The same living room in three vertical slices: the original, a mid-century modern redesign and a coastal redesign

ChatGPT Interior Design Prompts: 12 Prompts That Actually Work

ChatGPT can restyle your living room, plan a furniture layout, pull a colour palette out of a Pinterest board and write the brief for your builder. The difference between a result you can use and a pretty accident is almost always the prompt.

Below are the ChatGPT interior design prompts we'd actually use, grouped by job, with the reasoning behind each so you can adapt them. They work in Google Gemini too.

The short answer: a good interior design prompt names the room, says what must not change (walls, windows, doors, camera angle), gives one clear style with a few materials, and describes the light. For edits, change one thing per prompt. For planning, give ChatGPT real measurements and ask it to reason in text before you ask for an image.

An ordinary living room with a brown fabric sofa, a glass coffee table and a black TV unitOriginal
The same living room with only the sofa changed to a deep green velvet sofa, everything else identicalOne change
Prompt 5 below, in action: only the sofa changed. The blind, the table, the TV and even the cushions stayed put. Made for this guide with Google's Nano Banana Pro model.

What makes a good interior design prompt?

Every prompt that works well has the same five parts. Miss one and the model fills the gap with a guess.

  1. The room: "this living room," with the photo attached.
  2. What stays: walls, windows, doors, ceiling height, floor area, camera angle.
  3. The style: one named style, not three. "Japandi," not "modern cosy Scandi Japandi boho."
  4. A few materials: "light oak, oatmeal linen, a paper lamp." Specific nouns beat adjectives.
  5. The light and output: "natural daylight, photorealistic interior photograph."

Prompts for redesigning a whole room

1. The restyle

Redesign this [room] in [style] style. Keep the exact room geometry: same walls, same window positions and sizes, same doors, same ceiling height, same floor area, same camera position and angle. Replace only the furniture, finishes, lighting and decor with [3 to 5 materials or pieces]. Photorealistic interior photograph in natural daylight.

This is the prompt behind every image in our interior design styles guide, where one room is shown in twelve styles.

The living room restyled as mid-century modern with a mustard sofa, leather lounge chair and walnut sideboard The living room restyled as coastal with a white linen sofa, jute rug and rattan coffee table
Prompt 1 with two different styles: mid-century modern and coastal. Same window, same doorway, same camera.

2. The budget makeover

Keep all the existing furniture exactly as it is. Change only the wall colour, curtains, rug, cushions, throws and lamps to make this room feel [warm / calm / brighter], on a small budget.

This shows you what's possible without buying furniture, and it's often more than you'd expect. There's more on this in our guide to redesigning a room with AI for free.

3. The declutter

Show this exact room tidied and decluttered: remove loose items, cables, piles and small objects. Keep all the furniture, walls, windows and decor in place. Photorealistic.

Surprisingly useful before you redesign anything. Sometimes the room you want is the room you have, with less on the floor.

4. Time of day

Show this exact room in the evening with the lamps on and warm, low light. Change nothing except the lighting.

Most rooms are designed in daylight and lived in at night. Check both before choosing a paint colour.

Prompts for changing one thing at a time

5. Swap one piece

Change only one thing in this photo: replace the [sofa] with a [deep green velvet three-seat sofa] of the same size, in the same position. Keep everything else exactly the same.

6. Test a wall colour

Change only the wall colour to [a warm greige / a deep olive green]. Keep the furniture, floor, ceiling, windows, lighting and camera angle exactly the same.

7. Try a different floor

Replace only the flooring with [wide-plank light oak / terracotta tiles / polished concrete]. Keep everything else in the image the same.

8. Fix a mistake from the last image

In the last image the window moved. Put the window back exactly where it is in the original photo, the same size. Keep all the new furniture and colours.

Naming the specific mistake, plainly, works far better than regenerating and hoping.

Prompts for planning, before any images

ChatGPT is also a good thinking partner in text, as long as you give it real numbers.

9. Layout ideas from measurements

My living room is 4.2 m by 3.6 m. The door is in the corner of the 3.6 m wall, the window is centred on the opposite wall, and the TV must go on the left wall. Suggest three furniture layouts with approximate sizes for a sofa, a chair, a coffee table and a rug, keeping at least 80 cm walkways. Explain the trade-offs of each.

10. Find your style

Here are six rooms I love. What do they have in common? Name the style or mix of styles, the colour palette with approximate hex codes, the main materials, and three things I should avoid to keep the look consistent.

This is also the first step of building a mood board with AI.

11. Turn a picture into a shopping brief

List every item in this redesigned room: furniture, lighting, textiles and decor, with approximate dimensions, colours and materials, and what to search for when shopping. Flag anything that may not fit a room of [size].

12. Write the brief for a designer or builder

Write a one-page brief for a kitchen designer based on these images and notes: [notes]. Include the look, the must-haves, what we're keeping, budget range, and questions they should answer. Plain language, no jargon.

What should you never trust ChatGPT with in interior design?

  • Exact measurements in images. Renders are not to scale. A sofa can quietly shrink to fit.
  • Real products and prices. It can describe what to look for, not what's in stock.
  • Structure, plumbing, wiring and gas. Anything behind a wall needs a qualified person.
  • Kitchen and bathroom clearances. See our AI kitchen design and AI bathroom design guides for the guidelines renders tend to ignore.

For the full method, see our complete guide to AI interior design.

Using prompts for client work? Our AI for Architects and Interior Designers course gives you prompts you can adapt, the reasons they work, and a method for keeping renders consistent across a whole project.

See the course

Frequently asked questions

Can ChatGPT do interior design?

It can do a lot of it: restyle a room photo, suggest layouts from measurements, extract a palette from images you like and write a brief. It can't measure, check building rules or find real products, so treat its images as ideas and its plans as drafts.

What is the best prompt for interior design?

Name the room, list what must not change, choose one style, add three to five specific materials, and describe the light. For example: keep the walls, windows and camera angle; Japandi style; light oak, linen, a paper lamp; natural daylight; photorealistic.

Can ChatGPT make a floor plan?

It can sketch a rough layout and reason about furniture placement if you give it measurements, but it isn't a drafting tool. For accurate plans, use a floor plan app or CAD, then use AI to visualise the plan in 3D.

Is ChatGPT or Midjourney better for interior design?

For redesigning a photo of your own room, ChatGPT and Gemini are usually better, because they edit an uploaded image and follow instructions about what to keep. Midjourney is strong for mood and inspiration images that don't need to match a real space.

Copy a prompt, swap in your own room and style, and change one thing at a time. That habit alone will get you better results than any secret prompt.

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