As-Built Drawings & Project Handover
As-built drawings record what was actually installed, not just what was designed. This guide explains why accurate as-builts matter, what a complete handover package contains, and how they support a building's operation and future approvals.
Every construction project ends with a handover — the formal transfer of the finished building from the contractor to the owner or operator. At the heart of that handover are the as-built drawings: the updated set of drawings that records exactly how the building and its MEP systems were installed, including every change made during construction.
Design drawings show intent; as-builts show reality. Because real installations always differ from the original design in some details — a rerouted pipe, a relocated panel, a revised cable run — accurate as-builts are essential for operating, maintaining, modifying and re-approving the building over its whole life. This article explains what as-builts are, what else a handover dossier contains, and why getting it right protects the owner long after the contractor leaves.
How it works
As-built drawings start as the approved construction (IFC, issued-for-construction) drawings and are updated to reflect what was actually built. Throughout construction, deviations are captured — often as red-line markups on site — and then formalised into a clean as-built set. The result is a drawing package that a future engineer can trust to show where services actually run, not where they were once intended to run.
Why this matters becomes obvious at the first maintenance or modification. An operator isolating a circuit, tracing a leaking pipe or adding a new tenant fit-out relies on the as-builts to know what is behind the wall or above the ceiling. Inaccurate as-builts cause wasted time, safety risks and costly rework, while accurate ones make the building maintainable and safe to alter.
As-builts are only one part of the handover dossier. The package also includes operation and maintenance (O&M) manuals — the documents that tell the operator how each system works and how to service it — covering equipment data, maintenance schedules, spare-parts lists and manufacturer literature. Together with the as-builts, the O&M manuals are the operating memory of the building.
The dossier further includes warranties and certificates, training records, and access provisions. Warranties and guarantees define what is covered and for how long; test, commissioning and authority certificates evidence compliance; training records confirm the operator's staff were shown how to run the systems; and keys, access codes and credentials are formally transferred. Each element closes a loop between what was built and what the operator now owns.
Finally, handover is a formal, staged event, not just a delivery of boxes. The works are completed and snagged, tested and commissioned, inspected for authority sign-off, and only then handed over with the full dossier. A complete, accurate handover is also what enables future authority approvals — alterations, renewals and re-inspections all depend on records that reflect the real building.
Main types
In the UAE
- On UAE projects, an accurate handover dossier — as-builts, O&M manuals, warranties, certificates and training records — is expected at completion and supports both operation and future authority approvals.
- Authority and completion certificates (such as the Civil Defence completion NOC and the building completion certificate) form part of the records handed over and evidence that the building was built in compliance.
- Because alterations, renewals and re-inspections depend on records that reflect the real installation, accurate as-builts protect the owner across the building's whole life, including future Civil Defence and utility approvals.
How GPR applies this
GPR delivers complete, accurate handover packages on its Abu Dhabi MEP projects — producing as-built drawings that reflect the real installation, compiling O&M manuals, warranties, test and commissioning records and training documentation, and formally transferring access and credentials. By treating handover as a staged, documented event, our teams give owners a reliable operating memory that supports maintenance and any future authority approvals.
Frequently asked questions
What are as-built drawings?
They are the updated drawings that record how a building and its MEP systems were actually installed, including changes made during construction — reality rather than original intent.
Why do as-builts matter after handover?
Operators rely on them to maintain, modify and re-approve the building; inaccurate as-builts cause wasted time, safety risks and rework, while accurate ones keep the building maintainable.
What is in a handover dossier?
Typically as-built drawings, O&M manuals, maintenance schedules, warranties, test and commissioning records, authority certificates, training records, and transferred keys and access credentials.
What is the difference between design and as-built drawings?
Design drawings show what was intended; as-built drawings show what was actually installed, capturing every deviation made during construction.
How does handover support future approvals?
Alterations, renewals and re-inspections depend on records that reflect the real building, so accurate as-builts and certificates make future authority approvals far smoother.