The P&Z voted unanimously Thursday night to approve the "8-24 report" filed by First Selectman Jim Marpe, which would allow the library to move forward with a planned 35-foot expansion northward on the green.
The approval, however, is only for the land-use request and not a formal expansion, which has yet to be officially proposed by library officials.
The general outline of the plan, roughly projected to cost $20-25 million, would include include an additional 12,654 square feet to the existing 43,916-square-foot building, as well as some changes to the surrounding landscaping and parking.
Marpe has said the expansion would be consistent with the town's Plan of Conservation and Development, by providing opportunities for more gathering space, more evening events and cultural expansion.
At a hearing last week, nearly a dozen people spoke in favor of the plan, including Julie Belaga, a former state representative who also was chairwoman of the P&Z from 1971-75.