Students and staff are back at Belmonte Middle School this week with a newly renovated building. The $18 million renovation of the Dow Street school is complete with the exception of a few “punch list” items, according to Wendy L. Reed, chairwoman of the School Committee and the School Building Committee. The project included a major upgrade of the building’s mechanical systems, including replacement of the plumbing, electrical, heating, ventilation, and fire-alarm systems. It also involved construction of a new, insulated building exterior, a new roof and windows, and a new drainage pump system designed to end the water seepage into the building that was the original impetus for the project. The building has also been made fully handicapped-accessible. Fifty-six percent of the project’s costs are being funded by the Massachusetts School Building Authority. “It’s very exciting after all this time to finally see the end result,” Reed said. “It brings a little pride to the community when the schools look nice.” On Sept. 14, from 10 a.m. to noon, the public is invited to an open house at the school that will include brief tours of the building.