Apart from properties that are exempt from business rates, each non-domestic property has a rateable value. This is set by the Valuation Office Agency (VOA), an agency of Her Majesty's Revenue and Customs.
The rateable value of your property broadly represents the yearly rent the property could have been let for on the open market on a particular date. For the revaluation that came into effect on 1 April 2010, this date was set as 1 April 2008.
Your rateable value can be obtained from the Valuation Office Agency website.
The valuation officer may alter the value if circumstances change. The ratepayer (and certain others who have an interest in the property) can appeal against the value shown in the list if they believe it is wrong.
Further information about the grounds on which appeals may be made and the process for doing so can be found on the VOA website.