First, we check the building file to determine whether all existing structural installations are actually approved or whether unauthorised extensions, additional storeys, or changes of use exist.
For unauthorised structural components, it is regularly assessed whether subsequent approval appears realistic or whether an official demolition order must seriously be expected.
Depending on the assessed risk, a corresponding deduction is applied to the value of the affected part of the building, in the worst case up to the complete exclusion of the unauthorised structural component from the valuation.
Even an existing informal tolerance by the authorities without formal approval does not establish permanent protected status and should be identified in the appraisal report as an ongoing risk.
Before purchasing a property, it is always advisable to carefully review the building file at the relevant building authority in order to avoid unpleasant surprises later due to unauthorised building substance.
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