Your new sofa will fit if two things are true: its diagonal depth is smaller than the narrowest opening along the delivery route, and it can make every turn between the front door and the living room. Width alone rarely decides it. Most sofas are carried on their back or tipped on end, so what matters is how the depth, height and diagonal measurement compare with your doorways, hallway, staircase and landing.
That is why we always suggest measuring the route before you measure the room. Whether you are browsing our modern sofas UK for a compact two seater or a large corner design, a few careful minutes with a tape measure will tell you far more than any guesswork on the day. Here is how to do it properly.
You only need a metal tape measure, a notepad or phone, and a second person to hold the other end. Write each measurement down in centimetres as you go, and note where it was taken. Measure every opening at its tightest point, not its widest. Door frames, skirting, handles, radiators and light switches all steal space, and a hallway that looks generous at one end can pinch to a much narrower gap halfway along.
It helps to have the dimensions of the sofa you are considering to hand as well. Every product page should list width, depth and height. The figure you will also want is the diagonal depth, which we explain below.
The same route will need to take other large pieces in future, so it is worth keeping your notes. If you are planning a wider refresh of the room, our range of modern living room furniture UK lists full dimensions for sideboards, units and chairs, and the measurements you take now will apply to all of them.
Width runs from arm to arm. Depth runs from the front of the seat cushion to the back of the frame. Height runs from the floor to the highest point of the back. These three numbers describe the box the sofa occupies in your room, but they do not tell you whether it will pass through a door.
Diagonal depth is the measurement that usually decides whether a sofa will go through a doorway. To find it on a sofa you can access, place a straight edge from the top of the backrest to the front tip of the arm, so it forms a triangle with the side of the sofa. Then measure from the inside corner, where the seat meets the back, straight out to that straight edge. That distance is the diagonal depth.
When a sofa is tilted back through a doorway, this is the smallest profile it can present. If the diagonal depth is less than the width of the door opening, the sofa can usually be angled through. If you cannot measure the sofa yourself, check the specification or ask our team before ordering.
Start outside. Look at the path from where a van can park to your front door. Garden gates, side passages, porches and steps all count. In many UK terraced streets the front garden is small and the gate is narrow, so measure the gate opening and check whether it can be lifted off its hinges if needed. If there are steps, note how many and whether there is a handrail that might get in the way.
For flats, measure the communal entrance door, the lobby and any internal doors leading to the lift or stairs. Check the internal dimensions of the lift, including the diagonal from the floor at the back to the top of the door frame, since a sofa may need to stand on end inside it.
Measure the width of each door opening with the door fully open. Take the measurement from the door stop on one side to the door itself on the other, because the thickness of an open door eats into the gap. If the door can be removed from its hinges, measure the frame without it as well. That extra few centimetres is often the difference between success and a sofa left on the doorstep.
Next, measure the height of each opening. Then look at what lies immediately beyond it. A door that opens straight onto a wall, a radiator or the bottom stair creates a tight turn, and turns are where most deliveries come unstuck. Measure the distance from the door frame to the nearest obstacle in front of it. This is the space available to swing the sofa round.
Hallways in older UK houses are frequently narrow, especially in Victorian and Edwardian terraces where the hall runs alongside the front room. Measure the width at several points, and note the narrowest. Include anything fixed to the wall: radiators, coat hooks, shelves and the bottom newel post of the staircase. Hall widths vary a great deal between property types, so never assume yours is standard.
Then measure the ceiling height in the hall, and look up. Pendant lights and smoke alarms are easy to forget and can catch a sofa that is being carried on end. If the hallway leads into the living room through a doorway on the side rather than at the end, measure the length of the hall beyond that door too, because the sofa may need to travel past it before turning back.
If the sofa is going upstairs, perhaps to a first floor living room, a loft room or a flat above a shop, the staircase needs the most careful attention. Measure the width of the stairs between the wall and the banister or handrail. Then measure the headroom: stand on a step partway up and measure from the edge of the step vertically to the ceiling or the underside of the floor above. The lowest point is usually where the stairs pass beneath the landing.
Staircases with a turn, a half landing or winder steps need extra thought. Measure the width and length of the landing, and the height available at the turning point. A sofa that fits the straight flight may not be able to pivot at the top. Sketch a rough plan from above if it helps, marking the measurements as you go.
Only once the route checks out is it worth confirming the room. Measure the wall where the sofa will sit, and leave space at either end for walking past, opening doors and reaching sockets. Allow room in front for a coffee table and legroom. Check that the sofa will not cover a radiator entirely, as that blocks heat and dries out upholstery over time.
If your measurements are tight, the design of the sofa matters as much as its size. A few features make a real difference.
A compact design is often easier to manage on a tight route. Our range of 3 seater fabric sofas UK includes a variety of depths and back heights, so you can compare profiles side by side. Larger homes with awkward access often do better with sectional designs, and many modern corner sofas UK sale arrive as separate units that join together in the room. For a sense of how typical hall widths compare across homes, our article on average UK hallway sizes by property type is a useful reference, and our guide to buying a corner sofa set online in the UK covers sizing, configuration and fabrics in more depth.
Once everything is written down, compare each sofa dimension with the tightest point on the route. The diagonal depth should be less than the narrowest door opening. The sofa height, without feet, should be less than the narrowest hallway width if it will be carried on its side. On stairs, the length of the sofa needs to clear the headroom at the turn. If any measurement is within a couple of centimetres, treat it as a warning rather than a pass, as carpets, door stops and slight angles rarely work in your favour.
If you are unsure, send the measurements to our team along with the sofa you have in mind. We are happy to talk through whether it is likely to fit and which alternatives may suit your home better. You can browse our full range at Furniture in Fashion, with free delivery to most UK mainland postcodes.
The diagonal depth of the sofa compared with the width of the door opening. If the diagonal depth is smaller, the sofa can usually be tilted back and angled through.
If the measurements are close, removing a door from its hinges can add useful width. Do this before the delivery arrives and keep the screws somewhere safe.
Often, yes, but it depends on the width and headroom at the turn. Measure the landing carefully and consider a modular or sectional sofa if space is limited.
The listed width, depth and height are a good start. Check whether the diagonal depth is also given, and ask if feet or backs can be removed, as those details matter most for access.
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