Home information logbook (CIL) in France: content, sale

Which homes have been concerned since 2023?

The CIL covers premises intended for habitation and their outbuildings, including logements-foyers (residential hostels), caretakers’ flats, staff rooms, tied accommodation, homes included in a commercial lease and furnished premises let out (art. L126-35-3). It does not concern all existing homes: it is triggered by a dated event.

Sources: CCH, art. L126-35-4; ANIL.

Which renovation works? Only those with a significant impact on energy performance trigger the logbook (service-public.gouv.fr, F36759):

• thermal insulation of the roof or loft;
• insulation of walls facing the outside or an unheated area;
• insulation of glazed walls and doors facing the outside, including replacing glazing;
• insulation of lower floors;
• installing, regulating or replacing heating, cooling, the associated ventilation or domestic hot water production;
• installing heating or hot water equipment using renewable energy.

What the logbook contains

For a new home, the CIL comprises (F36759):

• the floor plans and sections of the home;
• the plans, diagrams and descriptions of the water, electricity, gas and ventilation networks, stating whether they correspond to the design or to the construction as built;
• the list and characteristics of the insulation materials: type (brand and reference), thermal resistance and conductivity, thickness, area of insulation;
• the operating, maintenance and servicing manuals for heating, cooling, ventilation and hot water equipment: brand, model, energy, serial number, power, energy label;
• the documents attesting to energy performance: DPE, certificate of compliance with the thermal or environmental regulations if required, labels or certifications, energy audit.

For a renovation, the logbook also states the dates and descriptions of the works, and is limited to the materials and equipment installed on that occasion (F36759). The ministry’s guide specifies that a quote accompanied by product sheets, or an invoice describing the works and their date, can serve as a basis.

Servicing certificates for the boiler or heat pump may also be attached. The CIL is kept on paper or digitally, at the owner’s choice; an official template is available on service-public.gouv.fr (F36759). The owner updates it each time work is done in the home.

Who provides the information?

The logbook is drawn up by the owner, whether occupying or not, but it relies on the documents that professionals must hand over at the latest on completion of the works (art. L126-35-5; ANIL). This information is provided in digital format or, at the owner’s request, in another format (F36759).

Where the owner is not the maître d’ouvrage (client commissioning the works), for example for a home bought off-plan (VEFA) or works decided in a co-ownership, it is the maître d’ouvrage who provides this information, at the latest on delivery or completion (ANIL). If the works received a grant or support, the Anah (national housing agency) may make available the technical documents already supplied when the application was processed (F36759).

The CIL in a co-ownership

The logbook covers the home, not the building. In a copropriété (building in co-ownership), it exists alongside the carnet d’entretien (maintenance log) kept by the syndic (building manager), which concerns the common parts. The ministry’s guide suggests an exchange: you can send your CIL to the syndic to help it target the works in the multi-year plan, and the syndic can provide you with the manual for the communal boiler or the description of external insulation carried out on the building. For works voted at the general meeting, see our guide on rénovation en copropriété (renovation in a co-ownership).

On a sale: handing it over to the buyer

On any transfer of ownership, the logbook is handed to the buyer at the latest when the final deed is signed, and the buyer attests to this in the deed (art. L126-35-10). The CIL is handed over as it stands at the time of the sale: missing data must not be added or changed afterwards (F36759).

Service-public.gouv.fr also places the CIL in the dossier de diagnostic technique (survey file) that the seller attaches to the promesse (preliminary contract) or the deed of sale (F10798; F37190). Handing it over from the preliminary contract stage lets the buyer take it into account before committing. See also our guides on diagnostics obligatoires (mandatory surveys) and the étapes de la vente (steps in selling).

Which professional to consult

The diagnostiqueur (property surveyor) carries out the DPE included in the logbook, and can draw on the information it contains. On a sale, the notaire (notary) records the attestation that the CIL has been handed over in the final deed. The agent immobilier (estate agent) can assemble the logbook with the survey file from the preliminary contract stage.