A guide to understanding the real cost and key factors before budgeting
Changing a home's electrical installation is a major investment that many homeowners put off. However, when the installation is old, does not comply with regulations or has recurring faults, it is essential to guarantee the safety, comfort and energy efficiency of the home. At Iluminamos tu Vida we want to help you understand the cost of this action in Madrid in 2025, what factors affect it and how you can plan the reform realistically, without surprises.
Indicative price range for Madrid
In today's market, prices can vary considerably, but as a useful reference for a typical home in Madrid, a complete renovation of the electrical installation is usually between €2,000 and €9,500, depending on the size, complexity and finishes. For example, in homes of around 90-100 m², figures of approximately €3,000 to €4,000 are estimated if the previous state is not too deteriorated.
In Madrid in particular, some reports indicate that the average cost can be close to €4,000 for a standard flat, although this figure rises if extensive masonry work or updating of regulations is required.
On the other hand, more complex reforms, for example in large homes, with home automation, changes to the electrical panel or complete wiring distribution can exceed €10,000. These data are useful to situate you, but as always, every home is different and it is best to request a personalised quote.
Price drivers
The final cost of changing the electrical installation depends on many factors, some of the most relevant are:
- Square metres of the dwelling: The larger the house, the more metres of wiring are required, the more light points, sockets and installation routes.
- Age and condition of the existing installation: If the installation is very old, has obsolete materials (e.g. Bergman pipes, deteriorated copper wiring, no earth connection), the budget is increased because additional adaptation and legalisation work has to be carried out.
- Scope of the reform: If the renovation only involves “updating” the installation without any major work, the cost will be lower; on the other hand, if it involves opening walls, replacing pipes, redistributing the installation, changing the electrical panel or implementing home automation, the cost increases significantly.
- Regulations and legalisation: In electrical refurbishments it is common to have to comply with current regulations, obtain a bulletin (CIE) and ensure that the installation has an earth connection, correct differentials, etc. This may involve an additional cost.
- Quality of materials and finishes: The type of wiring, protections, degree of finishing, intelligent devices or special lighting can raise the budget.
- Manpower and geographical location: In large cities such as Madrid, the cost of labour is higher than in rural areas, which influences the final cost.
How to estimate a cost for a typical house
To help you get an idea, let's look at three scenarios of typical dwellings in Madrid:
- Small dwelling (e.g. 60-70 m²) where the installation is some years old but does not require significant masonry work. In such cases, the cost can range from €2,000 to €4,000.
- Medium-sized dwelling (90-100 m²) with old installation, requires redistribution, new electrical panel and various interventions. In this case it is common to find estimates between €3,000 and €5,000.
- Large or detached house (>150 m²), with complete reformulation of the installation, integration of control systems, domotics or redistribution of spaces. Here budgets can exceed €8,000 - €10,000 or more depending on luxury and complexity.
These values are indicative: when the house has additional problems (dampness, protected structures, difficult access), the cost can go up even more.
How to prepare for your budget request
To ensure that the budget you receive is as tight as possible and to avoid surprises, we recommend the following steps:
First, make an orientative inventory of the light points, sockets and main appliances that you have in your home. Think about whether you want to add new points or increase power, as this has an influence.
Second, check the condition of the house: are there any open cracks, is the floor to be painted or renovated at the same time? If you are doing a general renovation, including the electrical installation at this time can reduce costs.
Third, ask for at least two or three detailed quotations specifying what is included: materials, labour, protections, bulletin, dismantling, masonry, etc.
Fourth, make sure that the professional is authorised and offers a guarantee, so that the renovation is perfectly legalised and safe.
At Iluminamos tu Vida we offer a free diagnosis in Madrid to help you assess the state of the installation and provide you with a closed and transparent quote.
Added value and benefits of a well-done reform
Investing in a new electrical installation is not just another job: it is a key step towards a safer, more efficient home that is ready for the present and the future. A new installation reduces electrical risks, improves the ability to cope with modern appliances, allows quality lighting and improves the valuation of the property.
In addition, by working with quality and professional materials, the useful life of the installation is extended and outages or breakdowns are reduced. Finally, you can take the opportunity to implement improvements such as LED lighting, intelligent control systems or a better organisation of the circuits, which brings comfort and modernity to the home.