Building owners and tenants are often characterized by conflicting interests and split incentives, hindering joint efforts towards energy-efficient buildings. However, both parties play a vital role in embedding sustainability into the built environment and ultimately have common ground that can be leveraged to achieve shared goals. The Urban Land Institute’s (ULI) Tenant Energy Optimization Program (TEOP) and the Institute for Market Transformation (IMT) and U.S. Department of Energy’s (DOE) Green Lease Leaders program share complementary, actionable steps for landlord-tenant collaboration in advancing sustainability in leased spaces. Green Leasing as Part of a Sustainable Tenant Fit-out: Tenant Energy Optimization Program and Green Lease Leaders Program provides an overview of TEOP and Green Lease Leaders, highlighting how the two programs can work together to offer a robust roadmap for landlord-tenant energy efficiency achievements.