Northeast Building Products, LLC. (“NBP”) is a Philadelphia based manufacturer of energy-efficient windows and doors. Founded in 1975 by Irv and Elaine Levin, NBP was purchased by Alan & Elaine’s son Alan and his wife Fran in July of 2002. After 16 years of steady and unprecedented growth Alan and Fran led NBP into the family of businesses owned by Harvey Building in November of 2018. Under Harvey's guidance and leadership, NBP continues to serve customers east of the Mississippi, including distributors, dealers and contractors, and produces thousands of windows per year. NBP operates in state-of-the-art facilities and employs over 700 people.