Construction adjudication UK: the complete 28-day process explained

Construction adjudication is a key mechanism in the UK for resolving disputes quickly within the construction and engineering sectors. Introduced by the Housing Grants, Construction and Regeneration Act 1996, this statutory procedure was designed to provide an effective solution when disputes arise, particularly concerning payments, delays, or contract variations. A solicitor specialising in alternative dispute resolution can advise you on your rights, review your contract, and represent your interests throughout the process.

Key takeaway: How does construction adjudication work in the UK?

Construction adjudication in the UK is a statutory dispute resolution procedure under the Construction Act that enables parties to obtain a rapid interim decision, normally within 28 days of the Referral Notice, while preserving the right to litigate or arbitrate later.

This guide explains the construction adjudication process UK-wide as it applies in 2026, including the “pay now, argue later” principle, the strict 28-day timetable, adjudicator appointments, costs, and enforcement in the Technology and Construction Court.

What is construction adjudication?

Construction adjudication is a statutory mechanism for resolving disputes quickly within the construction and engineering sectors. The adjudication meaning in construction centres on producing a temporarily binding decision, enforceable immediately, so that work and payment can continue while the underlying dispute may later be determined by arbitration or litigation.

When compared with arbitration or court proceedings, adjudication construction disputes stand out for speed, procedural flexibility, and their cash-flow-protective purpose, a distinction frequently captured in discussions of adjudication vs arbitration construction.

Legal Framework: The Housing Grants Act 1996

Construction adjudication in the United Kingdom is founded on a clear and mandatory statutory framework: the Housing Grants, Construction and Regeneration Act 1996 (HGCRA). This legislation was introduced to address long-standing issues within the construction industry, particularly payment delays and cash flow disputes, by providing a fast and effective dispute resolution mechanism.

The legal framework was significantly strengthened by the Local Democracy, Economic Development and Construction Act 2009, which expanded the scope of adjudication and remedied several limitations of the original Act.

As a result of these reforms, the statutory right to adjudication applies not only to written construction contracts but also to oral contracts, sub-contracts, and agreements relating to engineering works and associated construction services falling within the statutory definition of construction operations.

Note that: A key feature of the regime is that any party to a construction contract has a statutory right to refer a dispute to adjudication at any time, regardless of contractual restrictions, subject only to jurisdictional requirements and the crystallisation of a dispute.

Where a contract fails to include adjudication provisions that comply with the legislation, the Scheme for Construction Contracts applies automatically to ensure that the adjudication process remains available.

Construction adjudication is therefore a mandatory statutory mechanism, designed to preserve cash flow and maintain progress on construction projects.

The “Pay Now, Argue Later” mechanism

In practice, it requires the paying party to make the payment immediately, even if they dispute the amount or the quality of the work. The dispute does not disappear but is deferred to the adjudication process, where an independent adjudicator will review the evidence and issue a binding decision within a strict timeframe, usually 28 days.

This approach is particularly important for contractors and subcontractors, as it ensures that the cash flow essential to continuing work is not interrupted, preventing delays that could jeopardise project progress. Additionally, it helps maintain more stable contractual relationships, as disputes are addressed in a structured and timely manner rather than escalating into prolonged conflicts.

Specialist construction adjudication support is often sought to manage this mechanism effectively, particularly when preparing evidence, analysing contractual obligations, and presenting arguments clearly to the adjudicator.

The Complete 28-Day Adjudication process

Construction adjudication in the UK operates under a strict statutory timetable, with the adjudicator ordinarily required to reach a decision within 28 days of the Referral Notice unless the parties agree to an extension.

Notice of adjudication (Day 0)

The adjudication process begins with the Notice of adjudication, a formal document by which one party notifies the other of its intention to refer a dispute to adjudication. The notice must clearly identify the parties, the relevant construction contract, and the nature and scope of the dispute, such as payment issues, variations, delays, or alleged defects. A Notice of Adjudication may be issued at any time once a dispute has crystallised, and it marks the official start of the statutory timetable.

Appointment of the adjudicator (Days 1–5)

Following service of the Notice, an adjudicator must be appointed within a short statutory period. The parties may agree on an adjudicator directly or, failing agreement, request a nomination through an Adjudicator Nominating Body (ANB). The adjudicator must then formally accept the appointment, confirming their independence, jurisdiction, and ability to act within the compressed timeframe required by the adjudication process.

Referral notice (Day 7)

The Referral notice is the central submission in the adjudication and must be served within seven days of the Notice of Adjudication. It sets out the referring party’s full legal and factual case, including the relevant contractual provisions, a detailed chronology of events, and all supporting evidence. The quality and structure of the Referral are critically important, as it defines the scope of the adjudicator’s jurisdiction and frames the issues to be decided.

