Updating Bills of Quantities After Approved Change Orders

Change orders are a normal part of most construction projects. Designs evolve, site conditions differ from assumptions, and owners refine their requirements. What matters is how each change is reflected in the project's commercial records. If the bill of quantities (BOQ) is not updated promptly and accurately, payment claims, cost reports and the final account can quickly drift apart.

Linking Each Change Order to the BOQ

Once a change order is approved, quantity surveying should translate it into clear adjustments to the BOQ. This means identifying which items are affected, whether quantities increase or decrease, and whether new items need to be introduced with agreed rates.

• Revised quantities for existing items, measured from the updated drawings.
• New items for work not covered in the original BOQ, with descriptions that match the specification.
• Omitted items or quantities, recorded clearly so they are not claimed later.
• A reference to the change order number and the drawing revisions on which the update is based.

Linking every adjustment to updated drawings provides a traceable record. Anyone reviewing the BOQ later can see why a quantity changed and which document supports it.

Keeping Payment Claims Consistent

Monthly payment claims are typically assessed against the BOQ. If the BOQ still reflects the original scope, the contractor may claim work that has no approved item, or the consultant may be unable to certify work that has legitimately been added. Updating the BOQ after each approved change keeps the basis for certification clear and reduces disagreements during claim reviews.

It also helps avoid duplication. When changed work is tracked against specific items and revisions, it becomes easier to confirm that the same quantity is not paid twice under different headings.

Forecasting the Remaining Cost

An up-to-date BOQ is also a forecasting tool. By comparing the revised total with work already certified, the project team can estimate the remaining cost more reliably and give the owner an early view of the expected final account.

VARIO (Al-Mukhtalef) provides quantity surveying and cost control support that keeps BOQs aligned with approved changes and current drawings, helping owners maintain consistent payment claims and a realistic picture of the project's remaining cost.