Tested 21 September 2026
Can ChatGPT Make a Floor Plan? We Ran Three Sketches Through It
The short answer. Yes — ChatGPT can make a floor plan, and on three hand-drawn sketches it redrew every one of them, kept the room names, and held the layout through two more rounds of edits. What it does not do is draw the rooms to the measurements it writes on them.
Yes. We gave ChatGPT three hand-drawn sketches, asked it to redraw each one, then changed each plan twice more. It kept every room name we wrote, held the outline steady between rounds, and edited its own drawing instead of starting over. The thing it does not do is draw to the measurements it writes down.
- 3 sketches × 3 rounds
- Screenshots and originals
- Measured, not guessed
- Our own misses included
How the test was run
Everything below came out of one afternoon, 21 September 2026. The same wording went to both sides, word for word, and nothing was re-rolled to get a nicer picture.
Three sketches, not one
A phone photo of a creased graph-paper flat plan in ballpoint; a pencil bungalow on lined notebook paper; an L-shaped house drawn in marker on plain white paper. Each carries room names and two or three written dimensions, so you can check the result yourself.
Three rounds each
Round 1: redraw it, and one standing rule — use my room names exactly as written. Round 2: turn one room into something else, leave everything else alone. Round 3: add a dining table and four chairs. Round 3 is the test of whether the round 1 rule survived.
Same words both sides
ChatGPT ran in a normal chat on chatgpt.com, one fresh conversation per sketch. FloorDrafter ran on this site with the same sentences typed in: the flat and the L-shaped house through the sketch converter, the bungalow through the studio. Both sides got one attempt per round.
Can ChatGPT make a floor plan from a description?
If you have no drawing and you want to see an idea, yes, and it is quick.
Ask for "a two-bedroom flat with an open kitchen and a balcony" and you will get a labelled plan that looks the part in under a minute. For sketching out an idea, arguing with yourself about whether the study goes next to the kitchen, or putting a picture in front of a builder before the first conversation, that is often all you need.
What comes back is a picture. It is not measured, it is not to scale, and it is not a drawing anyone downstream can open and edit. That matters less than you would think at the idea stage and a lot more once someone has to build, let or sell from it.
If that is where you are: describe the plan you want and get one back
Can ChatGPT redraw the floor plan I already have?
This is the part nobody had published, so it is the part we tested hardest. On all three sketches ChatGPT produced a clean plan with the room names copied exactly — LIVING / KITCHEN, BEDROOM 2, EN-SUITE, FRONT DOOR — and the written dimensions carried across.
The L-shaped sketch was the one we expected to break, because an L is the shape a model is most tempted to tidy into a rectangle. It did not break. ChatGPT kept the L, kept the terrace open instead of walling it in, and kept the hyphen in EN-SUITE.
So the honest answer to the question people actually type — can it redraw my plan — is yes, it can, and on these three it did it first time.
The other two sketches
Same three rounds, same wording. Both are shown here because a single sketch proves very little either way.
What happens when you ask ChatGPT for a change?
Round 2 was "turn BEDROOM 2 into a home office, leave everything else as it is". Round 3 was "add a dining table with four chairs". The walls stayed where they were.
Between rounds it is editing its own picture rather than drawing a new one. Comparing round 1 with round 3 pixel by pixel, the outer walls and the dimension strings sit within a pixel or two of where they were; what moved was the room label, nudged up to make space for the furniture.
The one thing worth knowing is that "turn X into Y" is read as decoration, not as a change to the plan. Asked to turn a bedroom into a home office it drew a desk, a chair and some shelves and left the room labelled BEDROOM 2 — on two different sketches. Asked to turn a study into a second bedroom, it renamed the room. It is following your verb, so pick the verb you mean: say "rename" if you want the label changed, "furnish" if you want the furniture.
“every time we added a rule an existing one was lost”
Tests published earlier in the year reported the same thing, and they are not wrong about what they saw. We set out to reproduce it in September 2026 and could not. The standing rule we set in round 1 — use my room names exactly as written — was still being honoured in round 3, on all three sketches, and between rounds the model edits its own picture rather than drawing a new one. If you are reading a test that says plans fall apart after a few messages, check the month it was run. On this one thing, the model got better.
