Contractor Unilaterally Increased Fixed Price; Client Termination Upheld

A contractor, after agreeing to complete construction work for a fixed price, unilaterally raised the price, claiming unforeseen difficulties, which led the client to terminate the contract and hire a replacement. The lower court ruled that the contractor's unilateral price increase, without prior agreement or explicit contractual provision allowing such modification based on unforeseen circumstances, constituted a breach justifying termination by the client, and the Court of Cassation upheld this finding, affirming that a fixed-price contract binds the contractor to the agreed terms despite difficulties, unless the contract itself provided for price revision under specific conditions not met in this instance.