Construction Dispute Resolution: Options for QSs and CMs

A payment gets withheld, a variation is disputed, a completion date slips - and suddenly a project that was running smoothly is heading for a fight. Construction dispute resolution is one of the most consequential skills a quantity surveyor or commercial manager can master, because how a disagreement is handled in the first 48 hours often decides whether it costs a few emails or six figures in fees.

This guide breaks down the five main routes for resolving disputes on UK construction projects - negotiation, mediation, adjudication, arbitration and litigation - and explains when each one applies, what it typically costs, how long it takes, and how NEC4, JCT and FIDIC contracts steer parties toward them.

Whether you are drafting a Notice of Adjudication for the first time, advising a client on whether to mediate a final account dispute, or simply trying to understand your rights under the Housing Grants, Construction and Regeneration Act 1996, you will find a practical, UK-focused breakdown here.

By the end, you will know exactly which dispute resolution route fits your situation - and how to keep the project moving while you get there.

What Counts as a Construction Dispute

A construction dispute arises whenever the parties to a building contract cannot agree on their rights or obligations - and on a live project, that can happen weekly. Not every disagreement needs a formal process; most are resolved through a phone call or a revised valuation. A dispute in the legal sense only crystallises once one party has made a clear claim or assertion and the other has rejected it, gone quiet, or offered something materially different.

• Payment and valuation disagreements - the single biggest driver of adjudication referrals in the UK
• Extension of time and loss and expense claims following delay or disruption
• Variations and instructed change that has not been priced or agreed
• Defects, workmanship and non-conformance with the specification
• Final account disputes at project close-out
• Termination and repudiation disputes

Why Early Resolution Matters

Every week a dispute sits unresolved, it tends to get more expensive and more entrenched. Cashflow gets disrupted for the party owed money, relationships between site teams and head office cool, and evidence - site diaries, photographs, verbal instructions - becomes harder to reconstruct accurately. Surveyors who flag a potential dispute early, document it contemporaneously, and select the right resolution route from the outset consistently achieve better outcomes than those who let a disagreement drift until it forces a formal claim.

Negotiation and Mediation: The First Line of Defence

Direct Negotiation

Most disputes on UK construction projects never reach a formal process at all - they are resolved through direct negotiation between the QS, the commercial manager and their opposite number. This is the cheapest and fastest route by a wide margin, and it preserves the working relationship needed to get through the rest of the project. Good negotiation depends on having a well-evidenced position: a clear valuation, a properly particularised delay narrative, and a realistic sense of what a tribunal would actually award if the matter escalated.

Mediation

If direct negotiation stalls, mediation brings in a neutral third party - typically a construction-experienced mediator - to facilitate, rather than decide, a settlement. It is private, confidential, and conducted on a without-prejudice basis, meaning nothing said in the room can be used later in arbitration or court. Many JCT and NEC4 contracts explicitly require parties to at least consider mediation before escalating further, and courts increasingly expect it to have been attempted before litigation proceeds. Mediation is particularly effective for valuation disputes, workmanship disagreements and any situation where the parties need to keep working together.

• Typically resolved within four to six weeks of appointment
• Costs shared between the parties, usually a fraction of arbitration or litigation fees
• Non-binding until a settlement agreement is signed - either party can walk away
• Allows creative outcomes courts cannot order, such as phased payments or extended relationships

Adjudication: The UK's Statutory Fast-Track Route

How Adjudication Works

Adjudication is the route most UK QSs and commercial managers will use at some point in their career. Under the Housing Grants, Construction and Regeneration Act 1996 (the Construction Act), any party to a construction contract has a statutory right to refer a dispute to adjudication at any time, regardless of what the contract says. The process starts with a Notice of Adjudication, followed by the appointment of an adjudicator - often through a nominating body such as RICS - who then has 28 days to reach a decision, extendable to 42 days by the referring party or longer by agreement. The adjudicator's decision is binding immediately and must be complied with, even if either party intends to challenge it later in arbitration or litigation.

Strengths and Limitations of Adjudication

Adjudication's biggest advantage is speed: a decision in 28 days keeps cash moving and stops disputes from paralysing a live project. It is also relatively cheap, since the adjudicator's fees are the main cost and each party typically bears its own legal costs. The trade-off is that adjudication decisions are only binding in the interim - either party can still refer the same dispute to arbitration or litigation for a final, permanent determination, though in practice most adjudication decisions are accepted and never revisited. Adjudicators also cannot award costs beyond their own fees, and the compressed timetable rewards parties who already have their evidence in order.

Arbitration: A Private, Binding Alternative

Arbitration involves a neutral arbitrator, or panel of arbitrators, appointed under the Arbitration Act 1996 to make a final and binding decision after hearing evidence and argument from both sides. It sits between adjudication and litigation on the formality scale: more structured and more expensive than adjudication, but private, confidential and often faster than the courts. Arbitration is common on major infrastructure and international projects, particularly where FIDIC contracts are used, because the award is enforceable across borders under the New York Convention in a way a domestic court judgment is not. Unlike adjudication, an arbitrator can award costs to the winning party, which raises the stakes considerably for whoever loses.

Litigation: The Last Resort

Litigation means taking the dispute to court - in England and Wales, specialist construction and engineering disputes are usually heard in the Technology and Construction Court (TCC), part of the Business and Property Courts. A judge hears the evidence and makes a binding decision, subject to a right of appeal. Litigation is generally the slowest and most expensive route: cases can run twelve to twenty-four months or longer once you account for pleadings, disclosure, witness statements, expert evidence and trial, and legal costs on both sides can dwarf the value of smaller claims. It is also public - judgments are published and can affect a firm's reputation.

