Bill of Quantities Format: Typical Structure & Columns

Common columns

Most BOQs include item number, description, unit (m, m², m³, nr, t, etc.), quantity, then rate and amount added at tender stage. Sections break work into trade or work-package blocks.

Preambles or method statements may sit in separate volumes but descriptions should reference them where pricing depends on quality or methodology.

Some bills add columns for “provisional,” “PC,” or “prime cost” markers, or split supply vs install—match the column set to your contract form so nothing is priced in the wrong place.

Numbering and references

Stable item numbering helps variations reference exact lines. When items split or merge, cross-reference old numbers in addenda to avoid double-counting.

Drawing and spec references inside descriptions reduce ambiguity for bidders.

For multi-volume tenders, repeat section headers and page ranges in the register so reviewers can navigate PDFs quickly.

What makes a BOQ “good”

Strong BOQs use consistent terminology, avoid duplicate items that differ only by wording, and tie each line to measurable scope.

Weak BOQs mix units, bury exclusions in narrative, or leave interfaces (e.g. builder’s work for MEP) undefined—those issues show up as claims later.