"Sold STC" stands for "Sold Subject To Contract." It means the seller has accepted an offer from a buyer, but the sale is not yet legally binding because the necessary legal paperwork and conveyancing process have not been completed. During this phase, the property is usually taken off the market, but the sale could still fall through if issues arise, such as mortgage problems or legal complications. Neither party is legally committed to the deal until contracts are exchanged and signed.

This stage comes after the "Under Offer" stage, where an offer is made but not yet accepted. "Sold STC" indicates a more advanced stage where the agreement is in progress but not final.