Due Diligence for Resale Property in Spain (2026 Buyer Guide)

Buying a resale property in Spain can be an excellent decision — but it also comes with legal risks that are not always obvious at first glance. Unlike in some other countries, there is no automatic system in Spain that guarantees a property is free from debts, planning issues, or legal defects just because it is being sold through an estate agent or signed at a notary.This is where proper legal due diligence becomes critical. Due diligence is the process your independent property lawyer carries out to verify that the property you are buying is legally safe, correctly registered, and does not come with hidden liabilities that could cost you time, money, or even your ownership rights after completion.At Platinum Legal Spain, we treat due diligence as the foundation of every resale purchase. Before you commit to a reservation deposit or sign any arras contract, we carry out a structured series of legal checks to make sure you know exactly what you are buying — and what you are not. Resale due diligence is especially important for foreign buyers, remote purchasers, and anyone buying older properties, villas, apartments with extensions, or homes within a Community of Owners.This guide explains the exact checks your lawyer should perform, the risks we see most often in resale purchases, and how to protect yourself before paying a deposit.

Ownership and Land Registry Checks

The first step in resale due diligence is confirming that the seller is legally entitled to sell the property. This is done through a detailed review of the Spanish Land Registry (Registro de la Propiedad).

Your lawyer must verify that:

• ✔️ The registered owner matches the seller signing the contracts
• ✔️ The property description matches what is being sold (size, boundaries, storage, parking)
• ✔️ There are no undisclosed co-owners, inheritance issues or usufruct rights

Discrepancies between the Land Registry, the Catastro, and the physical property are common — especially in older properties and villas — and must be resolved before completion.

Debts, Mortgages and Charges

In Spain, many property-related debts follow the property rather than the owner. If they are not cleared correctly, the buyer can inherit them.

As part of due diligence, we check for:

• ✔️ Outstanding mortgages or loans secured against the property
• ✔️ Embargoes, court charges or tax debts
• ✔️ Unpaid local taxes such as IBI
• ✔️ Community of Owners debts

Any existing mortgage must be formally cancelled at the notary on completion. Community debts must be certified as fully paid. Without these checks, buyers can face unexpected bills after purchase.

Planning, Licences and Building Compliance

Planning issues are one of the most common — and most expensive — problems we uncover in resale transactions.

Depending on the property type, your lawyer should check:

• ✔️ Original building licences and habitation certificates
• ✔️ Whether extensions, terraces, pools or garages are legal
• ✔️ If the property complies with local urban planning rules
• ✔️ Whether any planning sanctions or enforcement actions exist

Illegal works may require legalisation, payment of fines, or in serious cases removal. Some risks are manageable; others are not — and the safest option can be to walk away before you lose your deposit.

Community of Owners Checks

If the property forms part of a Community of Owners (apartments, urbanisations, golf resorts), additional checks are essential.

We review:

• ✔️ Confirmation that all community fees are fully paid
• ✔️ Community statutes and internal rules
• ✔️ Planned extraordinary expenses or disputes

Community debts and special assessments can pass to the buyer if not handled correctly at completion.

Utilities, Practical Issues and Occupancy

Legal due diligence also covers the practical side of ownership. Before completion, we check:

• ✔️ Electricity, water and gas connections are legally contracted
• ✔️ No unpaid utility bills exist
• ✔️ The property is vacant or legally occupied
• ✔️ There are no rental or occupation rights affecting possession

These checks are particularly important for inherited properties, long-empty homes, and properties sold by non-resident owners.

Protecting Your Deposit During Due Diligence

One of the biggest risks for buyers is paying a reservation deposit before proper checks are completed.

A well-drafted reservation or arras contract should:

• ✔️ Keep the deposit proportionate
• ✔️ Include clear exit clauses linked to due diligence findings
• ✔️ Allow recovery of funds if serious legal issues are discovered

This is why we strongly advise involving your lawyer before any money changes hands. You can read more about this in our guide: Reservation Contracts in Spain – Are They Legally Binding?

How Platinum Legal Spain Helps Buyers

We act exclusively in your interests as an independent legal team. For resale purchases, our service includes:

• ✔️ Full legal due diligence before you commit
• ✔️ Clear written reports explaining risks in plain English
• ✔️ Contract review and negotiation
• ✔️ Power of Attorney for remote buyers
• ✔️ Notary coordination, registration and post-completion support

If you’re buying remotely, our Power of Attorney service allows us to complete the process securely without you travelling to Spain.

📞 Spain: +34 868 480 646
📞 UK: +44 203 603 8635
📱 WhatsApp: +34 659 111 210
✉️ Email: info@platinumlegalspain.com

We’ll review your situation and outline the safest next steps before you commit.