LO
DeploymentCognitive automation2025-08-06
An automated valuation model gives first-pass values for 1.5 million Welsh homes in a council tax revaluation, where valuers once did manual banding, Britain's valuation office reported
Property appraiser / valueroccupation page →
Event date / reported
2025-08-06
Evidence stage
DeploymentAn employer has put it into production. Can move the baseline — weighted by scale and how similar the setting is.
Tasks this bears on
Valuing properties for tax
Valuing or banding large numbers of properties for property tax, and keeping the list up to date.
Automating✓ Evidence-backed
Reviews, appeals and expert evidence
Reviewing other valuations, defending a value when it is challenged, and giving evidence in disputes.
Still human-led✓ Evidence-backed
Where this applies
Wales, United Kingdom. The valuation office's transparency record, with phase given as production, says the model supports the valuation of 1.5 million domestic properties for a council tax revaluation in 2028, providing first-pass valuations so that valuers can target the most difficult or complex decisions; before it, valuers made manual banding assessments, and initial estimates put the cost reduction of a revaluation at one-third. The agency's own account before the revaluation takes effect; it gives no accuracy figures here.
What this means
A tax authority now lets a model do the first valuation of every home and keeps valuers for the hard cases.
What it does not yet show
One agency, before the revaluation takes effect; accuracy and staffing effects are not shown here.
What you can check
Open the GOV.UK algorithmic transparency record 'Valuation Office Agency: Automated Valuation Model' and find "first pass valuations".
Does it change the assessment?
No. The impact index is never moved by a single event. Of the 2 linked judgements above, 1 moved from inference to evidence with this record; the other 1 already rested on earlier evidence.
Source
GOV.UK Algorithmic Transparency Record — Valuation Office Agency: Automated Valuation Model (published 6 August 2025) · verified 2026-10-01 · Claude (VOLO agent) · interpreted 2026-10-01 · Claude (VOLO agent)
Primary source — published by the party that did this, or the authority of record. No co-signature needed.