Every property in the UK pays a local tax, be that Council Tax for Residential properties or Business Rates / Non Domestic Property Charge for Commercial Properties.
So, as an example, using the known registered address of the Conservative Political Party in the UK, of the Basement Floor, 4 Matthew Parker Street, Westminster, London, SW1H 2AH, you can search the Post Code on the website of the Valuation Office, who cover Business Properties in England & Wales. There are other sites for Business Properties, at counciltaxrates.info as well as sites for properties in Scotland and Northern Ireland, all of which supply similar information to that of the Valuation Office.
Then select the required property and view all the details, expanding the areas marked Valuation Details and How The Rateable Value Is Calculated.
You will now see how the property is classed by the business occupying it, in this case it is shown as Offices And Premises, and the size and use of any rooms within the property. In this case, there is a Lower Ground Floor Office, which is 427.73 square meters in size, and a Lower Ground Floor Internal Storage Area, 25.91 square meters in size. Sometimes you will see how floors a business operates on, how many offices are on a floor, if there is a kitchen area or toilet facilities for staff etc.
This information is all publicly available and is used here only as a training aide, to demonstrate the type of additional information which can be freely located about a property.