Legalizing Illegal Construction on Mallorca: The Amnesty Window

Legalizing an illegal build on Mallorca: for decades that sounded like a lost cause. Unpermitted extensions, pools and pool houses are close to standard on the island all the same, especially on older fincas in rural areas. The problem surfaces at the latest when you sell: without a permit there is no Cédula de Habitabilidad (the habitability certificate), no solar subsidies, often no bank financing, and a buyer who rightly pushes the price down. Since 2024 there has been a way out: with the Decreto ley 3/2024, the Balearic government opened a time-limited legalization window that also covers buildings on rural land (suelo rústico). This post explains who can use the amnesty, what it costs and why you do not have much time left.

What does fuera de ordenación mean?

In Spanish planning law, fuera de ordenación describes buildings or parts of buildings that were erected without a permit, or deviating from one, and no longer comply with the current planning rules. After the limitation period, the authority can no longer demand demolition, but the property stays in permanent legal limbo: tolerated, but not legal.

That limbo has tangible consequences. For the unpermitted part you get no permits for alterations or extensions, in the worst case not even for substantial repairs. The Cédula de Habitabilidad is refused or issued only for the legal part. Subsidy programs, for example for photovoltaics, require a legal building. And Spanish banks are reluctant to finance properties with significant planning violations, or refuse outright, which drastically shrinks the circle of possible buyers.

The amnesty window: Decreto ley 3/2024

With the Decreto ley 3/2024 of 24 May 2024, the Balearic government created an extraordinary legalization procedure. The Consell de Mallorca approved its application for the island on 18 June 2024. That means: the window runs for three years from publication in the official gazette BOIB, so on Mallorca until summer 2027.

The key points:

• Covered are buildings, extensions, pools and uses on suelo rústico that were erected without a permit or deviating from one.
• The precondition is limitation: the period during which the municipality can demand demolition (in the Balearics usually 8 years after completion) must have expired. Newer illegal builds are excluded.
• The levy is tiered: 10 percent of the material construction value for applications in the first year, 12.5 percent in the second, 15 percent in the third year. Since summer 2026 the top rate applies.
• Partial legalizations are excluded. You cannot legalize just the pool and leave the pool house in limbo. The application must cover all unpermitted parts of the property.
• The project must include improvements: the law demands measures on environment and efficiency, such as a proper wastewater solution instead of a soakaway and improvements to energy efficiency.

In protected zones such as nature reserves, stricter rules apply, up to full exclusion. Whether your plot is affected is what the architect clarifies in the first step.

How the legalization works

Nothing moves without an architect: the procedure requires a complete technical project, as for a new-build application.

This overview shows the rough costs for an unpermitted extension with a construction value of 100,000 EUR:

That sounds like a lot of money. But run the numbers the other way: a legalized property is financeable, insurable, eligible for subsidies and sellable without a price discount. At Mallorca property values, the gain in value clearly exceeds the costs in almost every case. Keep in mind that the legalized floor area will also feed into the IBI property tax in future, because the cadastre office recalculates the value.

Before you buy: how to spot an illegal build

For buyers the amnesty cuts both ways: it makes some problem properties curable, but the cost of the cure belongs in the price negotiation. Before you buy a finca, always check:

1. Pull the cadastre extract: via the Sede Electrónica del Catastro you can see which building areas are officially recorded. A pool that exists on the aerial photo but is missing from the cadastre is a warning sign.
2. Request a nota simple from the land registry: it shows which buildings are registered. Differences between reality, cadastre and land registry are common on Mallorca.
3. Inspect the building file at the town hall: only the municipality knows which permits were actually granted and whether proceedings over planning violations are running.
4. Commission an architect for a planning-law check: a few hundred euros before the purchase save you five-figure surprises afterwards.

More on the whole buying process with notary, lawyer and transaction costs is in our guide to buying property on Mallorca.

Can I still legalize an illegal build after buying?

Yes. The current owner is entitled to apply, even if he did not build it himself. What matters is that the limitation period has expired and the application is filed before the window closes. Many buyers therefore negotiate the legalization costs straight into the purchase price.

What happens if I do nothing?

In the short term usually nothing: time-barred builds are tolerated. But you stay permanently excluded from permits, subsidies and often from financing, and when you sell, the status pushes the price down. Once the window closes in mid-2027, the only current way to change that disappears.

Conclusion

The Balearic amnesty window is a rare chance to cleanly resolve decades-old planning problems on Mallorca. The math is simple: 15 percent of the construction value plus transaction costs, against a property that is once again fully financeable, subsidy-eligible and sellable. If you own an unpermitted extension, pool or pool house, commission an architect for the survey now instead of waiting for the last half year before mid-2027. And if you want to buy, check cadastre, land registry and building file before you sign. Our guide to buying property shows how to do that step by step.