The Valuation Office has published the ‘Rating Cost Guide 2026’. This is used for valuations prepared on the contractor’s basis. All costs within the guide are indexed to the Antecedent Valuation Date of 1st April 2024. This is the 9th Edition of the Guide.
A copy of the guide can be found here: https://www.gov.uk/government/publications/rating-cost-guide-2026