How to Measure Your Room for a Sliding Door Wardrobe in 15 Easy Steps

Measuring for a sliding door wardrobe takes about twenty minutes and needs three figures above all others: the wall width at three heights, the floor to ceiling height at three points, and the depth from the wall to the nearest obstruction. Sliding doors are less forgiving than hinged ones because the track has to run true, so the accuracy of these measurements determines whether the doors glide or stick.

Work through the fifteen steps below in order. Write every figure down in millimetres as you go, since mixing units is the most common source of error.

Before you start

You will need a steel tape measure rather than a fabric one, a spirit level, a pencil, and a notepad. A second person helps with wide walls. Clear the wall area first so the tape can sit flat against the skirting and the wall itself.

Step 1: Measure the wall width at floor level

Measure from wall to wall along the floor, above the skirting board if possible. Record the figure in millimetres. Walls in older UK homes are rarely square, so this is only the first of three width readings.

Step 2: Measure the wall width at mid height

Repeat the measurement at roughly 1.2m from the floor. Differences of 10mm to 20mm between readings are normal in older houses and entirely workable, but you need to know about them.

Step 3: Measure the wall width near the ceiling

Take a third reading close to ceiling height. You now have three widths. The smallest one is your working width, because the wardrobe has to pass the tightest point.

Step 4: Measure ceiling height on the left

Measure from the finished floor to the ceiling at the left hand end of the intended run. Measure to the finished floor surface, not the subfloor, and note whether carpet is already fitted.

Step 5: Measure ceiling height in the centre

Take the same reading at the midpoint. Ceilings in older properties often dip in the middle, sometimes by 20mm or more.

Step 6: Measure ceiling height on the right

Complete the set with a reading at the right hand end. The smallest of the three heights is the figure that governs a floor to ceiling installation.

Step 7: Check the floor for level

Place a spirit level on the floor across the width of the run and note any fall. Sloping floors are common and are corrected with adjustable feet or packers, but the track must end up level or the doors will drift open or closed on their own.

Step 8: Check the walls for plumb

Hold the level vertically against each end wall. A wall that leans outwards at the top affects how a tall side panel meets it and may need scribing or a filler strip.

Step 9: Measure the depth available

Measure from the back wall out to the nearest obstruction: the bed, the door swing, or a radiator. For clothes to hang square across the wardrobe you need around 600mm internal depth, plus roughly 100mm for the sliding track and door assembly.

Step 10: Record every obstruction on the wall

Note the position and size of sockets, light switches, radiators, pipe boxing, skirting depth, coving, picture rails and any vents. Measure each one from a fixed reference point such as the left hand wall, not from each other.

Step 11: Check the door swing into the room

Open the bedroom door fully and mark where it stops. A sliding wardrobe cannot obstruct this arc. This is often the constraint that decides how far the wardrobe run can extend.

Step 12: Measure the access route

Sliding door panels arrive as large single pieces and cannot be folded. Measure the front door, hallway width, stair turns and the bedroom doorway. A panel that fits the wall but not the staircase is a real and frequent problem in terraced housing.

Step 13: Allow clearance for installation

Add a tolerance of at least 20mm to 30mm at each side and above the carcass so the unit can be manoeuvred into position and adjusted. A wardrobe cut to the exact wall dimension cannot be installed.

Step 14: Plan the internal layout against your clothes

Count your long hanging garments, your short hanging garments and your folded items before choosing internal configuration. Long hanging needs around 1600mm of drop, short hanging around 1000mm. This determines how the interior divides and how many drawers you need.

Step 15: Write the final specification

Produce a single sheet with your smallest width, smallest height, available depth, obstruction positions, floor level notes and access route dimensions. Take it with you when you compare products, and check it against the listed carcass dimensions rather than the marketing description. Our sliding wardrobes UK sale range lists external and internal figures separately so this comparison is quick.

Common measuring mistakes

Measuring only once is the biggest. UK walls and ceilings are rarely true, and a single reading will eventually catch you out.

Measuring before flooring is fitted is the second. If carpet or timber is going down after the wardrobe, your ceiling height will shrink by the thickness of the floor build up, which can be 15mm to 25mm.

The third is forgetting the skirting board. Most wardrobes sit against the skirting rather than the wall, which pushes the carcass forward by 15mm to 20mm. Either allow for it or remove the skirting behind the run.

The fourth is ignoring radiators. A wardrobe placed over a radiator traps heat, which is bad for the furniture and wasteful. Plan around it or have the radiator moved before ordering.

Sliding versus hinged: a quick check

If the distance between the wardrobe face and the nearest obstruction is under 600mm, hinged doors will not open comfortably and sliding is the right answer. If you have more space than that, hinged doors let you see the whole interior at once, which some people prefer.

Sliding doors also suit wide runs, since one track can span three or four metres neatly. For narrower runs, the mechanism takes up a disproportionate amount of depth.

Choosing the door split

How many panels the run is divided into affects both access and cost. Two panels across a 1.8m opening give wide, generous doors but mean you can only ever see half the interior. Three panels across the same width give narrower doors, more overlap and slightly less visible interior at any one time, though they are lighter and easier to move.

A useful principle is to align the panel joins with what sits behind them. If the interior has three bays, three doors let you open directly onto the bay you need. If the interior is split into two zones, two doors make more sense. Planning the doors and the interior together avoids the frustration of a door that never quite opens onto the section you want.

Panel weight matters on wider doors, particularly if one is mirrored. Glass adds considerable weight, so check that the track and runners are rated for mirrored panels rather than assuming a standard mechanism will cope.

Preparing the room before delivery

A little preparation on delivery day saves a great deal of difficulty. Clear the wall completely, including removing the skirting if the plan requires it, and take up any protective covering that would sit under the track. Have the floor finished and dry, since fitting a track over a floor that is still settling causes alignment problems later.

Check that you have enough clear floor in the room to lay panels flat during assembly, as sliding doors are usually fitted last and need space to be lifted into the track. Assembling a wide run in a room still full of furniture is the most common cause of damaged panels.

Once the wardrobe is sized, the remaining pieces are easier to plan. Slim bedside units often work better alongside a full width sliding run, and the bedside cabinets UK bedrooms are sized for include compact options for tight spaces. You can also compare finishes across the wider bedroom furniture UK collections.

At Furniture in Fashion every wardrobe listing carries full dimensions and assembly details, with free delivery to most UK mainland postcodes. Returns are available up to 30 days.

Frequently asked questions

How much depth does a sliding door wardrobe need?
Allow around 700mm in total: roughly 600mm of internal depth for clothes to hang square, plus about 100mm for the track and door assembly.

Do I measure before or after fitting new flooring?
After, if at all possible. If the wardrobe must be ordered first, subtract the thickness of the planned floor build up from your ceiling height measurement.

What tolerance should I leave at the sides?
At least 20mm to 30mm at each side and above. Without clearance the unit cannot be tilted upright or adjusted into position.

Can a sliding wardrobe go on an uneven floor?
Yes, within reason. Adjustable feet and packers correct modest falls, but the track must finish level or the doors will move on their own.

Why measure the hallway and stairs?
Sliding door panels are large rigid pieces that cannot be folded or angled much. Confirming the access route avoids a delivery that fits the bedroom but not the route to it.