An oak wardrobe is a long-term purchase. It will outlast the carpet, the curtains and probably the boiler, so it is worth spending twenty minutes with a tape measure before you commit. Almost every disappointment comes down to millimetres rather than metres: a cornice that clips the top of the cabinet, a wardrobe that sits 30mm proud because nobody measured from the plaster rather than from the front of the skirting, or a delivery that stops dead at the turn of the stairs.

None of it is difficult to avoid. You just need to measure the right things, in the right places, and write them down.

Measure the alcove in three places, then trust the smallest number

Very few walls are straight, and old houses are worse than new ones. Plaster bulges, chimney breasts step out, and corners are rarely a true 90 degrees. So take the width of your space at the bottom, at waist height and near the top. Take the depth at the same three points. Then order to the smallest figure you found, not the average.

If an alcove is 1,200mm wide at the skirting but 1,185mm at shoulder height, your wardrobe needs to be 1,185mm or less. Add a small fitting allowance on top of that — most fitters like 10mm to 20mm of breathing room, because you will never slide a heavy carcass into a gap with zero clearance.

Check for square corners

Push a try square, or even the corner of a cereal box, into each back corner. If the walls splay outwards, the front of a rectangular wardrobe will show a widening gap. If they taper inwards, the frame will foul the wall before the back is anywhere near it. That is the point at which made-to-measure starts to make more sense than a standard size.

Skirting boards, cornices and anything else in the way

This is the most common error of all. A wardrobe measured wall-to-wall may fit perfectly in theory and still refuse to sit back against the plaster, because skirting boards are standing in the way.

Skirting is often 100mm to 150mm tall and 15mm or so proud of the wall, which is depth you lose across the full width of the base. Measure depth from the bare plaster, then record the skirting height and projection separately so you can discuss it with the maker. Many oak wardrobes have a recessed or removable back panel for exactly this reason, and side panels can often be scribed to follow the wall.

The same applies at the top. Coving and cornice can project 75mm to 100mm or more into a room, so a wardrobe designed to reach the ceiling may need to be set forward — or ordered slightly shorter. Check for picture rails, dado rails, radiator pipes, gas pipes, sockets and light switches, and note the height and depth of each one.

Ceiling height and the tipping-up problem

If your ceiling is 2,400mm and the wardrobe is 2,200mm tall, you might reasonably assume it will go in. It will — but getting it upright is a separate question.

To tilt a rigid wardrobe onto its feet, you need clearance for the diagonal across its side panel. That is roughly the square root of (height squared plus depth squared). For a 2,200mm tall, 600mm deep wardrobe, that works out at about 2,280mm. Add a little for your hands, a ceiling rose or a pendant light fitting, and the margin disappears quickly. Measure the ceiling directly above the spot the wardrobe will occupy, at both ends of the space, and take the lower figure.

Sloped ceilings and dormer rooms

In a loft or a period cottage, height changes across the room. Measure at the back of the space and at the front, then think about which end the wardrobe's tall side will sit against. A wardrobe that clears the ceiling at the tall end may be nowhere near fitting under the slope at the other.

Door swings, drawers and the space you actually use

Fitted is not the same as usable. A hinged door on a 500mm cabinet needs roughly its own width again to swing open, plus somewhere for you to stand while you use it. If the wardrobe sits beside the bedroom door, check that the two doors cannot collide when both are open at once.

Drawers need their full travel plus standing room — call it 600mm or so clear in front, and more if that floor space is shared with a bed or a chest of drawers. Also ask yourself what the wardrobe will block:

• A radiator, which will lose you heat output and possibly cause the back of the wardrobe to swell
• A socket you use for a lamp, phone charger or hairdryer
• A light switch positioned just inside the door
• A curtain track or a window, and the daylight coming through it
• The only sensible spot for a mirror

If the space is genuinely tight, sliding doors or open shelving often work better than a hinged wardrobe that can only open halfway.

Check the delivery route before you check anything else

A wardrobe that fits the alcove but not the stairs is no use to anyone. Walk the route from the front door to the bedroom and measure every pinch point: porch steps, the front door itself when open, hallway turns, the bottom of the stairs, the point where the staircase meets the ceiling above, handrails and newel posts, the landing, and the bedroom doorway.

Internal doors are commonly around 762mm or 838mm wide and roughly 1,981mm tall, and the clear gap once a door is open on its hinges is narrower than the frame suggests. Measure the actual opening, with the door pushed back as far as it will go.

Then ask how it arrives. If it comes flat-packed, the pieces are far easier to manoeuvre than a fully assembled carcass. If it arrives built, measure again and assume the tightest point will be tighter on the day. It is also worth confirming whether delivery is kerbside only, and whether anyone will carry it upstairs.

A measuring routine that catches most mistakes

1. Work in millimetres and write everything down as you go. Do not trust memory.
2. Record width at floor, waist and head height, and keep the smallest figure.
3. Record height at both ends of the space, measured from the floor you will actually have — not the old carpet you are about to lift.
4. Record depth from the bare plaster, then note skirting, radiators, pipework and sockets separately.
5. Photograph the space with the tape measure visible in each shot, so you can check your numbers later.
6. Walk and measure the delivery route, including the bedroom doorway.
7. Mark the wardrobe's footprint on the floor with masking tape and live with it for a day.

Before you order

Once the tape is down, stand a broom handle or a stack of boxes at the intended height to get a feel for how the piece will sit in the room. Check whether you are planning new flooring, because a thicker carpet or underlay will change your floor level and your height measurement.

If your alcove has a sloped ceiling, an out-of-square corner or a chimney breast to work around, get the measurements checked by the maker before ordering. A made-to-measure oak wardrobe for an awkward space is often better value than a standard size that fits badly, and it will look deliberate rather than wedged in. Take your time now and the wardrobe will simply look like it was always meant to be there.

Photo: marshmallowpanda / Pixabay