This single-family landmarked brownstone is undergoing an energy-efficiency retrofit that includes passive house strategies using high-performance windows and skylights and insulation of exterior walls. Historic stairs are being refurbished and new passive house skylights and hatch will provide natural light to the core of the home. While passive house detailing at the front and rear interior facades will eliminate drafts. A kitchen and bathroom renovation and new flooring throughout will update the 19th century home to perform as a state-of-the-art home. The brownstone is currently being resurfaced and solar panels installed by Brooklyn Solarworks. It takes a team!