Property Due Diligence in Portugal: Blind Spots

Property due diligence in Portugal requires verifying four mandatory documents, the Certidão Permanente (land registry certificate), the Caderneta Predial Urbana (property tax record), the Licença de Utilização (occupation license), and the Certificado Energético (energy performance certificate), before signing any contract. Since Simplex 2024 (DL 10/2024), buyers who skip this process inherit full legal liability for unpermitted works the moment they sign the Escritura Pública. RealOS automates the document side without a property visit. Checking that those documents match the building is a separate step, and it is the one nobody else in the transaction performs.

Around 20% of property buyers in Portugal face unforeseen costs of between 10% and 25% of the purchase price after completion - costs that proper due diligence would have caught before the escritura. The Certidão Permanente carries an unregistered mortgage. The Licença de Utilização doesn't match the actual floor plan. The Certificado Energético reveals a Class F energy rating the agent never mentioned. An extension built without a permit in 1987 becomes your legal and financial liability the moment you sign.

These are not rare edge cases. Each is a documented category of Portuguese property risk, and each is visible before you sign if you know where to look. This guide covers every document you must verify, every problem to look for, and every step of the process - so you sign informed, not surprised.

Table of Contents

1. What Is Property Due Diligence in Portugal and Why Does 1 in 5 Buyers Get It Wrong?
2. What Are the Four Mandatory Documents Every Portuguese Property Buyer Must Check?
3. How Did Simplex 2024 Change What Buyers Must Verify Before Signing?
4. What Are the Most Common Problems Found During Due Diligence in Portugal?
5. Who Verifies These Documents, and What None of Them Check
6. What the Four Documents Cannot Tell You About the Building
7. Property Due Diligence Checklist: 23 Things to Verify Before You Sign
8. Frequently Asked Questions

What Is Property Due Diligence in Portugal and Why Does 1 in 5 Buyers Get It Wrong?

Property due diligence in Portugal means verifying the legal, physical, and fiscal status of a property before signing any contract. It requires cross-referencing documents from three separate, non-integrated authorities: the IRN (Instituto dos Registos e Notariado), the AT (Autoridade Tributária e Aduaneira), and the Câmara Municipal. These three systems don't automatically share data - which is exactly where problems hide, and where buyers pay.

In most countries, a single land registry gives you a reliable picture of a property's legal status. Portugal works differently. Ownership records sit at the IRN - Instituto dos Registos e Notariado (land registry authority). Tax records sit at the AT - Autoridade Tributária e Aduaneira (Portuguese Tax Authority). Building permits and occupancy licenses sit at the Câmara Municipal (municipal council). None of these automatically cross-reference each other.

A property can appear completely clean on the Certidão Permanente while carrying an irregular construction recorded only in the municipal archive. It can show a VPT - Valor Patrimonial Tributário (fiscal assessed value) - that's completely disconnected from its market price, creating a tax reassessment risk after purchase. It can carry an energy rating that triggers mandatory EPBD renovation obligations the seller hasn't disclosed.

The fragmentation of Portugal's property registry is not a bureaucratic quirk - it's the structural reason why so many buyers discover serious problems only after signing.

A CPCV - Contrato Promessa Compra e Venda (promissory purchase contract) - is legally binding. Once you sign it, you're committed. Walking away typically means forfeiting your deposit, usually 10% of the purchase price. Signing a CPCV on a property that turns out to have a €60,000 legalisation liability or a pending court order is not a situation you can easily unwind.

The buyers who get it wrong aren't careless. They're often buying under time pressure - a competitive Lisbon apartment, an agent saying "there are three other offers on this property." They skip document verification, or they rely on the seller's lawyer to raise any flags. The seller's lawyer works for the seller. That's the conflict you need to protect yourself from.

Due diligence in Portugal works when it's systematic, independent, and completed before you sign the CPCV. Not after. Not during. Before.

What Are the Four Mandatory Documents Every Portuguese Property Buyer Must Check?

The four mandatory documents for property due diligence in Portugal are: the Certidão Permanente (issued by the IRN), the Caderneta Predial Urbana (issued by the AT), the Licença de Utilização (issued by the Câmara Municipal), and the Certificado Energético (issued by ADENE - Agência para a Energia). Each comes from a different authority. Each reveals a different category of risk. All four are required before any legitimate purchase should proceed.

Here is what each document tells you, and what it can hide.

