When is the tax value too high?

You can ask for the tax value of a primary dwelling to be reduced if you are able to document that it exceeds 30 percent of the property's market value.

For secondary dwellings, the limit is 96 percent for the 2016 income year. For the 2017 income year you can claim a reduction of the tax value on a secondary dwelling if the value exceeds the market value.

Definitions of primary and secondary dwellings.

Information on the documentation that will be required. 

See SSB's model for calculating the capital value of housing.(in Norwegian)