Why you need an independent property survey before buying in Portugal

In Portugal, nobody hands you a survey. Unlike the process many buyers know from the US or UK, a building survey is not standard practice here and it is not legally required. That surprises a lot of the families we work with, and it is exactly why we bring it up early.

The temptation is to skip it. The house looks lovely, the sun is out, the agent is keen, and you are eager to secure it. But once you sign the promissory contract and pay your deposit, your options narrow fast. A survey is one of the few things that gives you real, independent information while you can still act on it. Here is what it costs, what it catches, and why the timing matters more than almost anything else.

Why nobody gives you a survey in Portugal

If you have bought before in Britain or North America, you may expect a survey to be part of the furniture. In Portugal it is not. A building survey is not standard practice and not legally required. Plenty of purchases go through without one.

That does not mean you should follow suit. For older villas, rural homes, extended properties and off-plan handovers, a survey is one of the most worthwhile things you can commission. In Portugal these reports are typically carried out by civil engineers, and a good one covers a structural appraisal, non-structural defects, a damp survey and an appraisal of the services such as the electrics and plumbing.

Think of it this way. The seller and the agent both want the sale to complete. Your lawyer checks the paperwork and the legal title. The surveyor is the one person whose only job is to look hard at the actual building and tell you, plainly, what shape it is in.

What a survey costs

The good news is that it is not expensive relative to what you are buying. A standard assessment typically costs €400 to €1,000, rising to around €2,000 for larger or heavily extended properties. Surveyors price by size and access, so the shape of the property matters more than the price tag on it.

These are indicative market ranges rather than fixed tariffs, and some surveyors charge more per square metre above a certain size. But the principle holds: on a purchase worth several hundred thousand euros, a survey is a rounding error that can save you from a very expensive mistake.

What a survey actually catches

A Portuguese survey is broader than a simple condition check. Carried out well, it looks at structural integrity, moisture and damp, the roof and insulation, electrical and plumbing systems, sewerage, unauthorised modifications and illegal construction, boundaries and energy efficiency. Some of those are about comfort and repair bills. Others are about whether the property is even legally what it claims to be.

That last point deserves attention. An inspection by the environmental and planning inspectorate, IGAMAOT, found that between 2020 and 2024, a large majority of the 1,312 urban construction operations it evaluated showed at least one form of illegality, such as building too close to boundaries or exceeding the permitted built area or number of floors. Two caveats matter. These were operations the inspectorate had already selected to inspect, not a random sample of all Portuguese building, so this is not evidence that most homes are illegal. And many of the findings are technical breaches rather than dangerous construction. Even so, they are exactly the kind of thing you want to know about before, not after, you own the place.

Alongside the building itself, a survey and proper due diligence together tend to surface a familiar list of legal pitfalls:

• Properties built or enlarged without planning permission. An extension that was never signed off can be hard to insure, hard to resell and, in some cases, subject to enforcement.
• Unauthorised pools. A pool added without the right permits can require costly retrospective licensing, and in some cases removal.
• Undischarged mortgages. A charge from the previous owner that has not been cleared can follow the property.
• Outstanding utility and rates bills. Small on their own, but they should be settled before completion, not discovered after.

Why timing matters: survey before the CPCV

This is the part we cannot stress enough. A survey is only useful while you can still walk away, and in Portugal that window closes at the promissory contract. The CPCV (Contrato de Promessa de Compra e Venda) is signed after your offer is accepted and before the final deed, and it is where you pay your deposit, known as the sinal. That deposit is typically around 10 percent of the price for resale homes and 20 to 30 percent for off-plan or new builds, and it is often paid directly to the seller, because escrow is not standard in Portugal.

Here is why that matters so much. Under Article 442 of the Portuguese Civil Code, if the buyer backs out the seller keeps the deposit, and if the seller defaults they must return double the deposit to the buyer. That rule protects both sides, but it also means that once you have signed and paid, changing your mind over something a survey would have caught can cost you your entire deposit. Best practice is clear: commission the survey during due diligence, before signing the CPCV or paying the deposit.

One honest caveat. Seller-drafted CPCVs sometimes rewrite the double-deposit protection to the buyer's disadvantage, so the clause itself is something your lawyer should read carefully. As of 2026 this is the standard framework, but individual contracts vary, and this is not legal advice for your specific case.

The survey plus the paperwork

A survey looks at the building. Just as important is the file of documents behind it, and neither one is sufficient on its own. There are four core documents that should be verified before you sign the CPCV, each revealing a different risk:

That energy certificate is not optional. An Energy Performance Certificate is legally mandatory for both new and existing buildings when they are advertised for sale or rent in Portugal. The energy class has to appear in the listing, and a valid certificate must be handed to the buyer at completion. If a seller cannot produce one, treat that as a question worth asking.

The survey and the documents cover different ground. The paperwork tells you what the property legally is and who has a claim on it. The survey tells you what it physically is and what it will cost to keep. You want both, before you are committed.

Buying from abroad makes this more important, not less

Many buyers here are purchasing from overseas. Foreigners accounted for about 28 percent of home purchases in Portugal in 2025, and buyers with tax residence outside Portugal bought 8,471 homes, down 13.3 percent on the year and the third consecutive annual fall. Whichever way the trend runs, a large share of purchases involve people who cannot easily pop back for a second look.

If you are buying without standing in the property yourself, an independent survey stops being a nice-to-have and becomes your eyes on the ground. It is the difference between trusting photographs and trusting an engineer who has walked the roof, tested the damp and checked whether that lovely extension was ever signed off. As of 2026, this is the single check we would least want a remote buyer to skip.