The Haus-Bau & Energie in Ilsenburg is a regional trade fair that focuses on the topics of house construction, renovation, energy efficiency, and sustainable living solutions. It takes place in the Harzlandhalle in the town of Ilsenburg, a picturesque community in the Harz district of Saxony-Anhalt. The fair was first launched in the 2010s and has since established itself as a key event for everyone interested in home building, renovation, and energy-efficient living solutions. It offers its visitors advice on the topics of planning, financing, conversion and expansion, modernization, insulation, and furnishing as well as offers from doors and windows to awnings, carports, and conservatories, from wall construction to prefabricated construction to wood, from roof coating to wall drying, from pellet heating to photovoltaics. All in all, Haus-Bau & Energie in Ilsenburg is an important regional event for everyone who is interested in sustainable house construction, renovation, and energy-efficient living solutions. A very special event is the 20th anniversary edition of the Haus-Bau & Energie, which takes place on 3 days from Fri., 21.03.2025 to Sun., 23.03.2025 in Ilsenburg.