Hello, I am Keith, one of the experts on Just Answer, and pleased to be able to help you with your question.
The purpose of the Stamp Duty Land Tax (SDLT) surcharge was to deter individuals form buying more than one home. It is set at #%.
It only applies to a second property. If the buy to let property you are contemplating is your only property then the surcharge does not apply. CCH Daily has the following pithy summary [note the word additional]:
'Higher rates of SDLT will be charged on purchases of additional residential properties, such as buy to let properties and second homes, with effect from 1 April 2016. this will apply to additional property purchases valued at over £40,000.
The higher rates will be 3% above the current SDLT rates. At the same time changes to capital gains tax payment dates will be reduced to 30 days after completion rather than the current 10 to 22 month payment window.'
Of course the surcharge will catch nearly all buy to let acquisitions.
A Buy to Let is defined in Wikipedia as:
'a phrase referring to the purchase of a property specifically to let out, that is to rent it out'
I do hope that I have been able to shed some light on your question.