This work falls into the following categories:

• Thermal insulation of roofs. This is all the work that implements a method of thermal insulation of the attic or the roof (including lost attic, creeping roof, or terrace roof). For accommodation in overseas departments and regions (Drom)However, this work also includes the installation of a ventilated overroof or a solar protection system for the roof.
• Thermal insulation of the exterior facing walls. This is all the work that implements a method of thermal insulation on walls with a facade or pinion, or on walls separating a heated zone from an unheated zone. For the dwellings located in the Drom, this work also includes the installation of opaque wall protections against solar radiation.
• Thermal insulation of glass walls and doors facing the exterior. These are the thermal insulation work associated with the installation of a complete window or French window with insulating glazing and the thermal insulation work associated with the replacement of glazing on an existing window or French window. For the dwellings located in Drom, this work also includes the installation of bay protection (fixed or mobile), against solar radiation.
• Insulation of low floors. This is all the work that implements a method of thermal insulation of low floors on a building, sanitary vacuum or unheated basement.
• Installation, regulation or replacement of heating or cooling systems, in association with them, including the economic and high-performance ventilation systems which may be associated with them, or the production of domestic hot water. This includes all heating, cooling and domestic hot water production equipment and equipment for connection to a heat or cold network. This work also covers heat emitters, the distribution network and control systems.
• Installation of heating or domestic hot water equipment using a renewable energy source.

CIL is required for work on an existing dwelling (and its annexes, e.g. dependency) subject to a city planning permit (building permit or preliminary declaration of works) filed since 1^er january 2023.

However, where no city planning authorization is required, the CIL must be drawn up for work on collective or individual dwellings for which an accepted estimate is given since 1^er january 2023. In the absence of an estimate, the CIL must be established for work that started on that date.

The CIL is established by the owner of the dwelling on the basis of information provided by the professional who carried out the renovation work on the dwelling. However, when the owner is not the contracting authority of the works, the information is transmitted by the owner of the work.

The information must be transmitted to the owner of the dwelling at the latest on receipt of the work in a digital format (e.g. PDF document, USB stick).

If the owner so requests, this information shall be transmitted in another format.

The CIL shall contain the following elements:

• Dates and job descriptions carried out.
• List and characteristics of materials used in the work thermal insulation of the roof, walls facing the exterior, glazed walls and doors facing the exterior, low floors, when these materials have a direct impact on the energy performance of the housing. The CIL must then describe the nature of the insulating material (make and reference), its thermal characteristics (thermal resistance, thermal conductivity, thickness), insulating surface and, possibly, the interface treatment solutions used to ensure the continuity of the insulation and of the airtightness.
• Equipment operation, maintenance and servicing records heating or cooling systems, including any economic and efficient ventilation systems associated with them, or the production of domestic hot water settled during the works, where such equipment has a direct impact on the energy performance of the dwelling. The CIL must then describe the nature of the equipment (make, model, energy, evacuation method, serial number, power), the energy labeling, and in the case of connection to a heat or cold network, the delivery station which constitutes the exchanger between the heat or cold network and the housing.
• Operating, maintenance and servicing instructions for equipment heating or domestic hot water using a renewable energy source where such equipment has a direct impact on the energy performance of the dwelling. The CIL must then describe the nature of the equipment (make, model, energy, evacuation method, serial number, power), the energy labeling, and, in the case of connection to a heat or cold network, the delivery station which constitutes the exchanger between the heat or cold network and the housing.
• Documents to certify the energy performance of the dwelling and know how to improve it where they have been made: These must be the following documents:
  
  • Energy Performance Diagnostic (EDP)
  • Document produced by the contracting authority which attests to the fact that the thermal and environmental regulations have been taken into account, where a document is required
  • Certificates for the issue of labels or certifications highlighting the energy performance qualities of the dwelling, where the dwelling has been subject to them
  • Energy audit of housing.
  
  Documents attesting to the performance of maintenance operations to maintain the energy performance of heating systems may also be attached to the CIL (e.g. a document attesting to the maintenance of the boiler).

Yes, in the case of a sale of the dwelling, the owner must hand over the CIL, as it is at the time of the sale, to the purchaser at the latest when signing the authentic instrument sales.

The purchaser must then certify that the CIL has been delivered to him. This certificate must be in the authentic instrument.