How to make a room look bigger: 10 moves, with plans

You cannot add floor area. You can change how much of it you see, and how much the eye has to stop on. This guide gives ten moves that make a room look bigger, cheapest first, with the numbers designers use and an honest note on how much each one does. Two plans show the same small living room before and after.

What makes a room look big: the honest version

A few lab studies have tested this, and they agree on one uncomfortable point: the size of the floor matters most. Everything else is a nudge. That still leaves plenty to do, because the nudges add up.

The practical reading: keep the floor you have visible and clear, keep tall things away from the main view, and light the room well, at the edges. Paint comes last.

The 10 moves, cheapest first

A small living room, before and after

This is a 3 × 3.6 m living room, about 11 m², with the door in the corner and the radiator under the window. The furniture is the same in both plans, except for one pouffe.

In the first plan the room looks full before you are through the door. The eye lands on a tall bookcase, the rug cuts the floor into a small island, and the pouffe sits in the way in. In the second, the bookcase moved to the door wall, where you see it side-on as you walk in. The view from the door now runs 4 m across the room to a lamp in the far corner. The sofa is on legs, the 160 × 230 cm rug reaches under its front legs, a mirror beside the window catches the daylight, and the walkway from the door is 95 cm wide.

1. Clear the view from the door

The first view of a room is from the door, and it is usually the longest line in the room: the diagonal to the far corner. In the plans above that line is about 4 m, against a 3 m wall. Whatever sits on it sets your sense of the room's size.

Stand in the doorway and look. If the line ends at a tall wardrobe, a bookcase or a stack of boxes, the room stops there. Move the tall piece to the wall the door is on, or beside the door, where you meet it side-on. Leave the far corner open, or put something low or lit there: a lamp, a plant or a chair. In Stamps's lab experiments, places with lower surrounding edges felt more spacious, which points the same way.

2. Clear the walkway

A room you have to edge through feels smaller than it is. A rule designers use: keep the main route 75–90 cm wide (30–36 in), and about 90 cm from the door. In a tight room they accept 45–60 cm for a path few people use, such as the gap behind a chair. Measure at the narrowest point: a sofa arm, a plant or a radiator often takes the last 10 cm.

Keep the door's swing clear too. A door that opens only halfway makes a room feel cramped before you are inside. Our living room clearances guide has every other gap in cm.

3 and 4. Fewer pieces, and the tall ones out of sight

In a virtual-reality study by Bokharaei and Nasar, rooms with less furniture looked more spacious. Another study found furniture mattered in model rooms and not in virtual ones, so the evidence is mixed. Designers are not mixed about it, though: take out the smallest, least-used piece first. A side table nobody uses, a second pouffe or a plant stand can go, and the floor it frees is the floor you see.

Fewer, bigger pieces usually beat many small ones. One 200 cm sofa looks calmer than a two-seater, an armchair and a pouffe that fill the same space.

5. Light the corners, not just the middle

A single ceiling light leaves the corners dark, and a dark corner reads as a wall closing in. In Belinda Collins's 1993 review of older lighting experiments, mostly in offices, lighting on the walls and at the edges of a room went with a more spacious impression. In Bokharaei and Nasar's virtual rooms, brighter rooms looked more spacious.

So put a lamp in the far corner, the one you see from the door, and another on the opposite side. If the lamp washes the wall with light, even better. Our guide to making a room cosy has the full lamp plan, and the warm white vs cool white guide explains the bulbs.

6. Put the mirror where a window would be

A mirror works when it gives the eye somewhere to go. The design channel Five By Nine suggests hanging one beside a window, so it doubles the daylight and the view, or directly opposite one, as long as it reflects something worth seeing. A mirror that reflects a cluttered corner or the back of the TV doubles that instead.

• Beside the window, on the side wall at right angles to it, catches daylight without glare.
• Opposite the window brings in the view, but check it at midday for glare.
• Lean, don't hang, if you rent: a tall mirror leaning on the floor needs no hole. If children or pets live with you, fix it to the wall, so ask your landlord first.

We found no study that measured mirrors in real homes. This is a designers' rule, and a sensible one.

