Urban Planning Crimes: Illegal Construction Defence in Spain

In Spain, Urban Planning Crimes (Delitos Urbanísticos) are taken very seriously, especially in coastal areas and protected lands. Under Article 319 of the Criminal Code, illegal construction can result in prison sentences of 1 to 3 years (up to 4 years on specially protected land) and, most fearfully, the demolition of the property.

These cases typically begin with an inspection report or a complaint, followed by criminal proceedings against those responsible for the works. The early phase is decisive: the classification of the land, the completion date and the possibility of legalization should be documented before positions harden.

When is Illegal Construction a Crime?

Not every zoning infraction is a crime. For a criminal conviction, the construction must cause serious harm to spatial planning. Minor infractions should be handled administratively (fines), not in criminal court. Our defence strategy often focuses on proving the "lack of significant impact" or the potential for legalization of the works.

Case law requires an added layer of wrongfulness beyond the administrative infraction: the construction must seriously harm the legally protected interest of land planning. Where the works can be legalized under current planning rules, or their impact is minimal, the defence should fight to keep the case in the administrative arena, where the outcome is a fine rather than a criminal record.

Who Can Be Held Liable

The offence targets developers, builders and the technical directors of the works. Private individuals who build on their own land can also be prosecuted as self-developers, which is in fact the most common scenario in rural and coastal areas. Liability requires knowledge of the unlawful nature of the construction: reliance on licenses that appeared valid, or on professional advice, can be central to the defence.

The Risk of Demolition

Judges can order the demolition of illegal works at the owner's expense. However, this is not automatic. The principle of proportionality applies. If the property is your primary residence or if the infraction is minor, we fight to save the building, arguing that demolition would be an excessive penalty.

Courts weigh the seriousness of the infraction, the degree of consolidation of the works, the time elapsed and whether third parties acting in good faith would be affected. Demolition is ordered at the owner's expense, so avoiding it is often the single most valuable outcome the defence can secure, even where a conviction cannot be entirely avoided.

Defence Strategies

• Legalization: demonstrating that the works are compatible with current planning rules or can be regularized.
• Lack of serious harm: expert evidence showing minimal impact on the values protected by spatial planning.
• Classification of the land: challenging whether the land was genuinely protected or non-developable at the time of construction.
• Completion date: proving when the works were actually finished, which determines the limitation defence described below.