The is nearly 40 percent complete as of Dec. 1, Library Director Tom Viti said this week.
In a brief update, utility connections on High Street have been finished, and TLT Construction and sub-contractors are working on spray-foam insulation, Viti said.
Crews also continue to work on drain line installation and exterior masonry work.
Meanwhile, roof shingles and gutters are almost complete, and mechanical, electrical and plumbing work continues on the second floor.
The project, overall, remains on schedule, Vitis said.