Why choose Avenir Rénovations?
Why choose a roof structure elevation?
Before undertaking an expansion project, it is essential to understand the specifics of roof elevation. This involves modifying the framework to create additional space while optimizing the existing structure. It offers advantages such as extension without encroaching on the land.
The elevation of the framework involves raising the roof of your house to create an additional floor. This generally requires dismantling the existing framework, increasing the height of the load-bearing walls, and installing a new framework suitable for the development of a living space (converted attics, bedrooms, bathrooms, etc.). This solution allows you to maintain the ground area and avoid lateral extension, which is crucial in Swiss urban areas.
The operation can involve a traditional framework or an industrial framework type trusses. In the latter case, a complete overhaul of the structure is often necessary.
What are the steps involved in a roof structure elevation with Avenir Rénovations?
A project of this magnitude requires a rigorous process to ensure its success. At Avenir Rénovations Suisse, we apply a proven methodology, ensuring quality, safety, and compliance at every stage of the work, for your peace of mind and an optimal result.
The advantages of roof elevation by modifying the framework
Choosing to elevate the roof by modifying the framework is a clever solution to gain comfort without moving. This technique, increasingly common in French-speaking Switzerland, meets the needs of families wishing to enlarge their home while respecting urban and regulatory constraints. Discover below the main advantages of this type of work.
Many Swiss homeowners choose to elevate the framework to optimize their living space. First, elevation allows for an increase in living space without reducing garden size or altering the footprint. It is therefore particularly suitable for narrow plots or those subject to regulatory constraints.
This type of extension significantly enhances your property value. By creating new square meters of living space, the resale value of your home increases significantly, making it a wise long-term investment.
The roof elevation is also an opportunity to improve the thermal performance of the home through enhanced insulation integrated into the new structure. Furthermore, it offers architectural freedom: modifying the roof slope, installing dormers, or even creating a terrace for an even brighter and more modern living space.
How much do house elevation works cost?
It is crucial to establish a precise budget before embarking on an elevation. Costs vary according to various factors, such as the area to be elevated, the type of framework, the materials chosen, the accessibility of the site, and the finishes, directly impacting the final price of the work.
Here is an estimate of the average prices practiced in French-speaking Switzerland for roof elevation through modification or replacement of the framework:
| Type of service | Average price per m² (CHF incl. tax) |
| Study and administrative procedures | 100 to 200 CHF/m² |
| Demolition of existing roof | 80 to 150 CHF/m² |
| Raising walls (masonry/wood frame) | 300 to 500 CHF/m² |
| Installation of new framework | 250 to 450 CHF/m² |
| Roof and wall insulation | 100 to 200 CHF/m² |
| Roofing and waterproofing | 150 to 300 CHF/m² |
| Interior finishing (floors, partitions, etc.) | 400 to 600 CHF/m² |
| Estimated total cost (turnkey) | 1,400 to 2,400 CHF/m² |
These prices are indicative and may vary depending on the project. A site visit allows for a personalized quote.
Is it possible to elevate all houses in Switzerland?
Before starting roof structure elevation work, it is crucial to assess the technical feasibility, particularly the stability of the existing structure, as well as the regulatory aspects related to building standards and necessary permits.
Some houses cannot be elevated without major adaptations. The first constraint concerns the strength of the foundations and load-bearing walls: these must be able to support the weight of an additional floor. A thorough structural study is therefore essential.
Local regulations are another major factor to consider. Each Swiss municipality has its own building regulations, particularly regarding maximum height, roof slope, distance to property lines, or external appearance. It is also necessary to obtain a building permit from the municipal services, and sometimes a cantonal approval.
In the case of a condominium, elevation requires the agreement of all co-owners.
What are the alternatives to roof structure elevation?
Before choosing roof elevation, it is relevant to examine other available expansion options. Depending on the configuration of your house and local urban planning rules, some solutions may be more suitable for your needs or budget.
