In this article, we explain how to legalise a renovation already done in Dénia or Jávea, what steps to follow, and key recommendations to avoid legal complications or fines.

When is it necessary to legalise a renovation?

You must regularise any work that has altered the original property and is not officially documented. For example:

• Surface extensions (adding a floor, enclosing a porch, etc.)
• Changes to the internal layout
• Works affecting the façade or roof
• Structural changes (reinforced slabs, walls, etc.)
• Change of use (garage converted to living space, storage room into apartment…)
• Swimming pools built without permission

Even if years have passed and the local council hasn’t issued a penalty, this does not mean the renovation is legalised. If it’s not declared or registered, it remains irregular.

How to Legalise a Renovation Already Done: Step by Step

1. Assess the current state of the property

Start by comparing the current state of the property with its cadastral record, the original building licence (if available), and its registration details. An architect can help identify which parts are not regularised.

2. Drafting a Certificate of Antiquity

In many cases, if more than four years have passed since the renovation was completed (and it’s not on protected land), the offence is considered prescribed. You can then submit a technical certificate of antiquity to prove when the works were carried out.

This document must be signed by an architect or technical architect and accompanied by photos, plans, receipts, testimonies, etc.

3. Legalisation project

If the renovation affects structural elements, façades or includes added volume, the town hall may require a legalisation project. This must be prepared by a qualified technician and officially submitted through their professional association.

It includes a descriptive report, current state plans, compliance with planning regulations, and a proposal for regularisation.

4. Requesting legalisation licence from the Council

Using the certificate of antiquity or project (as applicable), you must apply for a legalisation licence from Dénia or Jávea’s town hall.

This process is similar to obtaining a regular planning permission: municipal fees apply, and there may be a fine for having done the works without a permit.

5. Update the cadastre and Land Registry

Once the legalisation licence is granted, you must update the cadastral information so it reflects the actual layout and surface.

After that, you can update the Land Registry, ensuring legal clarity and facilitating future transactions (sale, inheritance, mortgage…).

Key recommendations for legalising renovations in Jávea or Dénia

At La Quinta Fachada, we suggest the following if you’re in this situation:

• Don’t delay regularising. The longer you wait, the harder it becomes to prove the age of the works or comply with current planning rules.
• Contact a local technician experienced in Dénia and Jávea councils. Each town has its own criteria and requirements.
• Check whether your town hall has opened an urban planning file. This could influence the process.
• If the renovation is on rural or protected land, different requirements may apply. It’s essential to review local planning laws.
• Even if legalisation is possible, it may involve fines, fees, or taxes. Get informed before starting the process.

What happens if i don’t legalise a renovation already done?

• You may struggle to sell or mortgage the property, as unregistered works “don’t exist” legally.
• The council may issue fines or demand compliance if they detect irregularities.
• Inheritances become more complex when properties are not fully legal.
• If you want to apply for future planning permission, the council may require you to legalise previous works first.

Frequently asked questions about legalising renovations in Jávea and Dénia

Can I legalise a renovation without receipts or original plans?

Yes, provided you can prove its age through other means: dated photos, material purchase receipts, neighbour testimonies, technical certificates, etc.

How much does it cost to legalise a renovation already done?

It depends on the renovation type, technical fees, and municipal taxes. As a guide:

• Certificate of antiquity: from €400
• Full legalisation project: from €1,200
• Town hall fees and fines: vary by case

How long does the process take?

Between 1 and 3 months, depending on the speed of the council and the quality of the documents provided. Complex works may take longer.

What if the work cannot be legalised?

In that case, the council may demand demolition. They may also withhold new planning permissions until the issue is resolved. That’s why consulting an architect beforehand is crucial.

Regularise your renovation with professional help

Legalising a renovation already done in Dénia or Jávea is possible when the right steps are followed and professional advice is sought. While it may seem bureaucratic, it brings peace of mind, eases future processes, and avoids sanctions.

At La Quinta Fachada, we guide you throughout the process—from technical evaluation to council paperwork. If you have doubts about your home’s legal status, contact us. We’ll make sure everything is in order.

La entrada How to legalise a renovation already done in Dénia or Jávea: step-by-step guide and recommendations se publicó primero en La Quinta Fachada: Arquitecto en Costa Blanca, Alicante y Valencia.

