Officials in neighboring Naugatuck Valley cities formally approved the sale of municipally-owned land needed for a large, planned Amazon warehouse.

Naugatuck’s Board of Mayor and Burgesses approved the transaction on May 10, while Waterbury’s Board of Alderman did the same on May 6.

The 10.5-acre parcel that straddles the two cities’ border fetched a combined $2.5 million, according to information presented to Waterbury officials.

Bluewater Property Group, a 30-year-old development firm based in suburban Philadelphia, hopes to build a distribution facility on a 157-acre site that includes the city-owned land, bought several years ago to ensure vehicular access to the site through the Naugatuck Valley Industrial Park.

The company said it has already lined up Amazon as a tenant.

“This [sale] gives Bluewater the ability to go out and spend the millions of dollars needed to understand the site, understand the feasibility and ultimately build” the distribution center, Waterbury Economic Development Corp. interim CEO Thomas Hyde told Waterbury aldermen May 6.

The distribution center proposal has met with enthusiastic support from local officials and even Gov. Ned Lamont, who praised it as a sign of “real momentum” in efforts to revive the troubled, post-industrial economies of Naugatuck Valley cities.