How to Avoid Construction Fraud in Portugal - Practical Guide
Portugal has a serious problem with construction fraud, and it is not new. According to IGAMAOT (the General Inspection for Agriculture, Sea, Environment and Spatial Planning), 94% of construction projects in Portugal involve some form of irregularity. Most people only discover they have been scammed after paying thousands of euros and the work has stopped, or worse, when the company has simply vanished.
This guide is not theory. It is based on real fraud patterns documented in Portugal, cases that made the news, and warning signs anyone can identify before signing a contract. Every case is different, always consult a lawyer for your specific situation, but these are the starting points for protecting yourself.
The most common warning signs
There is a set of red flags that appear in virtually every construction fraud case in Portugal. None of them, on their own, necessarily means you are dealing with a scam. But when two or three appear at the same time, it is time to stop and investigate before moving forward.
- No IMPIC license - the company does not hold a valid construction license (alvará), or the license is expired, suspended, or revoked. If they cannot show you the license, do not hire them. Period.
- Company is too new - incorporated just a few months ago with minimal share capital. This is especially concerning when combined with promises of high-value projects. The Rendisphera/Casa Modelar/Lumobras case is a documented example reported by the media: the same operation transferred between different companies, opening and closing entities to escape complaints and lawsuits.
- Requests large advances - any contractor asking for 50% or more of the project value before starting work is a massive risk. It is normal to request a deposit of 10% to 20%, but anything significantly above that should raise alarms.
- Invoices on personal tax number - if the company issues invoices under the owner's personal tax number instead of the company's, something is clearly wrong. It may indicate tax problems or an attempt to avoid traceability.
- Reacts aggressively when questioned - legitimate contractors have no problem showing credentials, providing references from previous work, or explaining the project plan. If the response to normal questions is aggression or evasion, walk away.
- Only accepts cash - insistence on cash payments with no receipt is one of the biggest red flags there is.
- Budget with no detail - a single-line quote that says "complete project: X euros" is not acceptable. A proper budget breaks down materials, labor, timelines per phase, and payment terms.
The most common fraud patterns
Construction fraudsters in Portugal are not particularly creative. The schemes tend to repeat themselves with minimal variations. Knowing the patterns is the best defense.
The company carousel
This is perhaps the most insidious pattern and the hardest to detect for someone who does not know what to look for. It works like this: the contractor opens a company, accumulates debts and complaints, declares insolvency (or simply abandons the company), and opens a new one with a different name. The process repeats, sometimes with 3, 4, or 5 companies over just a few years.
The case documented by the press involving Rendisphera, Casa Modelar, and Lumobras is a concrete example of this pattern: the same brand transferred between different legal entities, with the same directors, while customers of previous companies were left without work done and without their money.
This is why checking the directors of a company, not just the company itself, is fundamental. A director with a track record of 3 consecutive insolvencies is an enormous risk, regardless of the current company's name.
Progressive abandonment
In this pattern, the work starts normally. The contractor shows up, does initial work (often demolitions or earthmoving, which are cheap), and then starts requesting more advance payments claiming "unforeseen circumstances" or "material cost increases." Deadlines slip, crews show up less and less, and eventually the contractor disappears with the advance money.
Duplicate sales
In the case of new builds, the same property is sold to multiple families. This was exactly the scheme in the Palmela case, which affected 114 families and involved approximately 27 million euros. Deposits are collected from multiple buyers for the same unit, and when the scheme collapses, everyone is left without a home and without their money.
Statistics that should worry you
The numbers do not lie. In 2024, over 2,000 insolvencies were registered in Portugal's construction sector, an average of more than 5 per day. Consumer complaints related to construction work and contractors were among the fastest-growing categories, according to data reported by Idealista.
The fact that 94% of construction projects have irregularities, according to IGAMAOT, does not mean 94% are fraud. Many irregularities are administrative or technical. But it does mean the sector operates with an extremely high rate of non-compliance, and the risk of encountering problems is the rule, not the exception.
How to report fraud
If you have already been a victim of construction fraud, there are three main channels to take action:
- Criminal complaint - file a complaint with the PSP, GNR, or directly with the Polícia Judiciária (PJ). For significant fraud, the PJ is usually the most appropriate authority. The criminal complaint formally initiates an investigation.
- DECO Proteste - use the DECO complaints platform to formally register your complaint. DECO can mediate the conflict and, in some cases, support collective actions when there are multiple victims of the same contractor.
- IMPIC - file a complaint with IMPIC, especially if the contractor operates without a license or with an inadequate one. IMPIC can suspend or revoke licenses and impose fines.
Legal protections that already exist
Portuguese law offers some protections that many property owners are unaware of:
- DL 84/2021 - construction warranties: establishes mandatory warranties of 10 years for structural defects and 5 years for other construction defects. If your project shows defects within these periods, the contractor is legally obligated to repair them.
- Defect notification deadline: you have 30 days after discovering a defect to notify the contractor in writing. Do not miss this deadline, as you may lose the right to repair.
- Mandatory insurance: the contractor is required to carry liability insurance and workplace accident insurance. Always request proof of insurance before work begins.
However, these protections only work if the company exists and is solvent. If the contractor declares insolvency, the warranties become very difficult to enforce. This is why prevention, checking before hiring, is always better than trying to remedy things afterwards.
How to protect yourself in practice
Summarizing everything into a concrete action plan:
- Check the IMPIC license before any commitment
- Search the company's tax number on CITIUS for insolvencies or lawsuits
- Check the company's directors, not just the company itself
- Never pay more than 10-20% as an initial deposit
- Demand a detailed written contract with timelines, values per phase, and delay penalties
- Always pay by bank transfer, never in cash
- Ask for references and visit the contractor's previous projects
- Make payments in phases, conditional on completion of each stage
Every case is different, and every project has its own circumstances. Always consult a lawyer before signing high-value contracts.
Automatic verification with ObraXRAY
Doing all these checks manually takes hours. ObraXRAY automates the process: just enter the company's tax number and in minutes you have a complete report that cross-references the IMPIC license, court records from CITIUS, tax debts, directors, and more. Everything consolidated into a risk score anyone can understand.
Do not wait until you have problems. Check before you hire.