An accurate measured building survey prevents the design rework, costing errors and on-site surprises that cost far more to resolve later than the survey costs to commission — making it one of the cheapest forms of risk reduction available.

A retained survey engineer gives main contractors guaranteed availability, a consistent control network and a single accountable point for every survey operation — turning a reactive cost into a planned one.

Most final account disputes on UK construction projects are data problems — the pre-construction conditions weren't surveyed, the setting out register is incomplete, or there's no as-built record of what was actually constructed. This guide explains how each type of survey data protects the contractor's position and how to plan for it from the start of the programme.