The publication was developed for all user levels, including first-time users, veteran code users and other professionals such as architects, designers and contractors. It explores the most important concepts of the International Green Construction Code (IgCC®) and the most commonly encountered building practices in a straightforward, easy-to-understand manner. Users of the code can achieve a more complete understanding of the code’s requirements and the intent and application behind those provisions. New users of the code can build a solid foundation for learning and applying the code’s requirements. This valuable publication is an up-to-date, step-by-step guide to understanding and using the 2021 IgCC’s provisions.