Real estate decisions are never neutral. Long before outcomes show up as housing shortages, climate exposure, displacement, or instability, they are locked in through zoning codes, financing structures, governance rules, and institutional incentives. Who gets protected. Who absorbs risk. Who gets heard. These choices shape cities quietly, and their consequences last for decades. What We Choose To Build is about understanding how those choices actually work. This book examines real estate not as a collection of isolated projects, but as a system of power, accountability, and consequence. It moves beyond sustainability checklists and ESG labels to ask harder questions about who decides, what gets measured, and what gets left out. Drawing on history, policy, finance, governance, and real-world case studies, it shows why well-intentioned decisions so often fail, and why others quietly succeed. At the center of the book are two practical frameworks, HEADS UP and STRIVE, designed to help readers see how social outcomes, environmental limits, and governance structures interact as one system. From housing, workforce development, and data privacy to investment strategy, proxy voting, and boardroom accountability, the book makes one argument clear: intentions do not govern outcomes. Structures do. Written for practitioners, investors, policymakers, and anyone operating at the intersection of real estate and public consequence, this is not a manifesto and not a prediction. It is a field guide for decision-making in a world defined by climate risk, demographic change, and institutional mistrust. Markets will continue to shape cities. The question is whether they do so deliberately or by default. This book is for those who understand that what we choose to build determines far more than what gets built.