The Valuation Office Agency (VOA) values all business properties for business rates. The valuation is based on information the VOA holds about your property. You can view and update this information at gov.uk/voa/valuation (yn agor mewn tab newydd).
You can contact the VOA at gov.uk/contact-voa (yn agor mewn tab newydd). If you are unable to use the online service you can also contact the VOA on 03000 505 505 or in writing to Valuation Office Agency, Durham Customer Service Centre, Wycliffe House, Green Lane, Durham, DH1 3UW