How to Choose a Construction Company in Portugal - Full Guide 2026
Building or renovating a home is, for most Portuguese families, the biggest investment of their lives. We're talking about values between €100,000 and €150,000 for an average project, and in many cases considerably more. Even so, the choice of construction company often ends up being made based on a neighbor's recommendation, a quote that "looked good," or simply whoever showed up first. The result? Stalled projects, companies that vanish mid-build, budgets that double without warning, and in the worst cases, insolvent contractors who take the money with them.
This guide exists to change that. We'll walk through, step by step, everything you should verify before signing a contract with any construction company in Portugal.
Why choosing the right construction company matters so much
The numbers speak for themselves. According to data from IGAMAOT (Inspeção-Geral da Agricultura, do Mar, do Ambiente e do Ordenamento do Território), 94% of inspected urban planning operations in Portugal had irregularities. This refers to operations already flagged for inspection, not a random sample of all construction work, but it illustrates how consistently problems are found when anyone actually looks closely. The pattern is clear.
Cases like the Palmela scandal, where the same house was sold to 4 different families and 114 families lost everything, are not rare exceptions in the Portuguese construction landscape. And the most concerning part: the builder had no prior negative history in public records. It was a first-time fraud.
The good news is that most of these problems can be avoided. You just need to know where to look and what to check. That's exactly what we'll cover here.
Step 1: Verify the IMPIC license
The first step, and arguably the most important, is confirming that the construction company holds a valid license issued by IMPIC (Instituto dos Mercados Públicos, do Imobiliário e da Construção). The license (alvará) is basically the permit that authorizes a company to carry out construction work in Portugal. Without it, the company is operating illegally.
What to check in the license
- Validity: Licenses have an expiry date. An expired license is the same as having no license at all.
- Qualification class: Classes range from 1 to 9 and define the maximum project value the company can take on. A contractor with class 1 cannot legally do a €500,000 project. Confirm that the class covers the value of your project.
- Categories and subcategories: The license specifies what types of work the company can perform, from structures and foundations to electrical installations, plumbing, finishes, and other specialties. Verify that the categories cover the type of work you need.
- Current status: Check whether the license is active, suspended, or cancelled. A suspended license may indicate financial problems or non-compliance with obligations.
The lookup can be done directly on the IMPIC portal, but the process isn't exactly intuitive. We'll explain how to simplify all of this further on.
Step 2: Check court records (CITIUS)
This is the step almost nobody takes, but it can save you thousands of euros. The CITIUS system is the case management platform for Portuguese courts, and it allows you to check if a company has associated court proceedings.
What to look for
- Insolvency proceedings: If the contractor has an ongoing insolvency case, walk away. Even if it's still operating, the signs that the company is in serious financial trouble are right there.
- PER (Processo Especial de Revitalização): A PER means the company is trying to restructure its debts to avoid insolvency. It's not necessarily the end of the world, but it's a serious warning sign that should be weighed carefully.
- Civil and enforcement actions: Multiple proceedings filed against the contractor can indicate a pattern of non-compliance, delays, or poor-quality work.
- Frequency and recency: A single case from 10 years ago is different from 5 cases in the last 2 years. The pattern matters more than any individual case.
Searching CITIUS directly requires some familiarity with the system and knowing exactly what to look for. Many people don't even know this search is possible.
Step 3: Ask for references and see previous work
After the formal checks, it's time to do the fieldwork. And here, honestly, there are no shortcuts.
- Ask the company for at least 3 references from previous clients with projects similar to yours in type and value.
- Contact those references directly. Ask whether the project came in on budget, whether there were significant delays, how communication was during the process, and whether they'd recommend the company.
- Visit completed projects if possible. There's nothing like seeing the quality of work with your own eyes.
- Search online: Google reviews, Portal da Queixa, construction forums. A company with dozens of consistent complaints probably has a real problem.
- Be suspicious of anyone who refuses to provide references. A serious contractor always has satisfied clients to present.
