根据相关规定，购房首付款是购房者在购房时支付的一部分款项，通常是房屋总价值的一定比例，而非固定金额。如果购房者因家人反对购房而决定退款，是否能成功退款需根据具体情况而定。一般情况下，购房首付款是作为购房者支付的定金，如果购房合同中没有相关约定，一旦购房者 unilaterally decide to withdraw from the purchase, the seller may have the right to retain the earnest money as compensation for the breach of contract. It is recommended to carefully review the terms of the purchase contract and consult with the seller or real estate agency to negotiate the possibility of refunding the earnest money.- AI整理生成 -