The notary in Spain is a public official who will be required to witness the deed of sale.
Notary fees should amount to no more than €902

The property registry inscription fees run at 65% of the notary fees.

PLUSVALIA (Capital Gains Tax)
An "added value" tax based upon the increase of the Town Hall Index value of the price per square metre OF THE LAND from the prior (vendor's) purchase to the present sale.
This tax corresponds in principle to the seller. As there are several variable factors used in calculating this tax (location, area of land, building volume permitted, period of ownership of the vendor), the amount payable can vary substantially and should be verified before proceeding with the purchase. The basis of the calculation remains the same whether or not the land is built upon.

IN SUMMARY, it is a fair estimate to expect a total of 10% expenses when buying real estate in Spain.