Not every BOQ needs the same level of breakdown. A detailed BOQ goes item-by-item with full specifications, sub-quantities, and precise units — as opposed to a summary or abstract BOQ, which rolls work up into broad cost heads.
Detailed BOQ vs. Abstract BOQ
| Aspect | Detailed BOQ | Abstract BOQ |
|---|---|---|
| Item breakdown | Individual items, each with spec | Grouped into broad sections |
| Use case | Tendering, billing, execution | Quick budgeting, client summary |
| Typical length | 50-300+ line items | 10-20 section totals |
What Goes Into a Detailed BOQ
- Full item description — material, grade, dimensions, and method (e.g., “RCC M20, 1:1.5:3, including formwork”).
- Precise unit — cum, sqm, rm, or number, matched exactly to how the item is measured.
- Quantity from measurement — taken off from drawings, not rounded estimates.
- Rate and amount per item — not just a section total.
- Sub-items where relevant — e.g., excavation split by soil type or depth range.
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Full item breakdown, formula-linked from quantity to abstract
Frequently Asked Questions
What makes a BOQ “detailed” rather than a summary?
Item-level breakdown with full specifications, precise units, and individual rates — rather than broad section totals.
When do I need a detailed BOQ instead of an abstract?
For tendering, billing, and execution tracking, a detailed BOQ is essential; an abstract is fine for quick budgeting or client-facing summaries.
How many line items does a typical detailed BOQ have?
It varies by project size, but 50-300+ line items is common for a full residential or small commercial building.
Related: BOQ of Civil Work: Full Sample · BOQ Summary Sheet · BOQ Construction Project Example