Stamp duty may be calculated differently because the price of a new-build home normally includes VAT, while a second-hand residential property is generally sold without VAT. For a qualifying new build, stamp duty is usually based on the VAT-exclusive consideration, so the amount can be lower than if it were calculated on the full advertised price; a new build is not automatically exempt. The applicable rates and rules can change, so check the current guidance on revenue.ie or confirm the calculation with your solicitor before completing the purchase.