These final blueprints document the exact dimensions, geometry, and location of all elements as they were actually installed, rather than how they were originally designed. Contractors mark up the initial plans throughout the build to capture field modifications, rerouted pipes, or shifted walls. Owners and facilities teams rely on these updated records for future maintenance, renovations, and compliance.
Make sure the sparkies update the as-builts before we close up those walls, or we'll never find that conduit again.
The term often refers specifically to the red-lined drawings the superintendent keeps in the trailer and marks up daily during the build.
Also heard as
- record drawing
- red-line drawing
Related terms
Punch list
A master document tracking minor defects and incomplete tasks that a contractor must fix before final payment.
Submittal
A package of technical documents or physical samples submitted to the architect or engineer for approval before fabrication.
Practical completion
The milestone when a building is finished enough for the owner to move in and use it.