An application domain that may experience signifi cant improvements by increasingly relying on semantic technology, is the domain of architecture, engineering and construction (AEC). This domain has a high amount of very diverse kinds of information, making systems capable of reasoning about this information highly valuable as they enable an improved design decision support. This paper briefly documents part of our investigation of the applicability of semantic technology for the AEC domain. This has proven a valid approach that has an important potential in improving information management and design decision support in the AEC domain.