The Certidão Permanente (Land Registry Certificate) - issued by the IRN

The Certidão Permanente is the foundational document of any Portuguese property purchase. It shows who legally owns the property, what encumbrances are attached to it (mortgages, liens, court orders, easements), the property's legal description including area and article number, and the full registration history of every ownership transfer.

You obtain it from the IRN's portal, Predial Online (predialonline.pt), for around €15–€20. It's valid for six months, but for due diligence you want a version issued within the last 30 days - sellers have been known to present certificates that are technically valid but predate a recently registered court action.

What to look for: Any inscrição (inscription) in the encumbrances section requires an explanation. A hipoteca (mortgage) attached to the property doesn't automatically block a sale - it must be discharged at completion using purchase funds. A penhora (seizure order) arising from an unpaid tax debt or court judgment is more serious and can delay or prevent completion. An acção judicial (active court proceeding) means the property's ownership may be legally contested.

Also compare the area stated in the Certidão Permanente against the area in the Caderneta Predial Urbana and the physical property description. Discrepancies - even of a few square metres - are registration anomalies that signal unregistered works somewhere in the property's history.

RealOS reads the Certidão Permanente automatically using OCR document parsing, flags any active encumbrances, identifies area discrepancies, and presents the findings in plain English.

The Caderneta Predial Urbana (Property Tax Record) - issued by AT

The Caderneta Predial Urbana is the AT - Autoridade Tributária e Aduaneira's (Portuguese Tax Authority's) official record of the property. It contains the VPT (Valor Patrimonial Tributário - the fiscal assessed value used to calculate annual IMI), the physical description including registered area, number of rooms, construction year and permitted use, ownership details as recognised by the tax authority, and the IMI payment status.

The VPT matters in two distinct ways. First, if your agreed purchase price significantly exceeds the VPT, the AT can reassess the VPT upward after the sale - which means your annual IMI (Imposto Municipal sobre Imóveis - annual property tax) increases. Second, your IMT - Imposto Municipal sobre Transmissões (property transfer tax) - is calculated on whichever is higher: the declared purchase price or the VPT. Knowing the VPT before you agree a price means you can plan your total acquisition cost accurately.

The physical description in the Caderneta must match the actual property. If the Caderneta says 80m² and the property is 110m², someone has built additional space without updating the tax registration. Under Simplex 2024, that discrepancy is a direct signal of a potential unpermitted works situation - and your liability after signing.

RealOS cross-references the Caderneta Predial Urbana against the Certidão Permanente and the property's stated area, and flags description mismatches as Simplex 2024 risk indicators.

The Licença de Utilização (Occupation License) - issued by the Câmara Municipal

The Licença de Utilização is issued by the Câmara Municipal (municipal council) and confirms that a building has been inspected and approved for the use it was built for - residential, commercial, or mixed. It's one of the most frequently missing or mismatched documents in Portuguese real estate transactions.

Older properties can be exempt from requiring a Licença de Utilização, but the cut-off is not a single national date. It depends on when the RGEU, and later DL 166/70, took effect in that specific município. Some câmaras use 13 August 1951, Coimbra applied 12 May 1962 outside the urban perimeter, and Ovar 1 May 1970 outside Ovar and São João. Confirm the date with the câmara that holds the property, and note that the exemption falls away if significant renovations have been carried out. For any property built after 1951, the absence of a Licença de Utilização requires specific explanation.

What the Licença de Utilização doesn't tell you is equally important. It certifies the property as it was when originally inspected. It says nothing about works carried out after that point. A property whose Licença was issued in 1980 and which has had a terrace enclosed, a loft converted, and a garage turned into a living space since then still has a valid Licença - but the Licença describes a property that no longer corresponds to what physically exists.

Under Simplex 2024 (DL 10/2024), this matters enormously. The licensed description is the benchmark. Everything that exists beyond it is an unpermitted work. And since DL 10/2024, every unpermitted work becomes your legal liability at the Escritura Pública.

The Certificado Energético (Energy Performance Certificate) - issued by ADENE

The Certificado Energético - the energy performance certificate (EPC) is mandatory for all property sales and rentals in Portugal. It's issued by ADENE - Agência para a Energia (national energy agency) - through licensed energy assessors and assigns a rating from A+ (most efficient) to F (least efficient).

This certificate has always mattered. From May 2026, it matters more.

