Assembling home office furniture: desk, chair and shelving

What tools and time to set aside

Most flat-pack desks, chairs and shelving come with an allen key, but it is thin and slow going once you have more than a dozen screws. A proper set of hex keys, or better, a cordless screwdriver with hex bits, cuts assembly time by a good half and is much easier on your wrists.

You will also want a spirit level, a pencil, a tape measure and a second pair of hands for the desk top, which is awkward for one person to hold steady while screwing in legs. For shelving that goes against the wall, add a stud finder or at least a torch to check the wall structure before drilling.

Budget more time than the box suggests. A desk and a shelving unit together, done carefully, take a good half day for someone doing it occasionally. A full office set with a chair, desk and two shelving units is a reasonable job for one afternoon if nothing goes wrong.

• Cordless screwdriver with hex and Phillips bits
• Spirit level and tape measure
• Pencil for marking hole positions
• Stud finder or torch for checking the wall
• A second person for holding the desk top

What order to assemble the set

Build the desk first, then the chair, then the shelving. The desk sets the working height and position in the room, so it makes sense to get it standing and level before you position anything else around it, including where the shelving will sit relative to it.

Within the desk itself, assemble the leg frames fully on the floor before attaching them to the underside of the desk top. Do every screw up loosely at first, get the frame square, then tighten fully in a diagonal order rather than one side at a time. This is the single step that most people skip and it is the main cause of a frame that ends up slightly twisted.

Leave the chair for last if it is a gas-lift model, since it takes ten minutes and does not depend on anything else in the room. Shelving goes up once you know exactly where the desk sits, so you are not fixing a shelf bracket into a spot the desk chair will later hit.

Why the desk wobbles and how to fix it

A wobbly desk is almost always one of three things: a leg frame that was tightened unevenly before it was square, an uneven floor, or a missing adjustable foot. Check the frame first by loosening all four leg bolts slightly, standing the desk on a level section of floor, and retightening in a diagonal pattern while checking the top stays level as you go.

If the frame itself is square but the desk still rocks, the floor is the more likely cause, which is common in older Tallinn flats where wooden floorboards have settled unevenly over decades. Most metal desk legs have a small adjustable foot with a threaded bolt; screwing it in or out a few millimetres at the short leg usually solves it without needing anything under the desk.

If there is no adjustable foot, a thin cork or rubber pad under the short leg works as a permanent fix and does not scratch the floor the way folded paper or cardboard eventually does. Avoid the temptation to just tighten the bolts harder; on a twisted frame that makes the wobble worse, not better.

Common office chair mistakes and what not to do with the gas lift

The most common mistake with a flat-pack office chair is fitting the castors or the gas cylinder before the base is fully assembled, which makes the whole thing unstable to work on and risks bending the base arms. Build the star base with all five castors pushed in fully first, then fit the gas lift into the base, then lower the seat mechanism onto the gas lift last.

Never try to remove or adjust a gas-lift cylinder once it is seated, and do not attempt to open, oil, or otherwise service one yourself. It is a sealed, pressurised part, and if a chair sinks on its own within a few weeks, that is a manufacturing fault to raise with the seller rather than something to take apart at home.

A chair that sinks slowly over months rather than weeks is normal wear on the gas cylinder and is not something that can be repaired; at that point, the cylinder itself is usually replaced rather than fixed.

Cables and fixing the shelving to the wall

Run your cable management before you push the desk fully into position, since it is far easier to clip a cable tray or trunking to the underside of the desk top while you can still tip it up and see what you are doing. A basic under-desk tray for the power strip and adapters keeps the floor clear and stops cables catching on the chair castors.

For shelving, check what is behind the wall before drilling. In prefab panel blocks around Tallinn the wall is often concrete, which needs a hammer drill and the correct wall plugs; in older wooden houses in areas like Kalamaja or Nõmme, you are more likely dealing with a stud and lath wall, where the fixing needs to land in solid timber rather than just plasterboard.

Always fix a shelf into at least two points along a stud or a solid section rather than relying on the plug alone to hold in plasterboard. If you are not sure what is behind the wall, or the unit is heavy and loaded with books, it is worth having someone check before drilling rather than after a shelf has come away from the wall.

When it makes more sense to call someone

A single desk or one shelving unit is a reasonable weekend job for most people, and there is no need to call anyone in for that. Where it starts to make sense to bring someone in is a full office setup arriving at once — desk, chair, and two or three shelving or cabinet units — where getting everything level, aligned and fixed to the wall correctly in one go saves a lot of the trial and error.

Furniture assembly is billed from 39 € per hour, and shelves and mirrors that need wall fixing are the same rate, so a small job stays a small job on the bill. For a larger multi-piece office set, it is usually worth asking for a fixed quote after describing the pieces or sending photos, since that gives you one figure to plan around rather than an open-ended hourly total.

It is also worth calling in a tradesperson if the wall turns out to be something other than what you expected, such as an old wooden wall where the stud positions are not obvious, or if a desk frame arrives visibly bent or the gas lift on a chair fails within the first weeks — that is a fault to deal with directly rather than to work around.