Warranty

A warranty is a promise that specified work, materials, or performance will meet stated conditions.

Definition

A warranty sets a commitment about something described in a contract, such as materials, a deliverable, or a defined level of performance. Its subject, duration, remedy, and exceptions depend on the wording and applicable law. In engineering services agreements, owners distinguish a commitment to provide specified deliverables from language that could be read as guaranteeing a project outcome, construction result, or error-free design. A warranty is not the same as the professional standard of care, although both may appear in a contract. It is also not insurance, and coverage for warranty obligations depends on policy terms. Firms review warranty language alongside scope, acceptance criteria, correction obligations, and professional liability provisions. The word alone does not establish what the firm has promised; the full agreement and project context matter. The ACEC provides business resources for engineering firms, while interpretation of a specific warranty requires attention to its contract language and applicable law.

How owners use it

• Owners identify exactly what is warranted, for how long, and what remedy or correction process the agreement specifies.
• A firm compares a promise to submit a named deliverable with a promise that the completed project will perform without defects.
• Contract review reads warranties alongside scope, acceptance criteria, standard-of-care language, and insurance terms.
• Project teams track requested corrections to determine whether they concern an agreed deliverable or a proposed expansion of services.

Related terms

• Standard of CareThe level of professional skill and care expected under the circumstances from a similarly situated professional performing comparable services.
• Professional Services AgreementA contract between a client and a professional firm covering services such as engineering, surveying, or design.
• Scope of ServicesThe written description of work a firm agrees to perform, including tasks, deliverables, assumptions, exclusions, and sometimes interfaces with other
• Contract Risk ReviewA structured review of proposed contract terms to identify obligations that may affect scope, schedule, payment, liability, insurance, or dispute

Related guides and articles

• What contract terms should a civil engineering firm review for risk?Read the full agreement before signing, including the scope, exhibits, schedules, general conditions, incorporated standards, and the firm’s proposal.
• How do professional standards of care affect engineering risk?The standard of care is a legal and professional concept used to assess whether engineering services met the level expected under the relevant circumstances.
• How should a firm price additional services and scope changes?Set up a process to identify, document, price, and authorize changed work before the team starts it, when the contract permits that process.