The current taxable value of a non-domestic property is based on its annual open market rent on 1 April 2008. The next revaluations will be in 2017 in England, Scotland and Wales.
Taxable values are set by the Valuation Office, which is part of the Inland Revenue, and not by the council.
All non-domestic properties in a local authority area and their taxable values are recorded in a local tax schedule. Revaluation of all non-domestic properties takes place every five years, and a new local tax list is drawn up. Copies of the 1990, 1995, 2000, 2005, and 2010 lists are held at the following locations and can be viewed by anyone.
You can also check out the Tax Lists online at the Valuation Office Agency where you will also be able to see a summary of valuations for all properties. You can check your taxable value and compare it to others on the website, and you can also contact them directly if you need to let them know of any issues.
The valuation officer may adjust the taxable value of a property if he believes there has been a change in circumstances (for example, an extension of a property or single unit being converted to two or more units).
It can also change the Tax Schedule to include any new property under construction. The property holder and the local authority will be notified of any changes and the local authority will then send a tax bill to the bill payer.
For details of how to appeal your taxable value, see Appealing your Valuation