Retrofits are moving from optional to expected. Teams are being asked to cut emissions, plan capital upgrades earlier, and keep buildings operating with minimal disruption. The challenge is choosing the right retrofit package in advance, so budgets, scopes, and timelines are proactive rather than reactive. This session shows a practical way to compare retrofit options quickly and make decisions with confidence. We will test envelope upgrades, electrification pathways, heat recovery, and controls through rapid scenario analysis so the impacts on operational carbon, energy use, peak demand, and capital cost are visible side by side.