Judicial auctions on the BOE portal: buying property with a cool head

There is an hour, somewhere between dinner and insomnia, when someone opens subastas.boe.es and starts clicking. Apartments in Carolinas, in San Blas, in Pilar de la Horadada. Auction starting prices that look like a typo: 90,000 € for a flat that idealista would list at twice that. Then a small line, almost hidden, appears: existing prior charges and encumbrances. The excitement fades. The real question begins.

The BOE Auction Portal is not a bargain shop window. It is the digital version of the old courtroom hammer, a legal mechanism where a judicial process orders the forced sale of an asset. Real opportunities exist, yes, but filtered through a dense layer of civil law that you need to understand before clicking bid.

What the BOE Auction Portal is

Since Law 19/2015 of 13 July came into force, all judicial and notarial auctions in Spain are held electronically through a single portal: subastas.boe.es, run by the State Agency Boletín Oficial del Estado. The reform replaced the in-person courtroom auction with a 24-hour open procedure, with long windows (minimum 20 calendar days) that allow anyone in the country to participate. Anyone with a digital certificate or Cl@ve identification can register, post the deposit and bid.

The system is radically transparent on paper. Each notice publishes the appraised value, the auction starting price, the known charges, the declared possession status, the deadlines and the responsible court. Reality, as always, is messier than the summary.

How it works, step by step

The ordinary procedure, regulated in articles 643 and following of Law 1/2000 of Civil Procedure, runs like this. The court issues the auction decree and sends it to the Portal. The notice is published in the BOE. From that moment the auction window opens, during which any bidder can place bids. Before bidding, you must constitute an electronic deposit that is held in a Treasury account through the Tax Agency's online services. When the window closes, the highest bid wins, provided it meets the minimum percentages of appraised value set by the Civil Procedure Act. The winning bidder has a fixed period to pay the rest of the price. If they fail to pay, they lose the deposit and the asset is offered to the next best bidder.

On paper it sounds orderly. On the ground it is a long process where a single administrative omission can leave you out or, worse, in but with a huge problem.

What changed with Organic Law 1/2025

On 3 April 2025, Organic Law 1/2025 of 2 January, on efficiency measures for the Public Justice Service, came into force. Among its reforms, three directly affect the auction investor.

• Higher deposit. The deposit required to bid jumps from 5% to 20% of the auction starting value, with a minimum of 1,000 €. The change filters the curious from the serious bidder. A property with a starting price of 100,000 € requires you to lock 20,000 € before placing a single offer.
• Shorter payment period. The successful bidder now has 20 days to pay the rest of the price, down from the previous 40. That is half the time to coordinate mortgage, deed and fund transfer. Bank financing on such a tight clock is hard, so many auction buyers arrive with their own liquidity or pre-approved credit lines.
• Reinforced notice to the debtor. The new regime requires an attempted personal service of the auction decree on the debtor who has not appeared in the proceeding, to strengthen procedural guarantees. For the investor, that means slightly longer processes before the notice goes live.

The traps worth reading twice

The starting price is only the beginning. Before bidding, you have to do the math on three classic risks.

Prior charges: the inheritance that comes with the flat

Articles 668.2 and 670.5 of the Civil Procedure Act state that the successful bidder accepts the survival of charges or encumbrances prior to the annotation that triggered the execution and assumes the in-rem liability arising from them. If the flat carries a live prior mortgage, that mortgage continues to encumber the property. You do not assume the previous owner's personal debt, but the bank can execute against the asset if nobody pays. After the auction, the Court Clerk orders the cancellation of all subsequent charges, but not of the prior ones.

IBI: the invisible debt that has priority

Real Estate Tax (IBI) debts for the current and previous year carry a preferential real charge: the city council can collect against the asset before any other creditor, even before the bank that executed the mortgage. A flat with two years of unpaid IBI can add thousands of euros to the real cost of the operation. It is worth requesting a certificate from the Ayuntamiento de Alicante, or whichever municipality applies, before bidding.

Occupants: the most unpredictable risk

Article 661 of the Civil Procedure Act requires the court to notify any occupants other than the debtor so that they can produce title within ten days. Reality is uneven. Sometimes the possession status is clear before the auction, sometimes it is not. Finding a tenant with a lease predating the mortgage, or a person occupying without title who has been there for more than a year, can stretch the eviction by months. A prior viewing of the property is usually impossible, so you buy trusting the photographs in the file and the declared possession status.

Alicante: an active market, not an easy one

The province of Alicante has been among the most active in electronic judicial auctions for years. The concentration of second homes, mortgages granted during the expansive cycle prior to 2008 and the accumulated workload of courts in Torrevieja, Alicante, Orihuela and Dénia explain the volume. At any moment the Portal lists hundreds of active properties in the province, from parking spaces in El Campello to detached houses on the Costa Norte.

That does not mean they are bargains. The apparent discount over market value dilutes quickly once you add known charges, unpaid IBI, community fees, possible eviction proceedings, full renovation and the corresponding transfer taxes. Real return, honestly calculated, usually sits below what the press specialised in opportunities tends to advertise.

Before you bid, three mandatory exercises

If the idea still stands, there are three checks worth doing every time, ideally with a lawyer specialised in auctions and a tax advisor:

1. Updated nota simple from the corresponding Land Registry, to confirm prior and subsequent charges.
2. Debt certificate from the Ayuntamiento (IBI, waste, pending plusvalía where applicable) and from the homeowners' community.
3. Analysis of the possession status: who lives there, under what title, since when, with what risk of an eviction process.

An auction is not bought at the price displayed in the BOE. It is bought at that price plus every layer the file reveals, and the ones it does not.

A cool head wins

The BOE Auction Portal is a legitimate tool and, in prepared hands, can generate real opportunities. But it demands technical knowledge, available liquidity and tolerance for time. The fantasy of a flat at half price falls apart quickly once the full account is done.

For someone looking for their first home on the Costa Blanca, the traditional market offers more room to visit, more possession certainty and a predictability the auction does not guarantee. For the experienced investor, auctions are one piece of a diversified portfolio, not a shortcut.

If you would rather compare real options on the traditional market without going through the uncertainty of an auction, you can explore our properties or contact us to talk it through with a cool head.