Before a demolition or tear-down can occur, one must obtain relevant demolition permits that define the exact demolition processes which must be adhered to. These permits are also often required for partial demolition due to changes concerning the form or quality of a building. Before demolition, the SiGeKo (Health and Safety Protection Coordinator) must undertake all health and safety protection activities.One can perform so-called ‘coring’ on a building, in which only the historical facade is preserved. Furthermore, core remediation can be conducted in which all remediation activities are performed in order to restore a building and to return it to a nearly new state. For this, often all parts up to the supporting walls and ceilings of the building are restored.If, during the demolition, contaminated materials, such as asbestos, artificial mineral fibres, PCBs, formaldehyde, wood protectants, PAHs, heavy metals and the like are found, these must be disposed of separately. For this, we perform a pollutant investigation of the buildings, whereby we research the history of construction and its utilisation history, create a sampling plan, and conduct a technical investigation. We create a pollutant field book as a part of the assessment and deconstruction planning process. From this, a deconstruction concept is developed, which incorporates an appropriate safety concept. Following this, we compile a concept of disposal and are then able to formulate a cost estimate.