Legalization of house extensions: deadlines and procedures

Legalization of house extensions: deadlines and procedures

Legalization of house extensions: deadlines and procedures

Procedures and Times: Regularizing Home Extensions

We know how important it is to stay up to date on legal issues, especially when it comes to our properties. Therefore, today we want to talk to you about the legalization of house extensions in Spain and the deadlines that we must take into account.

First of all, it is essential to understand that any structural modification to a home must be properly legalized to avoid future problems. This includes everything from building a new room to expanding a kitchen or living room.


Obtaining a Building Permit: Before starting any expansion, it is necessary to request a building permit from the corresponding town hall. This procedure is essential and must be approved before starting construction.

Technical Project: An architect or engineer must prepare a detailed technical project that includes the plans for the expansion and a description of the materials to be used.

Start of Works: With the permit in hand, the expansion works can begin. It is crucial to follow the technical project to the letter to avoid future legal problems.

Completion of Works: Once the expansion is completed, it is necessary to request an inspection to verify that everything has been carried out according to the approved project.

Certificate of Completion of Work: With the satisfactory inspection, the certificate of completion of work is obtained, an essential document for the next step.

Public Deed: The extension must be reflected in a public deed before a notary. This step is essential to legally formalize the modification.

Terms and Payments:

Building Permit Application: This process can take several weeks, depending on the city council and the complexity of the project.

Preparation of the Technical Project: Between 2 and 4 weeks, depending on the size and complexity of the expansion.

Extension Works: The term will depend on the size and characteristics of the construction, but can vary from months to a year.

Completion of Works and Inspection: This process can take between 1 and 2 weeks.

Obtaining the Public Deed: Once the certificate of completion of the work has been obtained, the public deed can be carried out. This process usually takes around 2 weeks.

It is important to remember that deadlines and costs may vary depending on the location and complexity of the expansion. It is always advisable to have the advice of professionals in the real estate and legal sector.

We hope this information is useful to you. Always remember to commit to legality and transparency in everything related to your properties!

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Comercial Estate agent: +34 611 43 11 75 Booking House bookings: +34 611 43 11 72
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