Buying Property in Spain: Why Due Diligence Is Non-Negotiable

Spain’s property law operates on a deceptively simple principle: debts follow the property, not the person. This means that whatever liabilities the previous owner accrued — unpaid community fees, tax arrears, planning violations — become your problem the moment you take title. Foreign buyers, unfamiliar with Spanish bureaucracy and often unable to read Spanish legal documents, are particularly exposed.

A qualified independent Spanish lawyer (abogado) is not optional — it is your single most important investment before any purchase. Their fees are typically 1% of the purchase price and are 100% tax-deductible on selling. Everything else in this guide flows from that starting point.

Buying Property in Spain: The 10 Things You Must Check

1. Verify the Seller Is the Legal Owner

This sounds obvious. It isn’t. A surprisingly common situation in Spain is a property being sold by an heir who has not yet completed the title registration following the death of the actual registered owner. Only deal with someone who appears as the registered title holder at the Land Registry (Registro de la Propiedad). Your lawyer will pull the nota simple — a Land Registry extract — to confirm this before any contracts are signed.

2. Hire Independent Legal Representation

Banks and notaries in Spain are neutral officials. They verify that documents are legally correct — they do not protect your interests. A notary will allow a transaction to proceed even if it is financially catastrophic for the buyer, as long as the paperwork is in order. Your independent abogado is the only person in the transaction whose job is exclusively to protect you. Hire one before you sign anything, including reservation agreements.

3. Uncover All Hidden Debts — Beyond the Nota Simple

The nota simple only shows debts registered at the Land Registry. Several significant liabilities do not appear there at all. Your lawyer must investigate each of the following independently:

4. Check the Community of Owners’ Rules

Every apartment building and many urbanisations in Spain are governed by a community of owners (comunidad de propietarios). Before you buy, request the community’s statutes, meeting minutes from the last 3 years, and current fee schedule. Why? Because communities now have the legal power to ban holiday lets, short-term rentals, and other uses — even if you bought specifically intending to rent the property out. If you are buying as an investment, this check is critical.

5. Inspect for Illegal Building Extensions

Sellers often enclose terraces, build extensions, or add rooms without the required planning permission from the town hall (ayuntamiento). As the new owner, you inherit full liability for any unauthorised construction — including the cost of demolition and any fines. This matters acutely for mortgage financing: if a bank’s property surveyor (tasador) identifies illegal extensions during the appraisal, the bank will refuse to finance the purchase. Your pool of buyers on resale also shrinks to cash-only, which can cost you years and significant price discounts.

6. Check for Military Zone Restrictions

This is a risk most buyers — and many estate agents — never mention. Spain has legally designated areas around military installations, strategic infrastructure, and border zones where non-EU foreigners require written permission from the Military Authority before registering a property in their name. The process takes approximately one year. If permission is refused, you cannot register the property — even after completing the purchase and paying your taxes. You would own nothing provable. Only your lawyer can identify whether a property is in one of these zones before you commit.

7. Understand Spain’s Coastal Law (Ley de Costas)

A property sitting metres from a beautiful beach may be legally precarious. Spain’s Coastal Law establishes a 100-metre protection zone from the shoreline (reducible to 20m or extendable to 200m depending on the area) within which planning authorities can order demolition of structures — even those decades old. The fact that a property has existed for 30 years provides no protection if it falls within the maritime-terrestrial public domain.

8. Get the Energy Performance Certificate (EPC)

Every property sold in Spain must have a valid Certificado de Eficiencia Energética — the Spanish equivalent of an EPC. This is not just a legal requirement; it is becoming a financial one. EU regulations coming into force mean:

• From 2030: Properties rated E or lower cannot be sold or rented.
• From 2033: The ban extends to properties rated D.
• An estimated 80% of Spanish properties currently sit at rating E or lower.

If you are buying a property with a low EPC rating, factor in the cost of improvement works into your purchase price negotiation — or your long-term hold becomes a liability, not an asset.

9. Understand the Full Buying Costs — Not Just the Price Tag

This is one Idealista didn’t cover — and it catches out buyers every year. The purchase price is only part of what you will pay. Budget an additional 10–15% on top of the agreed price to cover all acquisition costs:

10. Understand the Non-Resident Mortgage Process Before You Start Searching

The second thing Idealista missed — and the most commercially important one. Most foreign buyers start searching for property before they know what they can actually borrow. This creates two problems: you may fall in love with a property you cannot finance, or you may miss out on a property because you haven’t arranged your mortgage pre-approval and another buyer moves faster.

This post is for informational purposes only and does not constitute legal or financial advice. Always consult a qualified Spanish lawyer (abogado) and a regulated mortgage broker before proceeding with a property purchase in Spain. For official Spanish government information on property transactions, see the Agencia Tributaria.