Construction Variation Orders in UAE: Claims and Procedures
Entitlement for varied work in the UAE turns less on the merits of the change than on whether it was captured in writing and notified inside the contract’s time limits, since a procedural lapse can defeat an otherwise sound claim.
Not every change to the works arrives as a written instruction. This separates instructed variations from constructive ones — where employer conduct or site conditions alter the scope with no formal order — and works through how each is valued, what the contractor must notify and by when, and how prolongation and inefficiency costs are evidenced.
Reviewed by Mohamed Noureldin, Founder, Managing Partner & Senior Legal Consultant
Work done at the employer's request gets paid for. The instinct arrives with contractors from wherever they last built, bringing a companion assumption: that an instruction given across a site table, or a notice sent a fortnight late, is untidiness rather than a threat to entitlement. On a UAE project that is the wrong way round. Where the contract makes a written instruction the gateway to a variation and fixes a period within which the contractor must notify the consequences, failure to follow the procedure can defeat the claim on its own. The merits of the change are reached second, if they are reached at all.
The starting point sits in the Civil Code, Federal Law No. 5 of 1985, under which a change to agreed obligations requires the agreement of both parties unless the contract provides otherwise. Construction contracts provide otherwise, and that is the purpose of a variation clause. The employer, usually acting through the engineer, is given power to order a change that binds the contractor to build it. What the contractor receives in exchange is machinery — a method of valuing the change, a route to more time where the change causes delay, and procedural conditions attached to both.
The power and the machinery are one bargain, which is why the conditions bite. A contractor who accepts the instruction and builds the change has performed its half; skip the notice, or fail to produce the records the contract asks for, and the performance may end up without the payment mechanism that was meant to accompany it. UAE courts and tribunals read the contract terms alongside civil law principles, looking for two things in particular: clear contractual authority for the change, and notification given in time. Most variation disputes turn on those questions rather than on whether the extra work was reasonable.
Related Services: For practical support on the drafting and administration side, see our construction contracts practice in Dubai and our wider UAE construction contract services.
Who has authority to change the scope
Under the FIDIC conditions used on many UAE projects, the engineer occupies two roles at once: the person who may instruct a variation, and the person who values it in the first instance. The engineer's determination is not the last word — it can be challenged through the dispute resolution route the contract sets out — but the combination shapes how a claim is best presented. The first audience is the engineer, three weeks after the event, not a tribunal three years later.
Authority is narrower than the traffic on site suggests. A resident engineer, a clerk of works, the project manager and the employer's own operations staff all give directions, and not all of them hold the power the contract confers. A marked-up drawing from someone without that power is not an instruction. It may still matter as evidence in a constructive variation argument, but it is not a shortcut around one. Where the contract provides a route for confirming an oral instruction in writing, use it, and use it that week rather than at month end.
Instructed and constructive variations
An instructed variation is the straightforward case: a change explicitly ordered by the employer or the engineer under the authority the contract grants, recorded in writing and often followed by a request for the contractor's price and time effect before work proceeds. Everything downstream is easier because the fact of the change is not in issue. What remains is valuation.
A constructive variation is a change that has happened without anyone ordering it. Site conditions differ from what the documents described; a design revision alters what has to be built without being labelled a variation; the employer's conduct — restricting access, resequencing other trades, insisting on a standard of finish the specification does not require — leaves the contractor building something other than what it priced. UAE courts have recognised claims of this kind where a contractor executed work beyond the original scope because the employer required it, or because circumstances effectively altered the contract.
The difference in difficulty is evidential. On an instructed variation the instruction proves itself. On a constructive one the contractor has to establish three things: that the work went beyond the original scope, that the employer's requirement or the changed circumstances caused it, and that no express provision of the contract had already placed that risk on the contractor. The third is where these claims most often fail. A clause allocating site conditions, or coordination with other trades, or design development to the contractor answers the claim before the merits are opened.
All three depend on a settled account of the original scope: a contractor that cannot say precisely what it priced cannot show that it has exceeded it. That account is built at tender stage, in the marked drawings and the qualifications recorded against the bill.
Valuing the varied work
Most contracts set out an order of preference, and the valuation argument is usually an argument about which rung applies. Where the varied work is of the same character and executed under similar conditions to work already priced, the contract rate applies. Where it is comparable but not identical, the priced rate becomes the base and is adjusted for the difference. Where nothing in the bill is comparable, the work is valued fairly, which in practice means built up from cost: materials, labour, plant, overheads and profit, with the effect on the programme handled separately.
