Why choose Avenir Renovations?
Why enlarge your house today in Belgium?
Enlarging is not just about building. It is responding to a life change, a need for space, or an investment opportunity. Here are the main situations our clients encounter.
A growing family
A new child, a teenager wanting independence, a relative to accommodate: the house must adapt without losing comfort.
A professional need
Remote work, self-employment, or a home office: a dedicated space becomes essential.
A desire for comfort and modernity
Open kitchen, spacious living room, master suite… Desires evolve with age and financial comfort.
A property enhancement project
More living space means significantly improved resale value, especially in major Belgian cities. With us, brick will always be a good investment.
The 3 key steps of a successful home extension project
Expanding your home is an important process that must be well planned to avoid surprises. At Avenir Rénovations, we support our clients from the first meeting to the completion of the project, with a clear, transparent, and proven method. Here are the three essential steps to ensure your project runs smoothly.
What solutions does Avenir Rénovations offer?
Every house is different. That’s why we offer home extension solutions tailored to your land, budget, and local regulations.
This involves adding a room at ground level, on the side or at the back of the house. This solution is ideal when you have a garden or a yard of sufficient size.
This involves creating a new floor above the existing house. It requires a thorough structural study and a specific planning permission. We can advise you on this point.
With effective insulation and the installation of roof frames, your attic becomes a bright and comfortable space. This is generally the most immediate and least expensive solution.
This unused space can easily become a bedroom, an office, or a laundry room. Check our page “transforming a garage into living space”.
Modern and bright, a glazed extension offers additional living space open to the outside while remaining well insulated. This extension is quicker to build than a masonry extension while adding significant value to your home.
How much does a home extension cost in Belgium?
Prices vary depending on the type of extension, materials, created area, and technical constraints. Here are average estimates from Belgium:
| Type of extension | Average price per m² including VAT |
| Masonry side extension | 1,500 to 2,200 € |
| Storey addition | 1,800 to 2,500 € |
| Isolated glazed veranda | 1,200 to 2,000 € |
| Loft conversion | 1,000 to 1,800 € |
| Garage conversion | 800 to 1,500 € |
A personalized quote is provided free of charge after a technical visit.
The technical and aesthetic advantages
Choosing Avenir Rénovations to enlarge your house ensures a well-designed, well-managed project that perfectly matches your desires.
High-performance and Belgian materials (when possible)
We prioritize short supply chains, durable materials, and compliance with energy performance standards.
A coherent architecture
We ensure harmony between the existing structure and the extension: shape, roof, finishes, coverings.
Optimized comfort
Insulation, ventilation, natural light: the extension improves the quality of life for the entire house.
Guaranteed compliance
Our partner architects ensure that your project complies with all regional and municipal regulations, both in terms of architecture and urban planning.
Why trust Avenir Rénovations?
- A network of local agencies and experienced professionals
- A single point of contact to simplify your procedures
- Partner architects for plans and permit submission
- Complete coordination of all trades
- Strong guarantees, including a ten-year guarantee
- A specific expertise in renovation and extension
FAQ: home extension in Belgium
Is a planning permit required to enlarge your house?
Yes. In Belgium, any modification of the volume or built surface requires a planning permit, even if you remain within your property boundaries. Within Wallonia, the rules vary from one municipality to another, particularly regarding maximum height, distance from neighbors, exterior cladding, or type of roof allowed. A permit is mandatory as soon as you touch the structure or facade. At Avenir Rénovations, we conduct a planning audit from the start of the project. We work with licensed architects who ensure the design of the plans and submission to the municipality. You can thus be sure to comply with local legislation and avoid any refusals or delays in construction.
Is it more cost-effective than moving?
Very often, yes. Selling, buying, and moving involves considerable costs: notary fees, registration, moving expenses, adapting to the new home… Enlarging allows you to maintain a cherished living environment while enhancing your property. Moreover, home extension works are 100% customizable, which is not the case when purchasing. The resale of an enlarged property generally happens more quickly and at a higher price. You thus benefit from immediate comfort and a medium-term return on investment.
What is the average duration of a construction project?
It depends on the type of project. A simple extension can be completed in 2 to 4 months. A storey addition or fit-out of attics will take about 3 to 6 months. Avenir Rénovations provides a precise schedule upon signing the estimate. Each stage of the construction is carefully coordinated to avoid unnecessary interruptions. You are informed at every phase of progress, with a single point of contact.
Is an architect always required?
Not necessarily. For small works (under 40 m²), an architect is not always required. However, as soon as there is a modification of the volume, roof, or facades, the intervention of a licensed architect is required. They will be responsible for the plans, the planning file, and regulatory follow-up. At Avenir Rénovations, we work with partner architects who know the specifics of Belgian municipalities.
Does an extension increase the property's value?
Yes, without a doubt. An additional space (living room, bedroom, office) makes your property more attractive and functional. This translates into an increase in price per m², especially in tight areas like Brussels, Namur, or Liège. The extension also improves energy performance if insulation is enhanced, which affects the energy performance score. It is therefore a doubly relevant investment.
Bring your project to life with Avenir Rénovations
Your home deserves to grow with you. Whether it's for more space, more comfort, or more value, Avenir Rénovations supports you step by step in your home extension project. Contact your local agency for a free, no-obligation study.
