Construction documents that show the actual installed conditions of a building project, including changes made during construction from the original plans.

A record drawing, also known as an as-built drawing or red-line drawing, is a construction document that accurately depicts the actual installed conditions of a building project, including all changes, modifications, and deviations from the original construction documents that occurred during the construction process. These drawings serve as the definitive record of what was actually built, showing the precise locations of structural elements, mechanical systems, electrical components, plumbing installations, and other building features as they exist in the completed structure rather than as originally designed. Record drawings are essential documentation for building owners, facility managers, and future renovation or maintenance work, providing accurate information about concealed systems, actual dimensions, and field modifications that may not be apparent from visual inspection alone, making them invaluable references for the ongoing operation, maintenance, and modification of buildings throughout their service life.

Record drawings are utilized in various construction and facility management applications including building handover processes where contractors provide owners with accurate documentation of completed work for warranty, maintenance, and operational purposes, facility management operations where record drawings enable efficient maintenance, repair, and system troubleshooting by showing actual locations and configurations of building systems, renovation and addition projects where architects and engineers need accurate information about existing conditions to design compatible new work, emergency response planning where first responders and facility personnel need to understand building layouts, system locations, and emergency equipment placement, regulatory compliance documentation where building officials and inspectors may require record drawings to verify code compliance and permit closure, and asset management programs where property owners maintain comprehensive records of building components and systems for lifecycle planning and capital improvement budgeting. Each application benefits from the accuracy and completeness that record drawings provide.

The creation and content of record drawings involves systematic documentation of changes made during construction including field modifications to structural elements, routing changes for mechanical, electrical, and plumbing systems, actual dimensions and locations that differ from design drawings, material substitutions and specification changes approved during construction, and additional work or scope changes that affect the final building configuration. Record drawings typically include architectural plans showing actual room layouts, door and window locations, and finish materials, structural drawings documenting actual framing, foundation, and connection details, mechanical drawings showing HVAC system routing, equipment locations, and control sequences, electrical drawings indicating actual circuit routing, panel locations, and device placements, plumbing drawings showing pipe routing, fixture locations, and system configurations, and site drawings documenting actual utility locations, grading, and landscape features. The level of detail and accuracy required varies by project type and contractual requirements.

Fun Fact: The practice of creating “as-built” drawings dates back to ancient Roman construction projects, where builders documented actual construction details on stone tablets for future reference, establishing the principle that accurate records of completed work are essential for long-term building management.

• Elevation Drawing
• Section Drawing