An example makes the mechanics visible. Suppose the bill prices blockwork at AED 95 per square metre over 2,000 square metres and the employer instructs a heavier block with a different bedding detail. The figures below are invented purely to show the shape of the calculation.
| Component of the new rate | AED per square metre |
|---|---|
| Materials | 62.00 |
| Labour | 24.00 |
| Plant | 6.00 |
| Subtotal | 92.00 |
| Overheads and profit at 15% | 13.80 |
| Rate for the varied work | 105.80 |
| Original bill rate | 95.00 |
| Difference | 10.80 |
At AED 10.80 per square metre over 2,000 square metres, the measured work comes to AED 21,600 — the easy part of the claim, and modest beside what the same change can cost in time.
A valuation has to be transparent and supported by detailed records, because a rate asserted without a build-up invites the employer to substitute one of its own. Checking claimed hours against labour allocation sheets is the standard first challenge to any build-up.
Notice: what, and by when
The period is whatever the contract says it is, and the clause deserves to be read for three things: what starts the clock, what has to be delivered before it expires, and what the contract says happens if it is not. Contracts frequently separate a short first notice from the detailed particulars that follow, and the two carry different deadlines. Confusing them is expensive, because assembling cost records is slow and writing a notice is not. A contractor with, say, twenty-eight days from the event that spends the first twenty-one gathering invoices has used three quarters of its period on the part that could have followed afterwards.
Time claims run on the same discipline. Where a variation affects the critical path it can push out the completion date, and the contractor's protection against liquidated damages is an extension of time claimed in the manner and within the period the contract requires. Late submissions may simply be rejected. The notice is not the claim; it is what keeps the claim alive while the claim is built.
Prolongation and inefficiency
These are the two heads of cost that most often survive on principle and fail on evidence.
Prolongation is the cost of being on site longer: the time-related overhead of supervision, accommodation, site facilities and standing plant across the extended period. Proving it takes two things, usually assembled separately. One is a delay analysis showing that the variation, rather than something else, moved the completion date, run against a programme updated as the job progressed instead of reconstructed after the argument started. The other is a costed record of what a day on site actually cost. If a variation extends completion by 20 days and the time-related site overhead runs at AED 18,000 a day, prolongation comes to AED 360,000 — arithmetic that is trivial once both inputs exist and impossible to defend when either is missing.
Inefficiency is harder, because nothing invoices it. The cost shows up as the same crew producing less than it should, and the comparison that persuades is between its output on unaffected work and its output while the disruption ran. If a gang averaged 40 square metres a day before it was broken into short bursts around other trades and 28 a day afterwards, the loss is 12 square metres a day — thirty per cent of the original output — and the money follows from the gang's daily cost. What defeats these claims is concurrency: where other causes of disruption were running at the same time, the contractor has to isolate the part attributable to the variation, and a claim that quietly sweeps in the effect of its own late deliveries will be taken apart line by line.
The records that decide it
Almost everything above rests on documents created while the work was happening. The list is short and dull, and either kept or not:
- A variation register kept from the first day of the job, giving a serial number and a date to every potential variation, instructed or not.
- Daily labour, plant and material allocation records coded to the variation number rather than to the project as a whole.
- The instruction itself or, where there was none, the correspondence recording what was asked for and by whom, and any request for an instruction that went unanswered.
- Programme updates issued at the contractual intervals, so the critical path can be shown before and after the change.
- Minutes of site meetings, often the only contemporaneous record that the employer's team knew what was being built.
Site staff should be trained to recognise a change when it arrives, because the first person to see a constructive variation is a foreman, not a commercial manager. Employers need the mirror image: approval workflows that match the contract, so people without authority are not creating exposure it never intended.
When agreement fails
Variation disputes escalate along a predictable path: the engineer's valuation, then whatever tiered mechanism the contract sets out, then arbitration or the courts. The earlier stages deserve better than treatment as a formality on the way to a hearing: a variation account is one of the few disputes that can genuinely be settled by the people who were there. Joint measurement on site, an agreed set of allocation records, or an expert's determination on a single valuation question can dispose of a claim that would otherwise take years and cost a multiple of its value.
Where a claim does reach a hearing, it is made from the file that existed before the dispute began. Nothing produced afterwards carries the same weight.
Conclusion
Variation claims in the UAE are won and lost on discipline more often than on argument. Establish who may change the scope, capture the change in the form the contract requires, notify within the period it sets, and keep records that let each head of cost be traced to the change that caused it. A contractor who does those four things argues about valuation from a position of strength. One who does not may never reach the valuation argument.
Disclaimer
This article is for informational purposes only and does not constitute legal advice.
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