A bill of quantities is a measured schedule of every item of work in a project, with a quantity and a rate against each line — square metres of tiling by type and location, linear metres of skirting, number of sockets, number of doors. It is standard on commercial projects and almost unheard of on Dubai residential renovations. It matters because it makes the price legible, comparable, and impossible to argue about later.
What you normally get instead
A one or two-page quotation. Room-by-room headings, a short description against each, and a total at the bottom. Sometimes a provisional sum for the things nobody wanted to price properly.
It looks reasonable, it is quick to produce, and it is almost impossible to interrogate. You cannot tell what the kitchen actually costs, what the tiling actually costs, or whether the electrical work has been priced at all.
What a bill of quantities changes
Three things follow from having every item measured.
You can see where the money goes. If the joinery line looks high, you can question it. If the MEP line is missing, you can spot it immediately — which is the single most valuable thing a homeowner can do before signing.
You can compare like for like. Two lump sums tell you nothing, because you have no idea whether they cover the same scope. Two bills of quantities can be compared line by line.
Variations are calculated, not negotiated. When you change a stone or a wall turns out to be load-bearing, the revised figure comes from rates you already agreed. There is no argument about what it should cost, because it was priced before anyone had a reason to be difficult.
Why so few contractors produce one
Two reasons. It takes considerably longer to produce — days rather than hours. And it exposes the margin, because a measured bill shows a client precisely what each element costs.
A lump sum does neither. That is the entire argument for it, from the contractor's side.
We take the opposite view. Transparency is the point, and it is the reason our variations rarely become disputes.
What to ask for
If you are getting quotations, ask each contractor for their price broken down by element, with quantities. You do not need a formal bill of quantities from everyone — but you do need enough detail to see what has been included.
A contractor who will not break down their price is telling you something. Believe them.
What it actually is
A bill of quantities is a document that lists every element of the work, quantified and rated. Not ‘bathroom — AED 60,000’, but the tiling by the square metre, the sanitaryware by the item, the waterproofing by the area, the drainage alterations by the run, each with a rate against it.
The bill of quantities is the central document of UK construction practice applied here, and it is what every other protection depends on. It comes from quantity surveying, which is a profession rather than a software package. The measurement follows standard conventions so that two people measuring the same drawing arrive at the same quantities.
What it does for you
Three things. It makes two quotations comparable, because you can set them side by side line by line instead of guessing why one number is bigger. It makes the price auditable, because you can see what each part costs. And it gives an agreed rate for change before anyone needs one.
That third point is the one owners underestimate. On a renovation something always changes. With a bill of quantities there is already a rate for additional tiling or an extra socket. Without one, every change is a negotiation conducted while your house is in pieces.
How to read one
Each item has a description, a unit, a quantity and a rate, giving an amount. Units are conventional: m² for areas, m for linear items, nr for countable items, and ‘sum’ or ‘item’ for things priced as a whole.
Watch for two things. Provisional sums are allowances for work not yet designed — they will change, and the bill should say so. Prime cost sums are allowances for items you have not yet selected, typically finishes. Both are honest devices; a bill with too many of either is a bill that was produced too early.
What it is not
It is not a guarantee that nothing will change. It is a measured basis against which change is priced. Nor is it the same as a quotation with a few lines in it — a breakdown into six sections is a summary, not a bill of quantities.
And it does not replace contingency. Hold five to ten per cent separately for what is found behind walls, because measurement describes what can be seen.
Related Questions
Does a bill of quantities cost extra?
Not with us. It is simply how we price, so it forms part of producing the quotation rather than being an extra.
Some contractors do charge for detailed pre-construction work. If so, that should be stated clearly at the outset rather than appearing later as a line you did not expect.
Can I use a bill of quantities to get other quotes?
Yes, and it is a perfectly legitimate use. A measured schedule lets other contractors price exactly the same scope, which is the only way to compare fairly.
It also reveals quite quickly which contractors are comfortable being measured against a defined scope and which would rather quote a round number.
What is a bill of quantities?
A document listing every element of the work, quantified and rated, prepared by measuring the drawings and the property. It turns a lump sum into something auditable — you can see what each part costs, compare it against another contractor's line by line, and price any change against an agreed rate.
Why does it matter on a renovation?
Because renovations change. With a measured bill there is already a rate for additional work before you need one. Without it, every variation is negotiated mid-project when you have least leverage, which is how a job quoted at one figure finishes at another.
What is a provisional sum?
An allowance for work that cannot yet be measured because it has not been designed — areas behind a wall that has not been opened, for instance. It is an honest device, and the bill should state clearly that it will be adjusted once the work is defined. A bill with many provisional sums was produced too early.
What is a prime cost sum?
An allowance for an item you have not yet selected, typically a finish — tiles, sanitaryware, ironmongery. It holds a budget for the item while leaving the choice open, and it is adjusted up or down when you select. Useful, provided the allowance is realistic rather than optimistically low.
Does a bill of quantities mean the price cannot change?
No. It means change is priced against agreed rates rather than negotiated. The price changes if the scope changes or if something is found that could not be seen — which is what contingency is for, held separately at five to ten per cent.
Do all contractors produce one?
Most do not, because it takes time and skill and the market mostly buys on headline price. That is the reason we do — it is the document that makes our price comparable and auditable, and it is the main practical difference between a quantity surveyor pricing a job and a builder estimating one.
Who prepares a bill of quantities?
A quantity surveyor, by measuring the drawings and the property against standard conventions. That standardisation is the point — two people measuring the same drawing should arrive at the same quantities, which is what makes the document a neutral basis rather than one party's opinion.
Can I use it to get other quotes?
Yes, and it is one of the more useful things you can do with it. Issuing the same measured bill to several contractors means every price is for identical work, which turns comparison into arithmetic. It is how commercial projects are tendered and there is no reason a villa cannot be.