The EPBD Directive 2024/1275 sets binding energy performance obligations for Portugal. For residential properties, the directive establishes national primary energy consumption trajectory targets and introduces the Renovation Passport framework for low-rated buildings. Portugal transposed the directive in part through Decreto-Lei n.º 11/2025, de 25 de fevereiro, which brought in the Passaporte de Renovação, minimum energy performance standards and zero-emission new builds from 2030. The remainder is still pending, and specific per-property sale or rental restriction thresholds for residential buildings have not yet been defined in national law. What is confirmed: properties rated Class F, the lowest class that exists on the current Portuguese SCE scale, carry growing financial risk as banks adjust mortgage terms under EBA guidance, and renovation obligations will tighten as transposition progresses.

A property currently rated Class F is not just an inefficient building. It is a property with documented energy liability. Upgrading a Class F property to Class D costs between €15,000 and €80,000+ depending on size and current condition. For a full breakdown of confirmed EPBD obligations and timelines, see the EPBD compliance Portugal 2026 guide.

For properties with gas installations, the mandatory gas inspection certificate (Boletim de Inspeção under DL 97/2017) is a separate compliance document to verify alongside the Certificado Energético. It is not included in the EPC and requires independent confirmation.

RealOS's AIRCS - Asset Integrity and Regulatory Compliance Score - quantifies your EPBD energy liability before purchase, modelling the retrofit CAPEX based on the property's energy class and size.

How Did Simplex 2024 Change What Buyers Must Verify Before Signing?

Simplex 2024, formally Decreto-Lei 10/2024, transferred full legal and financial liability for unpermitted construction works to the buyer at the moment of signing the Escritura Pública. Before DL 10/2024, liability for obras sem licença (unlicensed works) could sometimes be negotiated or contested. After it, the buyer who signs the escritura owns the problem, completely, immediately, and with no route back.

The scope of what constitutes an unpermitted work is broad: extensions, balcony enclosures, mezzanines, attic conversions, garage conversions, pool additions, outbuilding constructions, additional floors, covered terraces. Any structural addition or modification not licensed by the Câmara Municipal at the time it was built.

Legalisation costs typically run €5,500 to €7,000 for a common illegal construction, with municipal taxas varying by regulamento. For some works, legalisation is not possible at all, and the Câmara Municipal can issue a demolition order requiring removal at the new owner's expense.

What this means for your due diligence process: verify not just that a Licença de Utilização exists, but that the licensed physical description matches what is actually there. RealOS's Reality Gap Score does this cross-check automatically.

For the complete legislative framework, covering what DL 10/2024 changed, the ten-year enforcement window, and the full liability transfer mechanics, see the Simplex Urbanístico guide for buyers.

What Are the Most Common Problems Found During Due Diligence in Portugal?

The four most common problems discovered during Portuguese property due diligence are: active encumbrances on the Certidão Permanente (mortgages or court orders), unpermitted construction works not reflected in the Licença de Utilização, VPT discrepancies that create tax reassessment exposure, and adverse energy class ratings that create EPBD renovation liability. Each carries measurable, quantifiable financial exposure - which is why you verify before signing, not after.

Here is what each problem typically costs when discovered too late:

1. Active encumbrances - hipotecas, penhoras, court actions. The most common is an existing mortgage the seller hasn't yet discharged. This is manageable: the mortgage is paid off at completion from the purchase funds. More serious is a penhora (seizure order) arising from a tax debt or unpaid judgment, or an acção judicial (active court proceeding) relating to ownership. These can delay or block completion for months. Cost when discovered post-CPCV: Legal fees to resolve €2,000–€15,000+, plus schedule disruption and potential deposit forfeiture if deadlines are missed.

2. Unpermitted construction works (obras sem licença). The terrace the seller calls "part of the house" isn't on the licensed floor plan. The converted garage doesn't appear in the Licença de Utilização. The bedroom in the loft has no legal existence. Under Simplex 2024, all of this transfers to you at escritura. Cost: Legalisation fees typically run €5,500 to €7,000 for a common illegal construction, with municipal taxas varying by regulamento. Some works cannot be legalised and require demolition at the new owner's expense.

3. VPT vs. purchase price discrepancy. When your agreed purchase price significantly exceeds the property's VPT - Valor Patrimonial Tributário - the AT - Autoridade Tributária e Aduaneira - can reassess the VPT upward post-sale. A higher VPT raises your annual IMI (Imposto Municipal sobre Imóveis - annual property tax) permanently. It also affects the IMT (property transfer tax) base, since you pay IMT on whichever is higher: declared price or VPT. Cost: Ongoing, typically €300–€2,000+ per year in additional IMI depending on the reassessment magnitude.

