Illegal buildings in Mallorca: unlicensed works and what buyers must check

Why illegal works affect the buyer

In Spanish planning law the property is bound by its planning situation. A demolition order can be enforced against the new owner, sanction proceedings can continue after the sale, and illegal works can prevent mortgages, insurance and holiday rentals. When you sell, they reduce the value and put buyers off.

Typical illegal works in Mallorca

• Pools that were never licensed.
• Extensions and extra bedrooms.
• Outbuildings (garage, stable, store) converted into living space.
• Roofed terraces and pergolas used as living space.
• Roof terraces and extra floors.
• Walls and paths on rustic land.

How a lawyer detects them

The lawyer compares reality with three sources: the land registry, the cadastre and the town hall's licence file (applications, licences, completion certificates and open proceedings). An architect often adds a technical report and aerial photographs from different years showing when each building appeared. See property due diligence.

Time limits: when is an illegal work "safe"?

On urban land, many infringements can no longer be pursued with demolition after a time limit. The building is then usually fuera de ordenación (out of planning): it can only be renovated in a limited way and cannot be extended. On protected rustic land many infringements are never time-barred. In 2024 the Balearic Islands introduced a temporary procedure to legalise certain buildings on rustic land against payment; whether a case qualifies must be checked. See planning lawyer.

What to do if unlicensed works are found

• Negotiate the price to reflect the risk.
• Legalise before completion, at the seller's initiative.
• Retention of part of the price until legalisation.
• Remove the works, sometimes the simplest solution.
• Walk away if there is a demolition procedure or a serious infringement on protected land.

Sellers are affected too

Owners with unlicensed extensions who plan to sell should check early whether legalisation is possible. Buyers, banks and notaries look at the planning situation more and more, and a property with a clear position sells faster and for a better price. Honest disclosure also reduces the risk of later claims. See selling property in Mallorca.

How long does legalisation take?

Simple cases on urban land can take a few months; procedures on rustic land involving the Consell de Mallorca often take much longer. Plan the timetable realistically and protect it in the contract.

Castell.law is the English and German-speaking practice of Castell Abogados, a law firm in Palma de Mallorca. This page is general information, not advice on a specific case: laws and procedures change, so check your situation with us before acting.