stage, with no property or timeline disclosed and contracts still needed; the partners said projects could open within nine to 24 months.

Connecticut's legislature let two bills that would have affected data centers, one repealing the state's tax incentives and one regulating centers built next to power plants like Millstone, die without a vote this year. What happens next in Trumbull depends on whether 365 Data Centers signs its letter of intent and brings a site forward.

Every project above is drawn from public records, filings and local reporting. Each row links to what it is based on. Statuses change, so check the source date before you rely on one. Found something wrong? Write to [email protected] and it gets fixed.