The purpose of this paper is to review the historic evolution of dual rate valuation practice in the UK from the nineteenth century to the present time.
The paper is based on a review of published books, articles and letters dating from 1852.
The study establishes the fact that single rate was the only method in use in the nineteenth century and notes the overlap of two methodologies and beliefs in the first half of the twentieth century. It confirms that by the late 1930s dual rate had replaced single rate and an “establishment opinion” on the essential need to value leaseholds dual rate on the basis of a set of commandments had emerged without any apparent disagreement. This position, with some debated refinements for the effect of tax and treatment of variable profit rents, is shown to continue through the twentieth century and is reaffirmed in standard textbook teaching at the start of the twenty‐first century. The review touches on the criticisms noted by academics in the latter part of twentieth century. It identifies as a key issue the continuing persistent misconception amongst UK valuers that there is a reinvestment assumption in the present value of £1 per annum.
Dual rate principles are shown in the paper to be untenable and the profession is advised to remove the method from future training of valuers and to cease to make any use of the method in the valuation of leasehold investments.
Mackmin, D. (2008), "Dual rate is defunct? A review of dual rate valuation, its history and its irrelevance to today's UK leasehold market", Journal of Property Investment & Finance, Vol. 26 No. 1, pp. 80-95. https://doi.org/10.1108/14635780810845172Download as .RIS
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