BOQ vs Quantity Takeoff: What's the Difference?
While a quantity takeoff is the process of measuring raw materials from architectural drawings, a Bill of Quantities (BOQ) is the formal document that structures these items with rates and terms for contractor bidding.
Understanding the Quantity Takeoff Process
A quantity takeoff (often referred to simply as a "takeoff") is an internal calculation. The estimator opens CAD blueprints or paper drawings and measures the length, area, or volume of components. For example, they count the doors or calculate that the perimeter walls require 4,500 square feet of drywall. Takeoffs do not necessarily list pricing β they are raw dimensional data.
Comparing a Takeoff to a finished BOQ
A Bill of Quantities (BOQ) takes the takeoff data, structures it, adds contractual descriptions, and provides empty rate columns for builders to quote against. The BOQ serves as a legally binding document in standard construction contracts (like JCT or FIDIC). It ensures both parties agree on what constitutes a change of scope if dimensions alter on-site.
When to Use Which Tool
If you are in the early feasibility phase, a quick quantity takeoff is enough to establish a rough budget. However, once you transition to tendering, contracting, and purchasing, you must compile a full BOQ. Our AI tools automate both steps at once, giving you a detailed quantity takeoff and a formatted BOQ in one go.