written abbreviation for subject to contract: used especially in connection with the sale of property to show that an agreement has been reached but no formal contract (= legal document) has been signed

If the offer is accepted, then the property is Sold Subject to Contract (Sold STC). At this stage, the paperwork is not yet complete. 如果出价被接受，那么该房产就被视为 "依照合同出售"。在这个阶段，文书工作还没有完成。