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For condominium units, the tax office preferentially uses comparable prices of similar units in the same building or residential area to determine a realistic value.
If sufficient comparable data is lacking, for example in the case of very individual or rare types of units, the tax office switches to the cost approach, which places greater emphasis on the structural condition.
Even for condominium units, an expert's appraisal report can be used to prove a lower actual market value if individual defects or particularities exceed the standard flat-rate approach.
The basis of the valuation is always the declaration of division, from which the separate property, the co-ownership share in the common property, and any special usage rights, for example to a parking space or garden area, are derived.
The share in the maintenance reserve fund of the condominium owners' association also constitutes an independent asset, which must be considered separately for inheritance tax purposes in addition to the actual property value.