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Sketch to CAD with AI

Sketch to CAD with AI

A lot of design still starts on trace over a plotted plan, or as a phone photo of a whiteboard after a coordination meeting, and someone then spends hours redrafting it in CAD. Nomic reads the sketch, scans of hand markups, and the background underneath, drafts the DWG in your standards, and flags every mark it cannot read.

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Last reviewed: November 2026

You send

  • Photos or scans of the sketch or marked-up prints
  • The background the sketch was drawn over
  • Your CAD standards and block library
  • A note on intent, such as an enlarged plan for permit

Nomic hands back

  • A drafted DWG in your layers, blocks, and dimension styles
  • A list of unreadable or ambiguous marks with locations
  • Conflicts between the sketch and the background
  • A plotted PDF with Nomic's work clouded
1234567ABCGUEST ROOM301GUEST ROOM302GUEST ROOM303GUEST ROOM304SUITE305GUEST ROOM306GUEST ROOM307GUEST ROOM308GUEST ROOM309GUEST ROOM310GUEST ROOM311GUEST ROOM312GUEST ROOM313GUEST ROOM314GUEST ROOM315GUEST ROOM316GUEST ROOM317GUEST ROOM318STAIRS2ROOM TAGDOORROOM TAGDOORROOM TAGDOORROOM TAGDOORROOM TAGDOORROOM TAGDOORSTAIR13 OBJECTS FOUND ON THIS SHEET27'-3"27'-0"27'-3"27'-3"27'-0"27'-3"94'-8"1AFLOOR PLAN TAKEOFFSCALE: 1/8" = 1'-0"N1234CONSULTING ENGINEERSREVISIONS1ISSUED FOR REVIEWPROJECTRIVERSIDE HOTELSCALE1/8" = 1'-0"DATE04/15/2026KEY PLANSHEET TITLEFLOOR PLANTAKEOFFSHEET NUMBERA-101

On the sheet

Floor Plan Takeoff, annotated

A floor plan read by software: rooms, doors, and stairs found on the sheet and counted.

  1. 1Room tag read with its name and number
  2. 2Door found by its swing
  3. 3Stair found from its treads
  4. 4Count rolled up for the sheet

The problem

Sketches are fast to make and slow to draft

A principal can sketch a restroom core on trace in 10 minutes. The drafter then has to interpret the sketch: it is roughly to scale at best, half the dimensions are written and half are implied, and a margin note says "match L2" without saying which revision. The drafter either guesses or walks over to ask, and on a deadline week neither happens quickly.

Marked-up prints are harder. Red pen, highlighter, and pencil overlap on a plotted sheet, an arrow points at the wrong grid line, and a cloud on one sheet refers to a detail on another. Misreading one handwritten dimension, a 4'-6" read as 4'-0", turns into a door that does not fit or a corridor that drops below the clear width the code requires.

01 / Read

Reads trace, red pen, and whiteboard photos

Nomic reads hand sketches on trace, scanned marked-up prints, Bluebeam markups, and phone photos of whiteboards, and lines each one up with the background it was drawn over. Written dimensions take priority over sketched geometry, because hand sketches are rarely to scale, and the background supplies what the sketch leaves implied.

  • Hand sketches on trace over plotted plans
  • Scanned prints with red pen and pencil markups
  • Whiteboard and napkin photos from meetings
02 / Draft

Drafted on the background, in your standards

Nomic works in CAD on its own computer and drafts the sketch over the real background: walls aligned to the grid, fixtures from your block library at their true sizes, dimensions in your dimension style. Where the sketch and the background disagree, such as a wall sketched through a column, Nomic draws to the background and notes the conflict.

  • Fixtures and doors from your block library at true size
  • Written dimensions honored and checked against the grid
  • Conflicts between sketch and background noted
03 / Flags

Anything unreadable comes back as a question

Nomic flags every mark it cannot read with confidence instead of guessing at handwriting. Each flag shows where the mark sits on the sketch or print, what Nomic thinks it might say, and what Nomic drew in the meantime, and the drawing is checked against the code you name before it comes back.

  • Illegible dimensions and notes listed with locations
  • Accessibility clearances checked on enlarged plans
  • Everything Nomic drew clouded for review

Checked against

The code and documents behind every sheet

Name the editions the project is designed to and Nomic checks its own drawing against them before handing it back. Your engineer or architect of record makes the final call and stamps the set.

  • The sketch and its written dimensions
  • The architectural background and grid
  • 2010 ADA Standards or ICC A117.1 for enlarged plans
  • IBC and IPC requirements the drawing triggers
  • Your firm CAD standards

How it works

From a sentence to a stamped set

  1. Step 1

    Ask for the drawing

    Say what the sheet needs to show and attach the backgrounds, markups, cutsheets, or photos. A sentence is enough to start.

  2. Step 2

    Nomic drafts it in CAD

    Nomic works in CAD on its own computer, on your layers and blocks, following how your firm drew the same thing before. It saves real DWG files to the project.

  3. Step 3

    Nomic checks its own work

    The drawing is checked against the code editions you name and the source documents. Everything Nomic drew is clouded, and open questions are listed.

  4. Step 4

    Your team reviews and stamps

    Your engineers and architects review the clouded changes, make the final call, and issue the set under their own stamp.

FAQ

Frequently asked questions

Yes. Nomic reads photos and scans of hand sketches, lines them up with the background, and drafts a DWG in your layers, blocks, and dimension styles. Marks Nomic cannot read are flagged instead of guessed.

No. Written dimensions and the background set the geometry, and the sketch shows intent. When a sketched line and a written dimension disagree, Nomic follows the written dimension and notes the difference.

Yes. Nomic reads scanned hand markups and Bluebeam markups, makes the changes in the DWG, and clouds each one. Anything Nomic cannot read, like an overlapping note or a smudged number, comes back on a list with its location.

Nomic can draft from a whiteboard photo when the sketch ties to a known background, such as a corridor layout drawn over a printed plan or a riser sketched with floor labels. Glare and camera angle make some marks unreadable, and those marks are flagged.

The person who sketched it. Nomic drafts what the sketch and notes say and lists every interpretation it had to make, and the architect or engineer of record reviews the drawing and makes the final call.

Keep reading

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Sketch to CAD with AI: Hand Sketches and Markups to DWG | Nomic