House storey addition prices in Belgium

Do you want to enlarge the interior space of your home in Belgium without changing your address? A roof raise is a simple and effective option to achieve this goal. It is a vertical extension project requiring the intervention of a qualified specialist in Belgium. Without proceeding with the fit-out of the attic, this technique allows you to increase the available height in your building. The experts from the Avenir Rénovations team in Belgium have all the necessary skills to assist you with your house storey addition project. However, such an intervention involves a precise budget. What elements should you consider to define the cost of a storey addition in Belgium? We present the factors that may influence the final amount of the storey addition work.

House storey addition prices in Belgium
Cost assessment of a house storey addition in Belgium

To obtain an accurate calculation, here are the essential points to know in Belgium

What you will need

time 5
Surface au sol
Surface au sol

Vous devez connaître plus ou moins la surface au sol à rénover.

Surface au mur
Surface au mur

S'il faut repeindre, isoler ou encore carreler un mur, vous devez nous fournir la largeur et la hauteur de la surface de vos murs.

Besoin de démolition de l'existant ou pas
Besoin de démolition de l'existant ou pas

Dites-nous si vous avez besoin d'une démolition de l'existant ou pas ? 

Type de revêtement au sol
Type de revêtement au sol

Carrelage, parquet, béton de sol, ... dites-nous le type de revêtement de sol que vous voulez.

What you will get

Un devis détaillé

A detailed quote

for labour
Une shopping list

A shopping list

to select your supplies in our online shop and finalize your quote
Une estimation

The advice

from your regional Works Manager

To help you more clearly assess the amount of your storey addition work in Belgium,
we detail the points that can affect the overall price of a storey addition.

At the end of your estimate, you can contact us to discuss your project in Belgium.

The various factors that define the cost of a storey addition in Belgium

The cost of a storey addition in Belgium depends on several criteria, including the area to be raised. The larger the area concerned, the higher the expenses to be anticipated. The surface area to be raised thus determines the labor rate and the quantity of materials needed in Belgium.

The overall cost of the storey addition work in Belgium is also influenced by the complexity of the roof structure. Removing a roof with an elaborate shape requires more time, handling, and the intervention of a specialist. If the architecture includes irregular volumes, a larger budget will need to be anticipated in Belgium.

The cost of raising your home in Belgium can vary depending on the material chosen to cover the new roof. For example, a bitumen shingle roof will generally be less expensive than a wooden covering. The price will increase further if you opt for high-end materials or advanced techniques. You will also need to consider the interior finishes to determine the cost of your roof extension in Belgium. This includes the choice of wall coverings after the work, as well as the necessary extensions of electrical and sanitary installations.

The storey addition of a house in Belgium also involves expenses related to obtaining the required permits to start the work. Several administrative steps must be completed depending on the location and configuration of your home to obtain the appropriate permit. Your budget must finally include the geographical area of your property. The cost of labor and materials indeed varies by region in Belgium.

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Calculate the cost of a storey addition in Belgium using the Avenir Rénovations estimator

Avenir Rénovations provides you in Belgium with a reliable and secure tool to calculate the amount of your storey addition work. It is a user-friendly simulator that allows you to establish your budget accurately. With our system, you can obtain an online estimate of the price of your home extension in Belgium.

Enter the necessary information for your project, such as the area of your vertical extension, and discover the amount to budget for your work. Trust Avenir Rénovations in Belgium to obtain a reliable estimate of the cost of your storey addition.

Quote template for flat roof house storey addition in Belgium

Avenir Rénovations offers you in Belgium an example of a complete quote for the storey addition of a flat roof house. This document provides you, on one hand, a clear view of the necessary operations for this type of project. On the other hand, it helps you assess the amount of your own roof extension in Belgium.

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Need further clarification?

Check our recommendations and files dedicated to home extension in Belgium

These contents can assist you in the complete preparation of your house storey addition project in Belgium

Price for the extension of a 20 m² house in Belgium

Price for the extension of a 20 m² house in Belgium

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Price for the extension of a 20 m² house in Belgium

Price for the extension of a 20 m² house in Belgium

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  Quantity Unit Price Excl. VAT Amount Excl. VAT VAT Amount Incl. VAT
1.1 Preliminary analysis of work in Belgium          
1.1.1 Preliminary soil study (Belgium)          
1.1.1.1 Geotechnical soil analysis 1 F 2,690.00 € 2,690.00 € 6 % 2,851.40 €
1.1.2 Stability study (Belgium)          
1.1.2.1 Structural analysis of a load-bearing wall 1 U 1,390.00 € 1,390.00 € 6 % 1,473.40 €
1.1.2.2 Intervention and relocation in Belgium 1 U 153.64 € 153.64 € 6 % 162.86 €
1.2 Preparation & demolition (Belgium)          
1.2.1 Preliminary electrical work (Belgium)          
1.2.1.1 Temporary installation of a construction site panel 1 U 159.72 € 159.72 € 6 % 169.30 €
1.2.1.2 Electrical modifications before work 1 F 490.00 € 490.00 € 6 % 519.40 €
1.2.2 Demolition work (Belgium)          
1.2.2.1 Removal of a mechanical tile roof 198.5 M² 20.42 € 4,053.37 € 6 % 4,296.57 €
1.2.2.2 Removal of existing wooden framework 198.5 M² 25.94 € 5,149.09 € 6 % 5,457.04 €
1.2.2.3 Demolition of masonry and carpentry (Belgium) 36 M² 64.95 € 2,338.20 € 6 % 2,479.49 €
1.2.2.4 Removal of a suspended ceiling 116.5 M² 17.28 € 2,013.12 € 6 % 2,133.91 €
1.2.2.5 Removal of the floor at level R+1 116.5 M² 22.45 € 2,615.43 € 6 % 2,772.36 €
1.3 Work for storey addition – indicative values in Belgium          
1.3.1 Implementation of a concrete chain 20x20 cm 45 ML 52.82 € 2,376.90 € 6 % 2,519.52 €
1.3.2 Supply and installation of a metal beam 1 ML 296.50 € 296.50 € 6 % 314.29 €
1.4 Masonry elevation (Belgium)          
1.4.1 Preparatory work – demolition          
1.4.1.1 Removal of mechanical tile covering 65 M² 20.42 € 1,327.30 € 6 % 1,407.94 €
1.4.1.2 Removal of wooden framework 65 M² 25.94 € 1,686.10 € 6 % 1,786.27 €
1.4.1.3 Removal of zinc gutter with hooks 14 ML 10.27 € 143.78 € 6 % 152.41 €
1.4.1.4 Demolition of a 25 cm masonry wall 15 M² 60.52 € 907.80 € 6 % 962.27 €
1.4.2 Masonry work (Belgium)          
1.4.2.1 Concrete chain 20x20 cm 30 ML 52.82 € 1,584.60 € 6 % 1,679.68 €
1.4.2.2 Wall in hollow concrete blocks 20 cm 85 M² 86.50 € 7,352.50 € 6 % 7,793.65 €
1.4.2.3 Concrete post 20x20 cm 20 ML 135.25 € 2,705.00 €