An as-built drawing documents a structure exactly as it was actually constructed, reflecting any changes made in the field that differ from the original design.
Owners and future contractors rely on as-builts to know what’s really behind a wall or under a slab.
What Does an As-Built Drawing Capture?
- Actual pipe and wire routing as installed
- Field changes from the original design
- Final dimensions and locations of structural elements
- Any substitutions made during construction
Why Are As-Built Drawings Important?
A plumber tracing a pipe route years later benefits enormously from an accurate as-built showing where a line was rerouted around an unexpected obstruction. Without as-built documentation, future renovations often involve exploratory demolition just to find out what’s actually there, adding time and cost to work that should be straightforward.
As-Built Drawing vs. Construction Drawings
Construction drawings show what was planned before work began; as-built drawings show what was actually built once the project wrapped up. The two often diverge whenever field conditions forced a change from the original design.