NY Building Systems Consultant Inc (NYBSC) delivered an integrated energy and decarbonization strategy to position 630 Flushing Avenue as a high-performance, LL97‑ready estate. The project involved the adaptive reuse and modernization of a 599,291‑square‑foot industrial facility on Flushing Avenue in Brooklyn, originally the founding site of the Pfizer Corporation and now transformed into a multi‑tenant hub for manufacturing, food production, and creative commercial office use. Our engineering team completed a full ASHRAE Level II Energy Audit, performed detailed LL97 GHG emissions limit calculations, and identified ten targeted Energy Conservation Measures (ECMs) that improve system efficiency and support regulatory compliance. Additionally, the team performed  with heat pumps, high-efficiency RTUs, VFDs, VAV systems, solar PV with solar thermal, LED lighting, and high-performance window films. Together, these measures are projected to significantly reduce annual operating costs and reduce over 1,221 tons of CO₂ per year across phase-I and 1,185.4 tons of CO₂  per year in phase-II implementation, providing insight with a clear, investment-grade roadmap for compliance, carbon reduction, and long-term asset value. The study culminated in a data‑driven capital plan outlining implementation costs, available incentives, and financial recommendations, providing ownership with a clear, actionable roadmap for high‑impact energy upgrades, long‑term carbon reduction, and enhanced operational performance across this newly modernized zone.