Property due diligence checklist for Portugal: the documents you must check
A property due diligence checklist for Portugal: the six documents to verify before you sign, what each one proves, and where to pull it online.
Since Decreto-Lei n.º 10/2024, de 8 de janeiro (DL 10/2024), no public official checks a property's paperwork for you before you sign in Portugal. The Câmara Municipal stopped verifying conformity at sale, and the notary confirms identities and the deed, not the building's legal history. From 1 September 2026, Decreto-Lei n.º 108/2026, de 29 de maio adds a mandatory título urbanístico declaration to every sale contract, which puts one more document on your side of the table. This checklist sits inside our broader property due diligence guide for Portugal and covers the six records you must read yourself: what each one proves, where to pull it online, and the red flags to watch. The HomeOS Simplex Liability Checker reads them for you and flags what is missing.
Table of Contents
- Why does Portugal leave the document check to you?
- Which documents must you check before you sign?
- Certidão Permanente or Caderneta Predial: which one proves ownership?
- What do the use permit, energy certificate, and condominium records confirm?
- What are the document red flags, and how do you check them fast?
- Frequently Asked Questions
Why does Portugal leave the document check to you?
DL 10/2024 removed mandatory municipal verification before sale, which transferred full liability for undisclosed legal defects to the buyer at the Escritura.
Most foreign buyers assume someone in the chain checks the paperwork. In Portugal, since DL 10/2024, no one does. The reform stripped the Câmara Municipal of its verification role at the point of sale, and the notary's job is to confirm who is signing and to formalise the deed, not to audit the property's legal record. InspectOS covers the full mechanics of that change in its Simplex Urbanístico guide; the practical result for you is simple. The day you sign the Escritura, every undisclosed legal problem becomes yours.
That gap matters because Portugal has no mandatory pre-purchase inspection culture. INE Census 2021 found that 35.8% of Portuguese buildings need repair, and the average cost to fix a hidden defect after purchase runs to €12,400 (InspectOS data). The legal record will not show you a leaking roof, but it will show you whether the seller actually owns the property, whether the build was authorised, and whether debts or charges follow the deed to you.
One more document joins the list soon. From 1 September 2026, DL 108/2026 requires a título urbanístico declaration in every sale contract, with three possible seller statements at the deed. Our DL 108/2026 explainer walks through what changes and when.
Which documents must you check before you sign?
A document check in Portugal covers six records: the registry certificate, the tax record, the use permit, the energy certificate, the condominium declaration, and the registered charges.
This is the paper layer of due diligence, and you can pull most of it online before you ever visit. The six records below are what a careful buyer, or a lawyer acting for one, verifies before the CPCV. Read them in this order, because the first one tells you whether the rest are even worth checking.
The list covers the registry certificate (Certidão Permanente), the tax record (Caderneta Predial), the use permit (licença de utilização, soon the título urbanístico), the energy certificate (Certificado Energético), the condominium debt declaration, and the registered charges (ónus e encargos). Each proves a different thing, and a clean copy of one does not vouch for the others.
The paper layer answers a narrow question: does the legal picture hold together? It does not tell you whether what is built matches what was authorised, or what physical condition the property is in. That second question is the gap the Property Condition Score (PCS) measures, the HomeOS score that grades the distance between a property's documented state and its physical reality. Start with the documents, then close the gap.
Certidão Permanente or Caderneta Predial: which one proves ownership?
The Certidão Permanente proves who owns a property and what charges sit on it; the Caderneta Predial is a tax record and proves neither.
This is the single most common mistake buyers make in Portugal, including Portuguese buyers. The two documents sound interchangeable. They are not.
The Certidão Permanente do Registo Predial is the live extract from the land registry. It names the current owner, the property's registry description, and every charge recorded against it: mortgages, seizures (penhoras), usufruct, and rights of first refusal (direito de preferência). You order it online from Predial Online, run by the IRN, for 15€, and it stays valid for six months. This is the document that proves who you are buying from.
The Caderneta Predial Urbana is a fiscal record held by the Autoridade Tributária (AT). You pull it free from the Portal das Finanças. It shows the taxable value (VPT), the area on file, and the registered fiscal owner for tax purposes. A lawyer quoted in the buyer research put it bluntly: the caderneta predial is irrelevant as proof of ownership. It is a tax document, and the tax owner and the legal owner can differ.
Read both, then compare them. If the area on the Caderneta Predial does not match the Certidão Permanente, or if the person selling is not the registered owner on the certidão, stop and ask why before you pay a deposit.
What do the use permit, energy certificate, and condominium records confirm?
The licença de utilização confirms a property can legally be lived in; from September 2026 the título urbanístico must be declared in every deed.
The licença de utilização (use permit) confirms the property may legally be used for its stated purpose, usually housing. Buyers still search for this term, so keep it in mind, but the law is moving to the título urbanístico, which records that the construction itself was legally authorised. The two are not the same: a building can be authorised to exist without being cleared for use, and the reverse. From 1 September 2026, DL 108/2026 requires the seller to declare the título in the contract, choosing one of three statements: that they hold and present it, that they hold it without presenting, or that they do not have one. The third answer is the one to slow down for. Our DL 108/2026 explainer covers the scenarios and the dates in full.
