Why choose Avenir Renovations?
What work is required for a home extension in the canton of Basel-City?
Lack of space forces you to choose between expanding on the ground with a lateral extension or gaining a floor with a storey addition. For a home extension in Basel, this choice then determines the structural work and finishing work to be done. Our renovation company helps you decide.
A lateral extension to gain a ground-level room
You gain a ground-level room, accessible without stairs, directly extending from your living room or kitchen. With a home extension lateral, the new space is backed against an existing wall and rests on its own foundations. It accommodates a bedroom or an office open to the garden. This choice requires a ground footprint available on your land, which our building professional verifies during the study.
A storey addition: before and after on the existing house
Before the work, your single-story house already occupies most of the plot. After a storey addition, it gains a full floor without reducing the garden by a single square meter. This solution is suitable for narrow plots, where a lateral extension would encroach on the distances to neighboring boundaries.
In return, the existing structure must support the weight of the new floor, which can only be confirmed by a technical study. Our Project Manager has the load-bearing walls and foundations checked before any preliminary project. During the construction, the roof is removed and then replaced, which requires precise organization.
The structural work and finishing work of the new space
Every new space relies on two distinct phases: the structural work creates the watertight structure, while the finishing work makes it habitable. Our qualified craftsmen work according to Swiss standards, under the coordination of our renovation company in Basel. For your extension, the main tasks are divided as follows:
- earthworks and foundations, which anchor the extension in the ground,
- walls or framework, then the roof structure and covering,
- insulation and networks, installed before the partition walls are closed,
- floor and wall coverings, which give the room its final appearance.
This distribution serves as the basis for the schedule established with you before the start.
The steps of an extension project in the canton of Basel-City
After choosing between a lateral extension and a storey addition, your project is organized over time. Each step follows a precise order, from the study to the completion. Our building professional oversees this process and keeps you informed at each transition from one phase to the next.
Avenir Renovations, a method to carry out the project in Basel
Expanding your home does not require you to coordinate multiple craftsmen and various administrative procedures on your own. At Avenir Renovations Basel, we entrust the coordination of your project to our Project Manager, from the study to the handover. You retain control over decisions without having to manage the trades alone.
Can your extension benefit from public assistance? The answer depends on the nature of the planned work and your municipality. The Building Program and cantonal or municipal subsidies are part of the schemes to consider. At Avenir Renovations, we identify the available assistance for your project and submit the applications before the work begins. The documents required for each application are indicated to you from the study phase. This administrative follow-up is integrated into the project timeline, without any additional steps on your part. No amount is guaranteed, and the approval is subject to the competent authority.
You know the cost of your extension in detail before making any decisions about your future construction site. The quote remains free and personalized, even when it requires a visit to examine your house. Our construction professional measures the surfaces and observes the existing structure with you.
After your request, a callback occurs within 48 hours to clarify your needs and constraints. Each request then receives a response within 24 to 48 hours, which limits the waiting time between two exchanges. At Avenir Renovations Basel, we commit to this response time for each quote requested in Basel.
What budget for a home extension in Basel?
The budget for a home extension in Basel is built item by item, with most amounts expressed per square meter of created surface. Administrative procedures form a fixed item, calculated for the entire project. Average prices remain indicative, and only a visit allows for an accurate estimate of your case.
Several factors affect the quote: the created surface, the choice between lateral extension and storey addition, the selected materials, and the complexity of the administrative file. A storey addition may require reinforcement of the existing structure, which impacts the major work. The choice between wood frame and masonry also alters the final amount.
To estimate your home extension in Basel, our Project Manager studies your house and your plans before preparing the quote. At Avenir Renovations, we invite you to present your project now to receive an estimate tailored to your surface.
Details of the expense items for a home extension in Basel (including tax)
| Types of work | Average price |
| Architectural study | 300 CHF per m² |
| Main work of extension | 3,500 CHF per m² |
| Finishing work of extension | 2,000 CHF per m² |
| Final touches of extension | 1,400 CHF per m² |
| Administrative fees | 10,000 CHF per project |
Home extension in Basel: should you opt for a storey addition or a lateral extension to gain an extra room?
The choice mainly depends on the available ground area on your plot. If your land allows space around the house, a lateral extension creates a ground-floor room without affecting the existing roof. On a narrow plot or one that is already largely built upon, a storey addition becomes the logical path, provided the structure can support an additional floor. The urban planning regulations applicable to your plot also set the allowed heights and distances, and sometimes they decide for you. For a semi-detached house or a sloping plot, the opinion of a local professional is necessary before making any choice. At Avenir Renovations Basel, we compare both options during the feasibility study, supported by plans and constraints.
With our renovation company, you entrust your home extension project in Basel to a company that manages every step until completion. At Avenir Renovations, we await your request to assess your house and start your work.
Agency Avenir
Rénovations
for Home extension in Basel
An expert to take charge of your renovation projects and guarantee deadlines, budgets and quality of all services.
