Contract execution
Contract execution is the process of signing an agreed contract, after which its terms become binding on the parties to the contract.
Contract engrossment is the process of preparing the final agreed form of contract and its schedules and appendices so that it can be executed. Engrossed contracts are then either executed under seal (signed by the parties, witnessed and most importantly made clear that they are executed as a deed) or under hand (a 'simple contract' that is just signed by the parties).
Simple contracts and contracts under seal have different limitation periods. An action founded on simple contract cannot be brought after six years from the date on which the cause of the action accrued. The limitation period for a contract under seal is 12 years. See Contracts under seal v under hand for more information.
Generally, two engrossed contracts will be prepared for execution, one for the client and one for the supplier. Alternatively, one party might retain the executed contract, with certified copies being issued to the other party, this can avoid potential errors in preparing two contracts for execution.
It is very important to ensure all details entered into the contract are correct before signing. It is surprisingly common for example for the wrong company to be named in the contract, and whilst the courts may see this as a clerical error that should be corrected, this should not be relied upon, particularly in the case of insolvency, and court proceedings in themselves are likely to be costly and time consuming.
See:
- Derek Hodd Limited v Climate Change Capital Limited.
- Genesis Housing Association Limited v Liberty Syndicate Management Limited.
- Westshield Civil Engineering Ltd and Westshield Ltd v Buckingham Group Contracting Ltd.
It is also relatively common for contract execution to be delayed until well after the actual works described in the contract have been started. Clearly this is not advisable.
Letters of intent are sometimes used as interim arrangements to mobilise a supplier prior to a formal contract being executed, but they should never be seen as an alternative to a full contract and should place a limit on expenditure and liability prior to the contract being put in place. See letter of intent for more information.
[edit] Related articles on Designing Buildings
- Articles of agreement.
- Conformed contract.
- Construction contract.
- Construing a contract.
- Contract award.
- Contract conditions.
- Contract documents.
- Contract engrossment
- Contracts under seal v under hand.
- Derek Hodd Limited v Climate Change Capital Limited.
- ESignatures.
- Essentials of a contract.
- Form of tender.
- Genesis Housing Association Limited v Liberty Syndicate Management Limited.
- Glossary of property law terms.
- Letter of intent.
- Privity of contract.
- Westshield Civil Engineering Ltd and Westshield Ltd v Buckingham Group Contracting Ltd.
Featured articles and news
Plumbing and heating for sustainability in new properties
Technical Engineer runs through changes in regulations, innovations in materials, and product systems.
Awareness of the Carbon Border Adjustment Mechanism
What CBAM is and what to do about it.
The new towns and strategic environmental assessments
12 locations of the New Towns Taskforce reduced to 7 within the new towns draft programme and open consultation.
Buildings that changed the future of architecture. Book review.
The Sustainability Pathfinder© Handbook
Built environment agency launches free Pathfinder© tool to help businesses progress sustainability strategies.
Government outcome to the late payment consultation, ECA reacts.
IHBC 2025 Gus Astley Student Award winners
Work on the role of hewing in UK historic conservation a win for Jack Parker of Oxford Brookes University.
Future Homes Building Standards and plug-in solar
Parts F and L amendments, the availability of solar panels and industry responses.
How later living housing can help solve the housing crisis
Unlocking homes, unlocking lives.
Preparing safety case reports for HRBs under the BSA
A new practical guide to preparing structural inputs for safety cases and safety case reports published by IStructE.
Male construction workers and prostate cancer
CIOB and Prostate Cancer UK encourage awareness of prostate cancer risks, and what to do about it.
The changed R&D tax landscape for Architects
Specialist gives a recap on tax changes for Research and Development, via the ACA newsletter.
Structured product data as a competitive advantage
NBS explain why accessible product data that works across digital systems is key.
Welsh retrofit workforce assessment
Welsh Government report confirms Wales faces major electrical skills shortage, warns ECA.
A now architectural practice looks back at its concept project for a sustainable oceanic settlement 25 years on.
Copyright and Artificial Intelligence
Government report and back track on copyright opt out for AI training but no clear preferred alternative as yet.
Embedding AI tools into architectural education
Beyond the render: LMU share how student led research is shaping the future of visualisation workflows.
Why document control still fails UK construction projects
A Chartered Quantity Surveyor explains what needs to change and how.
Inspiration for a new 2026 wave of Irish construction professionals.
New planning reforms and Warm Homes Bill
Take centre stage at UK Construction Week London.

























