The villa looks right. The photographs are honest, the location is correct, the price is within range. None of that is the point yet. What matters at this stage is whether the legal reality of the property matches its physical and commercial presentation — and in Marbella, that alignment is tested document by document before any serious negotiation begins.
Spanish property law places the burden of verification squarely on the buyer. The vendor is not required to volunteer problems; the system assumes a competent buyer will find them. An independent abogado — not the agent's recommended lawyer, not a shared lawyer, your own — runs the process. What follows is an account of what that process covers and where it most commonly surfaces problems.
The Nota Simple
The first document is the nota simple, requested from the Registro de la Propiedad. It is the definitive public record of title: who owns the property, how they own it, and what charges or encumbrances are registered against it. Mortgages appear here. Easements appear here. If a neighbour has a registered right of way across the terrace, the nota simple will show it.
The nota simple is not a guarantee of title — Spanish law does not work that way — but it is the foundation of every other check. An abogado reads it not only for what appears but for what is absent. A property that has changed hands several times in a short period warrants closer attention than one with a long, clean ownership history.
The Catastral Certificate and the Footprint Problem
The catastral certificate comes from the Dirección General del Catastro, a separate registry from the land registry. Where the nota simple establishes legal ownership, the catastral record establishes the physical and fiscal footprint: the plot boundary, the built surface area, and the description of structures on it.
The most common finding in Marbella due diligence is a discrepancy between the legally registered footprint and what has actually been built. A pool added without licence, a terrace enclosed into habitable space, a guest cottage constructed informally — these are extensions that exist physically but are absent from the legal record. When the catastral certificate describes 380 m² and the property clearly contains 520 m², that gap requires explanation and usually resolution before contracts proceed.
In the upper Marbella market — Sierra Blanca, Cascada de Camoján, La Zagaleta — these discrepancies often originate from works carried out by previous owners who either did not seek planning consent or could not obtain retrospective legalisation. The abogado must establish whether the discrepancy is repairable, how long legalisation would take, and who bears the cost. Occasionally the situation is irreparable — where works breach the zona de influencia del litoral or protected hillside regulations — in which case the buyer is inheriting a liability, not an asset.
Licencia de Primera Ocupación
The licencia de primera ocupación, issued by the Ayuntamiento, confirms that the property was built in conformity with its granted planning permission and is legally habitable. Without it, the property cannot be connected to municipal utilities in its own right, cannot be registered for a tourist licence, and — critically — may be difficult to mortgage or insure.
In Marbella, the history of the licencia is sometimes complicated. Properties built during periods of irregular planning practice in the 1980s and 1990s may have licencias that were granted under circumstances later subject to legal challenge. The abogado verifies not only that the licencia exists but that it remains valid and unchallenged. For newer builds, the licencia de primera ocupación is issued at practical completion; for a resale, confirming its existence is a routine step that nonetheless occasionally surfaces the absence of one.
Habitability, IBI, and Community Charges
The cédula de habitabilidad applies primarily in certain autonomous communities and confirms that the property meets basic habitability standards. In Andalucía its relevance varies by municipality, but the abogado will confirm whether it is required and, if so, that it is current.
IBI — the Impuesto sobre Bienes Inmuebles — is the annual municipal property tax. The abogado requests the last several years of IBI receipts to confirm the seller is current. An outstanding IBI debt attaches to the property, not the person; a buyer who completes without checking can inherit arrears from a vendor they will never deal with again.
The comunidad de propietarios certificate, issued by the community administrator, confirms that the property carries no unpaid community charges. In gated developments — which describes most of the premium Marbella register — community fees cover security, gardening, maintenance of shared infrastructure and, in some cases, private road upkeep. Arrears follow the property in the same way IBI debts do. This certificate is straightforward to obtain and always worth requesting.
The Energy Efficiency Certificate
Spain requires an energy efficiency certificate for any property being sold or let. It rates the building from A to G across consumption and emissions, and its presence is a legal requirement rather than a discretionary disclosure. In practice, a G rating on an older villa is not unusual and does not prevent the transaction; what matters is that the certificate exists, is current, and has been registered with the Agencia Andaluza de la Energía.
Buyers focusing on the Golden Mile or Sierra Blanca who intend to retrofit — improving insulation, replacing HVAC, installing solar — will find the certificate a useful baseline, though any renovation scope needs to be factored into the acquisition economics separately.
Tax Exposure and the Abogado's Scope
The acquisition itself carries tax costs that vary by buyer profile — resident or non-resident, individual or corporate, new build or resale — and these sit outside the document checklist but cannot be separated from the overall financial picture. On a resale villa at €4M, the Impuesto de Transmisiones Patrimoniales alone is material; combined with notary, registration, and advisory fees, total acquisition costs in Andalucía typically run to 10–12% of the purchase price.
We are not your tax adviser. This sets out the contour; specifics need a cross-border specialist. The structuring question — personal acquisition versus a Spanish SL or a foreign holding company — has implications for annual ownership costs, eventual sale, and inheritance that are entirely specific to the buyer's existing domicile, residency position, and estate plan. The [Spanish property tax landscape for 2026](/guides/spanish-property-tax-2026) has shifted enough in recent years that advice obtained even two years ago may be materially out of date.
The abogado's scope, properly defined, covers the title and regulatory checks described above. Tax structuring is a separate instruction, typically to a firm with both Spanish and the buyer's home-country expertise. The two appointments are not interchangeable.
Timing and Off-Market Considerations
For properties at the upper end of the Marbella market, due diligence operates under a different time pressure than in more liquid segments. Off-market share across the upper register has risen from roughly 30% in 2018 to around 48% in 2025. A vendor willing to sell quietly is often a vendor with a shorter window and less patience for a slow process.
In La Zagaleta, where the off-market share runs to 62% and secondary trades in 2025 numbered 23 across a 230-residence estate, the gap between identifying an opportunity and losing it to another buyer can be measured in days rather than weeks. That compression does not make due diligence optional — it makes it more important that the abogado is already appointed, already briefed, and already capable of moving at the pace the vendor expects.
The nota simple can be obtained within 24 hours. The catastral certificate typically follows within two or three working days. The licencia and community certificate require contact with the Ayuntamiento and the administrator respectively, and those timelines vary. A realistic full review, conducted without delays, runs to two or three weeks. Buyers who treat legal due diligence as something to organise after agreeing heads of terms — rather than before — create unnecessary pressure on the process and occasionally find that pressure is exploited.
What the Process Actually Tells You
Due diligence on a Marbella villa does not answer every question about the asset. It does not value the property, assess the quality of construction, or predict the neighbourhood's trajectory. What it does is establish the legal foundation: whether title is clean, whether the built reality matches the registered record, whether the property can be occupied lawfully, and whether the seller is handing over an asset free of undisclosed liabilities.
Most transactions proceed. The documents are in order, the footprint matches, the licencia is valid, and completion follows. But the value of the process lies precisely in the minority of cases where it surfaces something — a registered encumbrance the vendor had not mentioned, an extension that exists outside planning law, a community debt that would otherwise transfer silently. In those cases, having an abogado who has already read the documents carefully is the difference between a renegotiation and a mistake that closes.