• Contractor liability insurance is a specialty coverage developed in the 1990s to protect contractors’ liability for design errors or omissions. Prior to the introduction of these policies, several markets that offered this coverage did so by endorsing a professional liability policy for designers, and coverage was generally limited to the contractor’s vicarious liability for design errors and omissions (i.e., liability held by the contractor for the errors or omissions of the other party , such as an engineer hired by a contractor to provide design advice). As more contractors began to perform design and construction work, which dramatically increased their professional responsibility, a contractor professional liability policy was developed to meet the needs of contractors for unique design and coating responsibility, including direct design responsibility. Insurance coverage may be drawn up on an annual basis to cover all of the contractor’s operations, or on a project-by-project basis to cover the contractor’s project-specific obligations.