Newtown officials are backing plans to turn the former Taunton Press campus into 80 apartments and new headquarters for Claris Design Build. The developer agreed to add sidewalks connecting the 13-acre site to the nearby Fairfield Hills campus, a key concern for the town. The project includes two renovated buildings, a new apartment building, and features like a gym, walking trails, and 20 percent affordable units. Environmental concerns remain over nearby Deep Brook. A final vote is set for May 15.