Price for fit-out of attics in Luxembourg

2 - The current state of the attic in the home

The budget required to fit out an already usable attic will be lower than that needed to transform an initially unusable space, for an equivalent final area.

Attics referred to as convertible have a ceiling height of at least 1.80 meters and are generally located under a roof with a slope of more than 35°, allowing for comfortable circulation and simplified implementation.

In contrast, lost attics often present:

• a roof slope of less than 30°,
• limited height under the framework,
• bulky framing reducing usable space.

In these situations, structural adaptations may be necessary.

Our specialists examine the condition of the framework, roofing, and load-bearing elements to determine the essential modifications to ensure the strength and safety of the structure.

When preliminary work is required (strengthening the structure, modifying the slope, raising the perimeter walls), the budget can increase significantly.

In some cases, raising the exterior walls involves completely removing the roof, raising the facades, and then reinstalling the roofing and insulation, which represents a significant investment.

3 - The nature of the work necessary for the attic fit-out

The fit-out may include only structural and technical interventions, or also encompass all interior finishes.

Depending on the layout and the intended use (bedroom, office, playroom, master suite), the volume of work varies considerably.

The choice of materials strongly influences the total amount.

Regarding insulation, an external intervention (sarking) offers excellent thermal performance and optimal waterproofing, but its cost is higher than insulation performed from the inside.

Partitioning solutions also play a key role:

• plasterboard or lightweight panels for an economical option,
• solid wood, glass, or cellular concrete for better acoustic and thermal comfort, at a higher price.

For natural light, the installation of roof windows is a common solution. The addition of motorized or solar roller shutters represents an additional cost. A large sliding door will require a larger budget than a standard window.

The creation of access to the developed floor must also be anticipated:

• a straight, comfortable, and aesthetic staircase involves a higher investment,
• a spiral, turning, or retractable staircase allows for limiting expenses in a restricted space.

Finally, if you want a fully finished and immediately usable space, the budget will be higher than that of a raw shell.

Avenir Rénovations can ensure all finishes:

• installation of floor coverings (parquet, tiles, flexible flooring),
• application of paints or decorative coatings,
• installation of custom storage solutions,
• creation of a bathroom or kitchenette under the roof.

A "turnkey" project in Luxembourg naturally represents a larger investment than a simple structural fit-out.