You might be able to get business growth accelerator relief if:
Your premises is a new build property
You have to expand or make improvements to your property
Valid for new builds entered onto valuation roll from 1/4/18 onwards or expansion/improvements resulted in a Rateable Value increase from 1/4/18 onwards
New build premises
If your premises are new builds you won't have to pay business rates until 12 months after the building was completed.
Business rates also don't have to be paid on new builds until they're occupied. New tenants will then qualify for business growth accelerator relief for 12 months.
Expanding or making improvements to your premises
If you have expanded or made improvements to your property the business rates you're charged won't change for 12 months.
They will continue to be based on your old rateable value for this period of time.