B.I.G. (BAUEN. IMMOBILIEN. GARTEN) is the largest trade fair in northern Germany, covering the areas of construction, real estate, garden and furnishing. Visitors will find a wide range of products, forums with free lectures as well as expert advice from experts on current topics such as protection / security, energy-efficient construction and smart home. Since 2017, the BIG has been taking place parallel to the leisure trade fair abf.