This phase takes time, but think of it as an investment. A few hours of research can save you months of problems and thousands of euros.
Step 4: Analyze the detailed quote
A construction quote is not a price on a napkin. If the proposal you received is a single page with a total value and little else, that's a warning sign.
What a good quote should include
- Breakdown by chapter: Demolitions, structure, masonry, electrical installations, plumbing, wall coverings, carpentry, painting, etc. Each chapter with its own line items.
- Quantities and unit prices: It's not enough to say "ceramic tiling - €5,000." It should indicate the area in sqm, the price per sqm, and the type of material.
- Brand and quality of materials: "Medium quality faucets" is not a specification. It should have a brand, model, or at least a clear reference.
- Execution timeline: With a phase-by-phase schedule, not just a final date.
- Conditions for extra works: How are works outside the initial scope handled? What's the approval process and how much do they cost?
Red flags in the quote
- Value significantly below competitors: If three companies quote between €80,000 and €95,000 and one comes in at €55,000, they're probably not including everything or plan to charge extras later.
- No VAT breakdown: Could indicate the company intends to operate partially outside the tax system.
- Request for full upfront payment: Never, under any circumstances, pay the full amount before the project is complete.
Step 5: Check state debts
A contractor with debts to the Tax Authority or Social Security is a contractor in trouble. And a company in financial difficulty is a company with a high risk of not finishing your project.
- Tax clearance certificate: Can be requested from the Tax Authority (Autoridade Tributária). If the company refuses to provide this document, ask yourself why.
- Social Security compliance certificate: Issued by Social Security, it confirms the company is up to date with contributions. Social Security debts can indicate the company isn't paying its workers properly.
- Court citations (editais): If a company has court citations published, it means the courts tried to notify it and couldn't find it at its registered address. This is a classic sign of a ghost company.
These documents are public or can be requested directly from the company. A contractor that's up to date with its obligations won't have any problem providing these certificates.
Step 6: Written contract with protective clauses
After all the checks, it's time to formalize everything in writing. And when we say everything, we mean everything. A well-drafted construction contract is your best legal protection if something goes wrong.
Essential clauses
- Payment phases: Payment should be divided by project execution phases. For example: 10% at signing, 20% at foundation completion, 25% at structure, 25% at finishes, 20% at final delivery. Never front-load payments.
- Delay penalties: Set a daily or weekly penalty for delays beyond the agreed deadline. Without penalties, there's no real incentive to meet timelines.
- Construction insurance: The contractor should have civil liability insurance and a construction/assembly insurance policy. Ask for proof.
- Work guarantee: Portuguese law provides for warranty periods, but the contract can and should specify the conditions, including how to report defects and the repair timeline.
- Definition of extra works: How are works outside the initial scope approved, quoted, and paid for.
- Dispute resolution: Define how conflicts will be resolved, whether through mediation, arbitration, or court.
If possible, have the contract reviewed by a lawyer with experience in construction law. The cost of a legal review is insignificant compared to the total project value.
How ObraXRAY simplifies all of this
If you've made it this far, you're probably thinking that's a lot of checks, many different sources, and many hours of work. And you're right - that's exactly why we built ObraXRAY.
In a single search, we check multiple official sources to give you an analysis of key public records for any construction company in Portugal. CITIUS court records, IMPIC license, commercial registry, official publications, director analysis, and more - all consolidated into a clear report with a risk score that anyone can understand.
- IMPIC license verification with class, categories, and validity
- CITIUS court proceedings search (insolvencies, PER, public execution list)
- State debt verification (Tax Authority and Social Security)
- Published citations lookup
- Complete PDF report with risk score
Instead of spending hours navigating different portals, trying to interpret legal documents, and manually cross-referencing information, you do it all in minutes. No technical knowledge needed, no complications.
Try it now for free and see what you can discover about the construction company you're considering. Protecting your investment starts with information, and ObraXRAY makes sure you have it all in one place.