Long Narrow Living Room Layout: Plans in cm

Long, narrow living rooms are everywhere in Britain: the knocked-through front and back rooms of a Victorian terrace, the lounge-diner of a new-build flat, a room stretched by an extension. They feel awkward because the obvious layout, everything lined up along the long walls, turns the middle into a corridor. The fix is to give the room one walkway and two or more zones. This page shows how, with plans drawn to scale in centimetres.

Five rules for a long room

One walkway, down one side. Keep it 75–90 cm wide, and aim for 90 cm, because in a long room it is the main route. It runs from the door to the far end without crossing a zone.
Split the length into zones. Sitting at one end, dining or work at the other. Each zone is a rough square, which is a shape furniture is easy to arrange in.
Turn the sofa. Float it across the room to face the short end wall, or put its back to the walkway. Either way the sofa marks where the sitting zone ends.
Put the TV on a short wall or the chimney breast, not the long wall opposite the sofa, unless the room is at least 3 m wide. The next section shows why.
One rug and one light per zone. Two rugs and two lamps tell the eye where each zone starts and ends. One long rug does the opposite.

What	Size	Where it comes from
Main walkway	75–90 cm (30–36 in)	Emily Henderson; Jackie Barnes Design
Path few people use	45–60 cm (18–24 in)	Emily Henderson
Sofa to coffee table	35–45 cm (14–18 in)	Castlery UK
Sofa depth (most models)	80–100 cm	Furniture Choice
Bare floor from rug to wall	30–45 cm, 20 cm at the least	Livingetc
Behind a dining chair	81 cm with no one passing; 112 cm to walk past	NKBA
Facing seats	About 1.2–2.1 m apart	Hall (1966), one culture, one era
Seat to TV	1.2–1.6 × the screen diagonal	THX and SMPTE figures, via Wikipedia

The full list, with the places where sources disagree, is in our living room clearances guide.

Why the long wall is a trap

Most people start with the sofa against one long wall and the TV against the other. In a long room that often works on paper, but only just. Add up a slice across a 3 m room:

A slice across a 3 m room with the sofa on the long wall. Every centimetre is used.

A 90 cm sofa, a 40 cm gap, a 45 cm coffee table, a 90 cm walkway and a 35 cm TV unit come to exactly 300 cm. Your eyes end up about 2.2 m from the screen, which suits a TV up to about 50 inches by the widely quoted 30° figure. In a room 2.8 m wide, the walkway shrinks to 70 cm, under the designers' range.

The numbers are not the only problem. The walkway runs between you and the screen, the two ends of the room are left over, and the room still reads as a corridor. In a 3.5 m room the long-wall layout has 50 cm to spare, so it is a fair choice there. Under 3.5 m, the plans below usually work better.

Plan 1: the 3 × 6 m room with a dining end

The sofa floats across the room to face the TV on the end wall. The walkway runs the full length, past the end of the sofa, to the dining end.

This is the lounge-diner of many flats and new-build houses. The sofa, 170 cm long, floats across the room 2.35 m from the end wall and faces the TV on that wall. From your eyes the screen is about 2.5 m away. That suits a 55–65 inch TV: a 65-inch screen sits inside the 1.2–1.6 range, and a 55-inch is a little further away than it needs to be, which is fine. The window sits on the long wall, at right angles to the screen, so it does not reflect in it.

A 200 × 290 cm rug runs from the TV unit to the back of the sofa, so the whole sofa and the coffee table stand on it. IKEA gives that as one of its two options: a third of the sofa on the rug, or all of it. The table sits 40 cm from the sofa.

The walkway runs along the bottom wall, 85 cm wide, from the door to the dining end. At the dining end, a 120 × 80 cm table has a bench against the wall, because a bench needs no room to pull out. The chairs face the walkway: the table's edge is 165 cm from that wall, more than the NKBA's 112 cm for walking behind someone who is sitting down.

Something has to give in a 3 m room. The rug leaves only 15 cm of bare floor at the window wall, less than the 20 cm we usually aim for, and the walkway is 85 cm, not 90. We split the difference between the two, because both matter every day. If you choose a 160 × 230 cm rug instead, our small living room layouts show that version, in a 5.4 × 3 m room.

Plan 2: the 3.5 × 7 m through-lounge

A through-lounge with two chimney breasts. The walkway runs along the hall wall from the front to the garden doors, behind the sofa and past the dining chairs.

This is the classic knock-through in a Victorian or Edwardian terrace: the front room and the back room made into one, with a chimney breast from each on the party wall. The hall door is near the front, so the walkway runs the full length of the hall wall, 90 cm wide, from the door to the garden doors. It never crosses the sitting or the dining zone.

The 200 cm sofa faces the front chimney breast with its back to the walkway. The coffee table sits 40 cm in front of it, and a 230 × 160 cm rug takes the sofa's front legs. With the fireplace out of use, the TV hangs on the chimney breast at eye height, about 1.6 m from your eyes. That suits a 43–50 inch screen. The front window is on the side, so the screen does not reflect it.