The one thing it gets wrong: the plan is not drawn to its own numbers
ChatGPT copies your written measurements onto the drawing correctly. It does not draw the rooms to them. You can check this on any plan it gives you, with nothing but a ruler on screen.
How to check it yourself in thirty seconds
- Find two dimensions written along the same edge of the plan, say 4.20 m and 3.5 m.
- Measure both spans in millimetres on screen, or in pixels in any image viewer.
- Divide each by the metres it claims. The two answers should be the same number.
- The gap between them is how far the drawing is from its own labels.
What we measured
Graph-paper flat
- Spans on the plan
- 4.20 m and 3.5 m
- Gap between them
- 9.9% — the 3.5 m span drawn as 3.85 m
Pencil bungalow
- Spans on the plan
- 6.40 m and 4.8 m
- Gap between them
- 7.6–8.1% — the 4.8 m span drawn as 5.19 m
L-shaped house
- Spans on the plan
- 8.5 m and 3.60 m
- Gap between them
- 2.1%
Three rounds each, so nine measurements; the figure held steady within a sketch across all three rounds. The script that produced these numbers is in our repository, and you can run it on a plan of your own.
What that means in practice
It means the numbers on the drawing are the thing to trust, and the drawing itself is not something to scale off. Thirty-five centimetres is a fridge that does not fit, or a door that opens into a worktop. For a listing photo or a leaflet, nobody will ever notice. For anything where a person is going to hold a tape measure against it, it matters.
This is not a reason to avoid AI floor plans, ours included. No AI-drawn plan on this site is a survey either: the dimensions are drawn, not measured, and a plan that is going to be built from still needs someone to check it on site. It is a reason to keep the written measurements and treat the picture as a picture.
If your numbers are the point: how we redraw a sketch and hand it back beside your original
Can ChatGPT make a 3D floor plan?
A 3D floor plan from ChatGPT is a rendered picture of a plan, not a model.
It looks good, and it looks good immediately. But there is no file to open in a 3D program, and the picture is regenerated each time rather than being a view of something that exists — so the scale problem above applies to it as well, with one more round of redrawing on top of it.
If what you want is a dollhouse view of a plan you already have, that is a different job from asking for a picture: the layout has to survive the trip into 3D, which means the plan has to be the input rather than the prompt.
That route has its own page: floor plan to 3D model
Where it went wrong for us
The L-shaped sketch broke our side, not theirs, and it broke in a way that is worth showing.
The input was a clean marker drawing on white printer paper, photographed on a desk. Our redraw treated the desk, the shadow and the paper edge as part of what it was being asked to reproduce. We tried four times, through two different routes on this site, and got a photograph of paper every time. The two messier sketches — creased graph paper, lined notebook — never did this.
It is now a bug on our list rather than a footnote here. We are showing it because a comparison page that only prints the results where we look good is not worth reading, and because if it happens to you, you now know it is us and not your photo.
What a floor plan agent does differently
After this test, the honest list of differences is shorter than a comparison page normally claims, and none of the items on it are about drawing a prettier plan.
Your rules are written down where you can see them
The standing rule you set in round 1 goes into a project brief you can read and edit on screen — purpose, footprint, rooms, constraints. It is attached to every later version instead of living in the chat history. In this test it is the card that reads "use room names exactly as written on the sketch".
Every version stays on the canvas
Rounds 1, 2 and 3 sit side by side rather than scrolling away above each other, and you can branch from any of them. When a redraw comes back wrong — and ours did, on two of these three sketches — you compare it against the earlier one instead of scrolling back to find it.
A check sheet before you download
The redraw is put next to your original with a prompt to say whether it matches. Saying it is off does not cost anything; it is the step that catches a moved bathroom before it ends up in an email to a builder.
Files other software can open
A PNG, and a DXF you can open in CAD. The DXF is traced from the drawing and scaled from a standard door width, so it is a starting point to work over rather than a measured survey — but it opens, and a chat transcript does not.
