As-built vs measured survey drawings: what is the difference?
The words get mixed up on quotes and in permit offices: as-built, measured survey, existing conditions plan, record drawings. They overlap, but they are made differently, for different people, at different prices. Here is how to tell them apart and pick the one your remodel actually needs.
Updated 2026-10-10. Usage varies by region and by firm, so ask any provider what their deliverable contains before you compare prices.
Four names, two families
It helps to sort the terms by where the information comes from.
- As-built drawings (record drawings) start from a design. At the end of a construction job the contractor marks up the design drawings to show what was actually built: a moved wall, a rerouted duct, a different window size. The result is a corrected version of the original design.
- Measured survey drawings start from the building itself. Someone measures what is there, with no design to correct, and draws it from scratch.
- Existing conditions plans is the name permit offices and designers use for the "before" sheets in a remodel set. They can come from either family.
- Land or boundary surveys are a different thing altogether: a licensed land surveyor locating property lines and structures on a lot. They are not floor plans, and only a licensed surveyor can produce one.
In everyday residential work, "as-built" has stretched to mean any drawing of a house as it stands. Our article on what as-built drawings are and what they cost uses the word that way, because that is how most homeowners and remodelers search for it.
How each is made
Marked up record drawings
Only possible when a design set exists and someone tracked changes during the build. For a house built in the last few years by one builder, the record set may sit in the builder's files or the permit archive. For an older house, there is usually nothing to mark up, or the old plans no longer match after decades of changes.
Measured survey
Three common methods, from cheapest to most precise:
- Tape or laser distance meter plus photos. A person sketches each room, measures walls, openings and ceiling heights, and photographs every wall. A drafter turns it into a scaled plan. See how to measure a room for drawings.
- Phone or 360 camera scan. Fast, good for a rough layout, but often weak on wall thickness, fixture positions and anything hidden behind furniture. Confirm key dimensions by tape.
- Terrestrial laser scan. A scanner builds a point cloud of the building, which a drafter traces. Very accurate and priced accordingly. It suits large, complex or historic buildings more than a typical single family remodel.
Accuracy: how close is close enough?
Accuracy costs money, so match it to the job.
| Job | What usually matters |
|---|---|
| Kitchen or bath remodel | Wall to wall lengths within about a quarter inch, fixture and window positions, ceiling height |
| Flooring, paint, drywall pricing | Room areas and wall heights; a small error changes the count by a sheet or a box at most |
| Addition or structural change | Wall thicknesses, floor levels, framing direction, plus an engineer's own site visit |
| Historic facade or heritage record | Laser scan level detail, often with photogrammetry |
A tape survey done carefully is enough for most interior remodels. What matters more than the instrument is the routine: measure each wall, measure the diagonals of every room to catch rooms that are not square, and write down ceiling heights in more than one spot.
Marked up as-built vs fresh measured survey: pros and cons
| Marked up record drawings | Fresh measured survey | |
|---|---|---|
| Starting point | The original design set | The building today |
| Cost | Low if the set exists and is current | Priced per square foot plus any site visit |
| Risk | Silent drift: changes nobody recorded | Measurement error if the routine is sloppy |
| Shows hidden work | Sometimes, if the builder recorded it | No, only what can be seen and measured |
| Best for | Recent builds with a disciplined builder | Older houses and anything remodeled before |
If you have old plans, do not throw them away even when they are wrong. They show the original structure, which helps when someone has to guess where a beam runs. Use them as a reference and confirm every dimension you will build from.
Which one does a remodel need?
For most residential remodels in an existing house, you need a measured existing conditions plan: the rooms in scope, drawn to scale from current measurements, with doors, windows, fixtures and ceiling heights. That plan becomes the "existing" sheet in a permit set and the base for the proposed layout. If a recent, reliable record set exists, a drafter can start from it and verify on site, which saves time.
You do not need a land survey for an interior remodel. You may need one for an addition, a new deck near a property line, or a fence dispute, and that is a licensed surveyor's job.
What to ask for in a quote
- Which method: marked up record set, tape survey, phone scan or laser scan.
- Who measures, and whether a site visit is in the price.
- The sheet list: floor plans only, or plans plus interior elevations and sections.
- The file formats: PDF at 11x17 or 24x36, and CAD if your designer needs it.
- What happens if a dimension turns out wrong on site.
What none of these drawings do
No floor plan, however it is made, certifies the structure or proves that past work was permitted. If you plan to remove or change a bearing wall, you need a licensed engineer or architect. Property lines need a licensed land surveyor.
We draw measured existing conditions plans from measurements and photos you or your contractor supply, then draw the proposed layout and count the materials from the same model. See as-built drawings for what we need from you.