Draft prepared 9 Aug 2026. Needs: one real anonymised BOQ extract to annotate, a named author, and a downloadable template. Items in [square brackets] need your input.
A BOQ, or bill of quantities, is an itemised list of every material and item of work in a project, with the measured quantity, the unit of measurement, the rate per unit and the resulting amount for each line. In interior design it is the document that turns a design into a price. If your quotation is a single figure with a few headings under it, you have not been given a BOQ — you have been given a number.
Why the BOQ is the most important document you will be given
Everything that goes wrong commercially on an interior project can be traced back to an ambiguous BOQ. A lump sum of ₹18 lakh tells you nothing about whether the wardrobe carcass is BWP plywood or particle board, whether the false ceiling is gypsum or mineral fibre, or whether the electrical points include the wiring. When the material arrives and it is not what you assumed, there is no document to argue from.
A properly written BOQ does three jobs. It lets you compare two contractors on the same basis, because you can see line by line where the price difference actually is. It fixes the specification, so a change of material becomes a visible variation rather than a silent substitution. And it gives you a mechanism for measuring what has actually been completed when a payment falls due.
What every BOQ line must contain
| Element | What it means | What a weak BOQ does instead |
| Item description | What the work is, in enough detail to build from | “Wardrobe work” |
| Specification | Material, grade, thickness, finish, and where relevant the brand or an approved equivalent | Omits grade entirely — the single most common gap |
| Unit | Square feet, running feet, number, litres, kilograms, lump sum | Mixes units between comparable items so quotes cannot be compared |
| Quantity | The measured amount, derived from the drawings | Round numbers that suggest estimation rather than measurement |
| Rate | The price per unit | Only a total, so the rate cannot be checked |
| Amount | Quantity × rate | — |
| Notes and exclusions | What is specifically not included in the line | Silence, which is where disputes come from |
How an interior BOQ is normally structured
Most interior BOQs are organised by trade rather than by room, because that is how the work is procured and executed. A typical sequence runs: preliminaries and site establishment; demolition and dismantling; civil works including masonry, plaster and waterproofing; flooring; false ceiling; electrical, including points, wiring, distribution boards and light fittings; plumbing and sanitary; HVAC where in scope; carpentry and joinery, usually the largest single section in a residential project; glazing and partitions; metal and fabrication work; painting and wall finishes; hardware; loose furniture where included; and finally cleaning and handover.
Within carpentry, expect separate lines for the carcass and the shutter, because they are different materials at different rates. A BOQ that prices “wardrobe” as one square-foot rate is hiding the two decisions that actually determine the cost and the life of the unit.
Units: the part that causes the most confusion
Carpentry is usually measured in square feet of the visible elevation area, though some contractors measure the developed area including internal shelving, which produces a larger number at a lower rate for the same work. Modular kitchens are frequently quoted per running foot, which bundles the base unit, counter and wall unit into a single linear measure. False ceilings, flooring and painting are measured in square feet of the surface covered. Electrical is measured per point, and you must establish what a “point” includes — the wiring back to the board, the switch, the plate, the fitting, or only some of these.
Before comparing two quotations, confirm that both are using the same measurement convention. A 15% price difference frequently turns out to be a measurement difference.
Terms you will encounter
A provisional sum is a placeholder allowance for work that has not yet been designed or priced, such as an undecided stone or a light fitting selection still to be made. It will be adjusted up or down when the actual item is chosen. A BOQ carrying many large provisional sums is not really a fixed price. A prime cost rate is an allowance per unit for a supply item you will select later, typically used for tiles, stone, sanitaryware and light fittings — for example, a tile allowance of a stated rupee value per square foot, with any difference added or credited. A variation or change order is work added, removed or altered after the BOQ was agreed; the contract should state how variations are priced, ideally at the same rates as the original BOQ where the item exists in it. Wastage is the allowance for offcuts and breakage built into quantities. Retention is a percentage of each payment held back until the defects liability period ends.
How to read a BOQ critically: eleven checks
- Is every material graded? Plywood should say BWP or BWR and reference a standard; laminate should state thickness; glass should state toughened or laminated and thickness.
- Are quantities derived from drawings, or are they suspiciously round?
- Do the quantities reconcile with the floor plan? Total flooring area should approximate the carpet area.
- Is there an exclusions list? Its absence is a warning sign, not a convenience.
- How much of the total sits in provisional sums and prime cost allowances?
- Are civil and demolition works itemised, or bundled into an unexplained lump sum?
- Does the electrical section state what a point includes, and does the point count match the drawings?
- Is there a separate line for site preliminaries — supervision, scaffolding, protection, debris removal — or is it hidden inside rates?
- Are loose furniture, appliances, curtains, and statutory approvals in or out?
- Is there a stated contingency, and who controls it?
- Do the payment milestones tie to measurable BOQ sections rather than to calendar dates?
Common problems, and what they usually mean
| What you see | What it usually indicates |
| An unusually low overall figure with vague specifications | The specification will be decided later, and it will be decided downwards |
| Large provisional sums | The final price is not yet knowable; expect it to move upward |
| “As per site condition” against multiple items | Open-ended scope with no cost ceiling |
| No brand or approved-equivalent named for hardware | Hardware is where cheap work fails first, and where substitution is least visible |
| Quantities significantly above the measurable area | Either a different measurement convention or over-measurement |
| Rates identical across obviously different items | The BOQ was built from a template rather than from your drawings |
BOQ versus estimate versus quotation
An estimate is an indicative figure produced before the design is complete, usually from an area-based rate. A quotation is an offer to do defined work for a stated price. A BOQ is the itemised basis on which a serious quotation is built. You should expect an estimate early, a BOQ-backed quotation before you sign anything, and a re-measured final account at completion.
Frequently asked questions
What does BOQ stand for in interior design?
Bill of quantities. It is an itemised schedule of all materials and work in a project, with quantities, units, rates and amounts for each line.
Is a BOQ the same as a quotation?
No. A quotation is the price offer; the BOQ is the itemised breakdown that justifies it. A quotation without a BOQ cannot be checked or compared.
Should I be given a BOQ before signing?
Yes. Signing a contract on a lump sum without an itemised BOQ removes your only mechanism for controlling specification and variations.
Can a BOQ change during the project?
Yes, through variations, provisional sum adjustments and re-measurement. What should not change is the rate for an item already priced in the BOQ.
Who prepares the BOQ?
The contractor or design-and-build firm normally prepares it from their own drawings. On larger projects a quantity surveyor or project management consultant prepares an independent BOQ that contractors then price, which allows a genuinely like-for-like comparison.
What is the most common omission in an interior BOQ?
Material grade — particularly plywood grade and laminate thickness — followed by a clear statement of what is excluded.
Download
[NEEDS INPUT: attach the annotated sample BOQ (anonymised) and a blank template. This download is the primary link-earning asset on this page; without it the page is a guide, with it the page is a resource other sites will link to.]
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