Litigation still has a role. It is the only route that can consolidate multiple related disputes into one set of proceedings, compel disclosure of documents a reluctant party would rather not produce, and deal properly with issues like fraud, insolvency or genuinely novel points of construction law that a tribunal of arbitrators or an adjudicator working to a 28-day clock is poorly placed to resolve. Most experienced QSs and commercial managers treat litigation as the fallback once negotiation, mediation and adjudication have been exhausted or are clearly unsuitable.

Choosing the Right Route Under NEC4, JCT and FIDIC

NEC4

NEC4 builds dispute resolution into Options W1, W2 and W3, one of which the parties select at contract formation. Option W2 applies to UK projects and preserves the statutory right to adjudication at any time; Option W1 is used mainly on international projects and adds a step where senior representatives from each party try to resolve the dispute before adjudication; Option W3, new in NEC4, introduces a standing Dispute Avoidance Board for projects outside the UK where statutory adjudication does not apply. Across all three, adjudication is a mandatory precondition to arbitration or litigation.

JCT

JCT 2016 contracts take a lighter touch. Section 9 requires the parties to give serious consideration to mediation if direct negotiation fails, but this is not an enforceable precondition and neither mediation nor adjudication has to happen before the parties can proceed to their chosen final route - typically litigation, unless an arbitration clause has been specifically selected in the contract particulars. This flexibility suits JCT's traditional use on commercial fit-out and building projects where disputes are often smaller and simpler than on major infrastructure work.

FIDIC

FIDIC's 2017 suite, common on international and engineering projects, channels disputes through a standing Dispute Avoidance/Adjudication Board (DAAB) appointed at the start of the project specifically to help avoid disputes before they crystallise, and to adjudicate them contractually if they do. A DAAB decision that is not challenged in time becomes final and binding; if challenged, the dispute proceeds to international arbitration, typically under ICC rules, which gives the award cross-border enforceability that a domestic court judgment lacks.

Practical Tips for QSs and CMs Managing Disputes

Whichever route a dispute ends up taking, the groundwork happens long before any notice is served. These habits consistently separate QSs and commercial managers who resolve disputes quickly from those who get dragged through protracted, expensive processes.

• Keep contemporaneous records - site diaries, photographs, instructions and correspondence are the evidence that wins or loses an adjudication
• Know your contract's dispute clause before you need it - check whether adjudication is a precondition and which nominating body applies
• Value and notify promptly - late notices under NEC4 or JCT can bar an otherwise valid claim regardless of merit
• Escalate deliberately - a quick negotiation attempt costs nothing, so try it before committing to a formal process
• Get early legal or RICS-accredited advice on high-value claims - the cost of an hour's advice is trivial next to a lost adjudication
• Do not ignore a Notice of Adjudication - responding within the compressed timetable is essential, even if you intend to contest jurisdiction
• Consider the relationship, not just the claim - on a project with months left to run, preserving working relationships has real commercial value

Frequently Asked Questions

What is the difference between adjudication and arbitration in construction?

Adjudication is a fast, statutory process under the Construction Act 1996 that gives a binding-in-the-interim decision within 28 days. Arbitration is a more formal, private process under the Arbitration Act 1996 that produces a final, binding award, but typically takes six to eighteen months and costs considerably more.

How long does construction adjudication take in the UK?

An adjudicator must reach a decision within 28 days of the dispute being referred, extendable to 42 days by the referring party alone, or longer if both parties agree. In practice, most adjudications run close to the full 28-day timetable.

Is an adjudicator's decision legally binding?

Yes, but only in the interim. The decision must be complied with immediately and can be enforced through the courts if a party refuses to pay, but either party can still refer the same dispute to arbitration or litigation for a final determination.

Can you refuse adjudication in a construction contract?

No. Under the Housing Grants, Construction and Regeneration Act 1996, any party to a UK construction contract has a statutory right to refer a dispute to adjudication at any time, and this right cannot be excluded by the contract.

What is the Housing Grants, Construction and Regeneration Act 1996?

Often called the Construction Act, it is the UK legislation that gives parties to construction contracts a statutory right to adjudication and to suspend work for non-payment, and sets minimum payment notice and withholding requirements that most standard-form contracts, including NEC4 and JCT, are built around.

When should you use mediation instead of adjudication?

Mediation suits disputes where preserving the relationship matters, where a creative or flexible settlement is more valuable than a binary decision, or where the issues are more about valuation judgement than a clear-cut contractual entitlement. It is voluntary and non-binding until a settlement is signed.

How much does construction arbitration cost compared to litigation?

Arbitration is generally cheaper than litigation because it avoids court fees and can be run on a tighter timetable, but tribunal and venue fees still apply and the parties usually pay the arbitrator directly. Litigation costs tend to be higher overall due to longer timescales, formal disclosure obligations and court fees, though costs vary widely by case complexity.

Final Thoughts

Construction dispute resolution is not a single process but a ladder - negotiation and mediation at the bottom, litigation at the top, with adjudication doing most of the heavy lifting in between. The QSs and commercial managers who handle disputes best are not necessarily the ones who avoid them entirely, since on a live project that is rarely possible, but the ones who recognise a dispute early, document their position properly, and pick the route that matches the size and nature of the disagreement.

Understanding your contract's dispute resolution clause before a disagreement happens - not after - is the single most useful thing you can do to protect your position, your cashflow and your project's timeline.

Want the full picture? Want to strengthen your contract knowledge?

Read our companion guides on NEC4 vs JCT: Which Contract Suits Your Project? and How to Write a Notice of Adjudication That Holds Up for a deeper, practical look at putting these routes into action.