How do you check the legal status of a property in Spain in 2026?

The legal status of a property in Spain is checked on the basis of documents, not the seller's assurances. The starting point is the Nota Simple from the property register, and a full check also covers the IBI, certificates of no arrears, the documents of the community of owners, Catastro data, the legality of occupancy and the energy certificate. It is worth checking all of this before you sign the reservation agreement or a private contract.

Why is checking the legal status of a property so important?

Buying property in Spain is not just about location, views or the standard of finish. The safety of the transaction is determined by what you cannot see in the photos: the legal status. It decides whether you are buying safely or taking on someone else's problems.

In 2026 the procedures are more transparent than they used to be, but you cannot act on trust. Only the documents show whether the property really belongs to the seller and whether it is free of a mortgage, an attachment order, debts to the community or tax arrears. There may also be discrepancies between the actual state of the property and the documentation.

Foreign buyers often focus on price, location, taxes and purchase costs, and pay too little attention to the documents. That is a mistake, because this is exactly the stage at which issues emerge that later cost money, time and stress.

Key takeaways:

• The sale listing alone says nothing about the real legal status of the property.
• The most important document to start with is the Nota Simple, but it is not enough on its own.
• You also need to check the IBI, the community of owners, the cadastral data and the legality of occupancy.
• Particular caution is needed on the resale market.
• A safe purchase is based on documents, not on the seller's declarations.

What is a Nota Simple and what can you read in it?

The Nota Simple is the basic document from the Spanish property register and the first one you should ask for. It lets you make a preliminary assessment of whether the seller has the right to sell the property and whether it has any visible legal problems.

In a Nota Simple you will most often find:

• the details of the owner or co-owners,
• the type of property and the description of the unit or plot,
• the register number and the floor area entered in the register,
• the type of right to the property,
• share in the common areas,
• mortgage charges, attachment orders, easements, usufruct and other third-party rights or legal restrictions.

The biggest mistake is to check only the address and the owner's name. You need to read the whole document. If the seller does not want to provide a current Nota Simple, that is a warning sign.

Nota Simple versus register certificate – what is the difference?

• The Nota Simple is informational in nature. It serves for quick and effective verification at the outset, but it does not carry the weight of an official document.
• A register certificate is an official document that formally confirms the content of the entries in the register.

In a standard purchase you start with the Nota Simple. If doubts arise or the legal situation is more complicated, it is worth obtaining a register certificate.

How should you understand charges: mortgage, attachment order, usufruct and easements?

Every charge visible in the Nota Simple must be analysed carefully. Most often you will come across a mortgage, an attachment order, usufruct, easements and restrictions on third-party rights.

The most common mistake is to assume: "the mortgage was repaid, so it no longer exists". That does not work automatically. A repaid mortgage may still appear in the register if it has not been formally cancelled. If you see a mortgage, establish:

• whether any debt still exists,
• whether the loan has been repaid,
• whether the entry has been formally cancelled,
• how it will be settled on the sale.

An attachment order (embargo) is a warning sign. It means a seizure linked to a debt or proceedings and always needs to be clarified thoroughly before buying.

Which documents do you need to check besides the Nota Simple?

The Nota Simple is a starting point, not a full check of the legal status. A real picture of the property comes only with the complete set of documents.

IBI – the local property tax

For the buyer, what matters is not only the amount of the IBI, but above all whether the tax has been paid. A property may have arrears owed to the municipality that the buyer does not know about. Ask for the latest IBI bill, proof of payment and, if applicable, a certificate of no arrears. Check whether:

• the bill is up to date and paid,
• the property details match,
• there are no arrears from previous periods.

The IBI also helps verify that the data in the documents is consistent. On the resale market it is an absolute basic.

Certificate of no arrears

It confirms that there are no arrears owed to the relevant authority in respect of the property or the owner, and reduces the risk of unsettled obligations coming to light after the purchase. It is especially important when the property has been unused for a long time, the owner has had financial problems, the property comes from an inheritance, there are several co-owners, or you are buying on the resale market.