4. Energy class liability under the EPBD. Buying a low-rated property in 2026 means buying a renovation project. Portugal transposed the EPBD Directive 2024/1275 in part through DL 11/2025, with the remainder pending and residential renovation obligations tightening as transposition progresses. For a 100m² apartment currently at Class F, upgrading to Class D costs approximately €20,000–€45,000. For a 200m² villa with outdated heating and poor insulation, it can exceed €80,000. Cost: €15,000–€80,000+ in retrofit capital expenditure depending on property size, current energy class, and regional climate zone.

P&A Legal data shows approximately 20% of Portuguese property buyers face unforeseen post-completion costs of 10–25% of the purchase price. Systematic due diligence before the CPCV eliminates almost all of these.

Foreign buyers face compounded exposure across all four categories; the complete guide for foreign buyers covers the additional verification steps specific to non-resident purchasers.

Who Verifies These Documents, and What None of Them Check

No professional in a standard Portuguese purchase compares the licensed description against the building. The seller's lawyer, the notary and the mediador each check paper, and DL 10/2024 removed the municipal check that once sat at the deed.

Buyers assume someone in the chain is doing this work. Ask each participant what they are contracted to do and the picture changes.

The seller's lawyer acts for the seller. That is the engagement, not a comment on anyone's ethics, and it means the person holding the fullest account of the property's history owes you nothing.

The notary confirms the formalities of the escritura: identities, capacity, the wording of the deed, the tax position. Since DL 10/2024 the notary no longer gates the deed on the licença de utilização, so the one moment when a public official looked at the building's licensing status has gone.

The mediador imobiliário holds an IMPIC licence and owes you information duties on what they know. Nothing in that framework obliges an agent to measure a terrace against a floor plan or to ask the câmara for the works history.

Your own lawyer, if you engage one, verifies documents. A good one reads the certidão closely, spots the penhora, checks the caderneta against the price and tells you what the licença says. None of that involves standing in the property with the plan in hand. For the full account of who owes the buyer what, see lawyer, notary, agent: who actually protects the buyer.

Four parties handle the transaction and each one stops at the paper. Portugal has no professional standard that closes the gap either, which is its own problem: see property inspection standards in Portugal for what IMPIC regulates, what it does not, and what an Ordem dos Engenheiros registration actually means.

What the Four Documents Cannot Tell You About the Building

The four documents describe the property as registered. Works carried out after the licença was issued leave no trace on paper, and under DL 10/2024 they become the buyer's liability at the escritura.

Every document covered above records a moment. The certidão records what was registered. The caderneta records what was declared to the AT. The licença records what the câmara approved when it inspected. Buildings change after those moments and the paperwork does not follow.

Three gaps recur.

The licensed description ages. A licença issued in 1980 stays valid while a terrace is enclosed, a loft is converted and a garage becomes a bedroom. Nobody falsified the document, it describes a building that no longer exists in that form. Each of those additions is an obra sem licença, and under Simplex Urbanístico each becomes yours at the escritura, with RJUE exposure for an individual owner running from €498.80 to €99,759.58.

The declared area is not a measured area. A caderneta saying 80m² against a property of 110m² is the clearest paper signal of unlicensed work, and one of the few discrepancies you can catch from documents alone. The reverse case is harder: a mezzanine, an enclosed balcony, a structural wall removed to open a kitchen, none of which move the area figure at all.

Condition appears in no document. Damp behind a wall finish, an electrical installation modified over four decades, a roof at the end of its life. No Portuguese property document records any of it. Damp and electrical deficiencies are the two findings that recur most often, and neither leaves a paper trail to check.

You can score the paper gap before you visit anything. RealOS cross-references the certidão, the caderneta, the licença and available floor plan data against each other and returns a Reality Gap Score from 0 to 10, with its AIRCS compliance component alongside. A score above 6 means the documents already disagree with one another, which is a reason to look at the building rather than a substitute for looking at it. RealOS is the sister platform to InspectOS: it works on the documents, InspectOS works on the property.

Closing the gap means putting an engineer in the property with the licensed plan, and that is the only step in a Portuguese purchase where anyone compares the two. Timing decides how much it is worth. Before the CPCV you can renegotiate or walk. After it you have signed, and the sinal is at risk. The pre-purchase inspection guide sets out the scope, property inspection before signing the CPCV covers the timing and the protective clauses, and what a property condition report contains shows what comes back. For buyers of newly completed property, the new build snagging inspection guide covers the developer equivalent.

The documents disagree with each other more often than buyers expect, and they never describe the building. Set against RJUE exposure reaching €99,759.58 for an individual owner, a survey costs a fraction of the liability it screens for. Book a pre-purchase inspection with InspectOS.

