Most variation claims don't arise because something genuinely unexpected happened — they arise because accurate existing condition data wasn't captured before works began. This guide makes the commercial case for 3D scanning: pre-construction surveys, as-built verification, and what the data protects on UK construction and infrastructure projects.

3D laser scanning captures the complete geometry of a site or structure as a measurable point cloud — delivered as CAD drawings or BIM-ready outputs. This guide explains how it works on a construction site, when it makes sense, and what the deliverables actually look like.