If the Seller of a property is registered for VAT, it is important to find out:
It is strongly recommended that the Seller get written advice from their accountant or auditor at the time of signing the mandate (before marketing the property).
If VAT is payable, the Purchaser does not pay transfer duty.
Both VAT and transfer duty are taxes, but in a property transaction, only one of these is charged, it will never be both.
If the Purchaser is also registered for VAT, they may be able to claim back the VAT paid on the transaction from SARS.
The Seller, as the VAT vendor, is usually the one responsible for paying VAT, unless the contract clearly states that the Purchaser must pay it.