The real cost of a setting-out error is rarely the survey — it's the rework, delay and disputes that follow. A misplaced foundation can cost tens of thousands, long after the small cost of getting it right the first time.

An engineering register records a site's survey framework — control points, topographic data, calibration certificates and survey targets — while the site diary logs the daily setting out. Kept separate and complete, the two form a defensible record that protects the contractor at final account.

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 clients ask for a 'GPR survey' when what they actually need is PAS 128 detection. This guide explains what GPR can and can't do, how it fits into Type B investigations, and what a proper survey pack should include.