Energy Performance Certificate (CPE) in Luxembourg: Price, Validity and Obligations (2026 Guide)

The energy performance certificate (CPE), also known as the "Energiepass", is an essential document in any real estate transaction in Luxembourg. Sale, rental, new construction: in most situations, the law requires it to be presented. How much does it cost? How long does it remain valid? Who can issue it? Here is the complete practical guide, with direct answers to every question.

What Is the CPE (Energy Performance Certificate)?

The CPE is an official document that assesses the energy performance of a building in Luxembourg. Issued by an authorised expert, it assigns the property classes ranging from A (highly efficient) to I (very energy-intensive) based on several indicators:

• Energy performance class: the building's primary energy consumption
• Thermal insulation class: quality of the building envelope (walls, roof, windows)
• CO2 emissions: environmental impact of heating and hot water

In practical terms, the CPE allows a buyer or tenant to compare properties objectively and anticipate future energy bills. It also contains improvement recommendations tailored to the building. The legal framework is set by Luxembourg's legislation on the energy performance of buildings (grand-ducal regulation), which introduced the certificate progressively from 2008 for new builds, then extended it to sales and rentals of existing properties from 2010.

Is the CPE Mandatory in Luxembourg?

Yes. The CPE is mandatory in Luxembourg in the following situations:

• Sale of a property: the certificate must be handed to the buyer at the latest when the notarial deed is signed. The notary checks that it is in the file.
• Rental: the landlord must be able to show the CPE to prospective tenants and provide a copy when the lease is signed.
• New construction: a CPE is required from the building permit application stage, then issued upon completion of the building.
• Major transformation or extension: substantial modifications to the building envelope also trigger the obligation.
• Property listings: the energy class must appear in every sale or rental advertisement.

Without a certificate, the owner risks fines — and above all practical roadblocks: a notary will not finalise the sale without this document, and a buyer can demand it before committing. Failing to provide a CPE therefore almost always delays the transaction. The administrative portal guichet.lu details the official procedures related to the certificate.

How Much Does a CPE Cost in Luxembourg?

There is no regulated tariff: the price of a CPE is set freely by the expert who issues it. Prices vary depending on the provider, the size and complexity of the property, and the availability of documents (plans, heating bills). As a guide, here are the ranges generally observed:

Property type	Indicative price range
Apartment	€300 to €500
Single-family house	€400 to €700
Large or complex house	€600 to €900
Small residential building (shared certificate)	On quote, often €800 to €1,500

Note: indicative amounts including VAT, as observed on the market. Always request several quotes.

Some factors that affect the price:

• Missing documents: if the expert has to reconstruct plans or measure the building, the cost increases
• Building complexity: multiple extensions, mixed heating systems
• Travel: some providers charge travel costs separately

How Long Is a CPE Valid?

An energy performance certificate is valid for 10 years from its date of issue. Before ordering a new certificate, check whether a still-valid CPE exists: it may have been issued at construction, during a previous purchase or an earlier rental. For an apartment, a certificate issued for the whole residence can also be used.

Note: a new CPE becomes necessary before the 10-year deadline if the building undergoes a substantial transformation (insulation, heating replacement, extension). This is often good news for the seller: after energy improvement works, a new certificate reflects the improved class and enhances the property's value.

What Do the Energy Classes A to I Mean?

The Luxembourg CPE rates residential buildings on a nine-level scale:

• Class A: passive house, maximum performance (the standard for recent new builds)
• Class B: low-energy house
• Classes C-D: good performance, typical of recent or well-renovated buildings
• Classes E-F: average performance, older buildings partially renovated
• Classes G-I: energy-intensive buildings, generally old and unrenovated

The class displayed in listings directly influences the property's attractiveness: buyers now factor energy costs and renovation budgets into their price offers.

Who Can Issue a CPE and How Do You Obtain One?

