This publication provides an overview of off-site renewable energy options, and step-by-step instructions for real estate professionals to purchase off-site renewable energy for a building or portfolio, with several options for contracting to fit different real estate development strategies, ownership horizons, tenant requirements, and energy, sustainability, and financial goals. This guide is intended for U.S. real estate professionals in procurement, asset management, property management, engineering, and environmental, social, and governance (ESG) who have the mandate to execute on the corporate sustainability strategy and energy purchasing.