Our colleagues Roland Németh, Miklós Balaskó and Béla Szivák gave a presentation on data-based architecture at the 1st Ybl Conference on Built Environment at Óbuda University. Our colleagues presented data-driven simulation design, which allows us to find the architectural and technical solutions that result in the highest efficiency at the lowest cost already in the early stages of development. The decision support system developed by our office uses simulations to follow the entire life cycle of a construction project, including operation, and helps to determine the expected costs and revenues of a project.