In the Dominican Republic, most real estate transactions carry legal fees of approximately 1% of the amount of the transaction.
Those fees cover the services provided by the legal office you’ve chosen, and they should include; due diligence, meetings, drafting of contracts, and signatures. Basically, all the steps to transfer the "Certificate of Ownership" in the name(s) of the new owner(s).
On top of that 1%, add 18% of vat-tax for obtention and legalization of the required documents during the transaction. Here is an example with a US$300,000 transaction:
1% = US$3,000 + 18% (US$540) => US$3,540.
The buyer usually carries the costs of the transfer tax and legal fees. All of the other fees such as the real estate commission are payable by the seller.
PS: Also see the Confotur Law article.