The Town of Hopkinton is addressing rapid population growth with the development of a new 170,000-square-foot Charleswood Elementary School, designed to alleviate overcrowding and modernize facilities. Targeting Zero Energy and LEED Silver certification, the project prioritizes sustainability with a focus on low energy use, indoor air quality, and future adaptability. Following a detailed HVAC evaluation, ground source heat pumps paired with solar PV for Net Zero Energy were identified as the most cost-effective solution, supported by substantial federal and state incentives for clean energy.