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Area-wide development viability appraisals: the concept of threshold land value within a UK planning context

Wyatt, P. ORCID: https://orcid.org/0000-0002-9091-2729 and McAllister, P., (2013) Area-wide development viability appraisals: the concept of threshold land value within a UK planning context. Working Papers in Real Estate & Planning. 09/13. Working Paper. University of Reading, Reading. pp21.

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Abstract/Summary

Area-wide development viability appraisals are undertaken to determine the economic feasibility of policy targets in relation to planning obligations. Essentially, development viability appraisals consist of a series of residual valuations of hypothetical development sites across a local authority area at a particular point in time. The valuations incorporate the estimated financial implications of the proposed level of planning obligations. To determine viability the output land values are benchmarked against threshold land value and therefore the basis on which this threshold is established and the level at which it is set is critical to development viability appraisal at the policy-setting (area-wide) level. Essentially it is an estimate of the value at which a landowner would be prepared to sell. If the estimated site values are higher than the threshold land value the policy target is considered viable. This paper investigates the effectiveness of existing methods of determining threshold land value. They will be tested against the relationship between development value and costs. Modelling reveals that threshold land value that is not related to shifts in development value renders marginal sites unviable and fails to collect proportionate planning obligations from high value/low cost sites. Testing the model against national average house prices and build costs reveals the high degree of volatility in residual land values over time and underlines the importance of making threshold land value relative to the main driver of this volatility, namely development value.

Item Type:Report (Working Paper)
Divisions:Henley Business School > Real Estate and Planning
ID Code:32597
Publisher:University of Reading
Publisher Statement:The copyright of each Working Paper remains with the author. If you wish to quote from or cite any Paper please contact the appropriate author. In some cases a more recent version of the paper may have been published elsewhere.

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