Certificate from the community of owners

For an apartment, flat or house in a development with shared infrastructure, you need to check that the seller is not in arrears to the community. This is one of the most frequently overlooked elements. The document should clearly state:

• whether there are arrears and how much they amount to,
• whether additional charges have been approved,
• whether higher community costs are planned.

In older buildings, holiday developments and complexes with a pool, gym or security, these costs can be significant.

Catastro data

The Catastro contains descriptive and graphic information about the property. It is worth comparing the data from the property register with the cadastral data in terms of area, location, plot boundaries, the description of the building and the unit's conformity with the documentation. Discrepancies do occur: a different terrace, an inconsistent area, an outdated description of the building. This does not always spell disaster, but it always needs to be clarified before buying.

Legality of occupancy

Depending on the type of property and the region, the following may matter: the occupancy licence, the first occupation document, the cédula de habitabilidad, completion documents for a new development, and conformity with permits and documentation. The absence of the proper document may mean problems with living in the property, letting it, connecting utilities, insuring it and selling it later.

Energy certificate

It shows the energy class, the level of efficiency and indicative parameters affecting running costs. Poor energy efficiency means higher costs for air conditioning, heating and everyday use, and in Spain air conditioning in summer is standard. The absence of a certificate is also sometimes a sign that the sales documentation has not been properly prepared.

Valor de referencia

The reference value does not determine the legal status, but it matters for tax purposes: it may affect the value on which some taxes are calculated when buying on the resale market. It is worth knowing even if the price seems attractive, to avoid a surprise after the transaction.

List of documents worth having before signing the contract

New-build versus resale market – what should you check differently?

New-build market. With a new property the emphasis is on the developer's documentation, permits and completion approvals, occupancy documents, the unit's conformity with the plans, and the way the property is handed over.

Resale market. Particularly important are a current Nota Simple, the IBI, arrears owed to the community, consistency of the data with the Catastro, the history of charges and the legality of alterations. It is the resale market that more often carries the risk of hidden problems.

Examples of new-build properties from our listings

Apartment 50 metres from the beach – Altea, from 104.70 m², 2 rooms, 2 bathrooms, from €465000 (price excludes VAT).

Penthouse 50 metres from the beach – Altea, from 90.85 m², 1 room, 2 bathrooms, from €490000 (price excludes VAT).

Villa in Altea – from 470 m², 5 rooms, 6 bathrooms, sea view, private pool, from €5900000 (price excludes VAT).

Villa with a pool and sea view – Altea, from 405.29 m², 4 rooms, 5 bathrooms, from €1986600 (price excludes VAT).

How do you check the legal status of a property step by step?

1. Ask for the basic details of the property: the address, the owner's details, information identifying the property, the latest IBI bill and information about the community.
2. Order a current Nota Simple – it shows the owner and the charges.
3. Compare the data with the Catastro – area, description, location and plot.
4. Verify the IBI and any arrears – the bill alone is not enough, you need to check that everything has been settled.
5. Ask for the community certificate – a mandatory element for apartments and properties with common areas.
6. Check the legality of occupancy – whether the property can legally be lived in or used.
7. Verify the energy certificate – part of the complete documentation.
8. Make sure everything is settled before the notary – charges and costs to be paid off must be clearly settled before the deed is signed.

The most common risks when buying property in Spain

• The mortgage still appears in the register – even if the seller claims to have repaid it, the entry has to be formally clarified.
• The documents do not match reality – the area, terrace, plot or layout may differ from the recorded data.
• The owner owes money to the community – without a certificate from the community you do not have the full picture.
• Tax arrears – the seller's assurance is not enough, documents are what count.
• No proper occupancy document – this may mean problems with using, letting and reselling the property.

A properly carried-out check gives the buyer security and real control over the transaction – whether they are buying an apartment, a house or an investment on the Costa Blanca, the Costa del Sol or in another region of Spain. The substantive basis of the text was verified against official Spanish sources on the property register, the cadastre, communities of owners and energy certification.

Frequently asked questions

Aria Spain, a licensed agency entered in the RAICV register under no. 4123, sells new properties from developers with no commission for the buyer and guides the client in English through the entire process – from the NIE number and mortgage to the visit to the notary and handover. Book a free consultation.