Current construction project planning practices take little account of the interdisciplinary, iterative nature of the design process. This, combined with work packaging devised to suit construction and other influences on design planning, leads to a compromised design process containing inevitable cycles of redesign. This paper describes the Analytical Design Planning Technique (ADePT), a project planning methodology that helps to overcome these problems by providing a structured approach based on information flow rather than the production of design deliverables. It takes in account the iterative nature of design enabling coordinated, integrated design solutions to be developed within budgetary and time constraints