The ecological house, also called eco-construction is a type of housing specially designed to be more environmentally friendly, producing less pollution and allowing energy savings. It also guarantees to reduce the home's energy needs. Building an ecological house therefore involves the use of more environmentally friendly processes and materials. This also applies to equipment and installations which must be less energy-consuming (electrical and heating system).
But above all, it is also a question of complying with the regulations in force regarding the issue of building permits. What are the steps to apply for a building permit for an ecological house and what are the typologies of existing ecological houses?
Apply for the building permit for a ecological house
The construction of an ecological house, like any large-scale work, requires planning permission from the administration. The issuance of this permit will only be effective if the project meets the compliance standards provided for in the town planning rules of the town where the house will be built.
Where to send your building permit request?
Your permit request must be sent by registered mail with acknowledgment of receipt to the town hall. You can also file it directly, but in any case, it will send 4 copies of the document. This being done, you will receive a confirmation including a registration number and the start date of the work from the urban planning department. To facilitate the constitution of your request, it is advisable to call on an architect. Besides, this recourse is compulsory as soon as you build a building of more than 150 m².
Le processing time is 2 months from the filing of the application, in particular for the construction of a detached house. The absence of a response implies acceptance in principle, however, to reassure you, you can request a certificate from the town hall.
You can also use the services of specialists who will help you build your case, in order to be sure that it respects all the imposed standards. You will thus optimize your chances of being granted your building permit, without wasting time.
What documents must be provided for the request?
The following documents must be attached to your building permit application:
- A CERFA form for building permit corresponding to the type of work (construction of a detached house, annexes, extension, etc.) that you can download from specialized sites ;
- A ground plan of the construction;
- A site situation plan;
- A section plan of the terrain;
- A descriptive note of the land and the project;
- A plan of the facades and roofs;
- A photograph of the land and its immediate environment;
- A photograph of the terrain locating it in its distant environment;
- A graphic document illustrating the project in its environment.
Please note that depending on the type of construction and the situation, additional documents may be required by the administration.
What are the costs to consider?
The building permit application is a free process. However, you will have to pay the local taxes which include the development tax, the property tax and the housing tax.
On the other hand, you will also have to pay the charges relating to the hiring of an architect or the design office. By being accompanied by an architect, you will have to pay the latter's fees which can be between 50 euros HT / m² (with a minimum of 1500 euros) and up to 15% of the total cost of the work depending on the scope of its missions.
Finally, you will also need to take into account costs related to the thermal study, especially if your construction totals more than 50m². The thermal engineering office can invoice its service between 50 and 750 euros including tax.
Which ecological house to build?
Building an ecological house can cost you up to 20% more than a conventional house, but this investment will pay off in terms of energy savings. Moreover, this type of construction is eligible for certain aids and subsidies. Here are the 4 types of green building that you can consider:
The positive house is an energy independent home that is designed to produce more energy than it consumes. To do this, it will have its own efficient energy production unit, such as solar panels. If this type of construction is particularly expensive in works, it gives you the possibility of making a return on your investment by reselling energy to your supplier and substantial savings on a daily basis.
The construction of a positive house costs between 1500 and 3500 euros / m².
The bioclimatic house uses the natural resources of its immediate environment to ensure energy saving and a comfortable environment. Instead of using expensive systems (solar heating, pompe à chaleur), it is enough to design the house in such a way that it exploits natural resources, and use insulating materials.
The works for the construction of a bioclimatic house cost between 1500 and 2500 euros / m².
La BBC house
The BBC house is widely used in France when it comes to ecological constructions. BBC (Low Consumption Building) is an abbreviation which refers to a label that pursues the goal of limiting the energy consumption of new constructions to a certain threshold.
Note also that this standard has been made mandatory for all building permits issued since 2013. Thus, in accordance with this label and thermal regulation RT 2012, all new homes must not exceed 50 kWh d primary energy per m² per year.
The BBC house can be built from 1200 up to 1800 euros / m²;
The passive house is a construction whose energy consumption is particularly low. Indeed, to heat the whole building, the heat produced by the interior of the house, that brought by the sun, and that coming from the equipment are used. As for the bioclimatic house, special care is taken to insulate the rooms in the house, and the amount of sunshine is optimized using glazing.
The passive house costs between 1500 and 3500 euros / m².