Pour rappel, la surélévation de toiture est une extension de maison par le haut (agrandissement vertical). Elle consiste à modifier un bâtiment existant dans l’objectif de lui ajouter un étage supplémentaire, ou une portion d’étage supplémentaire.

Cette opération peut aussi bien être réalisée sur une maison que sur un immeuble. En revanche, elle s’avère particulièrement coûteuse, car elle exige de lourds travaux et des études préparatoires poussées.

La réalisation d’une surélévation est donc avant tout pertinente dans les villes où le prix de l’immobilier est élevé (notamment Paris et Lyon).

À savoir : à l’échelle d’une copropriété parisienne ou lyonnaise, surélever un immeuble peut s’avérer très intéressant, car le bénéfice lié à la vente des appartements créés peut largement rentabiliser une telle opération, voire permettre de financer d’autres travaux de rénovation de l’immeuble (ravalement, parties communes, etc.).

Le coût d’une surélévation de maison et le prix d’une surélévation d’immeuble sont forcément élevés, puisqu’il s’agit de travaux de gros oeuvre. Néanmoins, il ne faut pas oublier qu’un chantier de surélévation de bâtiment permet d’augmenter considérablement la valeur d’un bien immobilier (proportionnellement à la surface habitable ajoutée).

Le prix d’une surélévation dépend généralement des éléments suivants :

• Spécificités du chantier et résultats de l’étude préalable,
• Complexité de la structure existante,-
• Matériaux de surélévation utilisés,
• Type de maison ou d’immeuble à surélever,
• Surface totale de la surélévation (le prix est toujours estimé en euros par m²),
• Destination de la surélévation (aménager une salle de bain ou une suite parentale en surélévation coûtera par exemple plus cher),
• Difficulté d’accès au chantier,
• Finitions et aménagement intérieur.

Pour vous donner un ordre globale de prix, le coût d’une surélévation au m² se situe généralement entre 2000 et 4000 euros par m². Des frais complémentaires peuvent néanmoins être nécessaires. Le budget exact dépendra toujours de la nature du projet et du type d’aménagements, d’où la nécessité de demander un devis sur mesure avant d’entamer un tel chantier.

Naturellement, l’estimation tarifaire d’une surélévation s’avère complexe. N’hésitez pas à nous contacter gratuitement, pour profiter d’un devis de surélévation gratuit à Lyon, Paris ou en Île-de-France.

Raising an old house can be done in different ways and with many materials. Of course,  MERO is able to carry out all types of raising in Paris, Lyon and the Île-de-France region .

It should be noted that the choice of a raising method often depends on the results of the preliminary study. Raising a house in the Paris region must also comply with your municipality's local urban planning scheme. Furthermore, it's important to remember that raising a house or building isn't always possible.

Based on the results of our in-house design office, we will offer you the roof raising solution best suited to your building . You should know that there are two main types of roof raising:

The wooden extension

A timber-framed extension allows you to quickly expand your home and, more importantly, reduce the load on the foundations. It's important to remember that a house's foundations aren't designed to add a floor to your home.

Therefore,  a roof extension company must offer you a lightweight roof extension that can be supported by the existing foundations . Apart from its lightness, the wooden extension has the advantage of being quicker to build and install.

It will be more visible than a traditional extension, since it is generally equipped with wood cladding. But you can count on our architects and craftsmen for a timber-frame extension that integrates perfectly with your existing building.

The metal elevation

The metal extension is a very interesting alternative to the wooden extension.  The metal frame is a structure designed in the workshop, and even lighter than wood . 

One of its major advantages is its speed of implementation on site, which allows work to be considerably accelerated and therefore their budget reduced.

DSD Rénov can offer you its solutions for raising your building or house with a metal frame.

The traditional (masonry) elevation

Often, homeowners prefer an extension that blends in with their existing architecture. To discreetly raise your home, you can opt for a traditional roof extension, made of bricks or concrete blocks.  The principle of a traditional roof extension is to respect the architecture and materials of the house to be raised.

Our companions, specialists in raising roofs in Paris and the Île-de-France region, will therefore offer you a roof extension that perfectly matches your current façade, thanks to the use of coatings or paint.

You can count on the skills of the MERO renovation company to carry out this project according to the rules of the art.

A complete extension involves adding a floor to a townhouse or building.

A complete extension allows you to benefit from a significant increase in living space:

• For a house:  you will be able to double your interior surface area (in the case of single-story houses, for example).
• For a building:  this may involve creating one or more additional apartments, which can generate substantial income for a co-ownership. The profits generated can, in particular, finance major renovation work, such as roof repairs, facade renovations, or exterior insulation of the building.

For this type of project, your dedicated architect will conduct a comprehensive study to confirm the project's feasibility. MERO will advise you on the best options for a complete house extension.

A complete extension will often involve the use of a timber-frame or metal-frame extension, which is lighter and therefore easier to support for the building's foundations. As with any extension, the installation of a staircase will allow access to this new part of the building.

Partial house raising, as the name suggests, involves raising the roof of a house over a limited portion of the roof. For example, this could involve raising the roof over half the length of the building.

A partial elevation is recommended on larger roofs , for owners who need a limited additional surface area, or if the elevation architect recommends a roof extension with reduced weight.

In some cases, it is the architecture of the building that will justify the use of a partial elevation, or simply local planning regulations. This is also a possibility to consider for an apartment elevation, in which the co-owner of the top floor seeks to create a duplex or expand their living space, without impacting the common areas of the building.

MERO is fully capable of carrying out a partial extension to add a floor to a house or building.

It is obvious that a building extension project can only be estimated on a case-by-case basis, depending on the surface area and the nature of the work . The exact budget for such a project is generally only estimated following a preliminary design stage, even if it is possible to have some general estimates.

Only a specialist in elevation can clearly inform you about the cost of your project and assure you of its feasibility.

Are you looking for a roof extension company in Paris, the Île-de-France region, or even Lyon? Why not call on the experts at MERO?

Our company is one of the few elevation companies to offer a turnkey service , which includes not only the intervention of an architect, but also qualified building professionals for the completion of the project.

We support you in all your roof raising projects:

• Building extensions AND house extensions,
• Wooden frame extension,
• Metal frame extension,
• Masonry elevation, etc.

All our projects begin with a free, no-obligation quote for the extension . You can even benefit from a remote study to check the administrative feasibility of your project.

Speak to an architect for free who will provide you with information on the different stages of the project and give you a clear idea of ​​the cost of an extension.

Simply detail your needs in our form, and we will provide you with a free, no-obligation house extension quote within 24 business hours.