Built for Zero is a methodology, a movement, and proof of what is possible. The movement is made up of more than 80 cities and counties that have committed to measurably ending homelessness, one population at a time. Using data, these communities have changed how local homeless response systems work and the impact they can achieve. Thirteen of those communities have ended homelessness for a population by reaching a standard called functional zero. More than half of those cities and counties have achieved reductions in the number of people experiencing chronic and veteran homelessness. Together, they are proving that moral courage, data-driven thinking, and a system-wide approach can build a future where homelessness is rare overall and brief when it occurs.