DIY vs Professional Furniture Assembly: When to Call a Pro

If you've just moved to the Margem Sul, there's a good chance your first weekend involved a trip across the bridge to IKEA Alfragide or down the A2 to Loures — followed by an evening surrounded by cardboard, Allen keys and a diagram that assumes rather a lot. Furnishing a home from scratch is one of the defining experiences of arriving in Portugal as an expat, and flat-pack furniture is almost always part of it.

The question is not whether you can assemble it yourself — most people can, eventually. The question is whether it's the best use of a weekend, and whether the result will be as solid, square and safe as it should be. Having assembled furniture in hundreds of homes from Almada to Setúbal, we can tell you honestly: sometimes DIY is the right call, and sometimes paying a professional is clearly the cheaper option once you count everything.

Here's how to decide.

Advertised assembly times vs reality

Manufacturers' time estimates assume two experienced people, a clear room, and no mistakes. Real life is different. As a rule of thumb, double the printed estimate if it's your first time with that product — and triple it if you're working alone.

Some real-world examples from our jobs:

• Bookcase (BILLY-type): advertised "30 minutes", realistically 45–60 minutes solo.
• Chest of drawers: each drawer is a small project in itself; 2–3 hours is normal for a first-timer.
• PAX wardrobe with sliding doors: the box says a couple of hours; alone, in a bedroom with sloping ceilings, it can swallow an entire day — and sliding-door alignment is genuinely fiddly.
• A full kitchen: this is not a weekend job for one person. Cabinet assembly, levelling on Portuguese floors (which are rarely perfectly flat), worktop cutting and appliance fitting is multi-day work.

If you've just arrived and have fifteen boxes to build before the family can properly move in, the arithmetic changes quickly.

The tools that make or break the job

The Allen key in the packet will technically do it. It will also give you blisters and take twice as long. A sensible minimum kit:

• A decent cordless drill/driver with a clutch (crucial — chipboard strips easily)
• Pozidriv bits (PZ2 especially — most flat-pack screws are Pozidriv, not Philips, a distinction that ruins a lot of screw heads)
• A rubber mallet, spirit level and tape measure
• A stud/cable detector before any wall fixing

All of this is available at Leroy Merlin in Almada or any local bricolage shop — a worthwhile investment if you plan to keep DIYing.

The mistakes that permanently ruin furniture

Flat-pack is unforgiving. The most common ways people wreck brand-new furniture:

• Overtightening cam locks and screws — chipboard doesn't give second chances; once the thread strips, that joint is weak forever.
• Confusing similar-looking panels and only noticing after everything is glued and doweled.
• Assembling on a hard tile floor without a blanket — Portuguese homes rarely have carpet, and laminate faces scratch instantly.
• Skipping the back-panel nails or the diagonal check, leaving a wardrobe that racks and wobbles.
• Building a large wardrobe flat on the floor in a room where it then can't be tipped upright — measure the diagonal against your ceiling height first, especially in older houses.

Repairing stripped chipboard is possible but never invisible. Prevention is everything.

Wall anchoring: not optional, especially with children

This deserves its own section. Chests of drawers, bookcases and wardrobes must be anchored to the wall — tip-over accidents involving children are well documented, and every major manufacturer now insists on it. Two things catch newcomers out in Portugal:

1. The walls are different. Many Margem Sul homes — from apartments in Corroios to villas in Quinta do Conde — have hollow brick (tijolo furado) walls, not the solid masonry or timber studs you may be used to. Standard plugs supplied in the box often don't hold. You need the right anchors for hollow brick, and in some newer builds, plasterboard fixings.
2. Rented property. Anchoring is still expected; talk to your landlord, but don't skip it in a child's bedroom. A small filled hole at the end of a tenancy is trivial compared with the alternative.

If you're not confident identifying your wall type, this alone is a good reason to bring in handyman services for an hour.

When paying a professional genuinely pays off

DIY makes sense for small, simple pieces: side tables, simple shelving, a desk. Professional furniture assembly earns its money on:

• PAX and other large wardrobe systems — heavy, precision-dependent, and miserable alone.
• Kitchens — levelling, sequencing and appliance integration are skilled work.
• Wall beds and anything load-bearing mounted to a wall — a failed fixing here is dangerous, not just annoying.
• Whole-house moves — when you have twenty boxes and a job to start on Monday, a crew that builds everything in a day is worth every euro.
• Anything requiring wall anchoring into hollow brick if you don't own a drill suitable for masonry.

What influences the cost? Mainly the number and size of items, wall-fixing requirements, access (a fourth-floor walk-up in Cacilhas is not the same as a ground-floor villa), and whether old furniture needs dismantling first. Get an itemised quote and compare it honestly against your own time.

The bottom line

Build the small stuff yourself — it's satisfying and low-risk. But for wardrobes, kitchens, wall-mounted furniture and full home setups, a professional finishes faster, the furniture ends up squarer and stronger, and everything gets safely anchored to walls that behave differently from the ones back home.

Furnishing a new place on the Margem Sul and dreading the boxes? Message Arranja Já on WhatsApp with a photo of what needs building and we'll send you a free quote.