In this paper, LCA results of buildings were examined in order to build up a database in the future serving to generate bench- marks for early planning phases. Especially innovative research and development is aimed at significantly reducing the resource con- sumption of future buildings. In order to make these ambitious tar- gets achievable, benchmarks are needed as a starting point. The results show that the database of LCA results of certified buildings provide a great value to define benchmarks. However, the data quality in terms of data structure, detail level, etc. is cur- rently not sufficient to derive general and automatically calculated benchmarks today. To ensure this in the future six recommenda- tions for improvements in the data preparation and database struc- ture should be followed. The template developed in this study is suggested as a standardized template to structure, collect, evalu- ate and provide LCA results for new buildings. The interfaces of the different LCA software should be standardized in order to pro- vide the template with the harmonized data. The different distri- bution of the cost groups often lead to inconsistencies in the re- sults and should be adjusted. Automated quality checks should be available to monitor the planning process and to ensure a high- quality database and data integrity. Finally the LCA results should easily be extended to new versions of the ÖKOBAUDAT. Starting from this initial database, benchmarks for early plan- ning phases could be developed in the future. The more detailed the database, the more comprehensively the benchmarks can be specified for use in the planning process. One step to tackle the resource consumption and environmental impacts of buildings as described in chapter 1 is to provide LCA benchmarks in early plan- ning phases. The interaction between operation and construction is particularly important here. The great potential to reduce the environmental impacts of the construction phase without increas- ing them in the operation phase is being investigated in the Col- laborative Research Centre SFB 1244 “Adaptive Building Skins and Structures for the Built Environment of Tomorrow”at the Univer- sity of Stuttgart, Germany, which uses an ultra-light adaptive de- sign. However, it is necessary here to avoid possible faults in con- struction directly in the planning phase. The work provided in this paper will serve as a foundation for the ambitious goal of reducing the resource consumption and environmental impacts of building skins and structures for innovative future buildings.

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