How to Measure for a Corner Sofa — The Complete UK Guide

You've spotted the perfect corner sofa. The style is right, the fabric is right, the price is right. But before you click "add to basket", there's one thing that can turn your ideal purchase into a very expensive headache: measuring incorrectly.

Corner sofas are the most common furniture item returned or refused on delivery in the UK — and in almost every case, the problem comes down to measurements that weren't taken, weren't taken correctly, or weren't compared against the sofa's actual dimensions. This guide fixes that. Work through it step by step and you'll order with complete confidence.

How to measure for a corner sofa: Measure both walls the sofa will sit against. Compare against the sofa's overall width and depth. Leave at least 80cm of clear walkway at the open end of the chaise and in front of the main section. Measure every doorway, hallway and staircase the delivery sections must pass through. Confirm left or right hand orientation before ordering.

First — Understand How Corner Sofa Dimensions Are Listed

Before you measure your room, you need to know how to read a corner sofa's specification — because manufacturer listings can be confusing, and misreading them is responsible for more ill-fitting sofas than any measuring error.

How to read a corner sofa specification

Corner sofas are listed with two main measurements: overall width × overall depth.

• Overall width — The longest measurement. This is usually the main sofa section (the one with the most seats). This is the measurement you compare against your longest available wall.
• Overall depth — The shorter measurement. This is typically the chaise section — how far it extends along the second wall. Compare this against your second available wall, then add 80cm for walkway clearance.
• Seat depth — A separate figure. This tells you how deep the actual sitting area is, not the full sofa. A 100cm overall depth sofa may have a 60cm seat depth — the remaining 40cm is the backrest.

Example: A sofa listed as 265cm × 185cm means the main section is 265cm wide and the chaise is 185cm deep. Your wall for the main section needs to be at least 285cm (265cm + 20cm clearance). Your chaise wall needs to be at least 265cm (185cm + 80cm walkway).

Watch out: Some listings show depth as the full sofa body depth (front to back), not the chaise arm-to-arm length. If a measurement looks unexpectedly small (e.g. 95cm "depth"), it is likely the seat or body depth — not the chaise length. If anything is unclear, call us on 02476 705 600 and we'll clarify before you order.

The 5 Measurements to Take

1. Main sofa wall length

Measure the wall the main sofa section will sit against — from the corner of the room (or the edge of any skirting board) to the nearest interruption: a door frame, window recess, chimney breast or alcove. Your wall measurement needs to be at least 20cm longer than the sofa's overall width to allow clearance at each end. Less than this and the sofa will feel cramped against adjacent walls, and may block a door from opening fully.

2. Chaise wall length

Measure the wall the chaise (L-section) will run along — again from the corner outward to the nearest interruption. The chaise on most standard corner sofas is 155–200cm long. Critically, add at least 80cm of clear floor space beyond the chaise end. This is the walkway clearance needed to move comfortably around the sofa without it feeling like you're squeezing past it every time you enter the room.

3. Room depth — in front of the sofa

Stand at the wall behind where the main sofa section will sit and measure across the room to whatever is opposite — the opposite wall, a TV unit, a dining table or other furniture. You need at least 80–100cm of clear space in front of the sofa for comfortable seated use. Less than this and the room will feel tight; less than 60cm and it becomes difficult to walk past a seated person.

Repeat this from the chaise wall: measure from the sofa back to whatever lies opposite the chaise section. 80cm is the workable minimum here too.

4. Check the corner of the room

Corner sofas are designed for a clean 90-degree right-angle corner. Walk to the corner and look carefully for anything that might prevent the sofa sitting flush: a skirting board that projects further than usual, a radiator pipe, an electricity socket, or a chimney breast that creates an irregular corner shape. Also check whether skirting boards are taller than average — most sofas sit above standard skirting, but thicker or taller profiles can occasionally cause a poor fit at floor level.

5. Measure all access routes

Corner sofas are delivered in sections and assembled in your room — no single piece is the full width of the finished sofa. However, each section still needs to navigate: your front door, the hallway, any internal doors, and any staircase or landing turns. Measure the clear width (not frame width — clear width from door stop to stop) at the narrowest point of each access route.

Standard UK front doors are 76–80cm. Standard internal doors are 76cm. Most corner sofa sections are designed to fit these dimensions, but if you have a Victorian property with a narrow hallway, or a flat with a tight staircase turn, call us before ordering — we can confirm the specific section dimensions for your chosen sofa.

Corner Sofa Measurement Reference Table

Measurement	What to check	Minimum clearance
Main wall length	Sofa overall width + 20cm	20cm spare beyond each sofa end
Chaise wall length	Chaise depth + 80cm walkway	80cm clear floor beyond chaise end
Room depth (main side)	Back of sofa to opposite wall or furniture	80–100cm clear in front of sofa
Room depth (chaise side)	Chaise back to opposite wall or furniture	80cm minimum
Front door width	Clear width at narrowest point	76cm+ (UK standard)
Hallway width	Narrowest clear point along route	80cm minimum for manoeuvring
Internal door width	Door to the target room	76cm+ (UK standard internal)
Staircase / landing	Width and any tight turns	Call us to confirm section sizes

Room Size Guide by Sofa Type

Compact Corner Sofa

Main wall: 220–250cm
Chaise wall: 150–170cm
Min room: 300cm × 280cm

Standard Corner Sofa

Main wall: 260–290cm
Chaise wall: 185–210cm
Min room: 350cm × 300cm

Large Corner / U-Shape

Main wall: 300cm+
Chaise wall: 230cm+
Min room: 400cm × 360cm+

These are minimum working dimensions — rooms this size will fit the sofa but feel well-furnished. For a genuinely spacious feel, add 30–40cm to each measurement. Open-plan rooms have more flexibility since there are no walls on two sides of the sofa.