The dining table, 140 × 80 cm, sits in front of the rear chimney breast, 80 cm from it, which is about the NKBA's 81 cm for a chair with no one passing behind. On the walkway side there is 155 cm to the wall, so people walk behind the chairs without asking anyone to stand. A sideboard fills the rear alcove, shelves fill the front one, and about 1.7 m of open floor separates the two zones.

Want a bigger TV? Across a 3.5 m room, the width is the limit. A sofa 85 cm deep instead of 90 cm, and a walkway of 75 cm instead of 90 cm, together add 20 cm. That takes you to about 1.8 m, enough for a 55-inch screen by THX's figure. If the fireplace still works, the TV moves to an alcove instead: see Plan 2 of our living room layout with a TV.

Other ways to split the length

Two sofas facing each other, across the length. Put each one across the room, so the walkway still runs past their ends. Set them 1.2–2.1 m apart, the "social distance" Edward Hall observed in the 1960s, and put the coffee table between them. It suits a room that is more for talking than for TV.
A reading or work corner. A chair and a lamp by the window at the far end, or a desk under it, makes a small third zone without walls.
A narrow console behind the sofa. A table about 30 cm deep behind a floating sofa gives a place for a lamp and marks the edge of the sitting zone. Check the walkway first: it takes 30 cm from the floor behind.
A corner sofa as a divider. The short arm of an L-shaped sofa can mark the end of the sitting zone. Measure carefully: a corner sofa is often 85–100 cm deep on both arms, and the arm that faces the walkway can block it.

Radiators often sit on the long walls of these rooms. Keep a sofa at least 20 cm from a radiator, as Copenhagen's heat utility HOFOR advises.

Light and rugs in a long room

A single ceiling light in the middle of a long room lights the corridor and leaves both zones dim. Give each zone a lamp of its own: a floor lamp behind the sofa, and a pendant or a table lamp at the dining end. Our guide to warm white and cool white bulbs covers which colour of light suits each one.

The same goes for rugs. One rug per zone works better than one long runner down the middle, and each rug should catch the front legs of the seats in its zone. The rug size calculator works out the size from your sofa and your room.

Four mistakes in long rooms

Everything on the walls. Furniture lined up on both long walls leaves an empty middle and a corridor feel. Pull at least the sofa out.
Two walkways. If people can walk down both sides, neither zone has a back. Choose one side and furnish the other.
A rug that crosses the route. Size and turn each rug so its edge stops short of the walkway.
A sofa that is too long. A floating sofa across a 3 m room should leave the walkway clear: 300 − 90 cm leaves about 210 cm, so a sofa of 170–200 cm. Check it fits through the door with the sofa fit calculator.

See your long room before you move a thing

Long rooms are hard to judge from a plan, because the trouble is in the centimetres: the walkway at the end of the sofa, the chair behind the dining table, the distance to the TV.

Snuug, the iPhone room app, shows you those centimetres in your own room. Walk once round it with your iPhone, and Snuug rebuilds it in 3D, to within about 3% of its real size in our tests of ten homes. Float the sofa across the room, move it in 5 cm steps and watch the walkway as you go. Paste a shop link and see a new dining table in place before you buy it. Our team checks every room by hand, and your first room is free.

Questions

How do you arrange furniture in a long, narrow living room?

Give the room one walkway, 75–90 cm wide, down one long side. Then split the rest of the length into two zones, for example a sitting area facing the TV or fireplace and a dining or work area at the other end. Each zone gets its own rug and its own light.

Where should the sofa go in a long, narrow living room?

Usually across the room, facing a TV or fireplace on the short end wall, with the walkway past one end of the sofa. In a through-lounge with a chimney breast on the long wall, the sofa can face the chimney breast with its back to the walkway instead.

Should the sofa go against the long wall?

It can, if the room is at least 3 m wide. A 90 cm sofa, a 40 cm gap, a 45 cm coffee table, a 90 cm walkway and a 35 cm TV unit add up to exactly 300 cm. Under 3 m, something has to shrink: hang the TV on the wall, or choose a shallower sofa.

How do you zone a through-lounge?

Put the sitting zone at one end and the dining zone at the other, with the walkway along the side that has the door. Turn the back of the sofa to the dining zone or to the walkway, give each zone its own rug and light, and leave at least 80 cm between a dining table and the wall behind its chairs.

What size rug for a long, narrow living room?

One rug per zone, not one long rug. In a 3 m wide room, a 200 × 290 cm rug laid along the room can take the whole sofa and the coffee table. In a 3.5 m room, a 160 × 230 cm rug under the front legs of a 200 cm sofa leaves room for the walkway.

How wide should the walkway be in a long living room?

Designers use 75–90 cm (30–36 in), and about 90 cm for the main route. In a long room the walkway is the main route, so aim for 90 cm and accept 75–85 cm only at one short pinch point, such as the end of the sofa.

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.