Sounds like you need a Realtor to help you, I presume you are buying at a new development by this question. It is common for the buyer to pay transfer tax on this type of property, but everything is negotiable.
Remember this, new developers will pay your agent fees for you and no extra amount in the price of the property, they just like to represent both sides and save some $$$
Mike and Stella
Broker Associate, Paragon Real Estate Group CA DRE 01844627
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