ULI Randall Lewis Center for Sustainability in Real EstateULI (Urban Land Institute) Randall Lewis Center for Sustainability in Real Estate is dedicated to creating healthy, resilient, and high performance communities around the world. Through the work of its Greenprint, Building Healthy Places, and Urban Resilience programs, the Center provides leadership and support to real estate and land use professionals to invest in energy efficient, healthy, resilient, and sustainable buildings and communities.