Can a UAE contractor recover payment for varied works without a signed variation order?

Short answer

• Yes, recovery is possible, but it is harder without the signed order. The contractor must prove the employer instructed or consented to the varied works, and prove their value.
• Under a lump sum contract, Article 887 of the UAE Civil Code blocks any price increase for executing the agreed design. A variation only earns extra payment if the employer consented to it.
• Consent does not have to be a signed variation order. Emails, meeting minutes, approved drawings, site instructions, and a consistent course of conduct can all establish it.
• Where the works are proven but no price was agreed, the contractor is entitled to fair remuneration plus the value of materials supplied, under Articles 888 and 887(2).
• FIDIC notice deadlines still apply. Missing the 28-day claim notice can bar the payment claim even where the variation itself is not in dispute.

The starting point: a lump sum contract locks the price

Most UAE construction contracts are lump sum contracts, and employers prefer them for a reason. Article 887(1) of the UAE Civil Code provides that where a muqawala contract is made on an agreed design for a lump sum, the contractor cannot demand any increase in that sum for executing the design. The contractor carries the cost risk of the agreed scope. If a task turns out more expensive than priced, that is the contractor's problem.

The exception sits in Article 887(2). Where a variation or addition is made to the design with the consent of the employer, the agreement with the contractor on that variation must be observed. The Dubai Court of Cassation has applied this split repeatedly. In Judgment 472 of 2021, the court confirmed that in a lump sum contract the contractor cannot claim a price increase unless there is a change in the design or a variation approved by the employer. The whole recovery question therefore turns on one word: consent.

Consent is not the same as a signed variation order

The contract may say variations are only valid when issued in writing on a particular form and signed by a named person. That clause matters, and an employer will lean on it. It is not, however, the end of the analysis. UAE courts look at whether the employer in substance instructed or consented to the varied works, not only at whether a particular piece of paper exists.

Consent can be shown through a range of evidence. An email from the engineer asking for the change. Minutes of a site meeting recording the instruction. Revised drawings or specifications issued and approved by the employer's side. Site instructions and the daywork sheets signed off by the resident engineer. Inspection and approval of the completed varied works without objection. A pattern across the project where earlier variations were instructed informally and then paid. Taken together, this kind of record can establish employer consent even where the formal variation order was never executed. The contractor's difficulty is evidential, not legal: the entitlement exists, but it has to be proved, and a contractor with a thin paper trail is in a weak position.

Constructive variations: when the employer changes the work without admitting it

Not every variation arrives as an instruction. A constructive variation happens when the employer's conduct, rather than an express order, forces the contractor into additional work. Contradictory specifications, late or revised drawings, denied site access, and instructions that materially change the original scope can all push the contractor beyond the contracted design without anyone ever calling it a variation.

These claims are real but they are the hardest to run. The contractor has to show that the work went beyond the agreed scope, that the employer's conduct caused it, and that the employer knew the work was being done. Contemporaneous records decide these claims. A contractor who flags the change in writing when it happens, identifies it as a variation, and states that additional cost and time will follow, builds a claim that survives. A contractor who stays silent to keep the relationship smooth and raises everything at the final account has usually lost the argument before it starts.

How the varied works are valued

Once consent is established, the question moves to price. Where the parties agreed a price or rate for the variation, that agreement governs. Where they did not, UAE law fills the gap. Article 888 of the Civil Code provides that if the consideration for the work was not fixed, the contractor is entitled to fair remuneration together with the value of the materials supplied. Courts and tribunals decide fair remuneration on expert evidence, weighing market rates, the scope of the work, and the costs the contractor actually incurred.

FIDIC contracts contain their own valuation order. The varied work is priced first on the bill of quantities rates where the work is similar, then on adjusted rates where it is not, then on a fair valuation. Under the FIDIC Red Book, where a variation changes the contract price by more than 15 per cent, the contractor is entitled to new rates that reflect overheads and profit rather than the original bill rates.

One route contractors should not rely on is unjust enrichment. UAE law does not allow an unjust enrichment claim to run alongside a contractual relationship. Where a contract governs the parties, the claim for varied works is a contractual claim for fair remuneration under the Civil Code, not a restitution claim, and pleading it the wrong way wastes time.

Subcontractors are in a different and sometimes better position

The lump sum restriction in Article 887 is built to protect the employer, who is treated as a non-technical party. UAE courts have held that the article does not govern the relationship between a main contractor and a subcontractor, because those two parties are equal in technical knowledge. Between them, the general rules apply, and a subcontractor can recover for a design change approved by the main contractor even where that approval was implicit and unwritten.

This cuts both ways. A subcontractor's variation claim against a main contractor is not bound by the strict lump sum logic, which can help. A subcontractor with no privity to the employer, though, generally cannot claim against the employer directly, unless the main contractor has assigned that right. A subcontractor chasing payment for varied works needs to be clear about which contract, and which counterparty, the claim runs against. The notice and documentation rules for upstream payment are covered further in our guide to recovering unpaid contractor invoices in the UAE.

What changes under the new Civil Code in June 2026

Federal Decree-Law No. 25 of 2025, the new Civil Transactions Law, comes into force on 1 June 2026 and renumbers the muqawala provisions. The lump sum rule in old Article 887 moves to Article 829. The substance largely carries over: under Article 829(2), a contractor is still only entitled to a price increase for a scope change by agreement of the parties.

The new code adds one feature that helps contractors. Article 829(2) introduces an entitlement to additional payment where the change is due to the fault of the employer, which gives a clearer statutory route for constructive variation claims caused by employer conduct. Article 829(3) also empowers the court to restore the balance between the parties where unforeseen exceptional circumstances undermine the basis of the contract. Contracts signed before 1 June 2026 remain governed by the old code and the case law built on Article 887, so a contractor's current claims are still argued under the old numbering.

How should contractors protect payment for varied works in the UAE?

Recovering payment for varied works without a signed variation order is possible under UAE law, but the contractor wins or loses on evidence of consent and evidence of value. Article 887 of the Civil Code, and Article 829 from June 2026, allow recovery only where the employer instructed or consented to the change, and the absence of a signed order shifts the whole burden onto the contractor's contemporaneous records.

The most important step is the one taken on site, not in the dispute. A contractor who treats every change as a formal event, confirms it in writing when it happens, identifies it as a variation, states that cost and time will follow, and keeps the daywork sheets, drawings, and approvals, holds a claim that survives. A contractor who carries on quietly to protect the relationship, and saves the argument for the final account, is the one who finds the variation entitlement has evaporated. Where a FIDIC contract applies, the 28-day notice is a condition precedent, and missing it can bar an otherwise good claim.

For contractors and subcontractors pursuing payment for instructed or constructive variations, or employers facing variation claims they consider overstated, our construction law team advises on entitlement, valuation, notice compliance, and the documentary record needed to prove a claim. Related reading: how FIDIC claims work in the UAE and unpaid interim payment certificates in UAE construction projects.

‍