Urban sprawl and urbanization are increasing both globally and in Slovenia. These processes have a negative impact on the natural hydrological cycle. Although water circulates on a global scale, the current water management system is based on a linear concept that can be simply described as extraction, use, and disposal. This type of managing water resources is not sustainable, as it limits the possibilities for reuse of wastewater, as well as the recovery of resources contained in water. In this thesis, we investigated different measures for singlehousehold and multi-household buildings and hotels that would contribute to a more sustainable water management approach. We focused on the measures that enable the reuse of rainwater and wastewater and measures that reduce freshwater consumption. The main goal of the thesis is to develop a water efficiency certificate, which can be used for singlehousehold and multi-household buildings and hotels, to determine their level of water sustainability. The introduction of a water efficiency certificate for buildings could lead to the usage of more sustainable water management approaches.
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