Adjudication procedure (Days 8–28)

During this phase, the adjudicator exercises wide procedural powers. These may include directing the exchange of written submissions, requesting further documents, convening meetings, conducting site inspections, or seeking expert assistance where necessary. While the principles of natural justice are maintained, the procedure is deliberately streamlined and fast-paced to meet the statutory deadline.

Adjudicator’s decision (Day 28)

At the conclusion of the process, the adjudicator delivers a reasoned written decision, typically within 28 days of the Referral Notice unless the parties agree to an extension. The decision takes immediate effect and is temporarily binding in accordance with the “pay now, argue later” principle, even if the dispute is later revisited through arbitration or court proceedings.

What is the role of Adjudicator Nominating Bodies (ANBs) in construction adjudication?

Adjudicator Nominating Bodies (ANBs) are independent organisations responsible for appointing an adjudicator where the parties to a construction dispute are unable to reach agreement on a nomination. Their role is essential in ensuring that the adjudication process can commence promptly and in compliance with the strict requirements of UK construction law.

ANBs are typically recognised professional institutions within the construction and legal sectors, maintaining panels of experienced construction adjudicators drawn from legal, engineering, and surveying backgrounds.

What are the costs of construction adjudication and how do they compare them to other dispute resolution methods?

In practice, reported industry experience suggests that parties often incur professional costs in the region of several thousand to tens of thousands of pounds, depending on the complexity of the dispute and the volume of evidence involved. Adjudicator fees frequently fall in the region of several thousand pounds to tens of thousands, depending on time spent and complexity, and are often shared between the parties unless otherwise directed.

The legislation generally prohibits automatic cost recovery clauses, in order to maintain the accessibility and efficiency of the process, although limited exceptions may apply if the parties agree on a different allocation of costs after the dispute arises. Compared to arbitration (often £100,000+) or High Court litigation (often £200,000+), construction adjudication remains significantly faster and more cost-effective, while still delivering a binding and immediately enforceable decision.

These comparisons explain why construction adjudication costs are widely regarded as proportionate when measured against arbitration or High Court litigation.

What are the costs of construction adjudication and how do they compare them to other dispute resolution methods?

In practice, reported industry experience suggests that parties often incur professional costs in the region of several thousand to tens of thousands of pounds, depending on the complexity of the dispute and the volume of evidence involved. Adjudicator fees frequently fall in the region of several thousand pounds to tens of thousands, depending on time spent and complexity, and are often shared between the parties unless otherwise directed.

The legislation generally prohibits automatic cost recovery clauses, in order to maintain the accessibility and efficiency of the process, although limited exceptions may apply if the parties agree on a different allocation of costs after the dispute arises. Compared to arbitration (often £100,000+) or High Court litigation (often £200,000+), construction adjudication remains significantly faster and more cost-effective, while still delivering a binding and immediately enforceable decision.

These comparisons explain why construction adjudication costs are widely regarded as proportionate when measured against arbitration or High Court litigation.

How are adjudication decisions enforced and legally protected in the UK?

Decisions issued under construction adjudication are immediately enforceable, in line with the “pay now, argue later” principle. This means that the party against whom the decision is made must comply without waiting for arbitration or court proceedings. Immediate enforceability is crucial for protecting cash flow and ensuring the continuity of construction projects.

If a decision is not complied with, it can be enforced through the Technology and Construction Court (TCC), the UK’s specialist court for construction disputes. The TCC provides a swift and efficient procedure to secure enforcement, helping to minimise project delays and financial disruption.

FAQs

What is adjudication in construction? Adjudication in construction is a UK statutory process allowing disputes under construction contracts to be referred to an independent adjudicator for a rapid, temporarily binding decision, usually within 28 days, to protect cash flow while preserving the right to litigate or arbitrate later.

How long does construction adjudication take? The construction adjudication process UK-wide is designed to conclude within 28 days of the Referral Notice, although the parties may agree to a short extension.

Can adjudication decisions be challenged? Adjudication decisions may only be challenged on narrow grounds, mainly lack of jurisdiction or a serious breach of natural justice; otherwise they must be complied with immediately and can be enforced through the Technology and Construction Court.

Construction adjudication is a fast and effective tool for resolving disputes while safeguarding project continuity and the cash flow of all parties. Engaging a specialist construction adjudication solicitor helps ensure the process is secure and that decisions are enforced quickly and reliably.

Need assistance with your adjudication?

Consult Qredible’s network to connect with a specialist alternative dispute resolution solicitor. They will provide strategic guidance, manage every stage of the process, and protect your financial and contractual interests.

KEY TAKEAWAYS:

• Construction adjudication provides a rapid and enforceable solution to disputes, keeping projects on track and protecting cash flow.
• The process follows a strict 28-day timetable, from Notice of Adjudication to the adjudicator’s decision.
• Adjudicator Nominating Bodies (ANBs) and specialist solicitors play a crucial role in ensuring impartiality, expertise, and procedural compliance.
• Decisions are temporarily binding and immediately enforceable through the Technology and Construction Court, with challenges only possible on very limited grounds.