7. Furniture on legs, and lower

When you can see the floor running under the sofa, the floor looks bigger. Five By Nine suggests slim furniture on visible legs, so the eye travels across the floor. A sofa with a skirt to the ground, a solid bed base or a chunky TV unit cuts the floor off at its edge.

Height matters as well as legs. Low pieces keep the walls clear above them: a low sideboard instead of a tall cabinet, a sofa with a low back, a TV unit instead of a wall of shelves. If you need tall storage, put it on the door wall (move 4).

8. A rug big enough to hold the room

A small rug is the most common mistake in a small room, and the cheapest to make. Floating in the middle, it cuts the floor into a small island and a ring of bare boards. A rule designers use: the front legs of the sofa and the chairs rest on the rug, it runs 15–20 cm past each end of the sofa, and there are 30–45 cm of bare floor between the rug and the walls.

For a 200 cm sofa that means a rug about 230 cm long: in UK stock sizes, 160 × 230 cm. In the plans above it is the single biggest change. Our rug size calculator picks the size for your own sofa and room.

9. Curtains high, wide and to the floor

Curtains that stop at the frame frame the window's real size. Hung higher and wider, they borrow wall and make the window, and the wall, look taller.

• Height. Dunelm says to fit the pole at least 15 cm above the window. Designer Lisa Staton, in Livingetc, splits the difference between the top of the window and the ceiling. With a 240 cm ceiling and a window top at 210 cm, both give 225 cm.
• Width. Run the pole far enough past the frame that the open curtains stack beside the glass, not over it, as House & Garden advises. You keep all the daylight, and the window looks wider.
• Length. Let them hang to the floor: Dunelm uses about 1.25 cm off it. If the radiator is under the window, keep the fabric clear of it.

A new pole needs holes, so ask your landlord first if you rent. Swapping short curtains for longer ones on the existing pole is renter-safe.

10. Paint: light, and the ceiling lightest

Light paint helps, a little. In von Castell, Hecht and Oberfeld's 2018 study, bright side walls made a virtual room 450 cm wide look 7.88 cm wider than dark ones: under 2%. A second study by the same team found brighter ceilings looked higher, whatever their colour. The authors suggest painting walls and ceiling in the brightest colour you like if size is your aim.

That is real, but it is smaller than most advice suggests, and it comes after the free moves. If you rent and cannot paint, you lose little. If you have magnolia walls, our guide to living with magnolia walls shows how to make them work.

How to make a small living room look bigger

Living rooms collect the most furniture, so they gain the most from these moves. In order:

1. Put the sofa on the longest unbroken wall, facing the window, TV or fireplace, with a 10–20 cm gap behind it if you can spare it. In a long room, float it across the room instead. Our eight small living room plans show both, to scale.
2. Size the coffee table down, not out. Half to two thirds of the sofa's length, 35–45 cm from the seat. A round or oval table is easier to walk past.
3. Choose a TV unit lower than the window sill, or a slim one. A wall mount frees the floor, but it needs holes, so ask first if you rent.
4. Keep the walkway at the edge, not through the middle of the seats.
5. Light the far corner and the wall behind the TV.

Five mistakes that shrink a room

• A tall piece facing the door. The first thing you see sets the size of the room.
• A rug that floats. Size up until the front legs rest on it.
• Lots of small pieces. Each one is something for the eye to stop on. One bigger piece is calmer.
• Curtains at the frame. They show the window at its real size. Raise them.
• One light in the middle. Dark corners pull the walls in. Light them.

See your room bigger before you move a thing

Every move on this page is easier to judge in your own room than in a plan: you need to see the view from your own door, and know whether the 160 × 230 cm rug leaves the walkway clear.

Snuug, the iPhone room app, lets you try it all first. You walk once round your room, and Snuug rebuilds it in 3D to within about 3% of its real size in our tests of ten homes. Move the bookcase to the door wall and look again from the door. Move the sofa in 5 cm steps and watch the walkway. Try the bigger rug, paint the walls a lighter colour before you buy a tin, and paste a shop link to see a sofa on legs in your room. Members get a Room Analysis that says what to change, with a plan that starts with the free moves. Our team checks every room by hand, and your first room is free.

Questions

Do mirrors make a room look bigger?

Designers say yes, when the mirror hangs beside or opposite a window and reflects something worth seeing: daylight, a view or the far side of the room. A mirror that reflects a cluttered corner doubles the clutter. We found no study that measured mirrors in real homes, so treat this as a designers' rule.

