How to Avoid Cowboy Builders in Spain - Red Flags Every Expat Must Know

The problem with cowboy builders in Spain

Every expat community on the Costa del Sol has its horror stories. The builder who took a €10,000 deposit and never came back. The bathroom renovation that flooded the flat below three weeks after completion. The extension that turned out to have no planning permission and had to come down at the owner's expense.

It's more common than you'd think, and it happens disproportionately to expats, because expats are seen as easier targets. Less likely to know their rights, less likely to speak Spanish well enough to complain formally, and more likely to have money.

The good news is that cowboy builders are not hard to spot if you know what you're looking for. The warning signs are usually the same, and they show up early, usually before a single brick has been laid.

Red flag one - they want a large cash deposit upfront

A reasonable deposit for building work in Spain is 20 to 30 percent of the total quoted price. It covers materials and gets the job started. Anything above that is a warning sign, particularly requests for 50 percent or more before work begins.

Cash-only requests are a separate red flag on top of that. A legitimate business will invoice you and accept bank transfer. Cash payments leave you with no paper trail, no proof of what was agreed, and no recourse if things go wrong. If a builder insists on cash and gets uncomfortable when you ask for an invoice, that's your answer.

Red flag two - no written quote, or a quote that keeps changing

A professional tradesperson will give you a written quote that breaks down labour, materials, and timescales. It will have their company name, address, and NIF (tax identification number) on it. It won't be a number scribbled on the back of a piece of paper, and it won't change significantly once work has started.

The classic cowboy move is to quote low to get the job, then once they're on site and you're committed, the costs start climbing. "We found a problem with the wiring." "The materials we quoted aren't available, we need to use these more expensive ones." Each claim might sound plausible on its own, but the pattern is the giveaway.

Get everything in writing before work starts. If they won't do that, they're not the right person for the job.

Red flag three - no insurance and no registration

In Spain, tradespeople working in regulated sectors, particularly electrical, gas, plumbing, and structural, are legally required to be registered with the relevant professional body and carry liability insurance (seguro de responsabilidad civil). This isn't optional. It's what protects you when something goes wrong.

Ask directly: are you registered with the Colegio Profesional or relevant trade body? Do you have liability insurance? Can you show me the certificate?

A legitimate tradesperson will answer these questions without hesitation. A cowboy builder will deflect, get vague, or tell you it isn't necessary for this type of job. It always is.

Red flag four - they pressure you to decide quickly

"I've got a gap in my schedule next week but I need to know by tomorrow." "I can do it at this price now but I can't guarantee it next month." "I've got another client interested in this slot."

Pressure tactics are designed to stop you thinking clearly and doing your homework. A builder who is good at their job and busy with legitimate work doesn't need to pressure anyone. They have enough enquiries coming in that they can afford to let you take your time.

When someone pushes you to decide fast, slow down deliberately. Say you need a few days. Get the quote in writing. Use that time to get a second opinion.

Red flag five - they can't provide references or reviews

Any builder who has been working on the Costa del Sol for more than a year should be able to point you at previous clients or show you completed work. If they can't, or won't,  that tells you something.

Don't just accept a name and a phone number either. Ask if you can see a completed job in person. Look them up online. Search their company name and NIF together. Check expat Facebook groups - not to ask for recommendations, but to search and see if their name comes up in complaints.

If they're reluctant to show you their work, that's your answer.

Red flag six - they disappear mid-job

This one is harder to prevent than spot in advance, but it's worth knowing what to look for. The warning signs mid-job are: constant reasons why work has stalled, requests for more money before the agreed stage is complete, increasingly difficult to reach by phone, turning up for an hour then disappearing for three days.

The best protection here is a staged payment structure written into your contract. You pay at agreed milestones, not on demand. Never pay for work that hasn't been done, and never pay the final instalment until the job is complete and you're satisfied.

What to do if you've already hired a cowboy builder

First, stop paying. Don't advance any more money until the situation is resolved.

Second, document everything. Photographs of the work at every stage, copies of all messages, the original quote, every receipt. WhatsApp conversations count as evidence in Spanish courts.

Third, get a second tradesperson to assess the work and give you a written opinion on what's been done and what it would cost to fix or complete it properly.

Fourth, contact your local Oficina Municipal de Información al Consumidor (OMIC) - the consumer advice office. They can advise on your rights and in many cases mediate before things go to court. Your local ayuntamiento (town hall) can tell you where your nearest OMIC is.

If the amount involved is significant, speak to a Spanish lawyer. Many offer a free initial consultation, and for jobs over a few thousand euros it's usually worth it.

The simplest protection available

Most expats who get burned by cowboy builders have one thing in common: they found the tradesperson through an unverified source and had no way to check their track record before handing over money.

SpainTrades lists only vetted tradespeople, registered, insured, and reviewed by real expat clients after every job. Before you hire anyone for work on your home, it's worth checking whether they're listed and what other expats have said about them.

Start your search at www.spaintrades.es