Property Due Diligence Checklist: 23 Things to Verify Before You Sign in Portugal

Complete every item before signing the CPCV. If any item is unresolved, get an answer first.

Legal documents

1. Certidão Permanente obtained - issued within the last 30 days
2. No active encumbrances (hipotecas, penhoras, acções judiciais) on the Certidão Permanente
3. Registered owner name matches the seller's identity exactly
4. Area stated in the Certidão Permanente matches the Caderneta Predial Urbana
5. No co-owners or third-party rights undisclosed by the seller
6. Property registered for habitation use - not commercial or agricultural
7. Caderneta Predial Urbana obtained - current tax year version
8. IMI (Imposto Municipal sobre Imóveis - annual property tax) is up to date, no arrears
9. VPT checked against agreed purchase price - AT reassessment risk assessed
10. Licença de Utilização obtained - or Certificate of Non-Necessity confirmed, with the exemption date checked against that specific município rather than assumed to be 1951
11. Licensed description in Licença de Utilização matches current physical property layout
12. No active demolition order or municipal enforcement action from Câmara Municipal

Physical condition and Simplex 2024 (DL 10/2024)

13. Area in Certidão Permanente matches physical property measurements
14. All extensions, balcony enclosures, and mezzanines appear in the licensed floor plan
15. No visible evidence of unlicensed construction or structural additions. For pre-1983 properties, a structural and seismic inspection Portugal confirms what visual checks cannot
16. RealOS Reality Gap Score checked - score below 6 for comfort to proceed
17. Ficha Técnica de Habitação (technical housing file) present for post-2004 properties
18. Plantas do Imóvel (floor plans) from Câmara Municipal archive reviewed against current layout

Fiscal and energy

19. Certificado Energético obtained - energy class confirmed
20. EPBD renovation liability modelled - Class F properties flagged for retrofit CAPEX
21. IMT (Imposto Municipal sobre Transmissões - property transfer tax) calculated correctly
22. Imposto do Selo (stamp duty, 0.8%) included in total acquisition cost model
23. RealOS AIRCS energy score reviewed - desconto castanho (brown discount) exposure assessed

RealOS automates checks 1–12 and 19–23 from uploaded documents. Items 13–18 are flagged where document discrepancies indicate physical investigation is warranted.

Frequently Asked Questions

What are conveyancing searches, and does Portugal have them?

Not in the British sense. In England and Wales a solicitor orders a defined bundle, local authority, drainage, environmental, and reports back on what came out of it. Portugal has no equivalent bundle and no professional whose default job it is to order one. What exists instead are four separate documents held by three unconnected authorities: the Certidão Permanente at the IRN, the Caderneta Predial at the AT, the Licença de Utilização at the Câmara Municipal, and the Certificado Energético at ADENE. Nobody assembles them for you and nobody cross-checks them against each other. A British buyer waiting to be told what the searches revealed will wait indefinitely.

How long do conveyancing searches take in Portugal?

The question does not map cleanly, because there is no single search process with a turnaround time. The individual documents are fast: a Certidão Permanente is issued online, typically within a day, and a Caderneta Predial can be pulled from the Portal das Finanças immediately. What takes time is the municipal side, where a request to inspect the processo at the Câmara Municipal can take weeks depending on the council, and it is the municipal archive that holds the works history DL 10/2024 made the buyer liable for. Plan the CPCV timetable around that step, not around the registry documents.

What is property due diligence in Portugal and what does it include?

Property due diligence in Portugal is the process of verifying the legal, physical, and fiscal status of a property before signing any contract. It covers four mandatory documents - the Certidão Permanente (land registry), Caderneta Predial Urbana (tax record), Licença de Utilização (occupation license), and Certificado Energético (energy certificate) - plus physical condition cross-checks and Simplex 2024 (DL 10/2024) unpermitted works verification.

When should I complete due diligence, before or after signing the CPCV?

Before signing the CPCV, the Contrato Promessa Compra e Venda (promissory purchase contract). The CPCV is legally binding. Walking away after signing typically means forfeiting your deposit, usually 10% of the purchase price. All document verification and RealOS analysis must be completed before the CPCV is signed, not after. For the full timing framework and protective CPCV clauses, see the property inspection before signing the CPCV guide.

What is the Certidão Permanente and what does it show?

The Certidão Permanente is Portugal's land registry certificate, issued by the IRN - Instituto dos Registos e Notariado. It shows the property's registered owners, all encumbrances (mortgages, liens, court orders), the property's legal area, and the full transaction history. It's the first document to obtain in any Portuguese property purchase. You get it from Predial Online (predialonline.pt) for approximately €15–€20.