Although the situation may seem complicated, the good news is that it is indeed possible to legalise building work carried out without a licence, provided certain conditions are met. At La Quinta Fachada Arquitectura, we’ve helped numerous clients successfully regularise irregular planning situations. In this article, we explain step by step how to do it, what documentation is required, and the risks of not legalising.

What is considered an unauthorised renovation?

An unauthorised renovation refers to any building work carried out without first obtaining the required planning permission from the local council. This can include:

• Internal reconfiguration

• Extension of built surface area

• Enclosing terraces or porches

• Change of use (e.g. converting a garage into a bedroom)

• Restoration works without a formal project

• Structural alterations without a permit

Even if the property looks perfectly finished, if there is no official file and corresponding building permit or prior notification, the work is not legally recognised.

Why is it important to legalise an existing renovation?

Regularising a renovation doesn’t just save you from future problems it protects your investment.

The main reasons for legalising are:

• To avoid planning fines or penalties

• To be able to sell or rent the property without legal obstacles

• To update the Land Registry and Cadastre

• To access grants for energy efficiency or restoration

• To ensure home insurance coverage

• To prevent disputes with neighbours, the residents’ association, or the local council

Very often, the inability to register an extension or renovation ends up delaying or even blocking the sale of a property.

Can any renovation be legalised?

Not always. To legalise a renovation that has already been carried out, two essential conditions must be met:

• The work must comply with current planning regulations.
  In other words, the alterations must be legalisable today, even if they weren’t when they were originally done.

• The legal time limit for planning offences must not have expired.
  In the Comunidad Valenciana, the general statute of limitations is four years from the date the work was completed. After that period, the council can no longer impose fines or order demolition, but the work will still be considered illegal unless it is formally regularised.

How can i legalise a renovation that has already been carried out?

The procedure varies depending on the scale of the work, but generally, the steps are as follows:

1. Contact a registered architect

The first step is to have a professional assess the work, review current local planning regulations, and determine whether the alterations can be legalised. At La Quinta Fachada, we carry out this initial visit with a basic technical report.

2. Draft the legalisation project

If the renovation is compatible with regulations, a technical legalisation project is drawn up and submitted for approval by the Official College of Architects of the Comunidad Valenciana.

This project typically includes:

• Descriptive report

• Drawings showing the current state

• Urban planning compliance statement

• Technical certificates

3. Submit the file to the local council

All documentation is submitted along with a formal application for a legalisation permit. In some municipalities, taxes and fees are charged as if the work were about to begin meaning they apply retroactively.

4. Await approval and register the changes

Once the council approves the permit, you can register the renovation with the Cadastre and Land Registry, thereby updating the legal and fiscal status of the property.

What happens if i don’t legalise an old renovation?

Even if the four-year statute of limitations has passed and the council can no longer fine you, an unauthorised renovation can still cause significant problems:

• You won’t be able to legally sell the property without declaring the discrepancies

• The notary or bank may require legalisation to proceed with a mortgage

• You won’t be eligible for public grants for restoration or energy efficiency

• Insurance providers may refuse to cover damage in undeclared areas

• In the event of an inspection, you may be required to justify the condition of the property

Common unauthorised renovations on the Costa Blanca

In our daily work as an architecture studio on the Costa Blanca, we regularly come across similar cases:

• Extensions to old villas carried out without planning permission

• Porches or terraces enclosed with glass

• Basements converted into living space without being declared

• Structural renovations in village houses

• Changes of use not updated in the Cadastre

Legalising these situations is possible, but the sooner action is taken, the easier it is.

Better to Regularise in Time

If you own a renovated property without a permit in Dénia, Jávea, Benissa, Moraira, Ondara or anywhere in the Valencian Community, we strongly recommend you don’t delay. Legalisation is possible—as long as you act with proper guidance and the support of professionals.

At La Quinta Fachada Arquitectura, we have experience in preparing legalisation projects, liaising with local councils, and updating technical and land registry documentation.

Because a well-executed renovation shouldn’t just look good—it should also be properly documented and fully legalised.

Need to legalise an existing renovation?

We’d be happy to help you regularise your situation with clear, tailored, and secure solutions.

La entrada Legalising an existing renovation: What to do and how to regularise your property se publicó primero en La Quinta Fachada: Arquitecto en Costa Blanca, Alicante y Valencia.