A survey carried out during or immediately after a construction project for record, completion evaluation and payment purposes. An as-built survey is also known as a 'works as executed survey' and documents the location of the recently constructed elements that are subject to completion evaluation.

As built surveys are often presented in red or redline and overlaid over existing design plans for direct comparison with design information.

The purpose of the As-Built Survey – also commonly called a Physical Survey – is to show the property “as it is built” at a particular point in time. While a pre-construction survey is performed to document conditions prior to construction work being performed, the As-Built survey is conducted to show the current state of the site at various stages throughout the duration of a project. It also serves as a close-out document to verify that the work authorized was completed to plans and in compliance with all relevant standards and regulations. An As-built survey builds upon the base map of a project, and includes research at local agencies, ground-level topography data and the documentation of visible site improvements. The advantage of this survey is that the new Base Map can be updated to show the current conditions of the site.