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Understanding the administrative procedures for a house extension

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what are the administrative procedures for a house extension?

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It's difficult to see clearly the administrative procedures for a house extension. However, the latter are the guarantors of a successful house extension project. When you want to enlarge your house, the most lasting solution is to turn to an experienced professional.

A house builder since 1972, Maisons SIC can support you in your administrative procedures for your house extension. Call on the best to avoid any unpleasant surprises!


Extension and Local Urban Plan: what to take into account in your administrative procedures?

Before initiating your extension project, it is crucial to look into the Local Urban Planning Plan (PLU) of your municipality.

This key document, accessible at town hall or online, contains vital information on the applicable town planning rules. By consulting it, you will discover the guidelines regarding the space to leave free between properties, the materials approved for your extension, and any restrictions on colors or materials.

This preliminary step is essential to ensure that your administrative procedures for an extension go smoothly.

The plus plays a determining role in the definition of your project. It clearly indicates the authorized expansion possibilities, taking into account your residential area and the specific characteristics of your property.

Whether for a horizontal extension, the addition of a veranda or even the creation of a terrace, compliance with the PLU is imperative. This guide will help you understand whether your project requires a simple prior declaration of works or a building permit, in particular if the planned extension exceeds 40 m² or if it modifies the supporting structure of your house.

When the administrative procedures for an extension are clarified thanks to the PLU, you have a precise vision of the following steps. This includes filing the required documents at the town hall, whether it is a declaration of works for small expansions or a building permit for more ambitious projects.

Complying with the PLU rules not only ensures the conformity of your extension but also facilitates its integration into the landscape uurban or rural in your municipality.



The prior declaration of works: the essential procedure for the extension

how to complete the preliminary work declaration?

The prior declaration of work represents an essential step in the administrative procedures for an extension.

Before extending your house, this formality must be completed to obtain approval from the town hall. It applies to many projects, including when the planned expansion does not exceed 40 m². The declaration is essential, because it ensures that your project complies with the Local Urban Planning Plan (PLU) and other urban planning rules in force.

Why this approach? It validates that the extension will not harm the urban or rural environment and that it is in harmony with the surrounding buildings. Whether you want to add a veranda, a terrace, or extend your living room, the prior declaration is your first step.

Concerning the documents to be provided, the list generally includes a plan of the land, a drawing of the projected extension and a detailed description of the project. To facilitate the approval of your file, be sure to present clear and precise documents. Well-drawn plans and a detailed explanation of your project can speed up the process.


Some tips for a successful preliminary declaration of works:

  • Before submit your file, check that it is complete. An incomplete file may cause delays.
  • Consult the PLU of your municipality to align your project with local directives.
  • consider meet an urban planning advisor from your town hall to discuss your project before submitting your declaration. This preliminary step can enlighten you on possible adjustments necessary to ensure acceptance of your request.

Following these steps and advice will facilitate your administrative procedures for an extension, allowing you to realize your project in the best conditions.


Building permit for an extension

How to obtain your building permit?

Obtain a building permit is a crucial step in the administrative procedures for an extension, especially when your project exceeds certain limits.

Unlike the prior declaration of works, a building permit is required for large-scale extensions. In general, any extension greater than 40 m² in an area covered by a Local Urban Plan (PLU) requires this document.

Urban artist if the addition brings the total surface area of ​​the house to more than 150 m², the permit becomes essential, regardless of the size of the extension.

To put together a solid building permit file, careful preparation is essential. This file must include a site plan of the land, a mass plan of the constructions to be built or modified, and detailed drawings of the planned project. Each document must be precise and faithfully reflect the planned work.


How to properly prepare your building permit file?

  1. Make sure you understand the PLU requirements of your municipality. These rules can influence the design of your extension.
  2. Include a detailed description of your project, highlighting its integration into the existing environment and its compliance with current standards.
  3. Consider assistance from an architect for large-scale projects. Their expertise can be crucial in meeting technical and aesthetic requirements.

Following these steps will greatly contribute to the solidity of your building permit file, thus facilitating the administrative procedures for an extension. A well-prepared file that complies with local standards increases your chances of obtaining a positive response from the town hall, allowing you to carry out your extension project with complete peace of mind.


What administrative procedures for which extension project?

what are the different possible extension projects?

The administrative procedures for an extension vary depending on the type of project envisaged. Each extension has its own constraints and standards to respect, influencing the required formalities.

For horizontal extension, the main constraints lie in respecting the PLU and property limits. A prior declaration is often sufficient for projects of less than 40 m², but beyond that, a building permit is required.

Energy renovation requires following RT 2012 standards, in transition to RT 2020, aimed at improving the energy efficiency of buildings. These projects may require a prior declaration or a building permit depending on the scale of the work and their impact on the exterior.

For ITE (Exterior Thermal Insulation) and exterior cladding, it is crucial to check the PLU guidelines regarding permitted materials and colors. A prior declaration of works is generally sufficient for these modifications.

Verandas and terraces are subject to distinct administrative specificities. A conservatory may require planning permission if it exceeds 20m², while a terrace can often be fitted out with a simple declaration, depending on its height and surface area.

Each extension project requires a specific approach to administrative procedures, essential to align your project with local and national regulations.



How Maisons SIC can help you with your administrative procedures for an extension

As part of the administrative procedures for an extension, SIC houses offers personalized support at each stage, thus simplifying the process for owners.

With over 50 years of experience in construction in the southwest of France, Maisons SIC has the expertise to navigate through administrative complexities, ensuring a smooth and stress-free experience for its clients.

The company understands the importance of professional support in the house extension process. Whether your project concerns an interior renovation, an energy renovation, an expansion, or the beautification of your exteriors, Maisons SIC adapts its approach according to your budget, your needs and your desires.

With a single privileged contact, Maisons SIC promises a tailor-made, turnkey service, from the study of your project to the finalization of the work.

Maisons SIC also provides a showroom for the choice of your materials and equipment, ensuring that every aspect of your extension reflects your tastes and meets your expectations. Our commitment to appropriate follow-up guarantees that your renovation or extension will be carried out in compliance with the quality-cost-deadline triangle.


Contact Maisons SIC to start your extension project with peace of mind!


From initial planning to completion of the work, Maisons SIC is committed to providing impeccable quality, compliance with deadlines and reliable after-sales service. Our company also provides ten-year insurance coverage on all its achievements, demonstrating its commitment to the satisfaction and peace of mind of its customers.


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