In a valuation, the actual market value and mortgage value of your property are determined. For condominiums and single-family and two-family houses, the cost value method is usually used.
Cost Value = Land Value (Plot size x land guideline value) + Building Value (Cubic meters of enclosed space x construction costs or living space x price per m² living space on average).
For larger properties with multiple units, the so-called income value method is used. Here, the annual net cold rent is taken as a basis and multiplied by a factor.