Floor plan to 3D model: how to turn a floor plan into a flat you can walk through (2026)

Last checked: 20 October 2026. Written by the Flatwalk team.

Short answer. There are four ways. The fastest is to photograph the plan and let an app read it, which takes a few minutes. You can also draw the plan by hand in an app (about half an hour for a flat), scan the rooms with your phone's camera if you have no plan, or pay someone to model it. Whichever you choose, check one real measurement afterwards, so everything else is to scale.

Floor plan photo to 3D, freeHow to read a floor planMeasure a room with your phone

The four ways, compared

Way 1: photograph the plan

1. Find the best copy. A PDF or a sharp image from the listing beats a photo of paper.
2. If you photograph paper, lay it flat, shoot straight down in even light, and keep the whole plan in frame.
3. Upload it to an app that reads plans. It finds the walls, doors and windows and builds the rooms.
4. Check one wall. Measure one real wall, or use a size written on the plan, and correct it in the app. A plan with no sizes on it will come out the wrong scale until you do.
5. Fix what it missed. Open-plan spaces and small halls are the usual mistakes.

Apps that do this: Flatwalk (Android; one free conversion, and everything after the conversion is free for one flat), RoomSketcher (one free conversion, then $20 a floor or credits on a paid plan), Planner 5D and Home Planner AI (on their paid plans).

Way 2: draw it

Start with the largest room. Draw its outline, type the real lengths, then add neighbouring rooms against its walls so they share them. Add doors and windows last. Most planner apps do this for free.

Way 3: scan the room

Newer phones can measure a room through the camera: you stand in the middle and mark each corner on the floor. It works best in an empty or tidy room with visible corners. Expect to be within a few centimetres, not millimetres.

Way 4: pay someone

Visualisation studios, and some estate agents, will build a model from your plan. It costs the most and takes the longest, and it is the right choice when the pictures are for selling.

Then walk it

A view from above tells you whether furniture fits on the floor. Walking through at eye level tells you the rest: whether a door opens fully, what you see from the sofa, how wide a passage feels. If you are about to buy something large, place it at its true size and walk past it before you pay.

Common mistakes

• Trusting the scale. Always check one measurement.
• Forgetting wall thickness. Inside sizes are what furniture needs.
• Ignoring door swings and radiators. They take more room than they seem to.
• Planning in a perfect empty box. Add the things that are really there: pipes, sills, low ceilings.

Questions people ask

Can I turn a floor plan into 3D for free? Yes. Drawing it yourself is free in most apps. For reading a plan from a photo, Flatwalk and RoomSketcher each give one free conversion.

How accurate is a 3D model made from a photo? The layout is usually right; the scale depends on the sizes printed on the plan. Check one wall and correct it.

Can I do it on a phone? Yes. Photographing, drawing and scanning all work on a phone.

What if my plan has no measurements? Measure one wall yourself and enter it. The rest scales from that.

Flatwalk in pictures

Lights

Add ceiling lights, lamps and LED strips and see the room lit.

Your flat in its city

Give the address and see the street and buildings around you.

Sun for your address

Real sunlight by date and hour.

One piece, in your own room

Stand a sofa on your own floor at its true size before you buy.

Detail

Kitchens, wardrobes and bathrooms built piece by piece.

Made for a thumb

Tap a thing and its choices appear.

Swipe for more. Every picture is the app itself.