Council Tax: Wales
The question
To ask the Chancellor of the Exchequer, pursuant to the Answer of 27 November 2024 to Question 15200 on Council Tax: Wales, when the Valuation Office Agency will publish this information.
Answered by James Murray
The Valuation Office Agency (VOA) published the information on gov.uk on 31 March 2025:
How model assisted valuation delivers large-scale property valuations - GOV.UK – A high level overview of how the VOA uses model assisted valuation and mass appraisal to support large-scale valuation. This links through to further information:
External assurance of the VOA automated valuation model (AVM): VOA response - GOV.UK - This page sets out the VOA response to external review and assurance of the VOA AVM developed to support Wales Council Tax reform.
More_information_on_mass_appraisal_and_AVM.pdf - More information on how the VOA is using mass appraisal to support Council Tax reform in Wales and on the AVM.
Model_specification_document.pdf – A document setting out the data utilised in development of the AVM for a future revaluation of Council Tax in Wales, as well as the core spatial regression model specification and an overview of the comparables model.
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