When a particular user enjoys special benefits, such as extraordinary financing, agglomeration benefits, or grandfathered zoning, then the value may be higher than market value, and the value is considered to be an investment value.
The current edition of International Valuation Standards (IVS 2007) re-states the IFRS definition of Value-in-Use, which would allow for either a higher value than market value or a lower value than market value:
As defined in IVS2, Investment Value is the valuation equivalent of the accountancy concept of Value-in-use. Whereas IFRSs define the accountancy concepts of Fair Value and Value-in-Use in operational terms, IVSs define Market Value and Investment Value by way of generalised definitions.