Besides the costs for mortgage advice and mediation there are a few extra cost factors to think about. The height of the costs partially depends on the purchase price. On average there will be 5% of the purchase price for extra costs like transfer tax, notary fee and Appraisal costs. These extra costs together with the fee for mortgage advice and mediation you need to pay with your own money. If you buy a new build property the purchasing costs will be payed by the vendor.