Tight investment budgets and high demands on sustainability lead to the classic conflict of objectives in projects. Especially in Target Value Design (TVD), the focus lays strongly on cost compliance. As a result, environmental goals have little chance of being achieved if they are viewed as an adjunct to functionality and quality. Even short-term consideration of LCA factors or energy efficiency in the early stages of design cannot resolve the trade-off between economic and environmental goals. Consequently, it is unclear how to make decisions when environmental and economic goals appear to be incompatible. It is also unclear how to incorporate social factors into TVD. Target Sustainability Design (TSD) was developed to address these issues. To do this, TVD has been broken down into its components and combined with the factors of strong sustainability in such a way that environmental and social goals become an integral part of the TSD methodology. The goals of all three dimensions of sustainability are not at odds with each other when using the TSD method, but can only be achieved together. This paper presents the composition of TSD and illustrates how it works with a case study.