A JCT contract is a standard form of construction contract used on building projects in the UK.
You may already have one in front of you because payment has stopped, work has changed or the project has gone wrong.
“The contract is not clear.”
That is often the real problem.
You may know there is a disagreement. You may not know what the contract says about payment, variations, delays, defects or what you can do next.
Before taking action, you need to understand which JCT contract you have and what its terms mean for your dispute.
What does JCT mean?
JCT stands for the Joint Contracts Tribunal.
It produces families of standard construction contracts and related documents for different projects and procurement methods.
There is not one single JCT contract.
Different forms may suit different types of projects and relationships. The contract used can affect how responsibilities, payment and risk are dealt with.
JCT 2024 is the current edition of the JCT suite.
However, older editions remain relevant to projects and disputes where those contracts were used.
What does a JCT contract do?
A JCT contract sets out the agreement between parties involved in a construction project.
Depending on the contract, it may deal with:
- The work to be carried out
- Who is responsible for design
- The contract price
- The payment process
- Variations and changes
- Extensions of time
- Delays
- Loss and expense
- Defects
- Insurance
- Suspension
- Termination
- Dispute procedures
The exact terms depend on the form used and any changes made to it.
This matters when a dispute starts.
A payment problem may also involve notices or alleged defects. A delay claim may depend on events, records and the contract procedure.
The answer may not sit in one clause.
What are the main types of JCT contract?
The JCT suite contains different contract families.
The right form depends on factors such as the size of the project, who controls the design and how the work is procured.
JCT Standard Building Contract
The Standard Building Contract is generally used for larger or more complex projects where detailed provisions are needed.
It is commonly associated with traditional procurement.
The employer usually arranges the design. The contractor carries out the construction work under the agreed terms.
JCT Design and Build Contract
Under a Design and Build Contract, the contractor carries out the works and takes responsibility for completing the design.
This can become important when a dispute concerns design responsibility or construction work.
The contract also deals with matters including payment and project administration.
JCT Intermediate Building Contract
The Intermediate Building Contract may be used where a project needs more detailed terms than a minor works contract.
Different versions are available depending on whether the contractor has design responsibility.
JCT Minor Works Building Contract
The Minor Works Building Contract is intended for smaller and less complex projects.
A smaller project can still lead to a serious dispute.
Payment, changes to the work, delays and defects can still become contested.
JCT subcontracts
JCT also produces subcontract forms.
These may govern the relationship between a main contractor and subcontractor.
The terms can become important when parties disagree over payment, variations, delay or termination.
Why does the exact JCT contract matter?
You should not assume that every JCT contract says the same thing.
Your position may depend on:
- The contract family
- The contract edition
- The completed contract details
- Any schedules or supporting documents
- Amendments to the standard wording
- Notices sent during the project
- What happened in practice
Two projects can use the same type of JCT contract but have different terms.
The contract may have been amended before it was signed.
Those amendments can change the standard position and affect how risk is shared between the parties.
Before relying on a general guide, check your actual signed contract.
What happens when a JCT contract has been amended?
JCT contracts are often changed.
The parties may agree amendments that alter particular clauses or add new obligations.
Changes may affect:
- Payment
- Design responsibility
- Variations
- Delay
- Extensions of time
- Liability
- Insurance
- Suspension
- Termination
- Dispute procedures
The wording of an amendment may become central to a dispute.
You need the full contract, including amendments and schedules, before you can properly assess where you stand.
What causes JCT contract disputes?
A JCT contract dispute can start in several ways.
You may be saying:
“We’ve done the work, but we haven’t been paid.”
The other side may then say the work was delayed, defective or outside the agreed scope.
Common disputes may involve:
Payment
The parties may disagree about what is due, when payment should be made or whether money can be withheld.
The dispute may involve payment applications, valuations or notices.
Variations
The scope of the project may change.
The parties may disagree about whether a change was instructed, who authorised it or how much it is worth.
Delays
The project may finish late.
The dispute may concern responsibility for the delay, extensions of time or the financial consequences.
Defects
One party may allege that the work does not meet the contract requirements.
The other may dispute responsibility or the extent of the alleged problem.
Termination
One party may want to end the contract.
Termination can have serious consequences, so the contract and required process need careful review before action is taken.
What should you check when a JCT dispute starts?
Do not begin with the loudest email in the dispute.
Start with the documents.
1. Find the complete contract
Identify the exact JCT form and edition.
Check for amendments, schedules and other documents that form part of the agreement.
2. Define the actual dispute
Be specific about what the parties disagree about.
Is the problem payment, a variation, delay, defects or termination?
Several issues may be connected.
3. Check the contract procedure
Look at what the contract says about the issue.
You may also need to check whether notices were required and what was sent.
4. Gather the evidence
Relevant documents may include:
- The signed contract
- Amendments
- Payment applications
- Invoices
- Notices
- Emails
- Site records
- Programmes
- Variation instructions
- Photographs
- Meeting records
Your position depends on the facts, contract and evidence.
5. Decide what you need to achieve
You may want payment.
You may need to defend a claim, keep the project moving or respond to a formal notice.
Your commercial objective matters when deciding what to do next.
Can a JCT contract dispute go to adjudication?
Potentially.
Parties to qualifying construction contracts have a statutory right to refer disputes to adjudication.
However, adjudication is not automatically the right route for every JCT dispute.
Before deciding, consider:
- What the dispute involves
- What the contract says
- What evidence is available
- The value of the matter
- The commercial reason to proceed
- What you want to achieve
The question is not only, “Can we adjudicate?”
You also need to ask whether adjudication is the right next step for your position.
Should you send a formal letter yourself?
You can write to the other side yourself.
The risk comes from acting before you understand the contract position.
A letter may make legal arguments, set deadlines or threaten action.
Before sending it, consider whether the wording matches the contract and the route you may need later.
You do not want to take a step that makes the dispute harder to manage.
When should you get advice about a JCT contract?
You may need advice when:
- The contract is not clear
- Payment remains overdue
- The other side disputes what is owed
- Delay allegations have started
- Defects are being raised
- A formal notice has arrived
- Termination is being discussed
- Adjudication is being considered
Early advice can help you understand your position before the issue becomes harder to manage.
The aim is to know what the contract means, what the evidence shows and what your options are.
What experience does My Commercial Lawyers have with JCT contracts?
My Commercial Lawyers’ main focus is construction disputes.
Relevant experience includes JCT and FIDIC-aligned construction contracts and employer and subcontractor contract disputes.
The firm has also terminated JCT contracts for non-payment and enforced remedies under insolvency law.
This does not mean every JCT dispute needs the same action.
The right next step depends on your contract, facts, evidence and commercial position.
Dealing with a JCT contract dispute in London?
Understanding what a JCT contract is may help you identify the issue.
A live dispute needs a closer review.
You may be dealing with unpaid work, a disputed variation, delay allegations, defects or termination.
Before choosing adjudication, litigation or another route, understand where you stand.
Read more about working with a JCT contract dispute solicitor in London if the contract has already become a dispute.
Know where you stand before taking the next step
A JCT contract can affect payment, project responsibilities and what happens when the parties disagree.
Start with the facts, contract and evidence.
My Commercial Lawyers provides barrister-led construction dispute support, with litigation conduct where suitable.
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Share the issue, contract and key facts so the team can review whether this is something they can help with.