The CPE cannot be drawn up by the owner. Only authorised professionals may issue it:

• Architects and consulting engineers authorised to practise in Luxembourg
• Experts approved by the competent ministry for residential buildings

The process generally involves four steps:

1. Request quotes: compare several providers (prices and lead times vary significantly)
2. Prepare the documents: building plans, year of construction, energy bills, details of the heating system and works carried out
3. On-site visit: the expert records the building's characteristics (envelope, windows, technical installations)
4. Issue of the certificate: calculation and delivery of the document, generally within 1 to 2 weeks after the visit

The national structure Klima-Agence also offers neutral, free guidance on energy matters, including state renovation aid. Remember to include the CPE in your file of mandatory documents for the sale from the start of your project.

What Impact Does the CPE Have on Your Sale?

Beyond the legal obligation, the energy class has become a major negotiation lever. A property rated A or B sells faster and at a higher price, while a class G, H or I can lead to a discount of 15 to 25%. We have dedicated a full article to the CPE's impact on the sale price, and another to profitable energy renovations before a sale.

FAQ

Can You Sell a Property Without a CPE in Luxembourg?

No, not under normal circumstances. The energy performance certificate is one of the documents required for a property sale in Luxembourg: the seller must hand it to the buyer at the latest when the notarial deed is signed, and the notary checks that it is in the file. In practice, the absence of a CPE blocks or delays the transaction, and the energy class must in any case appear in the listing as soon as the property goes on the market. An owner who fails to comply with these obligations risks fines. The right reflex: at the very start of your sale project, check whether a valid certificate exists (it is valid for 10 years) and, if not, order one before publishing your listing. Allow one to two weeks to obtain it.

Who Pays for the CPE: The Seller or the Buyer?

The owner of the property must have the certificate drawn up and bear its cost. In a sale, it is therefore the seller who pays for the CPE before putting the property on the market; in a rental, it is the landlord. The buyer or tenant simply receives a copy of the document, free of charge. The cost remains modest compared with the amounts involved in a transaction: generally between €300 and €500 for an apartment and between €400 and €700 for a house, depending on the provider and the complexity of the property. This amount can also be seen as an investment: a recent, well-documented certificate reassures buyers and prevents last-minute renegotiations.

Is the CPE Mandatory for a Rental in Luxembourg?

Yes. The obligation does not only concern sales: any landlord must hold a valid energy performance certificate to put a home up for rent in Luxembourg. The energy class must appear in the rental listing, the certificate must be available to show prospective tenants, and a copy must be handed to the tenant when the lease is signed. The same certificate can be used for several successive rentals as long as it remains valid (10 years) and the building has not undergone a substantial transformation. For an apartment located in a residence, the certificate issued for the whole building can be used, which allows the cost to be shared among co-owners.

How Can You Improve Your Property's Energy Class Before Selling?

The most effective levers, in order of cost-benefit ratio, are: insulating the roof, replacing an old boiler with a condensing system or a heat pump, switching to double or triple glazing, and insulating the external walls. State aid for energy renovation exists in Luxembourg and can cover a significant share of the works; Klima-Agence offers neutral, free advice to identify it. Before starting any works, compare the cost of the project with the expected added value: moving from class G to class D can significantly increase the sale price, but the operation is not always profitable if the sale is urgent. Our guide to energy renovation before selling details the calculations.

Where Can You Find an Approved Expert to Issue a CPE?

You can contact an architect or consulting engineer authorised to practise in Luxembourg, or an expert specifically approved by the competent ministry to certify residential buildings. Official information on the procedure is available on guichet.lu, and Klima-Agence can guide you on energy-related questions. In practice, request two or three quotes: prices vary significantly from one provider to another for an equivalent service, as do lead times (allow one to two weeks in general between the visit and delivery of the certificate). Check that the quote includes the on-site visit and state upfront which documents you have (plans, heating bills): a complete file reduces the expert's working time — and therefore the invoice.