A Bill of Quantities (BOQ) is an itemised list of every piece of work in a building project, each with a description, a unit of measurement and a quantity. Contractors price the same list, which makes their quotations directly comparable.
What a BOQ contains
| Column | Example |
|---|---|
| Item no. | 4.02 |
| Description | Providing and laying M20 RCC in slabs, excluding reinforcement and shuttering |
| Unit | m³ |
| Quantity | 38.6 |
| Rate / Amount | Filled by contractor (or by estimator for a cost plan) |
Items are grouped by trade: earthwork, PCC, RCC, reinforcement, masonry, plaster, flooring, doors and windows, waterproofing, painting, plumbing, sanitary, electrical and external works.
How quantities are measured
In India, measurement usually follows IS 1200 (Method of Measurement of Building and Civil Engineering Works). It sets rules such as which openings are deducted from plaster and masonry, and how concrete is measured around junctions. Consistent rules prevent the same wall being counted differently by two contractors.
Why homeowners benefit
- Apples-to-apples quotes: without a BOQ, one contractor may quote ₹1,800/sq ft and another ₹2,100/sq ft for different specifications.
- Material purchase: if you buy materials yourself, cement, steel and tiles can be ordered by stage.
- Payment control: running bills are measured against BOQ items, not guesses.
- Variation tracking: changes become priced additions instead of disputes.
BOQ vs estimate vs BOM
An estimate is a cost figure (often a per-sq-ft thumb rule). A BOQ lists the measured work items. A BOM (bill of materials) converts those items into materials to buy — bags of cement, tonnes of steel, number of bricks.
What you need to get a BOQ
Architectural plans, sections and elevations; structural drawings (or at least the column layout); and your specification choices. If you only have a plan, an estimator can still produce a preliminary BOQ with stated assumptions.