You can get small business rate relief if:
You occupy one property only
The property has a rateable value below £15,000
You cannot claim for unoccupied properties, or for properties entitled to mandatory relief.
If you occupy more than one property, the properties cannot have a rateable value exceeding £2,899, and the rateable value of all the properties must be less than £19,999 outside London (or £27,999 in London).
If the total rateable value increases above these levels, relief will cease from the day of the increase.