At La Quinta Fachada, we work daily with investors and owners who ask us the same question: “If I invest €50,000 here, how much value do I add to the house?”. Well-planned architecture is a financial tool. Below, we analyse the renovations that add value and maximise ROI (Return on Investment) on the Costa Blanca.

The “open concept”: Visual square metres that sell

If there is a king among renovations that add value, it is knocking down walls. Villas built in the 80s and 90s in areas like Denia or Benissa often feature closed kitchens and dark corridors.

• The strategy: Unify the kitchen, dining, and living areas.

• The return: The international buyer (Northern European, above all) does not want isolated kitchens. Opening up the space not only modernises the home but increases the perception of square footage and light. A 60m² open-plan day area is valued much higher than three small 20m² rooms.

En-suite bathrooms: Privacy is luxury

When planning renovations that add value, the number of bathrooms matters just as much, if not more, than the number of bedrooms. The current luxury standard demands privacy.

• The strategy: Is it worth sacrificing a small box room to turn it into a second bathroom or an en-suite for the master bedroom? The answer is yes.

• The return: A 4-bedroom villa with 2 bathrooms has a much lower price ceiling than a 3-bedroom villa where each has an en-suite bathroom (3 bathrooms). In the market of Altea Hills or Cumbre del Sol, the “bath-to-bed ratio” is a key price indicator.

Energy efficiency: Invisible but vital investment

It may not be as “sexy” as a marble kitchen, but improving the thermal envelope is one of the safest renovations that add value today.

• The strategy: Replacing old joinery (windows) with thermal break systems and low-emissivity glass, and installing aerothermal systems (air source heat pumps).

• The return: Buyers are increasingly conscious of sustainability and energy costs. A villa with an A or B energy certificate sells much faster and at a better price than one with a G rating, especially to German or Scandinavian buyers who value thermal comfort over pure aesthetics.

The exterior: First impressions on the Costa Blanca

In our climate, life happens outside. Neglecting the exterior is a financial error. Renovations that add value must always look to the garden.

• The strategy: It is not just about the pool. We are talking about creating a summer kitchen, bioclimatic pergolas, or improving the façade (modernising balustrades, removing dated arches).

• The return: In Javea or Calpe, outdoor living is the main selling point. An exterior that functions as a “second living room” skyrockets the perceived value of the property.

What NOT to do (Over-personalisation)

To maximise ROI, the design must be sophisticated yet neutral. Investing in extremely personal finishes (red tiles, fixed artistic murals) usually limits the market.

Renovations that add value are those that combine functionality, light, and noble, timeless materials. If you are thinking of renovating to sell or to increase the value of your assets on the Costa Blanca, contact us. At La Quinta Fachada, we design with your well-being and your wallet in mind.

La entrada Architecture that adds value: Renovations that increase resale price the most se publicó primero en La Quinta Fachada: Arquitecto en Costa Blanca, Alicante y Valencia.

Knowing which renovations can be done without a permit will save you time, money, and hassle. In this article, we explain which home improvements do not require approval, when you might need to notify the council, and how to avoid legal issues.

Renovations without a permit: What work can be done without approval?

Not all home improvements require municipal authorisation. In general, you do not need a building permit if you do not modify the structure of the property, alter the façade, or make changes to communal elements. Below is a list of renovations that can be carried out without official permits:

Interior painting and finishes

Painting your walls or applying wallpaper, tiles, or decorative vinyl does not require a permit. Similarly, installing parquet or floating floors inside your home can be done freely.

Furniture replacement and interior carpentry

Renovating kitchen furniture, replacing interior doors, or installing built-in wardrobes can be carried out without a permit.

Minor electrical and plumbing installations

Replacing sockets, taps, or bathroom fixtures without altering the overall system does not require approval. However, if you extend the electrical network or modify the building’s plumbing, a prior notification may be required.

Window replacement without size modification

If you replace windows with new ones of the same size and design, you do not need a permit. However, changing the colour, type of opening, or size may require approval from the local council.

Air conditioning installation

If the indoor unit is installed without modifying the building’s façade, no permit is needed. However, if the outdoor unit is placed in a visible location, approval may be required.

Terrace and patio improvements

Adding artificial grass, removable pergolas, planters, or decorative elements in private terraces is permitted without a licence. However, fixed enclosures or permanent structures may require approval.

Decorative enhancements

Changing mouldings, skirting boards, baseboards, or decorative elements on walls and ceilings is another renovation that does not require a permit.

When is prior notification to the council required?

Although many minor renovations do not require approval, some may require prior notification to the local council. This is a formal notice before starting work, without the need for a full permit application. Situations requiring prior notification include:

• Replacing windows if the building’s exterior aesthetics are altered.
• Installing awnings or fixed pergolas on terraces.
• Changing the flooring in communal areas.
• Works that generate large amounts of waste affecting public spaces.

To ensure that your renovation does not require additional approval, it is always advisable to check local regulations before starting work.

What happens if you carry out work without a permit when one is required?

If you carry out renovations without the necessary permits, you could face:

• A fine for an urban planning violation.
• An order to stop the work.
• A requirement to revert the changes to their original state.

The penalties vary depending on the local council’s regulations and the type of unauthorised work.

If the council detects unapproved work, you have two options:

1. Apply for retrospective approval – In some cases, it is possible to legalise the renovation by applying for a permit after the work has been completed.
2. Undo the work – If the renovation does not comply with regulations, you may be required to restore the property to its original condition.

To avoid these problems, it is always best to check the regulations in advance and seek advice from an architect if you are unsure.

Tips for safe renovations without a permit

Check local regulations: Some municipalities have specific rules even for minor renovations.
Hire qualified professionals: Even if no permit is needed, it is best to have the work done by experts.
Avoid modifying communal elements: In apartment buildings, check the homeowners’ association rules before making changes to façades or terraces.
Manage waste properly: If the work generates rubble, make sure it is disposed of correctly to avoid fines.

Frequently asked questions

Can I renovate my home without a permit?

Yes, as long as the work does not affect the structure, façade, or communal elements of the building.

Do I need approval from the homeowners’ association for renovations?

If the renovation affects communal areas or causes disruptions, it is advisable to inform the homeowners’ association to avoid conflicts.

Can I enclose my terrace without a permit?

No, closing off a terrace typically requires municipal approval.

How can I find out if my renovation requires a permit?

You can check with your local council or consult an architect for expert advice.

What should I do if I am fined for an unauthorised renovation?

It is best to consult a professional to determine if the work can be legalised or if an appeal can be filed.

Final thoughts

Many home renovations can be carried out without a building permit, as long as they do not affect the structure of the property or modify the façade. Understanding current regulations will help you avoid penalties and complete your renovation without issues.

If you are unsure whether your renovation requires approval or want to ensure everything is legally compliant, La Quinta Fachada offers expert advice to help you carry out your project without complications. Contact us today and start transforming your home hassle-free!

La entrada Home renovations that do not require a building permit se publicó primero en La Quinta Fachada: Arquitecto en Costa Blanca, Alicante y Valencia.