No, never!

Only one of the two taxes will be payable in a transaction. VAT takes preference over transfer duty.

The VAT payable is taken from the seller’s perspective. If the seller is registered for VAT and the property forms part of that seller’s (vendor’s) taxable supply, then VAT is payable and not transfer duty. However, if the seller is not registered for VAT or the property does not form part of that seller’s (vendor’s) taxable supply, then transfer duty will be payable.