Quantity Take-Off and BOQ: How to Prepare an Accurate Fit-Out Bill of Quantities

An accurate quantity take-off is the starting point for pricing and controlling a fit-out project. It is important, however, to distinguish the take-off process from the Bill of Quantities document. This guide explains the difference, the measurement workflow, a worked example, and the checks to complete before pricing.

Quick answer

A quantity take-off is the process of extracting work quantities from drawings, specifications, and site measurements. A Bill of Quantities (BOQ) is the structured document that lists the items, descriptions, units, and quantities. A BOQ may be unpriced or priced by adding unit rates and item totals.

Quantity take-off vs BOQ vs priced BOQ

• Quantity take-off: the measurement and calculation process.

• BOQ: the organized document containing item descriptions, units, and quantities; it may be unpriced or priced depending on its purpose and contract.

• Priced BOQ: the BOQ after unit rates and total values have been added.

The take-off is the process, the BOQ is the resulting document, and pricing is the next stage. Using these terms consistently avoids misunderstandings between the client, designer, and fit-out contractor.

Why quantity take-off matters in fit-out work

• It exposes missing scope before the quotation is issued.

• It supports item-based pricing instead of a rough square-meter rate.

• It helps plan material procurement and subcontract packages.

• It provides a baseline for planned versus actual progress and cost.

• It makes variation orders and progress claims easier to assess.

If quantities are inaccurate, fit-out project pricing and profitability will also be inaccurate, even when unit rates are correct.

Before starting the take-off

Collect the latest approved architectural, electrical, and mechanical drawings, finish schedules, technical specifications, scope of work, and site survey. Record each document's revision and date. Measuring from an obsolete drawing can make a mathematically correct BOQ unsuitable for construction.

How to prepare a fit-out quantity take-off step by step

1. Break the project into work sections

Organize demolition and masonry, plaster and paint, flooring, ceilings and gypsum, joinery, aluminum, electrical, plumbing, and HVAC. Then divide each section into measurable and priceable items.

2. Write an unambiguous item description

Do not write only “painting.” Identify the surface, paint system, number of coats, preparation, and whether supply and installation are included. A clear description prevents unlike quotations from appearing comparable.

3. Select the correct unit

Flooring and painting are commonly measured in square meters, skirting and channels in linear meters, doors and fixtures by number, and some systems by point, set, or lump sum according to the specification and contract.

4. Measure from drawings and record the source

Link each quantity to the drawing number, location, and calculation. Do not rely on visual estimates, and retain room-level details before consolidating totals.

5. Apply the agreed measurement rules

Do not automatically deduct every opening. Door and window deductions, returns and reveals, and the minimum opening size to deduct depend on the specification, measurement rules, and contract. Record the rule so another reviewer can reproduce the result.

6. Separate work quantity from purchase quantity

The BOQ quantity represents measured work under the contract rules. Purchase quantity may include cutting, breakage, pack sizes, and other waste. Waste is not a universal percentage; it depends on material, size, laying pattern, room geometry, and supplier guidance.

7. Review clashes and revisions

Compare drawings, specifications, finish schedules, and the site survey. Raise discrepancies before pricing. Update the revision number after every approved change and retain a clear revision history.

Worked example: measuring one room

Assume a room is 5 × 4 meters, 3 meters high, with a 1 × 2.1 meter door and a 1.5 × 1.2 meter window:

• Floor area: 5 × 4 = 20 m².

• Perimeter: (5 + 4) × 2 = 18 m.

• Gross wall area: 18 × 3 = 54 m².

• Openings: (1 × 2.1) + (1.5 × 1.2) = 3.9 m².

• Net wall area before returns and contract deduction rules: 54 − 3.9 = 50.1 m².

• Preliminary skirting length: 18 − 1-meter door width = 17 linear meters.

If floor-tile purchasing needs an illustrative 5% allowance, purchase quantity becomes 20 × 1.05 = 21 m². This percentage is only an example, and purchase quantity should not replace the measured work quantity in the BOQ.

Essential BOQ fields

• Item code and work section.

• Item description, specification, and supply/installation boundaries.

• Location and drawing reference.

• Unit, quantity, and calculation basis.

• Drawing revision and review date.

• Unit rate and total when the BOQ is priced.

• Notes, assumptions, and exclusions.

Common take-off mistakes

• Measuring from an obsolete drawing revision.

• Missing preparation, accessories, testing, protection, and cleaning.

• Combining different work into one description that is hard to price or track.

• Deducting every opening or applying one waste percentage without checking the rules and material.

• Failing to document calculations and quantity sources.

• Executing a change without a measured, priced, and approved variation order.

• Overwriting one file without revision history.

BOQ review checklist

• Are scope and exclusions clear?

• Were the latest approved drawings used?

• Does every item have a description, unit, quantity, and reference?

• Were openings, returns, and waste checked using suitable rules?

• Were architectural, electrical, and mechanical clashes reviewed?

• Can another reviewer reproduce the calculation?

From take-off to pricing and profitability tracking

After approving quantities, add unit rates and then track actual expenses, claims, and collections against each item. Bonyan ERP BOQ and work-item management connects those quantities with project cost and profitability, avoiding disconnected files that are difficult to update and audit.

Conclusion

A reliable take-off is more than multiplying length by width. It starts with approved scope and drawings, applies clear measurement rules, and documents every quantity and assumption. The resulting BOQ becomes a dependable basis for pricing, procurement, construction, and profit protection.

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