A building/construction contract is a legal agreement between a building owner and contractor that sets forth the terms for carrying out construction work, including payment terms, schedule, and penalties for non-compliance. Common contract documents that form the basis of the agreement include the contract or agreement itself, conditions of the contract defining legal obligations of parties, drawings, specifications describing project and material requirements, and other necessary documents like pricing schedules. The acceptance of the contractor's tender or proposal by the owner through signing or commencing work results in a valid construction contract.