In buildings and architecture, as-built drawings, sometimes referred to as as-found or record drawings, are technical plans that accurately portray the constructed physical characteristics of a building and/or it's components, based on field measurements and other data collected from the building site itself. In the past, these drawings were created manually by drafters using tape measures and grid paper. Today, the process of creating as-built drawings involves laser survey equipment, reality capture systems, Computer Assisted Drafting (CAD), and Building Information Modeling (BIM).

Architectural documentation typically encompasses construction drawings, feasibility plans, permit plans, mechanical, electrical and plumbing (MEP) layouts, elevations, sections, renderings, CAD, and BIM models. These documents usually signal design intent, illustrating how an Architect, Engineer, or Designer envisions the finished construction of a building and its components.

In practice, actual construction often differs from the original plans due to variations in real-world fabrication, installation methods, material choices, change orders, and ever-evolving tenant improvements and mechanical updates. Things simply aren't built "exactly" to plan. This is especially prevalent in commercial, institutional, flex, and multi-occupant buildings, leading to significant discrepancies between constructed buildings and the original construction drawings. To address this, updated as-built documents provide stakeholders with an accurate representation of their physical assets at any given time.

In recent years, advancements in Reality Capture and LIDAR technology have revolutionized the acquisition and utilization of as-built data. These technologies enable the rapid collection of spatially accurate point clouds, which are easily imported into CAD and BIM systems to create as-built plans and digital twins. This documentation can be utilized by building owners and their assignees to inform project management, building leasing, operations, and marketing. For architects, engineers, and builders, as-built models/drawings support enhanced site awareness and predictability, clash detection, and deviation analysis throughout the construction process.

Maintaining accurate as-built records is essential, as outdated or incomplete building information can lead to costly transaction errors, construction delays, and operational inefficiencies. For older facilities, as-built drawings are frequently outdated or missing, whereas for newer buildings, establishing a reliable as-built baseline is key for effective management moving forward. Throughout the building lifecycle, regular updates can assure continual as-built accuracy and dependability.