All Scotland Office property is rented and therefore the property portfolio value is nil. However, Dover House, which is held as an historic leasehold, is independently re-valued by the Valuation Office Agency, on the basis of existing use value, in accordance with the appraisal and valuation manual of the Royal Institution of Chartered Surveyors. The most recent valuation undertaken in 2005-06 valued the building at £1,085,000.