Do you want to extend your home to accommodate the youngest child or to create an extra room? Building a house extension can be a good alternative to gain living space without having to move. But before embarking on a house extension project , it is essential to understand the steps and options available to you.
The main thing to remember
There are several styles of extensions: side, raised, veranda, attic conversion or garage conversion.
Certain administrative procedures are mandatory, in particular the prior declaration of work or the building permit.
It is strongly recommended to use a building professional to study the feasibility of an extension project and draw up suitable plans.
The average budget for an extension varies depending on the type of work, but it should cost between €500 and €3,500 per m².
Why build a house extension?
Building an extension can meet multiple needs. Is your family growing or do you need an office for remote working? Building an extension to expand your home has several advantages, including:
Who should you contact to build an extension? Several trades can be involved in a house extension project, depending on the type of work:
Lateral extension
This involves building an additional room on the side or back of your house. This solution is ideal if you have sufficient space around your property. It’s also the most common method, offering many possibilities for customization.
Elevation
Raising your home involves adding an extra floor to your house. This option is particularly suitable for smaller plots where horizontal expansion is not possible. However, this project may involve more complex work, including reinforcing the foundations.
Conversion of the attic
If your home has an unfinished attic, this option is often the most economical. Converting the attic allows you to create additional bedrooms or an office without encroaching on the land.
Veranda
An ideal solution for expanding your space while still benefiting from natural light, a veranda can be a quick and easy option to implement. It can serve as a dining room, living room, or relaxation area.
Converted garage
Whether it’s to create an additional bedroom, an office, or even a separate studio, converting a garage is an attractive option for gaining several square meters.
What steps should I take to build a house extension?
Before starting your extension work, it is essential to follow certain administrative procedures to obtain the necessary authorizations:
Consult your municipality’s PLU : the local urban planning plan governs the building regulations in your area to check the regulations related to house extensions. It will provide you with information on:
What is the budget for building a house extension? Price per m²
Price for a side extension
The average budget for a side extension ranges between €1,500 and €2,500 per m², depending on the materials and the complexity of the work.
Budget for attic conversion
Less expensive than other types of extension, attic conversion generally costs between €500 and €1,600 per m², depending on the work to be carried out.
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