The Certificado Energético (energy certificate) records the property's energy class, from A+ to F, and is mandatory for any sale under Decreto-Lei n.º 101-D/2020. It is valid for ten years. The seller obtains it through an assessor registered with ADENE, and you can confirm a certificate's status on the SCE portal. The class is more than a formality; it shapes running costs and financing, but for the checklist your task is narrow: confirm a valid certificate exists and matches the property.
The condominium debt declaration became mandatory at the deed under Lei n.º 8/2022, de 10 de janeiro, in force since 10 April 2022. The condominium administrator must issue it within ten days of a request, listing any outstanding charges. The seller is liable for debts up to the date of the Escritura, and the buyer takes on charges only from that date. You can waive the declaration in the deed, but waiving it means inheriting whatever the seller owes.
The ónus e encargos are the charges already named on the Certidão Permanente: mortgages, penhoras, usufruct, and preference rights. A mortgage that has been repaid but not formally discharged still shows here, so confirm that any charge is cancelled before completion, not just promised.
What are the document red flags, and how do you check them fast?
Mismatched areas, unregistered extensions, outstanding charges, and an expired energy certificate are the most common document red flags in Portuguese listings.
Once you have the six records, the review comes down to consistency. The documents should tell one coherent story about one property and one owner. Where they disagree, you have found your risk. The frequent red flags: the seller's name does not match the owner on the Certidão Permanente; the area on the Caderneta Predial differs from the registry; a mortgage or penhora is still active; there is no licença de utilização or título urbanístico on file; the energy certificate is missing or past its ten years; the condominium declaration is absent.
Checking six records by hand, in a second language, takes time most buyers do not have between an accepted offer and the CPCV. The HomeOS Simplex Liability Checker reads the documents and public records for you, flags what is missing, and surfaces the inconsistencies above so you know what to ask before you commit.
Run your property's paperwork through the Simplex Liability Checker. It reads the records, flags missing documents, and surfaces the inconsistencies that follow you to the deed.
→ Use the Simplex Liability Checker: automated document and red-flag check
The document check answers what is on paper. It cannot tell you whether what was built matches the plans, or what condition the property is in behind the walls. When the paper raises a question about the physical build, the next step is a physical one. InspectOS covers that handoff in its guide to inspecting a property before signing the CPCV. If you want to compare the tools available for the document layer itself, our review of VeriCasa and the alternatives sets them side by side. [VERIFY LIVE - EN-J5 publishes 16 Jul]
This is general information, not tax or legal advice. Verify your situation with a qualified professional.
Frequently Asked Questions
Does the Caderneta Predial prove who owns a property in Portugal?
No. The Caderneta Predial is a fiscal record from the Autoridade Tributária showing the taxable value and the registered tax owner. Ownership is proved by the Certidão Permanente do Registo Predial, which names the current legal owner and any charges. Always read both and check that they agree.
Where can I get a Certidão Permanente online?
You order it from Predial Online, run by the IRN, for 15€, and it stays valid for six months. It is the live extract from the land registry, so it shows the current owner, the property description, and registered charges such as mortgages and seizures.
Is a document due diligence checklist enough, or do I still need an inspection?
The checklist covers the paper layer: ownership, permits, certificates, and charges. It does not cover physical condition or whether the build matches what was authorised. For that you need a separate physical inspection, which InspectOS handles. The two layers are complementary, not alternatives.
What changes with the título urbanístico in September 2026?
From 1 September 2026, DL 108/2026 requires the seller to declare the título urbanístico in every sale contract, with three possible statements. Buyers still search for the older term, licença de utilização, so keep both in mind. The full timeline and scenarios are in the HomeOS DL 108/2026 explainer.
Who pays condominium debts after a sale?
Under Lei n.º 8/2022, the seller is liable for condominium debts up to the date of the Escritura, and the buyer takes on charges only from that date onward. The administrator must issue the debt declaration within ten days of a request. You can waive the declaration in the deed, but doing so means inheriting any unpaid balance.
Conclusion
In Portugal, no one verifies a property's documents for you, and on the day you sign the Escritura the legal problems become yours. Pull the six records, read them in order, and check that they tell one consistent story. Where they do not, you have found the question to ask before you pay a deposit. The Simplex Liability Checker does the reading and flags the gaps, so you walk into the CPCV knowing what you are buying.
Updated July 2026 | HomeOS Portugal Reviewed by Filipe Dornellas
Sources: Decreto-Lei n.º 10/2024, de 8 de janeiro (DL 10/2024); Decreto-Lei n.º 108/2026, de 29 de maio; Decreto-Lei n.º 101-D/2020 (Certificado Energético); Lei n.º 8/2022, de 10 de janeiro (condominium debt declaration); IRN / Predial Online (Certidão Permanente, 15€, validade 6 meses); Autoridade Tributária / Portal das Finanças (Caderneta Predial); ADENE / SCE (energy certificate); INE Census 2021 (35.8% of buildings need repair); InspectOS (average hidden-defect cost €12,400).