What colour makes a room look bigger?

Light colours, on the walls and especially the ceiling. In one virtual-reality study, bright side walls made a 4.5 m wide room look about 8 cm wider than dark ones, under 2%. In another set of lab experiments, colour made little difference to how spacious a place felt once the amount of light was held equal. So paint helps a little, and light helps more.

Does a big rug make a room look bigger?

Usually, yes. A rug big enough for the front legs of the sofa and chairs reads as one floor. A small rug floating in the middle cuts the floor into pieces and makes the furniture look as if it is drifting. For a 200 cm sofa that means about 160 × 230 cm.

Should furniture be against the wall in a small room?

Often, yes, because the wall is the only place that leaves a 75–90 cm walkway. But a gap of 10–20 cm behind the sofa still helps, and in a long or open-plan room, a sofa pulled away from the wall can make a sitting zone with the route behind it.

Do dark walls make a room look smaller?

A little. In the same virtual-reality study, dark side walls looked a few centimetres closer than bright ones. The effect is small next to floor area, light and clutter, so a dark colour you love is not a disaster in a small room.

How do I make a small room look bigger without painting?

Clear the view from the door, take out one piece of furniture, move tall pieces to the door wall, swap to furniture on legs, size up the rug, hang a mirror beside the window, raise the curtains and light the corners with lamps. All of it is renter-safe, apart from new curtain poles, which need the landlord's agreement.

Editorial notes

Written by the Snuug team and checked on 1 November 2026. A number with no source beside it is a designers' rule of thumb, not a study.

1. Stamps, A. E. (2010), Effects of area, height, elongation, and color on perceived spaciousness, Environment and Behavior (66 people, 46 settings; abstract read via our knowledge base)
2. von Castell, C., Hecht, H. and Oberfeld, D. (5 Sep 2018), Bright paint makes interior-space surfaces appear farther away, PLOS ONE 13(9):e0201976 (read 31 Oct 2026)
3. von Castell, C., Hecht, H. and Oberfeld, D. (2018), Which attribute of ceiling color influences perceived room height?, Human Factors 60(8):1228–1240 (abstract from search summaries)
4. Bokharaei, S. and Nasar, J. L. (2016), Perceived spaciousness and preference in sequential experience, Human Factors (about 30 students, virtual rooms; abstract read via our knowledge base)
5. von Castell, C. and others (2014), The effect of furnishing on perceived spatial dimensions and spaciousness of interior space, PLOS ONE (abstract read via our knowledge base)
6. Collins, B. L. (February 1993), Evaluation of subjective response to lighting distributions: a literature review, NISTIR 5119, National Institute of Standards and Technology (read 31 Oct 2026)
7. Five By Nine (YouTube), 5 things small homes should ALWAYS have to feel twice as big (mirrors beside a window; slim furniture on visible legs). Summarised in our knowledge base; title checked 31 Oct 2026
8. Five By Nine (YouTube), The 15 rules of interior design in 15 minutes (a mirror opposite a window, reflecting something worth seeing). Summarised in our knowledge base; title checked 31 Oct 2026
9. Livingetc (Metcalf, 7 Jul 2022), How high to hang a curtain rod (Lisa Staton: split the difference between the top of the window and the ceiling)
10. Dunelm (10 Nov 2018), How to put up a curtain pole (at least 15 cm above the window; curtains about 1.25 cm off the floor)
11. House & Garden, How to measure curtains (let open curtains stack beyond the glass). Summarised in our knowledge base; the site refused our fetch
12. Emily Henderson, Living room rules to know (walkways 30–36 in; 18–24 in in a tight room). The page refused our fetch; figures from search summaries, checked 15 Oct 2026
13. Jackie Barnes Design (21 Jan 2026), Key measurements every homeowner should know when designing a living room (about 90 cm main route)
14. Livingetc (Wolfe, 22 Aug 2025), The two-thirds rule (front legs on the rug; 30–45 cm of bare floor to the walls)
15. IKEA UK, How to choose the right rug size (checked 31 Oct 2026)
16. Castlery UK (5 Aug 2026), Coffee table dimensions (35–45 cm from the sofa)