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BOQ stands for Bill of Quantities. It's a document that sets out what a construction job involves, the quantity of each item and its unit price. Homeowners and contractors use the same document to discuss the work, so there are far fewer arguments.
First, to compare several contractors' prices on the same basis, because they all price the same list of items. Second, as an annex to the contract to prevent arguments about which work is included or not. Third, to control the budget during construction — how much of each category has been spent. Fourth, to split payment milestones so they match the real value of the work.
Item no. · description · quantity · unit · material unit price · material total · labour unit price · labour total · grand total. Common units are sq m for floors and walls, cu m for concrete and earthwork, kg or tonnes for steel, metres for pipes and linear work, and sets or points for building systems.
Start with the easiest work to measure — work measured by area: floors, walls, ceilings, roof. Then move on to volume work — concrete and earthwork. After that comes steel, which has to be taken off from the detail drawings, and finally electrical and plumbing systems, counted by points. Working in this order gives you a picture of the budget fastest, because the first three categories usually take more than half of the whole project's budget.
1 square metre of clay-brick wall uses about 130-140 bricks · about 8-12 AAC blocks · 1 gallon (3.785 litres) of paint covers about 30-40 square metres per coat · a standard bag of cement weighs 50 kilograms · standard rebar is 10 metres per bar · standard PVC pipe is 4 metres per length · 1 cubic metre of sand weighs about 1,400-1,600 kilograms. These figures don't replace a real takeoff, but they let you catch yourself if your takeoff is out by a factor of ten.
Forgetting the waste allowance — tiling and painting should allow around 5-10% depending on how complex the area is · taking off materials but not labour, which makes the budget nearly half of what it really is in some categories · leaving out invisible work such as site preparation, scaffolding, carrying materials up floors, site water and electricity, and handover cleaning, which together are not a small number
A BOQ is a list of work quantities detailed down to the unit, while a quotation is a sales document summarised from the BOQ. In practice, contractors usually prepare the BOQ first to work out their costs, then summarise it into a quotation for the customer. For high-value jobs, customers often ask to see the BOQ as well.
Enter the work items and match prices — the system pulls real material prices from stores on the marketplace for comparison, so you can estimate costs more accurately without opening a computer
It stands for Bill of Quantities — a schedule of work quantities and materials.
No. It's usually prepared by the designer or contractor, but homeowners should read and understand it, because it's the document used to compare prices and control the budget throughout the project.
Yes, and the contract should state that the annexes form part of it, to prevent disputes about scope — which items are or aren't included in the price.
About 130-140 clay bricks per square metre, or about 8-12 AAC blocks per square metre, depending on the block size and wall thickness.
This page is general information for basic understanding, not legal or tax advice. The figures, rates and conditions mentioned are those commonly used in the market and may differ from your case; check with a professional or the relevant authority before using them for real work