Lateral (or horizontal) extension is the classic option: it involves building a new room attached to the house, encroaching on the land. However, in French-speaking Switzerland, this solution is often limited by the lack of available space or strict implantation rules (distances to boundaries, land occupancy coefficient, etc.).
Converting existing attics is a simpler and less expensive alternative than elevation. If the ceiling height is sufficient, it is possible to utilize this space by creating a bedroom, an office, or a playroom. However, this solution heavily depends on the roof slope and the structure of the current framework.
Finally, excavating the basement (or "underpinning") can offer a solution for expansion from below, but it is technically complex and often costly. It requires strengthening the foundations and particularly demanding waterproofing work.
Roof structure elevation is ideal for increasing living space without occupying additional land, while enhancing the existing structure and preserving outdoor space.
Examples of roof structure elevation by Avenir Rénovations
Nothing better than concrete examples to illustrate the possibilities offered by roof elevation. Here are some projects carried out by our teams in French-speaking Switzerland.
In Lausanne, we completed the full elevation of a semi-detached house with an industrial frame. The goal was to create a sleeping area consisting of two bedrooms, a bathroom, and a study nook. The project required the complete removal of the original frame and the elevation of a wooden frame floor, with a new gabled roof.
In Geneva, a 1960s individual house was transformed through the elevation of its flat roof, replaced by a low-pitched frame with dormers. The new space includes a master suite with an adjoining bathroom and a garden-facing balcony.
In the canton of Vaud, a village house had its traditional frame elevated to accommodate an artist's studio filled with light. Thanks to lightweight and insulating materials, the project was completed quickly without compromising the existing structure.
These projects illustrate our expertise and know-how in adapting each site to technical constraints, the aesthetic preferences of clients, and the requirements of local regulations in force.
Frequently Asked Questions (FAQ) about roof structure elevation
To help you better understand the implications of an elevation project, here are the answers to the most frequently asked questions by Swiss homeowners.
Can my house support an elevation?
It depends on the existing structure. A structural study is essential to assess the strength of the foundations and load-bearing walls. If necessary, reinforcements may be considered.
Do I need to obtain a building permit?
Yes, in Switzerland, any elevation project requires a building permit issued by the municipality. A complete file must be submitted (plans, structural study, energy notice, etc.).
What is the average timeframe for this type of work?
It typically takes between 6 and 9 months on average, including the administrative phase, site preparation, and execution of the work.
Can we live in the house during the work?
It depends on the site. In some cases, it is possible to stay in the house, but for safety and comfort reasons, temporary relocation is often recommended during the demolition phase and the installation of the new frame.
Does elevation improve energy performance?
Yes. During the elevation, high-performance thermal insulation is integrated into the roof and walls. This improves thermal comfort while reducing energy consumption.
Can a house with a flat roof be elevated?
Yes, it is entirely possible to elevate a flat roof by installing a new pitched frame or by building a floor with a technical flat roof. This type of project requires special attention to waterproofing and rainwater drainage.
Is an elevation financially viable?
Generally speaking, yes. The cost per square meter of an elevation is often lower than the purchase price of a larger house. Additionally, the resale value of the property increases significantly.
Can Avenir Rénovations help me prepare the administrative file?
Absolutely. We handle all administrative and urban planning procedures in coordination with our partner architects and municipal technical services.
Choose Avenir Rénovations Suisse to bring your sloped roof extension project to life.
The roof structure extension is a relevant and effective solution to enlarge your home without touching the ground. In French-speaking Switzerland, where land is limited, this option allows you to gain square meters, enhance your property value, and improve thermal comfort.
With our multi-service expertise, Avenir Rénovations Suisse supports you from A to Z in your project: technical study, architectural design, administrative management, execution of work, and interior finishing. We operate in all the French-speaking cantons (Geneva, Vaud, Fribourg, Neuchâtel, Valais, Jura) with qualified local teams.
Choose a single point of contact and a turnkey solution to transform your living space and meet your space needs. Contact us today to get a personalized quote for your roof structure extension work.
