A Bill of Quantities (BOQ) is the most important document in a construction project. It is a detailed, itemized list of all materials, quantities, specifications, and rates required to complete a construction project. Yet most homeowners sign BOQs without fully understanding what they contain — or what they are missing.
Why a BOQ Matters for Homeowners
Without a proper BOQ, your construction cost is a guess — not a commitment. A detailed BOQ locks your contractor to specific materials, grades, and quantities. Any deviation from the BOQ is a measurable, documentable change — not a subjective dispute.
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What a Good BOQ Must Include
- ▸Substructure: Excavation, PCC, foundations, anti-termite treatment
- ▸Superstructure: RCC columns, beams, slabs with specified concrete grades
- ▸Masonry: Block/brick type, mortar specification
- ▸Plastering: Internal and external plastering with thickness
- ▸Waterproofing: Terrace, bathrooms, sump specification
- ▸Flooring: Tile type, brand, size for each area
- ▸Doors & Windows: Material, size, hardware specification
- ▸Electrical: Wire grade, brand, switch brands, MCB ratings
- ▸Plumbing: Pipe material, brand, fixture specification
- ▸Painting: Brand, grade, number of coats
- ▸Miscellaneous: Sump, overhead tank, staircase, elevation features
Common BOQ Red Flags
Watch out for these warning signs in a contractor's BOQ:
- ▸Generic descriptions like "concrete work" without specifying grade (M20, M25)
- ▸No mention of steel grade (Fe500, Fe500D)
- ▸"Quality materials as per site" — meaning the contractor decides at their convenience
- ▸Missing items: often temporary works, excavation, plinth beam, or waterproofing
- ▸Lump sum amounts without item breakdown
- ▸Rates that seem unusually low (often because key items are missing)
The Buildogram Approach to BOQ
Buildogram creates itemized BOQs where every line item has a quantity, unit, specification, and rate. Your BOQ is generated from structural drawings, ensuring quantities match what is actually being built. The BOQ is part of your contract — it is not a quotation that changes during construction.
📋 Quick Checklist
FAQs
Is a BOQ the same as a contractor estimate?
No. A contractor estimate is often a rough guess or strategic low number to win the contract. A BOQ is a detailed, itemized document with quantities, specifications, and rates that becomes part of your contract.
Who prepares the BOQ?
The contractor or quantity surveyor prepares the BOQ. Buildogram prepares your BOQ from your architectural and structural drawings, ensuring quantities are calculated — not guessed.
What should I do if my contractor refuses to give a detailed BOQ?
A contractor who refuses to give an itemized BOQ is a risk. Walk away or insist in writing. Buildogram can review any BOQ you receive and identify gaps before you sign.
Can the BOQ change during construction?
BOQ changes should only happen through a signed Change Order document. Any cost increase must be documented, explained, and approved by you in writing before the contractor proceeds.
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