The editing loop in detail: how the agent changes a plan you already have
Do you need to pay for ChatGPT to do this?
Not to try it. What the free plan rations is how many pictures you get in a day, and a test like ours is three pictures per sketch.
Image generation is on the free plan, and one redraw is one picture. The cap is a small number per rolling day and OpenAI moves it, so we are not printing a figure that will be wrong by the time you read this — the app tells you where you stand when you hit it. The practical effect is that a three-round project stalls partway through and you come back to it tomorrow. We ran ours on a paid account so no sequence was interrupted.
Nothing in this test needed a feature the free plan does not have. It needed more attempts in one sitting than the free plan gives you.
On this side: your first conversion needs no account
When is ChatGPT enough?
Often. If one of these is you, you do not need another tool and we would rather say so.
You have no drawing and you want to see an idea
A concept plan from a description is exactly what it is good at, and you already pay for it.
It is coursework, a mood board or a blog post
Nobody is going to measure it. A picture of a plan is a picture of a plan.
You are thinking out loud
Being able to argue with something about where the stairs go, in the same window where you write, is worth more than file formats.
You want one plan and then you are done
The version canvas, the brief and the check sheet pay off over a project. For one plan, one round, they are overhead.
Where it stops being enough is the day someone else has to act on the drawing: a builder pricing it, a landlord listing it, a client signing it off. That is when "not to scale" and "PNG only" stop being trivia.
Which AI is best for floor plans?
It depends on two things: whether you already have a drawing, and whether the layout in it has to survive. The four kinds of tool sort themselves out along those lines.
A general assistant (ChatGPT, Gemini, Claude)
- Good when
- You have no drawing, or you want a concept fast, or you want to talk it through
- Watch out for
- The drawing is not to its own measurements; you get a PNG and nothing a CAD program opens
An AI room designer (Planner 5D, REimagineHome, Coohom)
- Good when
- You want options you would not have thought of
- Watch out for
- It is designing, not copying — your layout is a suggestion to it
A drafting service (Fiverr, Upwork, or a local draftsperson)
- Good when
- It has to be right, and you can wait a day or two and pay per drawing
- Watch out for
- Turnaround and cost per revision; changing your mind twice gets expensive
A floor plan agent (this site)
- Good when
- You have a drawing, the layout has to stay, and you expect to change it a few times
- Watch out for
- Still AI-drawn: the dimensions are drawn, not surveyed, and a first redraw can come back wrong
A floor plan agent takes a drawing you already have, keeps its layout, and lets you change it in rounds. That is a different thing from a generator, which starts from a description, and from a drawing tool such as RoomSketcher or Floorplanner, in which you place every wall yourself.
Nobody in the first two rows will tell you their drawing is not to scale, so measure it. The check takes thirty seconds and it works on any of them, including ours.
If you are staying with ChatGPT: five prompts that fail less
These came out of the test, not out of a prompt library. Each one fixes something we watched go wrong.
- 1
Name the rule once, at the start, and say it is standing
"One rule for this whole project, keep it in every version from now on: use my room names exactly as written." Said this way it survived to round 3 on all three sketches.
- 2
Say rename or furnish, never "turn into"
"Rename BEDROOM 2 to HOME OFFICE and change nothing else" gets you a rename. "Turn BEDROOM 2 into a home office" gets you a desk and the old label.
- 3
Ask it to keep the numbers, not to invent them
"Copy the dimensions written on my sketch and do not add any others." Left alone, models like to add dimension strings that were never on your drawing and do not agree with the ones that were.
- 4
Photograph the paper flat, and say it is a sketch
"Here is a photo of a hand-drawn sketch — redraw it as a flat digital plan, not as a photograph." Worth saying to any tool; it is exactly the failure we hit ourselves on the marker drawing.
- 5
Change one thing per message
Two changes in one message is where a room quietly goes missing. One thing, look at it, then the next thing.
Questions people ask before they try this
Try it on your own sketch
Upload the drawing you already have and see what comes back beside it. If the redraw is off, say so — corrections do not cost credits.
