B.I.G. 2027 is a consumer-facing fair focused on building, interior living, and garden improvement, serving visitors who are renovating, building, refurnishing, or preparing outdoor spaces for the new season. It is a leading building and garden fair in northern Germany and a practical platform for comparing products, solutions, and service providers.

The event is structured around the three themes of BAUEN, INTERIEUR, and GARTEN, covering renovation and construction ideas, furniture and accessories, themed gardens, expert talks, and on-site consultation. It is staged on the Hanover fairground during the same period as ABF, operating as a distinct branded event with its own visitor proposition.