Left Hand or Right Hand? Getting the Orientation Right

This is the second most common mistake corner sofa buyers make — and unlike a room that's slightly too small, ordering the wrong orientation means the sofa genuinely doesn't work in the room at all. The good news is it's easy to get right once you understand the convention.

Corner sofa orientation is always described as you face the sofa from the front — as if you were looking at it in a showroom.

• Right hand facing (RHF) — Standing in front of the sofa, facing it, the chaise extends to your right.
• Left hand facing (LHF) — Standing in front of the sofa, facing it, the chaise extends to your left.

To determine which you need: stand at the corner of the room where the sofa's corner will sit, facing into the room (as if you were sitting on the sofa). The chaise should run along the wall to your left — choose LHF. The chaise runs along the wall to your right — choose RHF.

Quick check: Take a photo of your room corner with you standing at the corner point, facing into the room. Look at the photo — which wall is on the left of your photo? The chaise runs along that wall if it's LHF, the right wall if RHF. Photos make this much easier to visualise than sketches.

The 5 Most Common Corner Sofa Measuring Mistakes

These are the errors we see most often — and every one of them is avoidable.

Mistake 1: Measuring the wall, not the available space.
You have a 350cm wall, but there's a radiator 40cm from the corner that the sofa can't overlap. The usable space is 310cm — not 350cm. Always measure to the nearest actual obstacle, not the end of the wall.

Mistake 2: Forgetting the walkway clearance at the chaise end.
Buyers measure the chaise against the wall length and confirm it fits — but don't add the 80cm needed beyond the chaise for circulation. The sofa fits, but the room becomes a dead end.

Mistake 3: Confusing overall depth with seat depth.
A sofa listed with a 95cm depth sounds compact. But this may be the seat depth, not the chaise length. Read the specification carefully — if in doubt, call us.

Mistake 4: Not measuring access routes.
The sofa fits the room perfectly — but the hallway is 68cm wide and a section can't get through. Always measure access before ordering, not on delivery day.

Mistake 5: Ordering the wrong orientation.
RHF when you needed LHF. The room, the layout, everything works — except the chaise is pointing the wrong way. Use the photo method above to double-check before confirming your order.

The Tape Test — Visualise Before You Buy

Dimensions on paper are abstract. A footprint on your floor is real. Before confirming any corner sofa order, spend five minutes doing this:

1. Use masking tape or newspaper to mark the full footprint of the sofa on your floor — both the main section and the chaise, at the actual dimensions listed.
2. Mark the sofa back along both walls and the front edge in the room.
3. Walk around the tape outline as if the sofa were there. Walk into the room past the chaise end. Sit on the floor where the sofa will be and look at the room.
4. Check: Does it feel cramped? Is the walkway past the chaise end comfortable? Does it block natural pathways through the room?

This takes ten minutes and can save you a sofa return. Almost every buyer who does this says the sofa either feels larger or smaller than they expected from the numbers alone — and it frequently prompts a confident upsizing or a sensible reduction before ordering.

Corner Sofas in Awkward or Open-Plan Rooms

What if my room doesn't have a traditional corner?

Corner sofas work best in rooms with a clean 90-degree corner. If your room has a bay window, chimney breast, or irregular walls, measure the nearest clean right-angle corner you have available. If no clean corner exists, a large chaise sofa (a standard sofa with an extended chaise end) is often a better fit for unconventional room shapes.

Corner sofas in open-plan kitchens and living spaces

Open-plan rooms are actually ideal for corner sofas. The L-shape naturally defines a seating zone within a larger open space — and because you're not constrained by walls on all sides, you have more flexibility with sizing. Place a large rug under the sofa to anchor the seating area visually, and ensure there's still a comfortable 80–100cm between the sofa front and any adjacent furniture such as a coffee table or kitchen island.

What about floating a corner sofa away from the wall?

It is possible to float a corner sofa in the middle of a large room — particularly in open-plan spaces — but you need significantly more floor area to make it work. The sofa back will be visible from all angles, so choose a model with a finished or upholstered back panel, and allow at least 60–80cm of walkway space behind both sections.

Your Corner Sofa Measuring Checklist

Before you order, confirm all of the following:

• ✅ Measured the main wall — from corner to nearest obstacle, not end of wall
• ✅ Measured the chaise wall — from corner to nearest obstacle
• ✅ Added 80cm walkway clearance beyond the chaise end
• ✅ Confirmed 80–100cm of clear space in front of the main sofa section
• ✅ Checked the room corner for skirting boards, radiators, sockets or pipes
• ✅ Measured the front door, hallway, all internal doors and any staircase turns
• ✅ Confirmed left hand or right hand orientation using the photo method
• ✅ Done the tape test on the floor to visualise the footprint
• ✅ Read the sofa specification and confirmed which number is overall width vs chaise depth

Browse Corner Sofas at Furniture Instore

Once your measurements are confirmed, browse our full range online — or call us on 02476 705 600 and our team will help you find the right size and configuration for your room.

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