Prepare your home's EPC assessment

Gather useful property characteristics and documents before contacting an authorised expert.

A general questionnaire cannot calculate an EPC. Energy performance, thermal insulation and emissions are separate indicators. No score, EPC letter, theoretical cost or emissions are assigned here.

Declared characteristics

Property typeYear of constructionHeating typeFacade insulationWindow typeVentilation

Summary to review with the expert

Property type: Not provided / to check
Year of construction: Not provided / to check
Heating type: Not provided / to check
Facade insulation: Not provided / to check
Window type: Not provided / to check
Ventilation: Not provided / to check

This is self-reported information. An EPC requires detailed technical data and an authorised professional; the procedure for an existing home includes a visit.

Ratio from your meter or bill records

Enter delivered energy in kWh over 12 months and the area covering the same scope. The quotient adjusts for neither climate nor occupancy; it does not convert final to primary energy or determine an EPC class. The entered area is not automatically the official energy reference area.

Delivered energy over 12 months (kWh)Corresponding area (m²)

Enter non-negative energy and a strictly positive area to calculate the ratio.

Documents to gather

Prepare available plans, wall and insulation details, installation specifications and any existing EPC. For an existing building, Guichet.lu mentions thermal-energy bills or readings for the previous three years. The exact list depends on the project.

Guichet.lu: procedure and authorised experts

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