What does Simplex 2024 (DL 10/2024) mean for property buyers?

Simplex 2024 - formally Decreto-Lei 10/2024 - means that from the moment you sign the Escritura Pública (notarised deed), you are fully legally responsible for every unpermitted construction on the property, regardless of when it was built or how many previous owners there have been. Legalisation costs typically run €5,500 to €7,000 for a common illegal construction, with municipal taxas varying by regulamento. Some works cannot be legalised at all and may require demolition.

What is the Licença de Utilização and why does it matter?

The Licença de Utilização (occupation license) is issued by the Câmara Municipal and confirms a building was inspected and approved for its intended use. Under Simplex 2024, if the licensed description doesn't match the property's current physical state - because works were carried out without a permit after the license was issued - the buyer inherits full legal liability for those works at the Escritura Pública.

What are the most common problems found during due diligence in Portugal?

The four most common: (1) active encumbrances on the Certidão Permanente - mortgages, seizure orders, or court actions; (2) unpermitted works - extensions, balcony enclosures, mezzanines, or loft conversions without a Licença de Construção; (3) VPT discrepancies - where the fiscal assessed value differs significantly from the purchase price, triggering AT reassessment risk; (4) adverse energy class ratings - creating EPBD renovation exposure under Directive 2024/1275, partially transposed in Portugal by DL 11/2025 with the remainder pending.

What is the VPT and why does it matter when buying property in Portugal?

The VPT - Valor Patrimonial Tributário - is the Portuguese tax authority's official assessed value of a property, used to calculate annual IMI (Imposto Municipal sobre Imóveis). It almost never equals the market price. If your purchase price significantly exceeds the VPT, the AT can reassess it upward post-sale, permanently increasing your annual IMI. Your IMT (Imposto Municipal sobre Transmissões - property transfer tax) is also calculated on whichever is higher: the declared purchase price or the VPT.

What is the Reality Gap Score and why does it matter?

RealOS's Reality Gap Score (0–10) measures the divergence between a property's registered legal state and its likely physical condition, based on cross-analysis of official documents. A score of 0–3 is low risk. A score of 4–6 warrants attention. A score of 7 or above indicates significant divergence and should prompt a physical property inspection before proceeding. It's calculated by cross-referencing the Certidão Permanente, Caderneta Predial, and Licença de Utilização against each other.

Does a Portuguese property lawyer inspect the building?

No. A property lawyer verifies documents and handles the transaction: the CPCV, the escritura, the title transfer. Reading the certidão, spotting a penhora and checking the caderneta against the price are all document work, and none of it involves visiting the property or comparing it against the licensed plan. Since DL 10/2024 the notary no longer checks the licença at the deed either, so no professional in a standard purchase looks at the building unless you instruct one. Lawyer, notary, agent: who actually protects the buyer sets out each role in full.

What is VeriCasa and is it an alternative to RealOS?

VeriCasa is a B2B due diligence tool built for property professionals: estate agents, lawyers, and agencies. Individual buyers cannot sign up directly, because it requires a professional account and operates on a per-credit model. RealOS sets out the full comparison in its VeriCasa alternatives guide. RealOS is built for individual buyers: you sign up and run your own checks, starting with the free tools. They serve different markets.

How much does property due diligence cost in Portugal?

Document costs: Certidão Permanente (€15–20), Caderneta Predial (free via Portal das Finanças), Licença de Utilização (free to request from Câmara Municipal), Certificado Energético (€100–300 if not provided by seller). RealOS automates the analysis of all four documents from the documents you upload. A Portuguese property lawyer charges €200–500/hr for manual verification. Total for a thorough independent check: €300–€1,500 depending on the route you take.

What happens if I find unpermitted works after signing the CPCV?

After signing the CPCV, your leverage drops dramatically. You're committed to the purchase. If you didn't include a specific rescission clause in the CPCV covering the discovery of obras sem licença (unpermitted works), walking away means losing your deposit. Your options are to renegotiate the price (requiring the seller's agreement), proceed and absorb the legalisation cost yourself, or pursue expensive litigation. This is why RealOS and full due diligence must happen before the CPCV - not after.

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Last updated: August 2026. Portuguese property law, tax rates, and EPBD regulations are subject to change. RealOS keeps this guide current. Always verify specific regulations and your personal situation with a qualified Portuguese property lawyer before proceeding.

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