Use of house price indices, based upon samples which have greatly fallen in size with falling housing transactions, casts further doubt on the validity of using free indices for the important task of revaluing the assets underlying mortgage and property portfolios. Those buying and selling mortgage books also need the best possible measures of house prices, as do consultants, estate agents and surveyors. Acadametrics works with Zoopla, where the cost of an AVM valuation is warranted, but, for regular revaluations, based upon existing portfolio valuations or upon a Zoopla or client-preferred AVM valuation, Acadametrics offers low cost solutions as follows:

Acadametrics Prices and Transactions (APAT). Whilst the lenders indices provide mortgage offer valuations at regional level, compiled on a quarterly basis. Acadametrics uniquely provides the only data based upon real transacted prices at regional, county/London borough levels (or post code sector level) which are available monthly. APAT provides the smoothed average of every LR transacted price at region and county/London borough, or post code sector, level by property type, for client in-house use.

Property Portfolio Revaluation – our service requires a loan by loan, or property by property, download to our confidential server and uses APAT to return current individual property prices with standard deviations, using methodology described in our Statistical House Price Calculator; enables clients to identify results outside acceptable confidence limits for which an individual AVM valuation may be deemed appropriate; optionally, we can provide such AVM prices and forced sale prices.

Confidence Interval Tables specifically designed for organisations using traditional indices or APAT for internal revaluations, based upon the spread of prices within the APAT averages, presented as tables of standard deviations, listing values one and two standard deviations below and above the APAT averages; a representative spread was obtained by an analysis of duplicate sales recorded by the Land Registry.

statistical House Price Calculator (also available as a stand alone Excel package) provides APAT-based revaluations, with the number of transactions employed in the original and current APAT values, and standard deviations as in the Confidence Interval Tables; useful e.g. for portfolio owners checking individual values; available for clients to adapt and brand for their own use, updated monthly.

Further information is provided within a series of downloadable documents free of charge here.