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Construction, extensions, pools, use changes and subdivisions in Spain require planning and technical review before work begins. Registry or cadastral description does not prove that a building is lawful.
Planning classification and permitted use
Municipal and regional plans determine land classification, buildability, setbacks, height, protected status and permitted use.
Rural, coastal, protected or community property can face additional sector restrictions.
Licences, technical project and works
Major works normally require a technical project, building licence, site supervision and completion documentation; minor works follow local rules.
A licence does not excuse departures from the approved project and contractor or architect responsibilities remain separate.
Documents and checks
Planning certificates, licence file, project, completion certificates, registry and cadastral history should be compared.
Planning certificate and zoning information
Building and works licences
Technical project and certificates
Registry and cadastral records
Sanction or legalisation file
Unauthorised works and legalisation
Unauthorised works may be legalisable only if current planning permits them; limitation of enforcement does not automatically make them lawful.
Older construction may sometimes be documented by age for registry purposes, subject to planning and land-category restrictions.
Risks and next steps
Buying because a pool or extension appears in Catastro can leave the owner with fines, inability to register or future sale problems.
Regional and municipal rules, contractual wording and the property's registry and planning history can change the result. We verify the current file before any payment, signature or enforcement step.
Useful official resources
Official requirements, fees and procedures can change. The competent authority and current rules are checked for each individual case.
Questions about Planning and Construction Law in Spain
Does Catastro prove a building is legal?
No. It is primarily an administrative and tax record.
Can old illegal works be legalised?
Only after checking current planning, land status and enforcement limitation.
Is a declaración de obra nueva a licence?
No. It is a notarial and registry declaration supported by legal and technical evidence.
Can the municipality order demolition?
Yes in qualifying planning-enforcement cases, subject to procedure and defences.
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Important: This page provides general information and does not replace individual legal, tax, labour, medical or technical advice. Authorities decide applications and disputes independently. Requirements and practice may change.