The short answer to the as-built vs record drawings question: as-built drawings are the field-marked set that captures what was actually constructed on site, every deviation, relocation, and substitution noted as the work happened. Record drawings are the cleaned-up, formalised set the design team produces afterward, incorporating those field changes into a tidy reference document for the building owner. In other words, as-builts are the raw evidence; record drawings are the curated archive. They are related stages of the same goal, an accurate picture of the finished building, but they are produced by different people, at different moments, with different levels of rigour.
In our studio in Vilnius we deal with both constantly, and the confusion is understandable: contracts and clients often use the two terms interchangeably, and in some markets "as-built" is simply the umbrella word for everything. But when money, liability, or facilities management is on the line, the distinction matters.
What as-built drawings actually are
As-built drawings are the working record kept during construction. They start as the issued-for-construction set and accumulate red-line markups as the build progresses. The site team, usually the contractor or the relevant subcontractor, annotates them whenever reality diverges from the design intent.
Typical as-built markups capture:
- Routing changes for pipework, ductwork, conduit and cabling that had to dodge an unforeseen obstruction.
- Dimensional adjustments, a wall moved 200 mm, a door opening widened.
- Substituted products or equipment with different footprints or connection points.
- Buried or concealed services with their final measured positions.
- Field-resolved clashes that were never formally drawn through an RFI.
The defining trait of as-builts is that they are messy and honest. They are not meant to be pretty, they are meant to be true. They are often hand-marked on printed sheets or red-lined directly on a PDF, and the value is entirely in their accuracy, not their presentation.
What record drawings are
Record drawings come next. The architect or engineer of record takes the contractor's as-built markups, verifies them where possible, and folds the changes back into the original CAD or BIM model to produce a final, coherent set. The result reflects the completed building in the same drafting standard as the original construction documents, clean, fully dimensioned, properly titled and stamped.
Record drawings are what the owner files for the long term. They feed facilities management, future renovations, maintenance planning, lease fit-outs and code compliance years down the line. Because a licensed professional typically certifies them, they carry more formal weight than a field-marked as-built, but only as much as the underlying as-built information was accurate.
As-built vs record drawings: the key differences
- Who produces them: as-builts come from the contractor and trades in the field; record drawings come from the design professional of record.
- When: as-builts are created continuously during construction; record drawings are produced after completion.
- Form: as-builts are red-lined markups, often rough; record drawings are formalised, clean deliverables.
- Authority: record drawings are usually certified or stamped; as-builts are a working field record.
- Purpose: as-builts document change as it happens; record drawings serve as the lasting reference for the owner.
Why the terms get confused
Three things blur the line. First, regional usage: in much of North America the two are distinguished fairly strictly, while elsewhere "as-built" is used loosely for both stages. Second, contract language: a specification may demand "as-built record drawings," collapsing the two ideas into one deliverable. Third, workflow reality, on smaller projects there may be no separate record-drawing step at all, and the marked-up as-builts simply become the final handover set.
Our advice from the practitioner side: never assume. Read the specific contract definition and the deliverables clause. If a client asks for "as-builts," confirm whether they want raw field markups or a formalised, certified record set, the effort and liability are very different.
Getting the handover right
Whatever the terminology, the handover set lives or dies on accuracy. A few habits that serve us well:
- Mark up changes as they happen, not from memory at project end.
- Keep one authoritative copy of the as-built markups rather than scattered annotations across multiple prints.
- When producing record drawings, log what came from verified field measurement versus what was assumed, future readers will thank you.
- Deliver the final set in a durable, openable format. These drawings need to be readable in ten or twenty years, so a flattened, well-organised PDF set alongside the native files is the safe baseline.
FAQ
Are as-built and record drawings the same thing?
No, though they are closely related. As-builts are the field-marked record of what was actually constructed, produced by the contractor during the build. Record drawings are the formalised, often certified set the design team produces afterward by incorporating those field changes. Some contracts merge the two, so always check the specific definition.
Who is responsible for producing each one?
The contractor and trade subcontractors maintain the as-built markups in the field. The architect or engineer of record typically produces the certified record drawings from that information after construction is complete.
Do I always need both?
Not necessarily. On large or regulated projects you usually need both stages. On smaller jobs the marked-up as-builts may simply serve as the final handover set. The contract deliverables clause is the deciding factor.
For architects and engineers handling these large CAD-exported handover sets day to day, the 50-200 MB+ drawings that bog down most viewers, Ncored is a fast desktop PDF editor built by working architects to mark up and review them smoothly, with a free 14-day trial at ncored.com.