Warranty
The term 'warranty' can have a number of meanings, but in general, it refers to a legally binding assurance or promise.
Warranties may be used to provide assurance from one party to another that goods and/or services will meet certain expectations, e.g. fit for purpose, being free from defects, complying with statutory and other regulations and specifications.
A warranty can be either express (i.e. written) or implied.
A common form of warranty, and one that is paid for, is that which runs with a product, meaning that the customer of a product is given an assurance by the manufacturer that any defects or losses will be repaired or compensated during a given period. The warranty can also detail both parties’ rights and obligations in the event of a dispute.
Defects in buildings are not recoverable in tort (only as a contractual claim), as they are economic loss which are only recoverable through a contractual relationship. As a result, collateral warranties have been developed. These provide for a duty of care to be extended by one of the contracting parties to a third party who is not party to the original contract.
A typical example is an architect of a new development agreeing to a duty of care to the occupant. Privity of contract rules would prevent any liability arising between the architect and occupier without the existence of a collateral warranty.
For more information see: Collateral warranties.
Bonds and guarantees are forms of security that accompany contractual obligations and are based on either primary or secondary obligations.
For more information, see Guarantees.
Other forms of assurance that might be referred to on construction projects include:
- Fitness for purpose.
- Reasonable skill and care.
- Workmanlike manner.
- Good faith.
- Reasonable endeavours.
- Best endeavours.
- Retention.
- Duty of care.
[edit] Related articles on Designing Buildings
- Agency.
- Bonds.
- Bonds v guarantees.
- Breach of contract.
- Collateral warranties.
- Defects.
- Definition of collateral warranty.
- Difference between collateral warranties and third party rights.
- Duty.
- Fit for purpose.
- Guarantees.
- Insurance.
- Miller Act.
- Performance bond.
- Practical considerations of collateral warranties.
- Professional consultant's certificate.
- Reasonable skill and care.
Featured articles and news
First aid in the modern workplace with St John Ambulance.
Ireland's National Residential Retrofit Plan
Staged initiatives introduced step by step.
Solar panels, pitched roofs and risk of fire spread
60% increase in solar panel fires prompts tests and installation warnings.
Modernising heat networks with Heat interface unit
Why HIUs hold the key to efficiency upgrades.
Reflecting on the work of the CIOB Academy
Looking back on 2025 and where it's going next.
Procurement in construction: Knowledge hub
Brief, overview, key articles and over 1000 more covering procurement.
Sir John Betjeman’s love of Victorian church architecture.
Exchange for Change for UK deposit return scheme
The UK Deposit Management Organisation established to deliver Deposit Return Scheme unveils trading name.
A guide to integrating heat pumps
As the Future Homes Standard approaches Future Homes Hub publishes hints and tips for Architects and Architectural Technologists.
BSR as a standalone body; statements, key roles, context
Statements from key figures in key and changing roles.
ECA launches Welsh Election Manifesto
ECA calls on political parties at 100 day milestone to the Senedd elections.
Resident engagement as the key to successful retrofits
Retrofit is about people, not just buildings, from early starts to beyond handover.
Plastic, recycling and its symbol
Student competition winning, M.C.Esher inspired Möbius strip design symbolising continuity within a finite entity.
Do you take the lead in a circular construction economy?
Help us develop and expand this wiki as a resource for academia and industry alike.
Warm Homes Plan Workforce Taskforce
Risks of undermining UK’s energy transition due to lack of electrotechnical industry representation, says ECA.
Cost Optimal Domestic Electrification CODE
Modelling retrofits only on costs that directly impact the consumer: upfront cost of equipment, energy costs and maintenance costs.
The Warm Homes Plan details released
What's new and what is not, with industry reactions.






















