Most of the time, Transfer Duty is the tax paid on immovable property. You do not pay both VAT and Transfer Duty – these taxes are paid to the government.
To work out whether VAT or transfer duty is payable, check the seller’s status: if the seller is registered for VAT, then VAT is payable on the transaction and no transfer duty is payable by the buyer. If the seller is not registered for VAT purposes, then transfer duty is payable on the transaction by the purchaser.